Wireless earphone

Abstract

The embodiment of the invention provides a wireless earphone, relates to the technical field of antennas, and is used for enabling the wireless earphone to obtain relatively high tone quality in a surrounding environment with relatively high interference noise. The antenna structure of the wireless earphone comprises a first radiator, a feed end, a second radiator and a grounding end. The feed end divides the first radiator into a first branch knot and a second branch knot which are crossed. A gap is arranged between the second radiator and the second branch knot, and the second radiator and the second branch knot can form a slot antenna. The grounding terminal is arranged on the second radiator. The first branch generates first resonance of a first communication frequency band, and the slot antenna generates second resonance of a second communication frequency band. The wireless earphone can cover the first communication frequency band and the second communication frequency band.

Description

Technical Field

[0001] This application relates to the field of antenna technology, and in particular to a wireless earphone. Background Art

[0002] With the continuous development of electronic technology, users have an increasingly high demand for portable intelligent wearable products, such as wireless earphones. Wireless earphones can be connected to a terminal, such as a mobile phone, a tablet or a computer, via Bluetooth, so as to cooperate with the above terminal to perform functions such as playing music and making calls. For wireless earphones, the user experience of high-definition lossless sound quality has always been the goal of product design. However, when the user uses the above wireless earphones in a relatively noisy environment, the interference noise in the surrounding environment of the earphones is relatively strong, so that high-definition communication cannot be achieved, and the sound quality of the wireless earphones is reduced. Summary of the Invention

[0003] This application provides a wireless earphone, which is used to enable the wireless earphone to obtain higher sound quality in a surrounding environment with strong interference noise.

[0004] To achieve the above object, this application adopts the following technical solutions:

[0005] In one aspect of the present application, a wireless earphone is provided, which may include an ear cup, an ear stem, and an antenna structure. The ear stem is arranged in a first direction, and one end of the ear stem facing the ear cup is connected to the ear cup. The antenna structure is arranged inside the ear stem, and the antenna structure includes a first radiator, a feeding end, a second radiator, and a grounding end. The feeding end is arranged on the first radiator, and the feeding end divides the first radiator into a first branch and a second branch. The first branch has an open end on the side facing away from the ear cup, and a part of the first branch in the first direction and a part of the second branch in the first direction are arranged opposite to each other. The second radiator is arranged in the first direction on the side of the second branch facing away from the ear cup, and there is a gap between the second radiator and the second branch. The second radiator and the second branch can form a slot antenna. The grounding end is arranged on the second radiator. Among them, the first branch is used to generate a first resonance in a first communication frequency band, and the second branch and the second radiator are used to generate a second resonance in a second communication frequency band. Any frequency in the second communication frequency band is greater than any frequency in the first communication frequency band. In this case, when the user uses the wireless earphone in a quiet environment, the antenna structure of the wireless earphone can operate in the first communication frequency band (for example, the frequency band where 2.4 GHz is located) or the second communication frequency band (for example, the frequency band where 5 GHz is located), so that the wireless earphone can establish a communication connection with a mobile terminal, such as a mobile phone. In addition, when the user is in a noisy environment, such as an airport or a high-speed rail station where there is a dense crowd, the antenna structure of the wireless earphone can operate in the second communication frequency band (for example, the frequency band where 5 GHz is located). In this way, even if the interference noise in the surrounding environment where the wireless earphone is located is large, but because the frequency spectrum of the second communication frequency band (for example, the frequency band where 5 GHz is located) is wider, and the noise is much lower than that of the first communication frequency band (for example, the frequency band where 2.4 GHz is located), the frequency band where 5 GHz is located can support high-definition communication, improving the communication quality and anti-interference ability of the wireless earphone.

[0006] In an alternative embodiment, the first stub is an L-shaped stub. The first stub includes a first strip portion and a second strip portion. The first strip portion is arranged along a first direction, and the second strip portion is arranged along a second direction. The second direction intersects the first direction. The first strip portion, the second strip portion, and the second stub are connected in sequence. The second strip portion is located on the side of the first strip portion facing the earcup. The second stub is a strip-shaped stub and is arranged along the first direction. The second stub and the first strip portion are arranged opposite to each other. The feeding end is located on the side of the second stub away from the second radiator. Since the feeding end is arranged on the first radiator, the feeding end can be located above the second radiator, so that the feeding end can be arranged close to the earcup. As can be seen from the above, a speaker is arranged in the earcup, and the outer contour of the earcup at least partially includes an arc portion to fit the user's auricle and / or ear canal. In addition, a circuit board and an antenna structure are arranged in the earstem, and the interface of the earstem can be strip-shaped. The diameter or thickness of the earcup can be greater than the thickness of the earstem. In this way, when the user wears the wireless earphone, by arranging the feeding end close to the earcup, the feeding end can be located at the upper end of the earstem. There can be components such as a circuit board and the speaker in the earcup between the feeding end and the human face. Therefore, compared with the solution of arranging the feeding end at the lower end of the earstem (with a circuit board between the feeding end and the human face), the distance between the feeding end and the human face can be made larger, and the feeding end is arranged farther away from the human face, so as to avoid the absorption of the feeding signal by the human body and improve the utilization rate of the signal. In addition, by arranging the feeding end on the side of the second stub away from the second radiator, when the user wears the wireless earphone, the feeding end can be located at a position away from the user's auricle, so as to reduce the absorption of the feeding signal by the human body.

[0007] In an alternative embodiment, the physical length of the first strip portion is greater than the physical length of the second strip portion. In this way, the first strip portion with a larger length in the first stub can be arranged along the long side of the earstem, and the second strip portion with a smaller length in the first stub can be arranged along the short side of the earstem, so that when the first stub is arranged around the edge of the earstem, the internal space structure of the earstem can be reasonably utilized, thereby improving the space utilization rate of the middle position inside the earstem.

[0008] In an alternative embodiment, the second stub is an L-shaped stub. The second stub includes a third strip portion and a fourth strip portion. The third strip portion is arranged along the second direction, and the fourth strip portion is arranged along the first direction. The second direction intersects with the first direction. The first stub, the third strip portion, and the fourth strip portion are connected in sequence. The third strip portion is located on the side of the fourth strip portion facing the earcup. There is a gap between the fourth strip portion and the second radiator. In addition, at least a part of the first stub along the first direction is arranged opposite to the fourth strip portion. The feeding end is located on the side of the third strip portion facing the first stub. In this way, since the third strip portion is located on the side of the fourth strip portion facing the earcup, when the user wears the wireless earphone, by arranging the feeding end on the third strip portion, the feeding end can be arranged close to the earcup, so that the feeding end can be located at the upper end of the earstem. Similarly, a circuit board, components such as a speaker in the earcup, etc. can be arranged between the feeding end and the human face. Therefore, compared with the scheme of arranging the feeding end at the lower end of the earstem (with a circuit board arranged between the feeding end and the human face), the feeding end can be arranged far from the human face, so as to avoid the absorption of the feeding signal by the human body and improve the utilization rate of the signal. In addition, by arranging the feeding end on the side of the third strip portion facing the first stub, when the user wears the wireless earphone, the feeding end can be located at a position far from the user's auricle, so as to reduce the absorption of the feeding signal by the human body.

[0009] In an alternative embodiment, the first stub includes a first strip portion and a fifth strip portion. The first strip portion is arranged along the first direction, and the fifth strip portion is arranged along the second direction. The fifth strip portion, the first strip portion, and the second stub are connected in sequence. The first strip portion is arranged opposite to the fourth strip portion. In this way, when the physical length of the part of the first stub along the first direction cannot make the electrical length of the first stub reach 1 / 4 wavelength of the first communication band, by arranging the above-mentioned fifth strip portion to increase the overall physical length of the first stub, the electrical length of the first stub can reach 1 / 4 wavelength of the first communication band.

[0010] In an alternative embodiment, the physical length of the first strip portion is greater than the physical length of the fifth strip portion. In this way, the first strip portion with a larger length in the first stub can be arranged along the long side of the earstem, and the fifth strip portion with a smaller length in the first stub can be arranged along the short side of the earstem, so that when the first stub is wound around the edge of the earstem, the internal space structure of the earstem can be reasonably utilized, thereby improving the space utilization rate of the middle position inside the earstem.

[0011] In an optional embodiment, a first spacing H1 is provided between an end of the fifth strip-shaped portion away from the first strip-shaped portion and an end of the second radiator away from the ear bag, and H1 ≥ 1 mm. Since the fifth strip-shaped portion is arranged along the second direction, it is possible to avoid a close spacing between the fifth strip-shaped portion and the second radiator, thereby preventing the antenna pattern of the slot antenna formed by the second branch and the second radiator from being affected.

[0012] In an optional implementation, the ratio of the physical length of the first branch to the physical length of the second branch is between 1.5:1 and 2.5:1. In this way, the electrical length of the first branch can be 1 / 4 wavelength of the first communication frequency band, and the electrical length of the second branch and the second radiator can be 1 / 4 wavelength of the second communication frequency band respectively.

[0013] In an optional embodiment, the electrical length of the first branch is 1 / 4 wavelength of the first communication frequency band, so that the first branch can generate a first resonance in the first communication frequency band. In addition, the electrical lengths of the second branch and the second radiator are respectively 1 / 4 wavelength of the second communication frequency band, so that the slot antenna formed by the second branch and the radiator can generate a second resonance in the second communication frequency band.

[0014] In an optional embodiment, the width of the gap is between 0.4 mm and 1 mm. When the gap width between the second branch and the second radiator is less than 0.4 mm, the size of the gap is small and the processing accuracy requirement is high. Or, for example, when the gap width between the second branch and the second radiator is greater than 1 mm, the coupling effect between the first branch and the second radiator will be reduced, making it difficult for the second branch and the second radiator to form a slot antenna.

[0015] In an optional embodiment, a portion of the first branch disposed along the first direction has a second spacing H2 with the second radiator, where H2 ≥ 0.5 mm. In this way, it is possible to avoid the portion of the first branch disposed along the first direction being too close to the second radiator, thereby preventing the antenna pattern of the slot antenna formed by the second branch and the second radiator from being affected.

[0016] In an alternative embodiment, the second communication frequency band is divided into a first sub - communication frequency band and a second sub - communication frequency band, and any frequency in the first sub - communication frequency band is less than any frequency in the second sub - communication frequency band. The 1 / 4 - wavelength line common - mode of the first stub is used to operate in the first communication frequency band. The 1 / 2 - wavelength slot common - mode of the second stub and the second radiator is used to operate in the first sub - communication frequency band, and the current directions on the second stub and the radiator are the same. The 1 / 2 - wavelength slot differential - mode of the second stub and the second radiator is used to operate in the second sub - communication frequency band, and the current directions on the second stub and the radiator are opposite. In this way, when the 1 / 2 - wavelength slot common - mode of the slot antenna operates in the first sub - communication frequency band f21, the three - dimensional antenna pattern of the antenna structure in the wireless earphone is quite different from that when the 1 / 2 - wavelength slot differential - mode of the slot antenna operates in the second sub - communication frequency band. The above two three - dimensional antenna patterns can be orthogonal or approximately orthogonal, so the defect angles of the above two three - dimensional antenna patterns are complementary. Thus, it is possible to switch the communication frequency bands (i.e., the first sub - communication frequency band and the second sub - communication frequency band) between the wireless earphone and the mobile terminal according to the environment where the user is located, so as to alleviate the problem of communication jamming between the wireless earphone and the mobile terminal.

[0017] In an alternative embodiment, the first stub is further used to generate a third resonance in a third communication frequency band, and the 3 / 4 - wavelength line common - mode of the first stub operates in the third communication frequency band. Among them, any frequency in the third communication frequency band is greater than any frequency in the second communication frequency band.

[0018] In this way, the wireless earphone can also cover the third communication frequency band. Based on this, the electrical length of the first stub can be 3 / 4 of the wavelength of the third communication frequency band.

[0019] In an alternative embodiment, the wireless earphone further includes an antenna bracket. The antenna bracket is arranged in the earpiece, and the antenna structure is arranged on the antenna bracket. The dielectric constant of the antenna bracket is 2.5 - 3, the physical length of the first stub is 15 mm to 25 mm, the physical length of the second stub is 5 mm to 10 mm, and the physical length of the second radiator is 5 mm to 10 mm. In this way, the first stub can generate the first resonance in the first communication frequency band, and the slot antenna formed by the second stub and the second radiator can generate the second resonance in the second communication frequency band.

[0020] On the other hand, the present application provides a pair of wireless earphones, which may include ear cups, ear stems, and an antenna structure. The ear stems are arranged in a first direction, and one end of the ear stems facing the ear cups is connected to the ear cups. The antenna structure is disposed within the ear stems and includes a first radiator, a feeding end, a grounding end, a ground plane, and a first switch. The feeding end is disposed on the first radiator, and the feeding end divides the first radiator into a first branch and a second branch. A part of the first branch along the first direction and a part of the second branch along the first direction are oppositely disposed. The grounding end is disposed on the first branch. There is a gap between the ground plane and at least a part of the first radiator. The first switch is disposed between the grounding end and the ground plane. The first end of the first switch is coupled to the grounding end, and the second end of the first switch is coupled to the ground plane. Wherein, if the first switch is in a first state, the first branch is configured to generate a first resonance in a first communication band. The second branch is configured to generate a second resonance in a second communication band. If the first switch is in a second state, the first branch is configured to generate a second resonance in the second communication band; the second branch is configured to generate a second resonance in the second communication band. Any frequency in the second communication band is greater than any frequency in the first communication band. In this way, by the same token, the wireless earphones having the above antenna structure can cover the first communication band (for example, 2.4 GHz of Bluetooth), and can also cover the second communication band (for example, 5G band of Bluetooth, including 5G L band and 5G H band), so as to be able to switch the communication band between the wireless earphones and the mobile terminal according to the environment where the user is located. For example, when the ambient interference noise is relatively large, by switching to the second communication band (for example, 5G L band and 5G H band) to support high-definition communication.

[0021] In an alternative embodiment, the first branch is an L-shaped branch, the first branch includes a first strip portion and a second strip portion, the first strip portion is arranged in the first direction, the second strip portion is arranged in a second direction, and the second direction intersects the first direction; the first strip portion, the second strip portion, and the second branch are connected in sequence; the second strip portion is located on the side of the first strip portion facing the ear cups. The second branch is a strip-shaped branch and is arranged in the first direction; the second branch and the first strip portion are oppositely disposed. The feeding end is located on the side of the second branch facing the second strip portion. The technical effects of the above feeding end setting position are the same as those described above and will not be elaborated here.

[0022] In an alternative embodiment, the second branch is an L-shaped branch, the second branch includes a third strip portion and a fourth strip portion, the third strip portion is arranged in the second direction, the fourth strip portion is arranged in the first direction, and the second direction intersects the first direction; the first branch, the third strip portion, and the fourth strip portion are connected in sequence. At least a part of the first branch along the first direction and the fourth strip portion are oppositely disposed. The feeding end is located on the side of the third strip portion facing the first branch. The technical effects of the above feeding end setting position are the same as those described above and will not be elaborated here.

[0023] In an alternative embodiment, the first stub includes a first strip portion and a fifth strip portion. The first strip portion is arranged along a first direction, and the fifth strip portion is arranged along a second direction. The fifth strip portion, the first strip portion, and the second stub are connected in sequence. The first strip portion and the fourth strip portion are arranged opposite to each other. The technical effect of the fifth strip portion is the same as described above and will not be elaborated here.

[0024] In an alternative embodiment, there is a first spacing H1 between the end of the fifth strip portion facing away from the first strip portion and the end of the second stub facing away from the earphone housing, where H1≥1mm. The technical effect of the first spacing H1 is the same as described above and will not be elaborated here.

[0025] In an alternative embodiment, there is a third spacing H3 between the portion of the first stub arranged along the first direction and the portion of the second stub arranged along the first direction, where H3≥0.5mm. In this way, it is possible to avoid the influence on the antenna patterns of the first stub and the second stub caused by the relatively close distance between the portion of the first stub arranged along the first direction and the portion of the second stub arranged along the first direction.

[0026] In an alternative embodiment, if the first switch is in the first state, the electrical length of the first stub is 1 / 4 wavelength of the first communication band, and the electrical length of the second stub is 1 / 4 wavelength of the second communication band. In this way, the first stub can generate a first resonance in the first communication band. The second stub is used to generate a second resonance in the second communication band. If the first switch is in the second state, the electrical length of the first stub is 2 / 5 - 2 / 3 wavelength of the second communication band, and the electrical length of the second stub is 1 / 4 wavelength of the second communication band. In this way, the first stub can generate a second resonance in the second communication band, and the second stub can generate a second resonance in the second communication band.

[0027] In an alternative embodiment, the second communication band is divided into a first sub-communication band and a second sub-communication band, and there is no overlap between the first communication band and the second sub-communication band. If the first switch is in the first state, the 1 / 4 wavelength line common mode of the first stub is used to operate in the first communication band. The 1 / 4 wavelength line common mode of the second stub is used to operate in the first sub-communication band. If the first switch is in the second state, the 1 / 2 wavelength loop antenna mode of the first stub is used to operate in the second sub-communication band, and there are currents with opposite directions on the first stub. The 1 / 4 wavelength line common mode of the second stub is used to operate in the first sub-communication band. The technical effects of the above first sub-communication band and second sub-communication band are the same as described above and will not be elaborated here.

[0028] In an optional embodiment, the wireless headset further includes an antenna bracket, the antenna bracket is arranged in the ear handle, and the antenna structure is arranged on the antenna bracket. The dielectric constant of the antenna bracket is 2.5-3, the physical length of the first branch is 10mm-20mm, and the physical length of the second branch is 5mm-10mm. The technical effect of the physical length setting of the first branch and the second branch is the same as described above and will not be repeated here.

[0029] In another aspect of the present application, a wireless headset is provided, which may include an ear bag, an ear handle and an antenna structure. The ear handle is arranged along a first direction, and one end of the ear handle facing the ear bag is connected to the ear bag. The antenna structure is arranged in the ear handle, and the antenna structure includes a first radiator, a first feeding end, a third radiator, a circuit board, a second switch and a third switch. The first feeding end is arranged on the first radiator, and the first feeding end divides the first radiator into a first branch and a second branch. A portion of the first branch along the first direction and a portion of the second branch along the first direction are arranged opposite to each other. The third radiator is arranged on the side of the first radiator away from the ear bag along the second direction. The second feeding end is arranged on the third radiator. The circuit board is arranged in the ear handle. The second switch is arranged between the first feeding end and the circuit board, the first end of the second switch is coupled to the first feeding end, and the second end of the second switch is coupled to the circuit board. The third switch is arranged between the second feeding end and the circuit board, the first end of the third switch is coupled to the second feeding end, and the second end of the third switch is coupled to the circuit board. Among them, if the second switch is in the second state and the third switch is in the first state, the first branch is used to generate the first resonance of the first communication frequency band, and the second branch is used to generate the second resonance of the second communication frequency band. If the second switch is in the first state and the third switch is in the second state, the third radiator is used to generate the second resonance of the second communication frequency band. Any frequency in the second communication frequency band is greater than any frequency in the first communication frequency band. In this way, by the same token, the wireless headset with the above antenna structure can cover the first communication frequency band (for example, the frequency band where 2.4GHz is located), and can also cover the second communication frequency band (including the 5GL band and the 5GH band), so that the communication frequency band between the wireless headset and the mobile terminal can be switched according to the environment in which the user is located. For example, when the surrounding environment interference noise is large, it is switched to the second communication frequency band (for example, the 5GL band and the 5GH band) to support high-definition communication.

[0030] In an optional embodiment, the first branch is an L-shaped branch, and the first branch includes a first strip-shaped portion and a second strip-shaped portion, the first strip-shaped portion is arranged along the first direction, the second strip-shaped portion is arranged along the second direction, and the first strip-shaped portion, the second strip-shaped portion and the second branch are connected in sequence; the second strip-shaped portion is located on the side of the first strip-shaped portion facing the ear bag. The second branch is a strip-shaped branch and is arranged along the first direction. The second branch and the first strip-shaped portion are arranged opposite to each other. The first feeding end is located on the side of the second branch facing the second strip-shaped portion. The technical effect of the above-mentioned setting position of the first feeding end can be obtained similarly, and will not be repeated here.

[0031] In an optional embodiment, the second branch is an L-shaped branch, and the second branch includes a third strip-shaped portion and a fourth strip-shaped portion, the third strip-shaped portion is arranged along the second direction, the fourth strip-shaped portion is arranged along the first direction, and the first branch, the third strip-shaped portion and the fourth strip-shaped portion are connected in sequence. At least a portion of the first branch along the first direction is arranged opposite to the fourth strip-shaped portion. The first feed terminal is located on the side of the third strip-shaped portion facing the first branch. The technical effect of the above-mentioned setting position of the first feed terminal can be obtained in the same way, which will not be repeated here.

[0032] In an optional embodiment, the first branch includes a first strip-shaped portion and a fifth strip-shaped portion, the first strip-shaped portion is arranged along the first direction, the fifth strip-shaped portion is arranged along the second direction, and the fifth strip-shaped portion, the first strip-shaped portion and the second branch are connected in sequence. The first strip-shaped portion and the fourth strip-shaped portion are arranged opposite to each other. The technical effect of the fifth strip-shaped portion is the same as described above and will not be repeated here.

[0033] In an optional embodiment, a first spacing H1 is provided between an end of the fifth strip-shaped portion away from the first strip-shaped portion and an end of the second branch away from the ear bag, where H1≥1mm. The technical effect of the first spacing H1 is the same as described above and will not be described in detail here.

[0034] In an optional embodiment, a third spacing H3 is provided between the portion of the first branch arranged along the first direction and the portion of the second branch arranged along the first direction, where H3≥0.5 mm. The technical effect of the third spacing H3 is the same as described above and will not be described again.

[0035] In an optional embodiment, there is a fourth spacing H4 between the end of the first branch facing the third radiator and the third radiator, and H4 is 0.4mm-1mm. In this way, the influence on the antenna modes of the first radiator and the third radiator caused by the close distance between the end of the first radiator facing the third radiator and the third radiator can be avoided.

[0036] In an alternative embodiment, if the second switch is in the second state and the third switch is in the first state, the electrical length of the first stub is 1 / 4 wavelength of the first communication frequency band, and the electrical length of the second stub is 1 / 4 wavelength of the second communication frequency band. In this way, the first stub can generate a first resonance of the first communication frequency band, and the second stub can generate a second resonance of the second communication frequency band. In addition, if the second switch is in the first state and the third switch is in the second state, the electrical length of the third radiator is 1 / 4 wavelength of the second communication frequency band. In this way, the third radiator can generate a second resonance of the second communication frequency band.

[0037] In an alternative embodiment, the second communication frequency band is divided into a first sub-communication frequency band and a second sub-communication frequency band, and the first communication frequency band does not overlap with the second sub-communication frequency band. If the second switch is in the second state and the third switch is in the first state, the 1 / 4 wavelength line common mode of the first stub is used to operate in the first communication frequency band, and the 1 / 4 wavelength line common mode of the second stub is used to operate in the first sub-communication frequency band. If the second switch is in the first state and the third switch is in the second state, the 1 / 4 wavelength line common mode of the third radiator is used to operate in the second sub-communication frequency band. The technical effects of the above-mentioned first sub-communication frequency band and second sub-communication frequency band are the same as those described above and will not be elaborated here.

[0038] In an alternative embodiment, the wireless earphone further includes an antenna bracket disposed within the earpiece, and the antenna structure is disposed on the antenna bracket. The dielectric constant of the antenna bracket is 2.5 - 3, the physical length of the first stub is 15 mm to 25 mm, and the physical length of the second stub is 5 mm to 10 mm. The technical effects of the physical length settings of the first stub and the second stub are the same as those described above and will not be elaborated here. In addition, the physical length of the third radiator is 5 mm to 10 mm so that the third radiator can generate a second resonance of the second communication frequency band.

[0039] In another aspect of the present application, a wireless headset is provided, which may include an ear bag, an ear handle and an antenna structure. The ear handle is arranged along a first direction, and one end of the ear handle facing the ear bag is connected to the ear bag. The antenna structure is arranged in the ear handle, and the antenna structure includes a first radiator, a feeding end and a third radiator. The feeding end is arranged on the first radiator, and the feeding end divides the first radiator into a first branch and a second branch, and a part of the first branch along the first direction and a part of the second branch along the first direction are arranged opposite to each other. The third radiator is arranged on the side of the first radiator away from the ear bag along the second direction; the first direction and the second direction intersect. The grounding end is arranged on the third radiator. Among them, the first branch is used to generate a first resonance in the first communication frequency band; the second branch is used to generate a second resonance in the second communication frequency band, and the third radiator is used to generate a second resonance in the second communication frequency band. Any frequency in the second communication frequency band is greater than any frequency in the first communication frequency band. The technical effects of the wireless headset are the same as described above and will not be repeated here.

[0040] In an optional implementation, the electrical length of the first branch is 1 / 4 wavelength of the first communication frequency band, the electrical length of the second branch is 1 / 4 wavelength of the second communication frequency band, and the electrical length of the third radiator is 1 / 4 wavelength of the second communication frequency band. The technical effects of the electrical lengths of the first branch, the second branch, and the third radiator are the same as described above and will not be repeated here.

[0041] In one aspect of the present application, a wireless headset is provided, which may include an ear bag, an ear handle and an antenna structure. The ear handle is arranged along a first direction, and one end of the ear handle facing the ear bag is connected to the ear bag. The antenna structure is arranged in the ear handle, and the antenna structure includes a first radiator and a feeding end. The feeding end is arranged on the first radiator, and the feeding end divides the first radiator into a first branch and a second branch. A portion of the first branch along the first direction and a portion of the second branch along the first direction are arranged oppositely, and the first branch has an open end on the side away from the ear bag. The portion from the feeding end to the open end in the first branch includes a first part, a second part and a third part in sequence, the first part has a first line width S1, the second part has a second line width S2, and the third part has a third line width S3, S1<S2, S3<S1. Among them, the first branch is used to generate a first resonance in a first communication frequency band, and the first branch is also used to generate a second resonance in a second communication frequency band, and the second branch is used to generate a second resonance in the second communication frequency band, and any frequency in the second communication frequency band is greater than any frequency in the first communication frequency band. In the case where the electric field strength point is equivalent to capacitive loading, in order to generate the second resonance of the second communication frequency band in the first branch, the line width of the part located at the current zero point in the first branch can be widened to form the second part. In addition, in the case where the current strength point can be equivalent to inductive loading, in order to generate the second resonance of the second communication frequency band in the first branch, the line width of the part located at the current strength point in the first branch can be reduced to form the third part. In this way, by the same token, the wireless headset with the above antenna structure can cover the first communication frequency band (for example, the frequency band where 2.4GHz is located), and can also cover the second communication frequency band (including the 5GL band and the 5GH band), so that the communication frequency band between the wireless headset and the mobile terminal can be switched according to the environment in which the user is located. For example, when the surrounding environment interference noise is large, it is switched to the second communication frequency band (for example, the 5GL band and the 5GH band) to support high-definition communication.

[0042] In an optional embodiment, the first branch is an L-shaped branch, and the first branch includes a first strip-shaped portion and a second strip-shaped portion, the first strip-shaped portion is arranged along a first direction, the second strip-shaped portion is arranged along a second direction, and the second direction intersects with the first direction. The first strip-shaped portion, the second strip-shaped portion and the second branch are connected in sequence; the second strip-shaped portion is located on the side of the first strip-shaped portion facing the ear bag. The second branch is a strip-shaped branch, and is arranged along the first direction. The second branch and the first strip-shaped portion are arranged opposite to each other. The feeding end is located on the side of the second branch facing the second strip-shaped portion. The technical effect of the above-mentioned feeding end setting position can be obtained in the same way, and will not be repeated here.

[0043] In an alternative embodiment, the second stub is an L-shaped stub. The second stub includes a third strip portion and a fourth strip portion. The third strip portion is arranged along the second direction, and the fourth strip portion is arranged along the first direction. The second direction intersects the first direction. The first stub, the third strip portion, and the fourth strip portion are connected in sequence. At least a part of the first stub along the first direction is disposed opposite to the fourth strip portion. The feeding end is on the side of the third strip portion facing the first stub. The technical effects of the above feeding end setting position can be obtained by the same reasoning and will not be elaborated here.

[0044] In an alternative embodiment, there is a third spacing H3 between the portion of the first stub arranged along the first direction and the portion of the second stub arranged along the first direction, where H3≥0.5mm. The technical effects of the third spacing H3 are the same as those described above and will not be elaborated here.

[0045] In an alternative embodiment, the electrical lengths of the first part, the second part, and the third part are all 1 / 4 wavelength of the second communication band, and the electrical length of the first stub is 1 / 4 wavelength of the first communication band. In this way, while the first stub can generate a first resonance in the first communication band, the first stub can also generate a second resonance in the second communication band. In addition, the electrical length of the second stub is 1 / 4 wavelength of the second communication band, which can enable the second stub to generate a second resonance in the second communication band.

[0046] In an alternative embodiment, the second communication band is divided into a first sub-communication band and a second sub-communication band, and the first communication band does not overlap with the second sub-communication band. The 1 / 4 wavelength common mode of the first stub is used to operate in the first communication band, and the 3 / 4 wavelength common mode of the first stub is used to operate in the first sub-communication band. The 1 / 4 wavelength common mode of the second stub is used to operate in the second sub-communication band. The technical effects of the above first sub-communication band and second sub-communication band are the same as those described above and will not be elaborated here.

[0047] In another aspect of the present application, there is provided an electronic device, including a charging device and at least one wireless earphone as described above. The wireless earphone is electrically connected to the charging device. The technical effects of this electronic device are the same as those of the above wireless earphone and will not be elaborated here. Description of the Drawings

[0048] Figure 1A is a schematic structural diagram of an electronic device provided by an embodiment of the present application;

[0049] Figure 1B is Figure 1A a schematic structural diagram of the wireless earphone in

[0050] Figure 2 is a cross-sectional view taken along A1-A2 in Figure 1B ;

[0051] Figure 3 Schematic diagram of a user wearing wireless earphones provided by an embodiment of the present application;

[0052] Figure 4 Schematic diagram of a structure of the wireless earphones provided by an embodiment of the present application;

[0053] Figure 5 Another schematic diagram of a structure of the wireless earphones provided by an embodiment of the present application;

[0054] Figure 6 is Figure 5 Schematic diagram of a structure of the antenna structure shown;

[0055] Figure 7 is Figure 5 Another schematic diagram of a structure of the antenna structure shown;

[0056] Fig. 8A is Figure 5 Another schematic diagram of a structure of the antenna structure shown;

[0057] Figure 8B is Figure 5 Another schematic diagram of a structure of the antenna structure shown;

[0058] Fig. 9 is Figure 5 S11 curve graph of the antenna structure shown;

[0059] Fig.10 in (a), Fig.10 in (b) and Fig.10 in (c) are respectively current distribution diagrams under different antenna modes provided by an embodiment of the present application;

[0060] Fig.11 is Figure 5 Antenna efficiency graph of the antenna structure shown;

[0061] Fig.12 is Figure 5 Another S11 curve graph of the antenna structure shown;

[0062] Fig.13 is Figure 5 Current distribution diagram of an antenna mode of the antenna structure shown;

[0063] Fig.14 Schematic diagram of the defect angle of an antenna pattern provided by an embodiment of the present application;

[0064] Fig.15 in (a), Fig.15(b) in this is an example of different three-dimensional antenna patterns provided by the embodiments of the present application;

[0065] Fig.16 (a) in Fig.16 (b) in this are another examples of different three-dimensional antenna patterns provided by the embodiments of the present application;

[0066] Fig.17 is a schematic diagram of another user wearing wireless earphones provided by the embodiments of the present application;

[0067] Fig.18 (a) in this is a state of the user's head, Fig.18 (b) in this is Fig.18 the omnidirectional pattern matching the head state of (a) in this;

[0068] Fig.19 (a) in this is another state of the user's head, Fig.19 (b) in this is Fig.19 the omnidirectional pattern matching the head state of (a) in this;

[0069] Fig. 20 (a) in this is another state of the user's head, Fig. 20 (b) in this is Fig. 20 the omnidirectional pattern matching the head state of (a) in this;

[0070] Fig.21 is another schematic diagram of the structure of the wireless earphones provided by the embodiments of the present application;

[0071] Fig.22A is Fig.21 a schematic diagram of the structure of the antenna structure shown in;

[0072] Fig. 22B is Fig.21 a schematic diagram of the structure of the antenna structure shown in;

[0073] Fig.23 is Fig.21 another schematic diagram of the structure of the antenna structure shown in;

[0074] Fig.24A is Fig.21 another schematic diagram of the structure of the antenna structure shown in;

[0075] Fig. 24B is Fig.21 another schematic diagram of the structure of the antenna structure shown in;

[0076] Fig.25A is Fig.21 an S11 curve graph of the antenna structure shown in;

[0077] Fig.25B Another S11 curve graph for the antenna structure shown Fig.21 ;

[0078] Fig.26 (a) in Fig.26 (b) in Fig.26 and (c) in

[0079] Fig.27A are respectively the current distribution graphs under different antenna modes provided by the embodiments of the present application Fig.21 An antenna efficiency graph for the antenna structure shown

[0080] Fig.27B Another antenna efficiency graph for the antenna structure shown Fig.21 ;

[0081] Fig.28 (a) in Fig.28 (b) in

[0082] Fig.29 are respectively another example of different three-dimensional antenna patterns provided by the embodiments of the present application

[0083] Fig.30 Another schematic structural diagram of the wireless earphone provided by the embodiment of the present application Fig.29 A schematic structural diagram for the antenna structure shown

[0084] Fig.31 Another schematic structural diagram for the antenna structure shown Fig.29 ;

[0085] Fig.32 Another schematic structural diagram for the antenna structure shown Fig.29 ;

[0086] Fig.33A Another S11 curve graph for the antenna structure shown Fig.29 ;

[0087] Fig.33B Another S11 curve graph for the antenna structure shown Fig.29 ;

[0088] Fig.34 (a) in Fig.34 (b) in Fig.34 and (c) in

[0089] Fig.35A are respectively the current distribution graphs under different antenna modes provided by the embodiments of the present application Fig.29 An antenna efficiency graph for the antenna structure shown

[0090] Fig.35B For Fig.29 an antenna efficiency diagram of the antenna structure shown;

[0091] Fig.36 Another schematic diagram of the wireless earphone provided by the embodiment of the present application;

[0092] Fig.37 Another schematic diagram of the wireless earphone provided by the embodiment of the present application;

[0093] Fig.38A For Fig.37 an S11 curve diagram of the antenna structure shown;

[0094] Fig.38B For Fig.37 another S11 curve diagram of the antenna structure shown;

[0095] Fig.39 (a) in Fig.39 (b) in Fig.39 and (c) in are respectively current distribution diagrams under different antenna modes provided by the embodiment of the present application;

[0096] Fig.40 For Fig.37 a schematic diagram of the antenna structure shown;

[0097] Fig.41 For Fig.37 an antenna efficiency diagram of the antenna structure shown;

[0098] Fig.42 (a) in Fig.42 (b) in are respectively another example of different three-dimensional antenna radiation patterns provided by the embodiment of the present application;

[0099] Fig.43 For Fig.37 another schematic diagram of the antenna structure shown;

[0100] Fig.44 For Fig.37 another schematic diagram of the antenna structure shown.

[0101] Reference numerals:

[0102] 01 - Electronic device; 02 - Wireless earphone; 03 - Charging device; 10 - Ear cup; 11 - Ear stem; 101 - Speaker; 102 - Battery; 112 - Circuit board; 20 - Antenna structure; 110 - Circuit board; 111 - Elastic sheet; 03 - Human face; 200 - Radiator; 201 - First radiator; 211 - First branch; 212 - Second branch; 202 - Second radiator; 2111 - First strip portion; 2112 - Second strip portion; 2123 - Third strip portion; 2124 - Fourth strip portion; 2115 - Fifth strip portion; 31 - First impedance network; 32 - Second impedance network; 203 - Third radiator; 21101 - First part; 21102 - Second part; 21103 - Third part. Detailed implementation

[0103] The following will describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. When describing a single component, device or system, multiple such components, devices or systems can perform related functions. For example, one or more processors can perform the function descriptions related to a single processor.

[0104] Hereinafter, terms such as "first" and "second" are only for convenience of description and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality" is two or more.

[0105] The such limitations as parallel, perpendicular, orthogonal, identical (for example, the same length, the same width, etc.) mentioned in the embodiments of the present application are all in terms of the current process level, rather than the absolutely strict definitions in the mathematical sense. There may be a deviation of a predetermined angle between two components that are parallel or perpendicular to each other. In one embodiment, the predetermined threshold may be less than or equal to a threshold of 1 mm. For example, the predetermined threshold may be 0.5 mm, or may be 0.1 mm. In one embodiment, the predetermined angle may be an angle within the range of ±10°, for example, the predetermined angle deviation is ±5°.

[0106] In this application, unless otherwise clearly specified and defined, the term "connection" shall be understood in a broad sense. For example, "connection" can be a fixed mechanical connection, a detachable mechanical connection, or an integral one; or, "connection" can be a direct connection or an indirect connection through an intermediate medium. In addition, unless otherwise clearly specified and defined, the term "coupling" shall be understood in a broad sense. For example, "coupling" can be a direct electrical connection. For example, there is physical contact and electrical conduction between two components, and it can also be understood that in a circuit structure, different components are electrically connected through an entity line such as a copper foil or a wire of a printed circuit board (PCB) that can transmit electrical signals for electrical signal transmission; or, "coupling" can be an indirect electrical connection between two components through an intermediate medium; or, "coupling" can be an electrical connection between two components in a non-contact manner through air, for example, two components are electrically connected by means of capacitive coupling for electrical signal transmission.

[0107] In the embodiments of this application, orientation terms such as "upper", "lower", "left", and "right" may include but are not limited to those defined relative to the schematic placement of components in the drawings. It should be understood that these directional terms can be relative concepts, and they are used for relative description and clarification, and they can change accordingly with the change of the orientation of the components placed in the drawings.

[0108] In the drawings of the embodiments of this application, components are represented by guiding lines with arrows; parts are only represented by guiding lines; openings such as openings and holes are represented by guiding lines with wavy lines at the ends.

[0109] The technical solutions provided by the embodiments of this application are applicable to electronic devices that adopt one or more of the following communication technologies. The above communication protocols may include: Bluetooth (BT) communication technology, Global Positioning System (GPS) communication technology, Global System of Mobile Communication (GSM) communication technology, Wireless Fidelity (WiFi) communication technology, Wideband Code Division Multiple Access Wireless (WCDMA) communication technology, Long Term Evolution (LTE), 5G communication technology, and other future communication technologies. The electronic devices in the embodiments of this application may be smart wearable devices. For example, in-ear wireless headphone devices, ear-hook headphones, over-ear wireless headphone devices, etc. The electronic device may also be a handheld device with wireless communication function, a computing device, or other processing devices connected to a wireless modem, a vehicle-mounted device, an electronic device in a 5G network, or an electronic device in a future evolved Public Land Mobile Network (PLMN). The embodiments of this application do not limit this.

[0110] For the convenience of description below, Figure 1A the following takes the electronic device 01 shown in Figure 1A as an in-ear wireless headphone device as an example for illustration. For example, as Figure 1A shown, the above electronic device 01 may include at least one wireless headphone 02 and a charging device 03. The wireless headphone 02 may be a True Wireless Stereo (TWS) headphone.

[0111] For example, Figure 1A as shown, the above charging device 03 may be a headphone charging case. When the wireless headphone 02 needs to be charged, the wireless headphone 02 may be located in the charging device 03 along the Figure 1A arrow direction shown and electrically connected to the charging device 03 so that the charging device 03 can charge the wireless headphone 02. The above takes the wireless headphone 02 located in the charging device 03 to achieve charging as an example for illustration. In some other embodiments of this application, the wireless headphone 02 may also be located outside the charging device 03. This application does not limit this.

[0112] In some embodiments of the present application, Figure 1B As shown, the wireless headset 02 may include an ear bag 10 and an ear handle 11, and the ear handle 11 is connected to the ear bag 10 so that the storage space in the ear handle 11 is connected to the storage space in the ear bag 10. In this case, after the ear bag 10 and the ear handle 11 are connected to form an integrated structure, the integrated structure can be used as the shell of the wireless headset 02, and the shell can be made of non-conductive material, such as resin material. In addition, Figure 2 (along Figure 1B As shown in the cross-sectional view obtained by cutting along A1-A2 in the figure, the wireless headset may further include a speaker 101 and a battery 102 located in the ear bag 10, a circuit board (e.g., PCB) 110 located in the ear handle 11, an antenna structure 20, a spring 111 for electrically connecting the antenna structure 20 to the circuit board 110, and a microphone assembly (not shown in the figure), etc.

[0113] The ear bag 10 refers to the main part of the wireless headset 02, which is used to accommodate the speaker 101 (it can also accommodate the battery 102, or at least part of the circuit board 110), etc., and is used to fit the user's auricle when the user wears the wireless headset 02 (it can be called a non-in-ear ear bag), or is partially placed in the user's auricle or ear canal (it can be called an in-ear ear bag). The ear handle 11 can refer to the main part of the wireless headset 02, which is used to accommodate the microphone component (it can also accommodate at least part of the circuit board 110, the antenna structure 20, or the battery 102), etc., and does not need to fit the user's auricle or be placed in the user's auricle or ear canal when the user wears the wireless headset 02.

[0114] Based on this, continue as Figure 2 As shown, the battery 102 can be electrically connected to the circuit board 110 and the speaker 101, the battery 102 can supply power to the speaker 101, and the battery 102 can also serve as a feed source for the antenna structure 20. On this basis, when the user wears the above wireless headset 02, Figure 3 As shown, the ear bag 10 portion of the wireless headset 02 can be located inside the ear hole of the user, and the ear handle 11 portion can be located outside the ear hole of the user.

[0115] In order to facilitate the description of the positional relationship of the various components in the wireless headset 02, in the accompanying drawings, Figure 2 As shown in FIG. 1 , an XYZ coordinate system is established. The first direction Z is the extension direction of the ear handle 11. Along the first direction Z, one end of the ear handle 11 facing the ear bag 10 is connected to the ear bag 10, that is, the first direction Z can be the same as the height direction of the ear handle 11. The second direction Y is the width direction of the ear handle 11. The ZY plane (as shown in FIG. 1 ) is the width direction of the ear handle 11. Figure 3The third direction X is the stacking direction of the antenna structure 20, the circuit board 110, the battery 102 and the speaker 101, that is, the third direction X can be the same as the thickness direction of the ear handle 11. Among the first direction Z, the second direction Y and the third direction X, any two directions can intersect (for example, be perpendicular).

[0116] On this basis, it can be seen from the above that the wireless headset 02 may include: Figure 2 The antenna structure 20 shown. The antenna structure 20 may include Figure 4 As shown, a radiator 200 for receiving / sending electromagnetic wave radiation can be made of metal material. In some cases, the "antenna" is understood in a narrow sense as the radiator 200, which can convert the waveguide energy from the transmitter into radio waves, or convert the radio waves into waveguide energy, which is used to radiate and receive radio waves. For example, the above-mentioned wireless headset may also include a transmitter and a receiver (not shown in the figure) arranged on a circuit board. Among them, the modulated high-frequency current energy (or waveguide energy) generated by the transmitter is transmitted to the radiator 200 via a feeder line, and is converted into a certain polarized electromagnetic wave energy by the radiator and radiated in the desired direction. Alternatively, the radiator 200 converts a certain polarized electromagnetic wave energy from a specific direction in space into a modulated high-frequency current energy, which is transmitted to the input end of the receiver via a feeder line.

[0117] For example, the radiator 200 in the antenna structure 20 can be an antenna based on a flexible printed circuit (FPC), or an antenna based on laser direct structuring (LDS), or an antenna based on a micro strip disk antenna (MDA), etc., and the present application does not limit this. Taking the LDS antenna form as an example, in some embodiments of the present application, the wireless headset 02 can also include the following Figure 4 The antenna bracket 112 shown, the radiator 200 in the antenna structure 20 can be made on the antenna bracket 112 by the above-mentioned LDS process. The above-mentioned antenna bracket 112 can be made of non-conductive material. Alternatively, in other embodiments, the wireless headset 02 does not need to be provided with the above-mentioned antenna bracket 112, and is formed on other components in the wireless headset 02 by the LDS process, such as the inner wall of the ear handle 11, and the present application does not limit this. For the convenience of explanation below, the radiator 200 is set on the antenna bracket 112 as an example.

[0118] in, Figure 4This is only an example of setting the radiator 200 on the antenna bracket 112, and does not constitute a limitation on the specific structure of the radiator 200.

[0119] Based on this, in order to enable the wireless earphone 02 to obtain a high sound quality in a surrounding environment with strong interference noise, the following is an example of the setting method of the antenna structure 20 in the wireless earphone 02. In some embodiments of the present application, the radiator 200 in the above antenna structure 20 (such as Figure 2 shown) may include a first radiator 201 and a second radiator 202 as shown in Figure 5 shown. In addition, the above antenna structure 20 may further include a feeding end F and a grounding end G.

[0120] On this basis, the feeding end F may be disposed on the first radiator 201, and the feeding end F may divide the first radiator 201 into a first branch 211 and a second branch 212. The first radiator 201 has opposite first end a1 and second end b1. In the first radiator 201, the portion between the first end a1 and the feeding end F may serve as the above first branch 211. In the first radiator 201, the portion between the feeding end F and the second end b1 of the first radiator 201 may serve as the above second branch 212.

[0121] Exemplarily, the first branch 211 and the second 212 may be asymmetrically disposed with respect to the feeding end F, that is, the physical lengths of the first branch 211 and the second branch 212 may not be equal. In addition, the side of the first branch 211 facing away from the ear cup 10 (such as Figure 2 shown) (that is, the lower side of the first branch 211) has an open end, that is, the first end a1 of the first radiator 201 is an open end.

[0122] Among them, in some embodiments, the open end / closed end is relative to whether it is grounded. The closed end is grounded, and the open end is not grounded. In some other embodiments, the open end / closed end is relative to other conductive bodies. The closed end is electrically connected to other conductive bodies, and the open end is not electrically connected to other conductive bodies. In one embodiment, the open end may also be referred to as a free end, an open end, or an open circuit end. In one embodiment, the closed end may also be referred to as a grounding end or a short circuit end. It should be understood that in some embodiments, other conductive bodies can be coupled and connected through the open end to transfer coupled energy (which can be understood as transferring current).

[0123] Exemplarily, a feeding circuit may be disposed on the circuit board 110, and the feeding end F may be electrically connected to the feeding circuit on the circuit board 110 through the Figure 4 shown elastic sheet 111, so that a feeding source, such as a battery 102 (such as Figure 4 shown) can feed power to the feeding end F through the feeding circuit on the circuit board 110.

[0124] In addition, continuing as shown in Figure 5 shown, a part of the first branch 211 along the first direction Z and a part of the second branch 212 along the first direction Z are oppositely arranged. In this case, as shown in Figure 6 shown, taking the projection of the ear handle 11 on the ZY plane as a rectangle as an example, the ear handle 11 can have two long sides L1 arranged oppositely along the first direction Z, and the ear handle 11 can have two short sides L2 arranged oppositely along the second direction Y. The fact that a part of the first branch 211 along the first direction Z and a part of the second branch 212 along the first direction Z are oppositely arranged may mean that at least a part of the first branch 211 can be arranged along one long side L1 of the ear handle 11, and at least a part of the second branch 212 can be arranged along the other long side L1 of the ear handle 11. In this way, the first radiator 201 can be arranged around the edge of the ear handle 11, so that other components in the wireless earphone 02 can be arranged in the area surrounded by the first radiator 201, improving the space utilization rate of the middle position inside the ear handle 11 and reducing the occupied space of the antenna structure 20.

[0125] In addition, continuing as shown in Figure 6 shown, the second radiator 202 can be arranged along the first direction Z on the side of the second branch 212 away from the ear cup 10 (as shown in Figure 2 shown), that is, the lower side of the second branch 212. In this case, the second radiator 202 can be located below the second branch 212. Since the feeding end F is arranged on the second radiator 202, the feeding end F can be located above the second radiator 202, so that the feeding end F can be close to the Figure 3 ear cup 10 in. As can be seen from the above, as shown in Figure 2 shown, in an embodiment, a speaker 101 and a battery 102 are arranged in the ear cup 10, and the outer contour of the ear cup 10 on the side facing the speaker includes an arc as shown in Figure 3 shown. In addition, as shown in Figure 2 shown, in an embodiment, a circuit board 110 and an antenna structure 20 are arranged in the ear handle 11, and the cross section of the ear handle 11 can be as shown in Figure 3The elongated shape shown. The diameter or thickness of the earcup 10 can be greater than the thickness of the earstem 11. In this way, when the user wears the wireless earphone 02, by arranging the feeding end F close to the earcup 10, the feeding end F can be located at the upper end of the earstem 11. There can be the above-mentioned circuit board 110, as well as the speaker 101 and the battery 102 in the earcup 10 between the feeding end F and the human face 03. Therefore, compared with the solution of arranging the feeding end F at the lower end of the earstem 11 (with the circuit board 110 spaced between the feeding end F and the human face 03), the distance between the feeding end F and the human face 03 can be made larger, and the feeding end F is arranged further away from the human face 03, so as to avoid the absorption of the feeding signal by the human body and improve the utilization rate of the signal.

[0126] In addition, continue as Figure 6 shown, there can be a gap S between the second radiator 202 and the second stub 212. The grounding end G can be arranged on the second radiator 202. Exemplarily, the grounding end G can be arranged at the end of the second radiator 202 facing away from the second stub 212. Or, it can be arranged at any position on the second radiator 202 according to the electrical length requirement of the second radiator 202. Among them, the closer the position of the grounding end G is to the end of the second radiator 202 facing away from the second stub 212, the longer the electrical length of the second radiator 202, and vice versa.

[0127] Based on this, the above-mentioned wireless earphone 02 can include a floor (not shown in the figure) arranged in the earstem 11, and the feeding end G can be coupled to the floor so that the second radiator 202 can be grounded. As can be seen from the above, there is a gap S between the second stub 212 and the second radiator 202, so the second stub 212 and the second radiator 202 can form a slot antenna.

[0128] Among them, the gap S between the second stub 212 and the second radiator 202 can be the minimum distance between the end of the second stub 212 facing the second radiator 202 and the end of the second radiator 202 facing the second stub 212. Or, the gap S can also be the average distance between the end of the second stub 212 facing the second radiator 202 and the end of the second radiator 202 facing the second stub 212. The structure of the gap S is not limited in this application, as long as it can ensure that the second stub 212 and the second radiator 202 can form a slot antenna.

[0129] In some embodiments of the present application, the width H0 of the above-mentioned gap S may be between 0.4 mm and 1 mm. For example, when the width H0 of the gap S between the second stub 212 and the second radiator 202 is less than 0.4 mm, the size of the gap S is small, and the requirement for processing accuracy is high. Or, for another example, when the width H0 of the gap S between the second stub 212 and the second radiator 202 is greater than 1 mm, the coupling effect between the second stub 212 and the second radiator 202 will be reduced, making it difficult for the second stub 212 and the second radiator 202 to form a slot antenna. Exemplarily, the width H0 of the gap S may be 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm or 1 mm.

[0130] In order to enable a gap S to be formed between the second radiator 202 and the second stub 212, the second radiator 202 may be arranged along the long side L1 of the earpiece 11. In this case, the second radiator 202 and the part of the second stub 212 arranged along the first direction Z may be arranged close to the same long side L1 of the earpiece 11. Similarly, the second radiator 202 may also be arranged at the edge of the earpiece 11 to improve the space utilization rate at the middle position inside the earpiece 11.

[0131] In some embodiments of the present application, the floor (or ground) coupled to the above-mentioned ground terminal G may generally refer to at least a part of any ground layer, ground plane, or ground metal layer in the wireless earphone 02, or at least a part of any combination of the above-mentioned ground layer, ground plane, or ground component. The above-mentioned floor (or ground) may include any one or more of the following: the ground layer in the circuit board 110 of the wireless earphone 02 (as Figure 5 shown), the ground metal layer formed by a metal thin film laminated with the antenna structure 20, the conductive ground layer of the battery 102 (as Figure 2 shown), and the conductive member or metal member electrically connected to the above-mentioned ground layer / ground plane / ground metal layer. Any of the above-mentioned ground layer, ground plane, or ground metal layer is made of a conductive material. In one embodiment, the conductive material may be any one of the following materials: copper, aluminum, stainless steel, brass and their alloys, copper foil on an insulating substrate, aluminum foil on an insulating substrate, gold foil on an insulating substrate, silver-plated copper, silver-plated copper foil on an insulating substrate, silver foil on an insulating substrate, and tin-plated copper, cloth impregnated with graphite powder, substrate coated with graphite, copper-plated substrate, brass-plated substrate, and aluminum-plated substrate. Those skilled in the art can understand that the ground layer / ground plane / ground metal layer can also be made of other conductive materials. It should be understood that the floor may have a regular or irregular shape, and the present application does not limit this. For the convenience of description below, the above-mentioned floor is taken as the ground layer in the circuit board 110 (as Figure 5 shown) as an example for description.

[0132] On this basis, Figure 5 When the ground end G in the antenna structure 20 shown is coupled to the ground layer in the circuit board 110, the grounding (GND) of the first radiator 201 can be achieved. Herein, grounding means coupling to the above-mentioned floor (for example, the ground layer in the circuit board 110) in any way. In some embodiments, grounding can be physical grounding, for example, physical grounding at a specific position on the first radiator 201 is achieved through some structural members of the first radiator 201 (or referred to as, physical ground). In some embodiments, grounding can be device grounding, for example, grounding through devices such as series or parallel capacitors / inductors / resistors (or referred to as, device ground). The above-mentioned series or parallel capacitors / inductors / resistors, etc. can be referred to as an impedance network, and this impedance network can perform at least one of impedance matching and filtering on the antenna.

[0133] Among them, the impedance of an antenna generally refers to the ratio of the voltage to the current at the input end of the antenna. Antenna impedance is a measure of the resistance of the antenna to electrical signals. The main purpose of antenna impedance matching is to achieve the matching between the antenna and the transmission line. When the antenna is matched with the transmission line, the power transmitted from the transmitter to the antenna or from the antenna to the receiver is the largest. At this time, there will be no reflected wave on the transmission line, the reflection coefficient is equal to zero, and the standing wave ratio is equal to 1. The quality of the matching between the antenna and the transmission line is measured by the magnitude of the reflection coefficient or the standing wave ratio at the input end of the antenna. For a transmitting antenna, if the matching is not good, the radiation power of the antenna will decrease, the loss on the transmission line will increase, the power capacity of the transmission line will also decrease, and in severe cases, the phenomenon of "frequency pulling" of the transmitter will occur, that is, the oscillation frequency changes.

[0134] The capacitor in the embodiments of the present application can be understood as lumped capacitance and / or distributed capacitance. Lumped capacitance refers to capacitive components, such as capacitor elements; distributed capacitance (or distributed capacitor) refers to the equivalent capacitance formed by two conductive members with a certain gap. Inductance can be understood as lumped inductance and / or distributed inductance. Lumped inductance refers to inductive components, such as inductor elements; distributed inductance (or distributed inductance) refers to the equivalent inductance formed by a conductive member of a certain length, such as the equivalent inductance formed by a conductor due to curling or rotation.

[0135] In addition, in some embodiments, there is a certain distance between the above-mentioned floor (for example, the ground layer in the circuit board 110) and the radiator 200 (as Figure 4 shown) to provide a radiation clearance for the radiator 200. For example, as Figure 5As shown, along the third direction X, the spacing between the floor (e.g., the ground layer in the circuit board 110) and the radiator 200 can be about 1.7 mm. In some embodiments, a coupling structure can be provided between the floor and the radiator (e.g., at least one of the first radiator 201 or the second radiator 202 described above) to provide grounding for the radiator. It should be understood that the radiator is used to form an antenna, which can operate in different antenna modes; when a relatively large floor current is excited in this antenna mode, the shape and size of the floor will greatly affect the performance of this antenna mode; when a relatively small floor current is induced in this antenna mode, the shape and size of the floor will basically not affect the performance of this antenna mode.

[0136] On this basis, as Figure 6 shown, the above-mentioned feeding end F can be regarded as a section of the radiator (e.g., at least one of the first radiator 201 or the second radiator 202 described above) that is coupled to the floor in the circuit board 110. Similarly, the grounding end G can be regarded as a section of the radiator (e.g., at least one of the first radiator 201 or the second radiator 202 described above) that is coupled to the feeding circuit (not shown in the figure) in the circuit board 110. The above-mentioned "end" cannot be narrowly understood as necessarily being an end point or end part that is physically disconnected from other radiators, but can also be regarded as a certain point or a certain section on the continuous radiator. In one embodiment, the "end" can include a coupling area on the radiator that couples to other conductive structures. For example, the feeding end can be an area on the radiator that couples to or is coupled and connected to a part of the feeding circuit (e.g., an area facing a part of the feeding circuit).

[0137] The following is an example of the setting method of the feeding end F and the grounding end G. In some embodiments of the present application, the feeding end F and the grounding end G are arranged on the same long side L1 of the earpiece 11. In this case, as Figure 7 shown, the first branch 211 can be an L-shaped branch, and the first branch 211 can include a first strip portion 2111 and a second strip portion 2112. The first strip portion 2111 is arranged along the first direction Z, and the second strip portion 2112 is arranged along the second direction Y. The first strip portion 2111, the second strip portion 2112, and the second branch 212 are connected in sequence to form the above-mentioned first radiator 201.

[0138] Among them, the second strip portion 2112 can be located on the side of the first strip portion 2111 facing the earcup 10 (as Figure 2 shown), that is, the second strip portion 2112 is located at the upper end of the first strip portion 2111. In addition, the second branch 212 can be a strip branch, and the second branch 212 is arranged along the first direction Z. The second branch 212 and the first strip portion 2111 are arranged opposite to each other. For example, as can be seen from the above, continuing as Figure 7As shown, the ear handle 11 may have two opposite long sides L1 along the first direction Z, and the ear handle 11 may have two opposite short sides L2 along the second direction Y, and the length of the long side L1 is greater than the length of the short side L2. The second branch 212 is arranged along the long side L1 on the left side of the ear handle 11, and the first strip portion 2111 is arranged along the long side L1 on the right side of the ear handle 11. Similarly, in this way, the first radiator 201 can be arranged around the edge of the ear handle 11, improving the space utilization rate of the middle position inside the ear handle 11.

[0139] Among them, Figure 7 Taking the first strip portion 2111 and the second strip portion 2112 in the first branch 211, and the second branch 212 and the second radiator 202 as strip branches with uniform line widths as examples for illustration. The present application does not limit the line widths of the above strip branches. When the internal space of the ear handle 11 permits, the line widths of the above strip branches can be appropriately increased to achieve the purpose of increasing the radiation aperture of the radiator. The line widths of the above strip branches in the example can be about 3 mm. The setting methods of the line widths of the strip branches in the following embodiments can be obtained in the same way and will not be elaborated one by one.

[0140] In addition, the physical length of the first strip portion 2111, that is, the length A1 of the first strip portion 2111 along the first direction Z, can be greater than the physical length of the second strip portion 2112, that is, the length A2 of the second strip portion 2112 along the second direction Y, that is, A1 > A2. In this way, the first strip portion 2111 with a larger length in the first branch 211 can be arranged along the long side L1 of the ear handle 11, and the second strip portion 2112 with a smaller length in the first branch 211 can be arranged along the short side L2 of the ear handle. When the first branch 211 is arranged around the edge of the ear handle 11, the internal space structure of the ear handle 11 can be reasonably utilized, thereby improving the space utilization rate of the middle position inside the ear handle 11.

[0141] Based on this, the above first branch 211 can be used as a wire antenna to generate the first resonance of the first communication frequency band f1, and the resonance frequency of the first resonance is located in the first communication frequency band f1. The slot antenna formed by the second branch 212 and the second radiator 202 is used to generate the second resonance of the second communication frequency band f2, and the resonance frequency of the second resonance can be located in the second communication frequency band f2. Among them, any frequency in the second communication frequency band f2 is greater than any frequency in the first communication frequency band f1.

[0142] Among them, the resonant frequency is also called the resonance frequency. The resonant frequency can have a frequency range, that is, the frequency range where resonance occurs. The resonant frequency can be the frequency range where the return loss characteristic is less than -6 dB. The frequency corresponding to the strongest resonance point is the center frequency point. The return loss characteristic of the center frequency can be less than -20 dB. It should be understood that if there is no additional description, the "first resonance" or "second resonance" generated by the radiator mentioned in this application can be the fundamental mode resonance generated by the radiator, or rather, the resonance with the lowest frequency generated by the radiator. It should be understood that the radiator can generate one or more antenna modes according to specific designs, and each antenna mode can correspondingly generate a fundamental mode resonance.

[0143] In addition, when the radiator in the antenna structure 20 (for example, at least one of the above-mentioned first radiator 201 or second radiator 202) meets certain index requirements, it will operate within a certain frequency range, and the above-mentioned frequency range can be called the communication frequency band, and the width of the communication frequency band is called the bandwidth. The bandwidth can be considered as a frequency range on both sides of the center frequency (for example, the resonant frequency of the radiator), where the antenna characteristics are within the acceptable value range of the center frequency.

[0144] Exemplarily, the above-mentioned first communication frequency band f1 can be the frequency band where 2.4 GHz of Bluetooth is located (for example, 2400 MHz to 2480 MHz), and the second communication frequency band f2 can be the frequency band where 5 GHz of Bluetooth is located (for example, 5170 MHz to 5850 MHz). In some embodiments of this application, the above-mentioned second communication frequency band f2 can also be divided into a first sub-communication frequency band f21 (for example, 5170 MHz to 5330 MHz) and a second sub-communication frequency band f22 (for example, 5750 MHz to 5850 MHz). In this case, the first sub-communication frequency band f21 can be called the 5G low (L) band, abbreviated as 5GL, and the second sub-communication frequency band f22 can be called the 5G high (H) band, abbreviated as 5GH. Any frequency in the first sub-communication frequency band f21 can be less than any frequency in the second sub-communication frequency band f22.

[0145] Or, the range of the first sub-communication frequency band f21 is 5750 MHz to 5850 MHz, and the first sub-communication frequency band f21 can be 5GH, the range of the second sub-communication frequency band f22 is 5170 MHz to 5330 MHz, and the second sub-communication frequency band f22 is 5GL. For the convenience of illustration below, the example is given with the first sub-communication frequency band f21 being 5GL and the second sub-communication frequency band f22 being 5GH.

[0146] On this basis, in order to make Figure 6The first stub 211 shown generates a first resonance at the first communication frequency band f1 as a wire antenna, and the slot antenna formed by the second stub 212 and the second radiator 202 generates a second resonance at the second communication frequency band f2. In some embodiments of the present application, the electrical length of the first stub 211 may be 1 / 4 wavelength of the first communication frequency band f1, and the electrical lengths of the second stub 212 and the second radiator 202 may be 1 / 4 wavelength of the second communication frequency band f2, respectively.

[0147] In addition, in some embodiments, the electrical length may be expressed as the ratio of the physical length (mechanical length or geometric length) multiplied by the transmission time of an electrical or electromagnetic signal in a medium to the time required for this signal to pass through the same distance as the physical length of the medium in free space. The electrical length may satisfy the following formula:

[0148]

[0149] Wherein, L is the physical length, a is the transmission time of the electrical or electromagnetic signal in the medium, and b is the transmission time in free space.

[0150] Alternatively, the electrical length may also be the ratio of the physical length (mechanical length or geometric length) to the wavelength of the transmitted electromagnetic wave. The electrical length may satisfy the following formula:

[0151]

[0152] Wherein, L is the physical length and λ is the wavelength of the electromagnetic wave.

[0153] In some embodiments of the present application, the physical length of the radiator can be understood to be within ±20%, or ±10%, or ±5% of the electrical length of the radiator.

[0154] Moreover, the wavelength in the embodiments of the present application generally refers to the dielectric wavelength, which may be the dielectric wavelength corresponding to the center frequency of the resonant frequency, or the dielectric wavelength corresponding to the center frequency of the communication frequency band supported by the antenna. Alternatively, not limited to the center frequency, the "dielectric wavelength" may also refer to the dielectric wavelength corresponding to a non-center frequency of the resonant frequency or the communication frequency band. It should be understood that the wavelength of the communication frequency band in the present application may be the wavelength range corresponding to all frequency points within the frequency range of the communication frequency band. For ease of understanding, the dielectric wavelength mentioned in the embodiments of the present application can be simply calculated by the relative dielectric constant of the medium filled on one side or multiple sides of the radiator.

[0155] The above is Figure 7 an example of the setting method of the feeding end F and the grounding end G with the feeding end F and the grounding end G shown on the same long side L1 of the earpiece 11. Alternatively, in some other embodiments of the present application, such as Fig. 8AAs shown, the feeding end F and the grounding end G can be respectively arranged close to two opposite long sides L1 of the ear stalk 11.

[0156] For example, continuing as Fig. 8A shown, the feeding end F is arranged close to the left long side L1 of the ear stalk 11, and the grounding end G is arranged close to the right long side L1 of the ear stalk 11. In this case, the second stub 212 can be an L-shaped stub, and the second stub 212 can include a third strip portion 2123 and a fourth strip portion 2124. The third strip portion 2123 is arranged along the second direction Y, and the fourth strip portion 2124 is arranged along the first direction Y. The first stub 211, the third strip portion 2123, and the fourth strip portion 2124 are connected in sequence to form the above-mentioned first radiator 201.

[0157] In addition, the third strip portion 2123 is located on the side of the fourth strip portion 2124 facing the ear cup 10 (as Figure 2 shown), that is, the third strip portion 2123 is located at the upper end of the fourth strip portion 2124. In addition, there is the above-mentioned gap S between the fourth strip portion 2124 and the second radiator 202. At least a part of the first stub 211 along the first direction Z can be arranged opposite to the fourth strip portion 2124. For example, at least a part of the first stub 211 along the first direction Z can be arranged along the left long side L1 of the ear stalk 11, and the fourth strip portion 2124 can be arranged along the right long side L1 of the ear stalk 11. Similarly, in this way, the first radiator 201 can be arranged around the edge of the ear stalk 11, improving the space utilization rate of the middle position inside the ear stalk 11.

[0158] The above is taking Figure 7 where the feeding end F and the grounding end G are arranged on the same side, Fig. 8A and the feeding end F and the grounding end G are arranged on opposite sides as examples for illustration. With the above two setting methods, since the third strip portion 2123 is located on the side of the fourth strip portion 2124 facing the ear cup 10, and the feeding end F is located on the third strip portion 2123, when the user wears the wireless earphone 02, the feeding end F can be arranged as Figure 3 shown, away from the user's face, so as to reduce the absorption of the feeding signal by the human body.

[0159] In addition, in some other embodiments of the present application, when the physical length of the part of the first stub 211 along the first direction Z cannot make the electrical length of the first stub 211 reach 1 / 4 wavelength of the first communication frequency band f1 (for example, the frequency band where 2.4 GHz is located), as Figure 8BAs shown, the first branch 211 may include a first strip portion 2111 and a fifth strip portion 2115. The first strip portion 2111 is arranged along the first direction Z, and the fifth strip portion 2115 is arranged along the second direction Y. Among them, the fifth strip portion 2115, the first strip portion 2111, and the second branch 212 (for example, including a third strip portion 2123 and a fourth strip portion 2124) are connected in sequence to form a first radiator 201. In this way, by providing the above-mentioned fifth strip 2115 to increase the overall physical length of the first branch 211, the electrical length of the first branch 211 reaches 1 / 4 wavelength of the first communication frequency band f1.

[0160] When the second branch 212 includes a third strip portion 2123 and a fourth strip portion 2124, the first strip portion 2111 and the fourth strip portion 2124 may be arranged oppositely. For example, the first strip portion 2111 and the fourth strip portion 2124 may be respectively arranged along two opposite long sides L1 of the earpiece 11. In addition, along the second direction Z, the fifth strip portion 2115 and the third strip portion 2123 may be arranged oppositely. For example, the fifth strip portion 2115 and the third strip portion 2123 may be respectively arranged along two opposite short sides L2 of the earpiece 11. Or, when the second branch 212 is a strip-shaped branch and the first branch 211 further includes a second strip portion 2112 as shown in Figure 7 As shown, the fifth strip portion 2115 may be arranged oppositely to the second strip portion 2112. Similarly, in this way, the first radiator 201 can be arranged around the edge of the earpiece 11, improving the space utilization rate at the middle position inside the earpiece 11.

[0161] In addition, the physical length of the first strip portion 2111, that is, the length A1 of the first strip portion 2111 along the first direction Z, may be greater than the physical length of the fifth strip portion 2115, that is, the length A5 of the fifth strip portion 2115 along the second direction Y, that is, A1 > A5. In this way, the first strip portion 2111 with a larger length in the first branch 211 can be arranged along the long side L1 of the earpiece 11, and the fifth strip portion 2115 with a smaller length in the first branch 211 can be arranged along the short side L2 of the earpiece. When the first branch 211 is arranged around the edge of the earpiece 11, the internal space structure of the earpiece 11 can be reasonably utilized, thereby improving the space utilization rate at the middle position inside the earpiece 11.

[0162] Based on this, as can be seen from the above, Figure 8BThe first stub 211 shown is used to generate a first resonance of the first communication frequency band f1. The slot antenna formed by the second stub 212 and the second radiator 202 is used to generate a second resonance of the second communication frequency band f2. When the first stub 211 includes a fifth strip portion 2115, since the fifth strip portion 2115 is arranged along the second direction Y, in order to avoid the distance between the fifth strip portion 2115 and the second radiator 202 being relatively close, thus affecting the antenna pattern of the slot antenna formed by the second stub 212 and the second radiator 202, there is a first spacing H1 between the end of the fifth strip portion 2115 facing away from the first strip portion 2111 and the end of the second radiator 202 facing away from the earphone housing (i.e., the lower end of the second radiator 202), and H1≥1mm. For example, H1 can be 1mm, 1.5mm, 1.8mm or 2mm, etc.

[0163] In addition, in order to avoid the distance between the portion of the first stub 211 arranged along the first direction Z and the second radiator 202 being relatively close, thus affecting the antenna pattern of the slot antenna formed by the second stub 212 and the second radiator 202, continue as Figure 8B shown, there is a second spacing H2 between the portion of the first stub 211 arranged along the first direction Z (for example, the first strip portion 2111) and the second radiator 202, and H2≥0.5mm. For example, H2 can be 0.5mm, 0.6mm, 0.8mm, 1mm, 1.5mm, 1.8mm or 2mm, etc.

[0164] Taking Figure 8B the antenna structure 20 shown as an example, the electrical length of the first stub 211 can be 1 / 4 wavelength of the first communication frequency band f1 (for example, the frequency band where 2.4GHz is located), so that the first stub 211 can generate a first resonance of the first communication frequency band f1. For example, as Fig. 9 shown in the S11 (antenna return loss) curve graph, the frequency of this first resonance can be the frequency of the resonance point ① (2.4495766, -3.603408), which is approximately 2.4GHz.

[0165] In this example, the antenna return loss can be understood as the ratio of the signal power reflected back to the antenna port through the antenna circuit to the transmitted power of the antenna port. The smaller the reflected signal, the larger the signal radiated into space through the antenna, and the higher the radiation efficiency of the antenna. The larger the reflected signal, the smaller the signal radiated into space through the antenna, and the lower the radiation efficiency of the antenna. The antenna return loss can be represented by the S11 parameter, and the S11 parameter is usually negative. The smaller the S11 parameter, the smaller the antenna return loss and the higher the radiation efficiency of the antenna; the larger the S11 parameter, the larger the antenna return loss and the lower the radiation efficiency of the antenna.

[0166] In this case, the 1 / 4 wavelength line common mode of the first stub 211 can operate in the first communication frequency band f1 (for example, the frequency band where 2.4 GHz is located). Among them, as can be seen from the current distribution diagram shown in (a) of Fig.10 , when operating in the first communication frequency band f1 (for example, the frequency band where 2.4 GHz is located), the 1 / 4 wavelength line common mode of the first stub 211 can refer to that the current strong point I1 is located at the position of the feeding end F (as shown in Figure 8B ), and the current zero point I0 is located at the open end a1 of the first radiator 201. Based on this, the current direction on the first stub 211 can point from the feeding end F (i.e., the position where the current strong point I1 is located) to the current zero point I0. Or, the current direction on the first stub 211 can point from the current zero point I0 to the feeding end F (the position where the current strong point I1 is located).

[0167] Based on this, as can be seen from the above, when the length of the part of the first stub 211 along the first direction Z cannot make the electrical length of the first stub 211 reach 1 / 4 wavelength of the first communication frequency band f1 (for example, the frequency band where 2.4 GHz is located), as shown in Figure 8B , the first stub 211 can include a first strip portion 2111 and a fifth strip portion 2115, where the fifth strip portion 2115 is arranged along the second direction Z. On this basis, when the length of the part of the first stub 211 along the first direction Z still cannot make the electrical length of the first stub 211 reach 1 / 4 wavelength of the first communication frequency band f1, an electronic component, such as an inductor, can be arranged at the end of the fifth strip portion 2115 away from the first strip portion 2111 to increase the electrical length of the first stub 211. In this way, it is possible to avoid adding an additional stub arranged along the first direction Z (not shown in the figure) at the end of the fifth strip portion 2115 away from the first strip portion 2111, so that when the current direction on the additional bracket is opposite to the current direction on the first strip portion 2111, the antenna radiation performance of the entire first stub 211 can be prevented from being affected.

[0168] On this basis, Fig.11 the curve shown is the antenna system efficiency curve. When the first stub 211 generates the first resonance in the first communication frequency band f1 (for example, the frequency band where 2.4 GHz is located), the frequency of this first resonance can be the resonance frequency points ① (2.4, -13.136), ② (2.44, -10.159), and ③ (2.48, -13.43) on the curve shown in Fig.11 . The frequencies of the above resonance frequency points ①, ②, and ③ are all around 2.4 GHz, and the average value of the antenna system efficiency (dB) is around -12.2 dB.

[0169] In the embodiments of the present application, the above system efficiency may refer to the ratio of the power radiated by the antenna into space (i.e., the power of the effectively converted electromagnetic wave part) to the input power of the antenna. The system efficiency is the actual efficiency after considering the antenna port matching, that is, the system efficiency of the antenna is the actual efficiency of the antenna (i.e., the efficiency).

[0170] As can be seen from the above, in Figure 7 the first radiator 201 shown, the electrical length of the first stub 211 may be 1 / 4 wavelength of the first communication band f1 (for example, the band where 2.4 GHz is located), so the first stub 211 can generate a first resonance of the first communication band f1. The frequency of the exemplary first resonance may be Fig.12 the frequency corresponding to the resonance frequency point ① shown (the S11 curve of the antenna structure), for example, 2.4 GHz. In some other embodiments of the present application, the first stub 211 may also generate a third resonance of the third communication band f3 at the same time. Exemplarily, the frequency of the third resonance may be Fig.12 the frequency corresponding to the resonance frequency point ② shown, for example, 6.5 GHz.

[0171] In this case, the electrical length of the above first stub 211 is 3 / 4 wavelength of the third communication band f3, and the 3 / 4 wavelength line of the first stub 211 operates in common mode in the third communication band f3. Among them, as can be seen from the current distribution diagram shown in Fig.13 , when operating in the third communication band f3 (for example, the band where 6 GHz is located), the 3 / 4 wavelength line of the first stub 211 in common mode means that the current strong point I1 is located at the feeding end F (as shown in Figure 8B ), and the current zero point I0 is located at the open end a1 of the first radiator 201. Based on this, the current direction on the first stub 211 is as shown by the arrow, pointing from the current zero point I0 to the feeding end F (the position where the current strong point I1 is located), or the current direction on the first stub 211 can point from the feeding end F (the position where the current strong point I1 is located) to the current zero point I0.

[0172] The above takes the third communication band f3 as the band where 6 GHz is located as an example for illustration. In some other embodiments of the present application, the above third communication band f3 may also be the band where 7 GHz is located. The present application does not limit the third communication band f3, as long as any one frequency in the above third communication band f3 is greater than any one frequency in the second communication band f2 (for example, the band where 5G is located).

[0173] In addition, as can be seen from the above, in Figure 8BAs shown, there is a gap S between the second stub 212 and the second radiator 202, so that the second stub 212 and the second radiator 202 can form a slot antenna. The above slot antenna can generate a second resonance in the second communication frequency band f2. Exemplarily, as Fig. 9 can be seen from the S11 (antenna return loss) curve graph shown, the frequency of this second resonance can be approximately 5.2 GHz, which is the frequency at the resonance point ② (5.167, -19.96941).

[0174] In this case, the 1 / 2 wavelength slot common mode of the second stub 212 and the second radiator 202 can operate in the first sub-communication frequency band f21 (for example, the 5GL frequency band). Among them, as Fig.10 shown in (b) of, when operating in the first sub-communication frequency band f21 (for example, the 5GL frequency band), the 1 / 2 wavelength slot common mode of the second stub 212 and the second radiator 202 means that one current strong point I1 is located at the feeding end F (as Figure 8B shown), and the other current strong point I2 is located at the end of the second radiator 202 away from the second stub 212, and the current zero point I0 is located at the position of the gap S. The current directions on the second stub 212 and the second radiator 202 are the same.

[0175] Exemplarily, the current direction on the second stub 212 can point from the feeding end (the position where the current strong point I1 is located) to the current zero point I0, and the current direction on the second radiator 202 can point from the current zero point I0 to the end of the second radiator 202 away from the second stub 212 (the position where the current strong point I2 is located). Or, again exemplarily, the current direction on the second radiator 202 can point from the end of the second radiator 202 away from the second stub 212 (the position where the current strong point I2 is located) to the current zero point I0, and the current direction on the second stub 212 can point from the current zero point I0 to the feeding end (the position where the current strong point I1 is located).

[0176] In addition, the second resonance of the above slot antenna in the second communication frequency band f2 can also be, exemplarily, as Fig. 9 can be seen from the S11 (antenna return loss) curve graph shown, the frequency of this second resonance can be approximately 5.8 GHz, which is the frequency at the resonance point ③ (5.878, -9.261627).

[0177] In this case, the 1 / 2 wavelength slot differential mode (DM) of the second stub 212 and the second radiator 202 in the slot antenna can also operate in the second sub-communication frequency band f22 (for example, the 5GH frequency band). Among them, as Fig.10As shown in (c), when operating in the second sub - communication frequency band f22 (e.g., 5G Hz band), the 1 / 2 - wavelength slot differential mode between the second stub 212 and the second radiator 202 means that the current directions on the second stub 212 and the second radiator 202 can be opposite. Exemplarily, the current direction on the second stub 212 can point from the feeding end (the position where the current strong point I1 is located) to the current zero point I0, and the current direction on the second radiator 202 can point from the end of the second radiator 202 away from the second stub 212 (the position where the current strong point I2 is located) to the current zero point I0. Or, again exemplarily, the current direction on the second stub 212 can point from the current zero point I0 to the feeding end (the position where the current strong point I1 is located), and the current direction on the second radiator 202 can point from the current zero point I0 to the end of the second radiator 202 away from the second stub 212 (the position where the current strong point I2 is located).

[0178] Based on this, when the 1 / 2 - wavelength slot common mode of the second stub 212 and the second radiator 202 operates in the first sub - communication frequency band f21 (e.g., 5G L band), the slot antenna formed by the second stub 212 and the second radiator 202 generates a second resonance in the first sub - communication frequency band f21 (e.g., 5G L band). The frequency of this second resonance can be Fig.11 the resonance frequency points ④ (5.17, - 11.797), point ⑤ (5.25, - 8.8819), and point ⑥ (5.33, - 10.263) on the curve shown. The frequencies of the above - mentioned resonance frequency points ④, point ⑤, and point ⑥ are all around 5.2 GHz, and the average value of the antenna system efficiency (dB) is around - 10.2 dB.

[0179] In addition, when the 1 / 2 - wavelength slot differential mode of the second stub 212 and the second radiator 202 operates in the second sub - communication frequency band f22 (e.g., 5G H band), the slot antenna formed by the second stub 212 and the second radiator 202 generates a second resonance in the second sub - communication frequency band f22 (e.g., 5G H band). The frequency of this second resonance can be Fig.11 the resonance frequency points ⑦ (5.75, - 8.4081), point ⑧

[0180] (5.8, - 7.9773), and point ⑨ (5.85, - 8.0289) on the curve shown. The frequencies of the above - mentioned resonance frequency points ⑦, point ⑧, and point ⑨ are all around 5.8 GHz, and the average value of the antenna system efficiency (dB) is around - 8.1 dB.

[0181] Among them, Fig.10 in (a), Fig.10 in (b), and Fig.10 in (c), as well as Fig.11The "dB" in it is decibel, which is a logarithmic concept with base 10. Decibel is only used to evaluate the proportional relationship between one physical quantity and another physical quantity, and it has no physical dimension itself. If the ratio between two quantities increases by 10 times, their difference can be expressed as 10 decibels.

[0182] In the embodiments of the present application, the wavelength in a certain wavelength mode of the antenna (such as 1 / 4 wavelength line common mode, etc.) can refer to the wavelength of the signal radiated by the antenna. For example, the 1 / 4 wavelength line common mode of the first stub 211 operates in the first communication band f1 (for example, the band where 2.4 GHz is located), and the wavelength in the 1 / 4 wavelength line common mode refers to the wavelength of the signal of the first stub 211 in the first communication band f1. It should be understood that the wavelength of the radiated signal in air can be calculated as follows: (air wavelength, or vacuum wavelength) = speed of light / frequency, where the frequency is the frequency of the radiated signal (MHz), and the speed of light can be taken as 3×10^8 m / s. The wavelength of the radiated signal in a medium can be calculated as follows: where ε is the relative permittivity of the medium. The wavelengths in the remaining antenna modes can be obtained in the same way and will not be elaborated here.

[0183] As can be seen from the above, the physical lengths of the first stub 211 and the second stub 212 may not be equal. In some embodiments of the present application, the physical length of the first stub 211 (for example, Figure 7 the sum of the lengths of the first strip portion 2111 and the second strip portion 2112 shown, or as Figure 8B shown, the sum of the lengths of the fifth strip portion 2115 and the first strip portion 2111) and the physical length of the second stub 212 (for example, Fig. 8A or Figure 8B shown, the sum of the lengths of the third strip portion 2123 and the fourth strip portion 2124) have a ratio between 1.5:1 and 2.5:1. In this way, the electrical length of the first stub 211 can be 1 / 4 wavelength of the first communication band f1 (for example, the band where 2.4 GHz is located), and the electrical lengths of the second stub 212 and the second radiator 202 can be 1 / 4 wavelength of the second communication band f2 respectively.

[0184] For example, when the relative permittivity of the antenna bracket 112 (as Figure 5 shown) is between 2.5 and 3, Figure 8BThe physical length of the first stub 211 shown can be 15 mm to 25 mm. For example, the physical length of the first stub 211 can be 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, 21 mm, 22 mm, 23 mm, 24 mm, or 25 mm. The physical length of the second stub 212 can be 5 mm to 10 mm, and the physical length of the second radiator 202 can be 5 mm to 10 mm. For example, the physical length of the second stub 212 or the physical length of the second radiator 202 can be 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, or 10 mm.

[0185] In summary, as Figure 8B shown, the antenna structure 20 of the wireless earphone 02 provided in the embodiment of the present application can include a first radiator 201, a second radiator 202, a feeding end F, and a grounding end G. The feeding end F can be disposed on the first radiator 201, and the feeding end F can divide the first radiator 201 into a first stub 211 and a second stub 212. The side of the first stub 211 facing away from the earcup 10 (as Figure 2 shown) (i.e., the lower side of the first stub 211) has an open end. There is a gap S between the second radiator 202 and the second stub 212, and the second radiator 202 and the second stub 212 can form a slot antenna. On this basis, since the first stub 211 is used to generate the first resonance of the first communication band f1 (for example, the band where 2.4 GHz is located), the communication band of the antenna structure 20 having the first stub 211 can cover the first communication band f1 (for example, the band where 2.4 GHz is located).

[0186] In addition, since the second radiator 202 and the second stub 212 can form a slot antenna, and the second stub 212 and the second radiator 202 are used to generate the second resonance of the second communication band f2, the communication band of the antenna structure 20 having the second radiator 202 and the second stub 212 can cover the second communication band f2 (for example, the band where 5 GHz is located, including the 5G L band and the 5G H band).

[0187] In this case, when the user uses the wireless earphone 02 in a quiet environment, the antenna structure 20 of the wireless earphone 02 can operate in the first communication band f1 (for example, the band where 2.4 GHz is located) or the second communication band f2 (for example, the band where 5 GHz is located), so that the wireless earphone 02 can establish a communication connection with a mobile terminal, such as a mobile phone. In addition, when the user is in a noisy environment, such as an airport or a high-speed rail station where there is a dense crowd, the antenna structure 20 of the wireless earphone 02 can operate in the second communication band f2 (for example, the band where 5 GHz is located, including the 5GL band and the 5GH band). In this way, even though the interference noise in the surrounding environment where the wireless earphone 02 is located is large, because the spectrum of the band where 5 GHz is located is wider and the noise is much lower than that of the band where 2.4 GHz is located, the band where 5 GHz is located can support high-definition communication. For example, the adjustment threshold of high-definition music can reach 4.6 Mbps, improving the communication quality and anti-interference ability of the wireless earphone 02.

[0188] In addition, as can be seen from the above, the slot antenna composed of the second radiator 202 and the second stub 212 can generate a second resonance in the second communication band f2. The first stub 211 can generate a first resonance in the first communication band f1, and the first stub 211 is also used to generate a third resonance in the third communication band f3. Any frequency in the third communication band f3 is greater than any frequency in the second communication band f2 (for example, the band where 5G is located). Therefore, the wireless earphone 02 provided by the embodiment of the present application can cover the first communication band f1 (for example, the band where 2.4 GHz is located), the second communication band f2 (for example, the 5GL and 5GH bands), and in addition, can also cover the third communication band f3 (for example, the 6 GHz or 7 GHz band), which is beneficial to improving the applicable range of the wireless earphone 02.

[0189] Based on this, compared with 2.4 GHz, the diffraction ability of 5 GHz electromagnetic waves through the human body is weaker. For example, as Fig.14 shown, the user 04 wears the wireless earphone 02 on the left ear, and the wireless earphone 02 has established a 2.4 GHz communication link and a 5 GHz communication link with a mobile terminal, such as a mobile phone, located on the right side of the user 04. It can be seen that the defect angle β (i.e., the minimum gain angle) of the 5 GHz three-dimensional antenna pattern is greater than that of the 2.4 GHz three-dimensional antenna pattern. Therefore, when the wireless earphone 02 worn on the left ear of the user 04 communicates with the mobile terminal located on the right side of the user 04 through the 5 GHz communication link, when the mobile terminal is located at the position of the defect angle β of the 5 GHz three-dimensional antenna pattern, the signal transmitted between the wireless earphone 02 and the mobile terminal is weak, resulting in the disconnection of the communication connection between the wireless earphone 02 and the mobile terminal, and causing the connection between the wireless earphone 02 and the mobile terminal to freeze.

[0190] Among them, Fig.14 "dBi" in is the unit of power gain. The reference benchmark of dBi is an omnidirectional antenna.

[0191] The above is an example illustration of the defect angle of the three-dimensional antenna pattern with the wireless earphone 02 worn on the user's left ear. In some other embodiments of the present application, the wireless earphone 02 can be worn on the user's right ear, which is not limited in the present application, and the defect angle of the three-dimensional antenna pattern under different communication frequency bands is the same as described above and will not be elaborated here.

[0192] To solve the above problems, the wireless earphone 02 provided in the embodiments of the present application, as can be seen from the above, in this wireless earphone 02, as Fig.10 shown in (b) of, there is a gap S between the second stub 212 and the second radiator 202, so that the second stub 212 and the second radiator 202 can form a slot antenna, and the 1 / 2 wavelength slot common mode of this slot antenna can operate in the first sub-communication frequency band f21 (for example, 5G L band). At this time, the three-dimensional antenna pattern of the antenna structure in the wireless earphone 02 can be as Fig.15 shown in (a) of, and the pattern null points (the lighter parts) are located at both ends along the vertical direction (i.e., the o4 direction) in the drawing.

[0193] In addition, the 1 / 2 wavelength slot differential mode of the slot antenna formed by the second stub 212 and the second radiator 202 can operate in the second sub-communication frequency band f22 (for example, 5G H band) as Fig.10 shown in (c) of. At this time, the three-dimensional antenna pattern of the antenna structure in the wireless earphone 02 can be as Fig.15 shown in (b) of, and the pattern null points (the lighter parts) are located in the plane where o3o4 is located in the drawing.

[0194] In this way, when the 1 / 2 wavelength slot common mode of the slot antenna operates in the first sub-communication frequency band f21 (for example, 5G L band), the three-dimensional antenna pattern of the antenna structure in the wireless earphone 02 as Fig.15 shown in (a) of, and when the 1 / 2 wavelength slot differential mode of the slot antenna operates in the second sub-communication frequency band f22 (for example, 5G H band) as Fig.10 shown in (c) of, the three-dimensional antenna pattern of the antenna structure in the wireless earphone 02 as Fig.15 shown in (b) of has a large difference, and the above two three-dimensional antenna patterns can be orthogonal or approximately orthogonal.

[0195] Among them, the antenna pattern is also called the radiation pattern. The antenna pattern refers to the graph of the relative field strength (normalized modulus value) of the antenna radiation field changing with direction at a certain distance from the antenna. Usually, it is represented by two mutually perpendicular planar antenna patterns passing through the maximum radiation direction of the antenna.

[0196] Based on this, in some embodiments of the present application, on one ear of user 04, for example, the left ear, the above-mentioned wireless earphone 02 is worn, and a slot antenna formed by the second stub 212 and the second radiator 202 is used to generate the second resonance of the second communication band f2 (including 5GL and 5GH). In this case, the three-dimensional antenna pattern of the antenna structure in the wireless earphone 02 is obtained. Specifically, when the 1 / 2 wavelength slot of the above-mentioned slot antenna operates in common mode at the first sub-communication band f21 (for example, 5.2 GHz) in the second communication band f2, the three-dimensional antenna pattern of the antenna structure in the wireless earphone 02 can be as Fig.16 shown in (a) of. The three-dimensional antenna pattern has a first defect angle β1 on the right side of user 04. When the mobile terminal (for example, a mobile phone) that establishes a communication connection with the wireless earphone 02 is located at the position of the first defect angle β1 on the right side of the user, there will be a phenomenon of communication connection jamming between the wireless earphone 02 and the mobile terminal.

[0197] In addition, when the 1 / 2 wavelength slot of the above-mentioned slot antenna operates in differential mode at the second sub-communication band f22 (for example, 5.8 GHz) in the second communication band f2, the three-dimensional antenna pattern of the antenna structure in the wireless earphone 02 can be as Fig.16 shown in (b) of. The three-dimensional antenna pattern has a second defect angle β2 on the right side of user 04. When the mobile terminal (for example, a mobile phone) that establishes a communication connection with the wireless earphone 02 is located at the position of the second defect angle β2 on the right side of the user, there will be a phenomenon of communication connection jamming between the wireless earphone 02 and the mobile terminal.

[0198] From Fig.16 (a) of and Fig.16 (b) of, it can be seen that when the 1 / 2 wavelength slot of the slot antenna in the above-mentioned wireless earphone 02 operates in common mode at the first sub-communication band f21 (for example, 5.2 GHz), the first defect angle β1 is generated, and when the 1 / 2 wavelength slot of the slot antenna operates in differential mode at the second sub-communication band f22 (for example, 5.8 GHz), the positions of the second defect angle β2 are different.

[0199] In this case, when there is a communication connection jam between the wireless earphone 02 and the mobile terminal, if the 1 / 2 wavelength slot of the slot antenna operates in common mode at the first sub-communication band f21 (for example, 5.2 GHz), it can be determined that the mobile terminal is located at Fig.16The position of the first defective angle β1 shown in (a) therein. At this time, the mobile terminal can control the slot antenna in the wireless headset 02 to switch to the 1 / 2 wavelength slot differential mode of the second sub-communication frequency band f22 (for example, 5.8 GHz). At this time, the defective angle of the slot antenna radiation pattern is Fig.16 the above-mentioned second defective angle β2 shown in (b) therein, but the mobile terminal is still located at the position of the above-mentioned first defective angle β1. Since the positions of the first defective angle β1 and the second defective angle β2 are different, communication can be carried out between the mobile terminal and the wireless headset 02 through the communication link of the second sub-communication frequency band f22 (for example, 5.8 GHz), alleviating the communication lag phenomenon between the wireless headset 02 and the mobile terminal.

[0200] Similarly, when there is a communication lag in the communication connection between the wireless headset 02 and the mobile terminal, if the 1 / 2 wavelength slot differential mode of the slot antenna operates in the second sub-communication frequency band f22 (for example, 5.8 Hz), it can be determined that the mobile terminal is located at Fig.16 the position of the second defective angle β2 shown in (b) therein. At this time, the mobile terminal can control the slot antenna in the wireless headset 02 to switch to the 1 / 2 wavelength slot common mode of the first sub-communication frequency band f21 (for example, 5.2 GHz). At this time, the defective angle of the slot antenna radiation pattern is Fig.16 the above-mentioned first defective angle β1 shown in (a) therein, but the mobile terminal is still located at the position of the above-mentioned second defective angle β2. Since the positions of the first defective angle β1 and the second defective angle β2 are different, communication can be carried out between the mobile terminal and the wireless headset 02 through the communication link of the first sub-communication frequency band f21 (for example, 5.2 GHz), alleviating the communication lag phenomenon between the wireless headset 02 and the mobile terminal.

[0201] In this way, by switching between the first sub-communication frequency band f21 (for example, 5.2 GHz) and the second sub-communication frequency band f22 (for example, 5.8 GHz), the complementarity between the above-mentioned first defective angle β1 and the second defective angle β2 can be achieved, and the problem of communication lag between the wireless headset 02 and the mobile terminal can be alleviated.

[0202] The above is an example illustration of achieving the complementarity between the first defective angle β1 and the second defective angle β2 by switching between the first sub-communication frequency band f21 (for example, 5.2 GHz) and the second sub-communication frequency band f22 (for example, 5.8 GHz) when the user wears the wireless headset 02 on the left ear, the mobile terminal is on the right side, and the user 04's head is in a state of looking straight ahead.

[0203] In some other embodiments of the present application, such as Fig.17As shown, when the user 04 wears the wireless headset 02 on the right ear, when the user 04 is on the left side, no matter the user 04 is looking straight ahead, looking up or looking down, the communication jam between the wireless headset 02 and the mobile terminal can be alleviated by switching between the 5GL and 5GH frequency bands. Fig.17 The o1o2 plane in is parallel to the ground where the user stands.

[0204] For example, Fig.18 As shown in (a) of FIG. 1 , the user 04 looks straight ahead, and the wireless headset 02 is worn on the user's right ear. Fig.18 As shown in (b), in the azimuth planes where the angle phi is 90° and 270°, the first defect angle β1 of the 1 / 2 wavelength slot common mode of the slot antenna in the wireless headset when operating in the first sub-communication frequency band f21 (for example, 5.2 GHz) is different from the position of the second defect angle β2 of the 1 / 2 wavelength slot differential mode of the slot antenna when operating in the second sub-communication frequency band f22 (for example, 5.8 Hz).

[0205] As mentioned above, when the mobile terminal is located on the opposite side of the user 04 (for example, the left side), the first sub-communication frequency band f21 (for example, 5.2 GHz) and the second sub-communication frequency band f22 (for example, 5.8 GHz) can be switched to achieve the complementarity of the first defect angle β1 and the second defect angle β2, thereby alleviating the communication jam problem between the wireless headset 02 and the mobile terminal. Among them, the angle phi shown in (a) of 15 is the azimuth plane of 90° and 270°, which is along Fig.17 The dotted line of 90° points to 270°, which is the plane obtained by cutting perpendicular to the o1o2 plane.

[0206] Another example, such as Fig.19 As shown in (a) of FIG. 1 , the head of user 04 is in an upward position, and the head of user 04 can be Fig.17 There is an angle α between the o1o2 planes. For example, the angle α may be 15°. In addition, the wireless headset 02 is also worn on the user's right ear. At this time, Fig.19 As shown in (b), in the azimuth planes where the angle phi is 90° and 270°, the first defect angle β1 of the above-mentioned slot antenna in the wireless headset when the 1 / 2 wavelength slot common mode works in the first sub-communication frequency band f21 (for example, 5.2 GHz) is different from the position of the second defect angle β2 when the 1 / 2 wavelength slot differential mode of the slot antenna works in the second sub-communication frequency band f22 (for example, 5.8 Hz). Similarly, when the mobile terminal is located on the opposite side of the user 04 (for example, the left side), the complementarity of the above-mentioned first defect angle β1 and the second defect angle β2 can be achieved by switching the first sub-communication frequency band f21 (for example, 5.2 GHz) and the second sub-communication frequency band f22 (for example, 5.8 GHz).

[0207] As another example, as Fig. 20 shown in (a) of, the head of user 04 is in a buried state, and the user's head 04 can have an angle α with the Fig.17 plane o1o2 in. For example, this angle α can be -15°. In addition, the wireless earphone 02 is also worn on the user's right ear. At this time, as Fig. 20 shown in (b) of, within the azimuth planes where the included angle phi is 90° and 270°, the positions of the first defect angle β1 when the 1 / 2-wavelength slot of the slot antenna in the wireless earphone operates in the common mode in the first sub-communication frequency band f21 (for example, 5.2 GHz) and the second defect angle β2 when the 1 / 2-wavelength slot of the slot antenna operates in the differential mode in the second sub-communication frequency band f22 (for example, 5.8 Hz) are different. Similarly, when the mobile terminal is on the opposite side (for example, the left side) of user 04, by switching the first sub-communication frequency band f21 (for example, 5.2 GHz) and the second sub-communication frequency band f22 (for example, 5.8 GHz), the complementarity between the first defect angle β1 and the second defect angle β2 can be achieved.

[0208] Some other embodiments of the present application provide a wireless earphone, which also includes an ear cup 10 and an ear stem 11 as shown in Figure 2 , and an antenna structure 20, a circuit board 110 and an antenna bracket 112 as shown in Fig.21 . The structures of the above ear cup 10, ear stem 11, circuit board 110 and antenna bracket 112 are the same as those described above and will not be elaborated here. In addition, Fig.21 the antenna structure 20 shown in can include a first radiator 201, a feeding end F, and a grounding end G. Among them, the above feeding end F can be arranged on the first radiator 201, and the feeding end F can divide the first radiator 201 into a first branch 211 and a second branch 212, and a part of the first branch 211 along the first direction Z and a part of the second branch 212 along the first direction Z are arranged oppositely. Among them, the division of the first branch 211 and the second branch 212 is the same as that described above and will not be elaborated here. And, the first branch 211 and the second branch 212 can be asymmetrically arranged with respect to the feeding end F.

[0209] In addition, the grounding end G is arranged on the first branch 211. By way of example, the grounding end G can be arranged at the end of the first branch 211, such as the open end a1. Or, it can be arranged at any position on the first branch 211 according to the electrical length requirement of the first branch 211. Based on this, in order to realize the grounding of the first radiator 201 through the grounding end G, the antenna structure 20 can further include as Fig.22AThe floor 100 and the first switch M1 shown. There is a gap between the floor 100 and at least a part of the first radiator 201 to achieve antenna clearance. In addition, the floor 100 is arranged in the same way as described above, which will not be elaborated here. In this case, continue as Fig.22A shown, the first switch M1 can be arranged between the ground terminal G and the floor 100. The first end c1 of the first switch M1 is coupled to the ground terminal G, and the second end c2 of the first switch M1 is coupled to the floor 100.

[0210] Wherein, if the first switch M1 is in the first state (for example, the cut-off state), the first stub 211 is used to generate the first resonance of the first communication band f1 (for example, the band where 2.4 GHz is located). The second stub 212 is used to generate the second resonance of the second communication band f2 (for example, the 5GL band or the 5GH band). In addition, if the first switch M1 is in the second state (for example, the conducting state), the first stub 211 is used to generate the second resonance of the second communication band f2 (for example, the 5GL band or the 5GH band), and the second stub 212 is used to generate the second resonance of the second communication band f2 (for example, the 5GL band or the 5GH band). As described above, any frequency in the second communication band f2 (for example, the 5GL band or the 5GH band) is greater than any frequency in the first communication band f1 (for example, the band where 2.4 GHz is located).

[0211] Based on this, in order to make the first switch M1 in the first state, the first stub 211 generates the first resonance of the first communication band f1, and the second stub 212 generates the second resonance of the second communication band f2. When the first switch M1 is in the first state, the electrical length of the first stub 211 can be 1 / 4 wavelength of the first communication band f1 (for example, the band where 2.4 GHz is located), and the electrical length of the second stub 212 can be 1 / 4 wavelength of the second communication band f2 (for example, the 5 GHz band).

[0212] In addition, in order to make the first switch M1 in the second state, the first stub 211 generates the second resonance of the second communication band f2. When the first switch is in the second state, the electrical length of the first stub 211 can be 2 / 5 - 2 / 3 wavelength of the second communication band f2, and the electrical length of the second stub 212 can be 1 / 4 wavelength of the second communication band f2. By way of example, when the first switch M1 is in the second state, the electrical length of the first stub 211 can be 1 / 2 wavelength of the second communication band f2.

[0213] In this way, by the same token, the wireless earphone 02 with the above antenna structure 20 can cover the first communication frequency band f1 (for example, the frequency band where 2.4 GHz is located), and can also cover the second communication frequency band f2 (including the 5G L band and the 5G H band), so that the communication frequency band between the wireless earphone 02 and the mobile terminal can be switched according to the environment where the user is located. For example, when the ambient interference noise is relatively large, by switching to the second communication frequency band f2 (for example, the 5G L band and the 5G H band) to support high-definition communication.

[0214] Among them, the above is an example illustration with the second state of the first switch M1 being a state close to short circuit or conduction or connection, and the first state of the first switch M1 being a state close to open circuit or cut-off or disconnection. In some embodiments of the present application, the second state and the first state of the above first switch M1 can also be intermediate states between short circuit and open circuit. Or, it can include both the short circuit state and the open circuit state at the same time. In the embodiments of the present application, the second state and the first state of the remaining switches, as well as the electrical connection state and the electrical isolation state between two components are the same as those described above, and will not be elaborated one by one. For the convenience of description below, an example illustration is made with the first state of the first switch M1 being a state close to open circuit or cut-off or disconnection, and the second state of the first switch M1 being a state close to short circuit or conduction or connection.

[0215] The following gives an example illustration of the coupling method between the above first switch M1 and the floor 100. In some embodiments of the present application, as Fig.22A shown, the second end c2 of the first switch M1 can be directly coupled to the floor 100. When the first switch M1 is in the second state, in the second communication frequency band f2 (for example, the 5G L band or the 5G H band), the ground terminal G can be in an electrically connected state (or grounded or short-circuited state) with the floor 100, so that the first stub 211 generates a second resonance of the second communication frequency band f2. In addition, when the above first switch M1 is in the first state, in the second communication frequency band f2, the ground terminal G and the floor 100 are in an electrically isolated state (or non-grounded or open-circuited state).

[0216] In addition, in the embodiments of the present application, the two components (for example, the above ground terminal G and the floor 100) being in an electrically connected state means that the two components are electrically connected to each other, so that electrical signals of the second communication frequency band f2 (for example, the 5G L band or the 5G H band) can be transmitted between the two components. In addition, the two components being in an electrically isolated state means that the two components are not electrically connected to each other, so that electrical signals of the second communication frequency band f2 cannot be transmitted between the two components.

[0217] In some embodiments of the present application, in order to enable the ground terminal G and the floor 100 to be in the above-mentioned electrical connection state or the above-mentioned electrical isolation state, the second terminal c2 of the first switch M1 can be coupled to two paths of devices, such as the first path of device and the second path of device. The above-mentioned first path of device and the second path of device can serve as an impedance network with a filtering function. When the first switch M1 is in the above-mentioned second state (i.e., a state close to short circuit or conduction or connection), in the second communication frequency band f2 (for example, 5GL band or 5GH band), the first path of device enables the above-mentioned two components, such as the ground terminal G and the floor 100, to be in the above-mentioned electrical connection state (or grounded or short-circuited state). At this time, for the above-mentioned impedance network with a filtering function, the second communication frequency band f2 is a passband. In addition, when the first switch M1 is in the above-mentioned first state (i.e., a state close to open circuit or cut-off or disconnection), in the second communication frequency band f2, the second path of device can enable the ground terminal G and the floor 100 to be in an electrically isolated state (or non-grounded or open-circuit state). For the above-mentioned impedance network with a filtering function, the above-mentioned second communication frequency band f2 is a stopband.

[0218] On this basis, in the case where the above-mentioned impedance network with a filtering function includes a capacitor, when the capacitance value remains unchanged, the lower the second communication frequency band f2, the closer the impedance network is to the open-circuit state; conversely, the higher the second communication frequency band f2, the closer the impedance network is to the short-circuit state. In addition, when the second communication frequency band f2 remains unchanged, the larger the capacitance value, the closer the impedance network is to the short-circuit state; conversely, the smaller the capacitance value, the closer the impedance network is to the open-circuit state. Or, for another example, in the case where the above-mentioned impedance network includes an inductor, when the inductance value remains unchanged, the lower the second communication frequency band f2, the closer the impedance network is to the short-circuit state; conversely, the higher the second communication frequency band f2, the closer the impedance network is to the open-circuit state. In addition, when the second communication frequency band f2 remains unchanged, the larger the inductance value, the closer the impedance network is to the open-circuit state; conversely, the smaller the inductance value, the closer the impedance network is to the short-circuit state.

[0219] Based on this, in order to enable the electrical states of the above-mentioned first path of device and the second path of device, which are mainly used to form the above-mentioned impedance network with a filtering function, to be different in the second communication frequency band f2, in some embodiments of the present application, the equivalent capacitance value (or equivalent inductance value) of the above-mentioned first path of device can be larger than the equivalent capacitance value (or equivalent inductance value) of the second path of device. Or, conversely, the equivalent capacitance value (or equivalent inductance value) of the above-mentioned first path of device can be smaller than the equivalent capacitance value (or equivalent inductance value) of the second path of device. In this way, the equivalent capacitance values (or equivalent inductance values) of the first path of device and the second path of device can be set according to the different frequencies of the transmitted signals.

[0220] In this case, the antenna structure 20 may include at least one impedance network disposed between the ground terminal G and the floor 100, and the at least one impedance network may be the impedance network having a filtering function. As can be seen from the above, the impedance network includes devices such as capacitors / inductors / resistors connected in series or in parallel, so that the ground terminal G can be electrically connected to the floor 100 through the impedance network to achieve grounding of the devices at the feeding end. The above impedance network can perform at least one of impedance matching and filtering.

[0221] For example, taking the at least one impedance network disposed between the ground terminal G and the floor 100 as an example, the antenna structure 20 may include Fig. 22B a first impedance network 31 and a second impedance network 32 as shown. The first impedance network 31 is disposed between the second terminal c2 of the first switch M1 and the floor 100, and the first impedance network 31 can be coupled to the second terminal c2 of the first switch M1 and the floor 100. In addition, the second impedance network 32 is disposed between the third terminal a3 of the first switch M1 and the floor 100, and the second impedance network 32 is coupled to the third terminal a3 of the first switch M3 and the floor 100. Based on this, for the second communication band f2 (for example, 5GL band or 5GH band), the first switch M1 has the above two states: the first state and the second state.

[0222] Among them, in the second communication band f2 (for example, 5GL band or 5GH band), when the first switch M1 is in the second state, the first terminal a1 and the second terminal c2 of the first switch M1 are in an electrically connected state, so that the ground terminal G can be electrically connected to the floor 100 through the first switch M1 and the first impedance network 31. For example, when the first switch M1 is in the second state, the first impedance network 31 can achieve 0 ohm grounding of the ground terminal G. Or, for another example, the first impedance network 31 can have the function of impedance matching, so that the S parameters in the second communication band f2 can be tuned according to simulation and actual debugging. In this case, signals of all frequency bands included in the antenna structure 20 can be transmitted between the ground terminal G and the floor 100.

[0223] In addition, in the second communication band f2 (for example, 5GL band or 5GH band), when the first switch M1 is in the first state, the first terminal a1 and the second terminal c2 of the first switch M1 are in an electrically isolated state. At this time, the first terminal a1 and the third terminal a3 of the first switch M1 are in an electrically connected state. In this case, the second impedance network 32 may include devices having an open-circuit characteristic for the second communication band f2, such as a capacitor with a small capacitance value or an inductor with a large inductance value, etc. Or, for another example, in the second communication band f2, when the first switch M1 is in the first state, the first terminal a1 and the third terminal a3 of the first switch M1 may be in an electrically isolated state.

[0224] The following Fig.21 The setting method of the feeding terminal F in the example is illustrated as follows. Fig.23 As shown, the first branch 211 may be an L-shaped branch, and the first branch 211 may include a first strip-shaped portion 2111 and a second strip-shaped portion 2112 that are cross-arranged. As described above, the first strip-shaped portion 2111, the second strip-shaped portion 2112 and the second branch 212 are sequentially connected to form the above-mentioned first radiator 201. In addition, the strip-shaped second branch 212 is arranged opposite to the first strip-shaped portion 2111. The arrangement of the first strip-shaped portion 2111, the second strip-shaped portion 2112 and the second branch 212 in the ear handle 11 and the technical effects are the same as described above and will not be repeated here. Based on this, the feeding end F may be located on the side of the second branch 212 facing the second strip-shaped portion 2112.

[0225] Or, for example, Fig.24A As shown, the second branch 212 may be an L-shaped branch, and the second branch 212 may include a third strip-shaped portion 2123 and a fourth strip-shaped portion 2124 that are cross-arranged. As described above, the first branch 211, the third strip-shaped portion 2123, and the fourth strip-shaped portion 2124 are sequentially connected to form the above-mentioned first radiator 201. In addition, at least a portion of the first branch 211 along the first direction Z may be arranged relative to the fourth strip-shaped portion 2124. The arrangement manner and technical effects of the third strip-shaped portion 2123, the fourth strip-shaped portion 2124, and the first branch 211 in the ear handle 11 are the same as described above and will not be repeated here. Based on this, the feeding end F may be located on the side of the third strip-shaped portion 2123 facing the first branch 211.

[0226] Similarly, for example, when the first switch M1 is in the first state, the length of the portion of the first branch 211 along the first direction Z cannot make the electrical length of the first branch 211 reach 1 / 4 wavelength of the first communication frequency band f1 (for example, the frequency band where 2.4 GHz is located). Fig. 24B As shown, the first branch 211 may include a first strip-shaped portion 2111 and a fifth strip-shaped portion 2115 which are arranged crosswise. As described above, the fifth strip-shaped portion 2115, the first strip-shaped portion 2111 and the second branch 212 (for example, including the third strip-shaped portion 2123 and the fourth strip-shaped portion 2124) are sequentially connected to form the first radiator 201. Among them, the arrangement method and technical effects of the fifth strip-shaped portion 2115, the first strip-shaped portion 2111, the third strip-shaped portion 2123 and the fourth strip-shaped portion 2124 in the ear handle 11 are the same as described above and will not be repeated here. Based on this, the ground terminal G can be arranged on the side of the fifth strip-shaped portion 2115 away from the first strip-shaped portion 2111.

[0227] Based on this, continue as Fig. 24BAs shown, at one end where the fifth mold part 2115 deviates from the first mold part 2111, there is a first distance H1 between it and the second branch 212. The value of the first distance H1 and the technical effects are the same as those described above, and will not be elaborated here. In addition, in order to reduce the influence on the antenna patterns of the first branch 211 and the second branch 212 caused by the relatively short distance between the part of the first branch 211 arranged along the first direction Z (for example, the first mold part 2111) and the part of the second branch 212 arranged along the first direction Z (for example, the fourth mold part 2124), there is a third distance H3 between the part of the first branch 211 arranged along the first direction Z (for example, the first mold part 2111) and the part of the second branch 212 arranged along the first direction Z (for example, the fourth mold part 2124), and H3≥0.5mm. By way of example, H3 can be 0.5mm, 0.6mm, 0.8mm, 1mm, 1.5mm, 1.8mm or 2mm, etc.

[0228] The above is based on Fig.23 the long side L1 on the left side of the earpiece 11 where the center feed end F is located, and Fig.24A and Fig. 24B the long side L1 on the right side of the earpiece 11 where the center feed end F is located as examples for illustration. By adopting the above two setting methods, when the user wears the wireless earphone 02, the feed end F can be located at a position far from the user's auricle as Figure 3 shown, so as to reduce the absorption of the feed signal by the human body.

[0229] Taking Fig. 24B the antenna structure 20 shown as an example, since in the case where the first switch M1 (as Fig.22A shown) is in the first state (for example, the cut-off state), the electrical length of the first branch 211 can be 1 / 4 wavelength of the first communication frequency band f1 (for example, the frequency band where 2.4GHz is located), so when the first switch M1 is in the first state, the first branch 211 can generate a first resonance of the first communication frequency band f1. By way of example, as can be seen from the S11 curve graph shown in Fig.25A , the frequency of this first resonance can be the frequency of the resonance point ① (2.449, -4.898548), which is approximately 2.4GHz.

[0230] In this case, when the first switch M1 is in the first state, the 1 / 4 wavelength line common mode of the first branch 211 can operate in the first communication frequency band f1 (for example, the frequency band where 2.4GHz is located). Among them, as can be seen from the current distribution diagram shown in (a) of Fig.26 , when operating in the first communication frequency band f1 (for example, the frequency band where 2.4GHz is located), the 1 / 4 wavelength line common mode of the first branch 211 means that the current strong point I1 is located at the feed end F (as Fig. 24BAt the position shown in the figure, the current zero point I0 is located at the open end a1 of the first stub 211. Based on this, the current direction on the first stub 211 can be from the feeding end F (the position where the current strong point I1 is located) to the current zero point I0. Or, the current direction on the first stub 211 can be from the current zero point I0 to the feeding end F (the position where the current strong point I1 is located).

[0231] In addition, as can be seen from the above, the second communication frequency band f2 (for example, the 5GHz frequency band) can be divided into a first sub-communication frequency band f21 (for example, the 5GL frequency band or the 5GH frequency band) and a second sub-communication frequency band f22 (for example, the 5GH frequency band or the 5GL frequency band). Since there is no overlap between the first sub-communication frequency band f21 and the second sub-communication frequency band f22, when the first sub-communication frequency band f21 is the 5GL frequency band, the second sub-communication frequency band f22 is the 5GH frequency band. Conversely, when the second sub-communication frequency band f22 is the 5GL frequency band, the first sub-communication frequency band f21 is the 5GH frequency band. For the convenience of description, the following embodiments take the case where the first sub-communication frequency band f21 is the 5GL frequency band and the second sub-communication frequency band f22 is the 5GH frequency band as an example for illustration.

[0232] Based on this, since in the case where the first switch M1 (as shown in the figure) Fig.22A is in the second state, the electrical length of the first stub 211 can be 2 / 5 to 2 / 3 wavelengths of the second communication frequency band f2 (for example, 1 / 2 wavelength of the second communication frequency band f2), so when the first switch M1 is in the second state (for example, the conducting state), the first stub 211 can generate a second resonance of the second communication frequency band f2. For example, as can be seen from the S11 curve graph shown in the figure Fig.25B the frequency of this second resonance can be the frequency of the resonance frequency point ① (5.158913, -7.059106), which is approximately 5.15GHz.

[0233] In this case, when the first switch M1 is in the second state, the 1 / 2 wavelength loop mode of the first stub 211 can operate in the first sub-communication frequency band f21 (for example, 5GL). Among them, as can be seen from the current distribution graph shown in (b) of the figure Fig.26 when operating in the first sub-communication frequency band f21 (for example, 5GL), the 1 / 2 wavelength loop mode of the first stub 211 means that one of the current strong points I1 is located at the feeding end F (as shown in the figure Fig. 24BThe position where it is shown), another current strong point I2 is located at the position of the open end of the first stub 211, and the current zero point I0 is located between the current strong point I1 and the current strong point I2. There are currents with opposite directions on the first stub 211. For example, a part of the current on the first stub 211 can point from the current strong point I1 to the current zero point I0, and another part of the current on the first stub 211 can point from the current strong point I2 to the current zero point I0. Or, a part of the current on the first stub 211 can point from the current zero point I0 to the current strong point I1, and another part of the current on the first stub 211 can point from the current zero point I0 to the current strong point I2.

[0234] In addition, since when the first switch M1 (as Fig.22A shown) is in the first state or the second state, the electrical length of the second stub 212 can be 1 / 4 wavelength of the second communication frequency band f2 (for example, 5 GHz band), so when the first switch M1 is in the second state or the second state, the second stub 212 can generate a second resonance of the second communication frequency band f2. For example, as Fig.25A or Fig.25B shown in the S11 curve graph, the frequency of this second resonance can be the frequency of the resonance frequency point ② (5.837756, -9.712312), which is about 5.8 GHz.

[0235] In this case, when the first switch M1 is in the second state or the first state, the 1 / 4 wavelength line common mode of the second stub 212 can operate in the first sub-communication frequency band f21 (for example, 5GL). Among them, as Fig.26 shown in the current distribution diagram of (c) in, when operating in the first sub-communication frequency band f21 (for example, 5GL), the 1 / 4 wavelength line common mode of the second stub 212 means that the current strong point I1 is located at the position of the feeding end F (as Fig. 24B shown), and the current zero point I0 is located at one end of the second stub 212 far from the first stub 211. Based on this, the current direction on the second stub 212 can point from the feeding end F (the position where the current strong point I1 is located) to the current zero point I0. Or, the current direction on the second stub 212 can point from the current zero point I0 to the feeding end F (the position where the current strong point I1 is located).

[0236] On this basis, Fig.27A is Fig.22A the antenna system efficiency curve of the antenna structure 20 when the first switch M1 in is in the first state (for example, the cut-off state). When the first stub 211 generates a first resonance of the first communication frequency band f1 (for example, the frequency band where 2.4 GHz is located), it can be seen from Fig.27A that the frequency of this first resonance can be the resonance frequency point ① (2.4, -11.815) and point ② on the curve

[0237] (2.44, -10.295) and point ③ (2.48, -11.982). The frequencies of the above-mentioned resonant frequency points ①, ②, and ③ are all around 2.4 GHz, and the average value of the antenna system efficiency (dB) is around -11.3 dB. In addition, when the second stub 212 generates the second resonance of the second communication band f2, it can continue to be generated by Fig.27A It can be seen that the frequency of this second resonance can be the resonant frequency points ④ (5.8, -7.5382), ⑤ (5.85, -7.79), and ⑥ (5.8, -7.5382) on the curve shown. The frequencies of the above-mentioned resonant frequency points ④, ⑤, and ⑥ are all around 5.8 GHz, and the average value of the antenna system efficiency (dB) is around -7.6 dB.

[0238] In addition, Fig.27B When Fig.22A the first switch M1 in Fig.27B is in the second state (for example, the conducting state), it is the antenna system efficiency curve of the antenna structure 20. When the first stub 211 generates the second resonance of the second communication band f2, the frequency of this second resonance can be

[0239] the resonant frequency points ① (5.25, -7.1176), ② (5.17, -7.573), and ③ (5.33, -7.4909) on the curve shown in

[0240] The above is an example for illustration when the first switch M1 is in the second state (for example, the conducting state), the 1 / 2 wavelength loop mode of the first stub 211 operates in the first sub-communication band f21 (for example, 5GL) so that the first stub 211 generates the second resonance of the second communication band f2, and when the first switch M1 is in the first state (for example, the cut-off state) or the second state (for example, the conducting state), the 1 / 4 wavelength line common mode of the second stub 212 operates in the second sub-communication band f22 (for example, 5GH) so that the second stub 212 generates the second resonance of the second communication band f2.

[0240] In some other embodiments of the present application, components such as capacitors or inductors can be connected to either the end of the first stub 211 or the end of the second stub 212 to adjust the electrical length of either the first stub 211 or the second stub 212. For example, connecting a capacitor to the end of the stub can reduce the electrical length of the stub, or connecting an inductor to the end of the stub can increase the electrical length of the stub. In this way, when the first switch M1 is in the second state (e.g., the conducting state), the 1 / 2 wavelength loop mode of the first stub 211 can operate in the second sub-communication band f22 (e.g., 5GH). And when the first switch M1 is in the first state (e.g., the cutoff state) or the second state (e.g., the conducting state), the 1 / 4 wavelength line common mode of the second stub 212 can operate in the first sub-communication band f21 (e.g., 5GL). For the convenience of description below, all examples are based on Fig.26 the antenna pattern shown.

[0241] As can be seen from the above, when the first switch M1 is in the first state (e.g., the cutoff state), the 1 / 4 wavelength line common mode of the first stub 211 operates in the first communication band f1 (e.g., the band where 2.4 GHz is located). When the first switch M2 is in the second state (e.g., the conducting state), the first stub 211 can be reused for the 1 / 2 wavelength loop mode in the first sub-communication band f21 (e.g., 5GL). Based on this, when the physical length of the first stub 211 is determined, when the electrical length of the first stub 211 satisfies 1 / 4 wavelength of the first communication band f1 (e.g., the band where 2.4 GHz is located), in order to make the electrical length of the first stub 211 also satisfy 1 / 2 wavelength of the first sub-communication band f21 (e.g., 5GL), it is necessary to Fig. 24B set the position of the grounding end G shown closer to the first strip portion 2111. Alternatively, the grounding end G is still set at the end of the fifth strip stub 2115 away from the first strip portion 2111, and a capacitor is set at the end of the fifth strip stub 2115 away from the first strip portion 2111 to reduce the electrical length of the first stub 211, so that the electrical length of the first stub 211 also satisfies 1 / 2 wavelength of the first sub-communication band f21 (e.g., 5GL).

[0242] Based on this, the physical lengths of the first stub 211 and the second stub 212 can be unequal. For example, when the dielectric constant of the antenna bracket 112 (as shown in Figure 5 ) is 2.5 - 3, Fig. 24BThe physical length of the first stub 211 shown can be 15 mm to 25 mm, and the physical length of the second stub 212 can be 5 mm to 10 mm. Examples of the physical length of the first stub 211 and the physical length of the second stub 212 are the same as those described above and will not be elaborated here.

[0243] On this basis, when the 1 / 2 wavelength loop mode of the first stub 211 operates in the first sub-communication frequency band f21 (for example, 5GL), as Fig.28 shown in (a) of [], the zero points (the lighter parts) of the three-dimensional antenna pattern of the antenna structure are located in the plane where o3o4 is located in the attached drawing. When the 1 / 4 wavelength line common mode of the second stub 212 operates in the second sub-communication frequency band f22 (for example, 5GH), as Fig.28 shown in (b) of [], the zero points (the lighter parts) of the three-dimensional antenna pattern of the antenna structure are located at both ends along the vertical direction (i.e., the o4 direction) in the attached drawing.

[0244] In this way, the three-dimensional antenna patterns of the antenna modes corresponding to the first sub-communication frequency band f21 (for example, 5GL) and the second sub-communication frequency band f22 (for example, 5GH) covered by the antenna structure are quite different, and the above two three-dimensional antenna patterns can be orthogonal or approximately orthogonal. Similarly, by switching the first sub-communication frequency band f21 (for example, 5.2 GHz) and the second sub-communication frequency band f22 (for example, 5.8 GHz), the complementary of the defect angles of the three-dimensional patterns of the above two antenna modes can be achieved, so as to alleviate the problem of communication jamming between the wireless earphone 02 and the mobile terminal. Among them, the method of complementary defect angles of different three-dimensional patterns is the same as those described above and will not be elaborated here.

[0245] Some other embodiments of the present application provide a wireless earphone, which also includes an ear cup 10 and an ear stem 11 as Figure 2 shown, and an antenna structure 20, a circuit board 110 and an antenna bracket 112 as Fig.29 shown. The structures of the above ear cup 10, ear stem 11, circuit board 110 and antenna bracket 112 are the same as those described above and will not be elaborated here. In addition, Fig.29 the antenna structure 20 shown can include a first radiator 201, a third radiator 203, a first feeding end F1 and a second feeding end F2. Among them, the first feeding end F1 can be arranged on the first radiator 201, and the first feeding end F1 can divide the first radiator 201 into a first stub 211 and a second stub 212 which are cross-arranged. Among them, the division of the first stub 211 and the second stub 212 is the same as those described above and will not be elaborated here. And, the first stub 211 and the second stub 212 can be asymmetrically arranged with respect to the feeding end F.

[0246] In addition, continue as Fig.29 shown, the above-mentioned third radiator 203 is arranged along the second direction Y on the side of the first radiator 201 away from the earcup 10 (as Figure 2 shown), and the second feeding end F2 can be arranged on the third radiator 203. Exemplarily, the second feeding end F2 can be arranged at the end of the third radiator 203.

[0247] On this basis, the antenna structure 20 can further include the above-mentioned second switch M2 and third switch M3 as Fig.30 shown. Among them, the second switch M2 is arranged between the first feeding end F1 and the circuit board 110. The first end c1 of the second switch M2 is coupled to the first feeding end F1, and the second end c2 of the second switch M2 is coupled to the circuit board 110. The third switch M3 is arranged between the second feeding end F2 and the circuit board 110. The first end c1 of the third switch M3 is coupled to the second feeding end F2, and the second end c2 of the third switch M3 is coupled to the circuit board 110.

[0248] Among them, if the second switch M2 is in the second state (for example, the conducting state) and the third switch M3 is in the first state (for example, the cutoff state), the first stub 211 is used to generate the first resonance of the first communication frequency band f1 (for example, the frequency band where 2.4 GHz is located), and the second stub 212 is used to generate the second resonance of the second communication frequency band f2 (for example, the 5GL frequency band or the 5GH frequency band). In addition, if the second switch M2 is in the first state (for example, the cutoff state) and the third switch M3 is in the second state (for example, the conducting state), the third radiator 203 is used to generate the second resonance of the second communication frequency band f2 (for example, the 5GH frequency band or the 5GL frequency band). The setting manners of the first communication frequency band f1 and the second communication frequency band f2 are the same as those described above and will not be elaborated here.

[0249] Based on this, when the second switch M2 is in the second state (for example, the conducting state) and the third switch M3 is in the first state (for example, the cutoff state), in order to enable the first stub 211 to generate the first resonance of the first communication frequency band f1 and the second stub 212 to generate the second resonance of the second communication frequency band f2, the electrical length of the first stub 211 is 1 / 4 wavelength of the first communication frequency band f1, and the electrical length of the second stub 212 is 1 / 4 wavelength of the second communication frequency band f2. In addition, when the second switch M2 is in the first state (for example, the cutoff state) and the third switch M3 is in the second state (for example, the conducting state), in order to enable the third radiator 203 to generate the second resonance of the second communication frequency band f2, the electrical length of the third radiator 203 is 1 / 4 wavelength of the second communication frequency band f2.

[0250] Based on this, on the antenna bracket 112 (as Figure 5When the dielectric constant of the one shown is 2.5 to 3, the physical length of the first stub 211 can be 15 mm to 25 mm, the physical length of the second stub 212 can be 5 mm to 10 mm. Examples of the physical length of the first stub 211 and the physical length of the second stub 212 are the same as those described above and will not be elaborated here. In addition, the physical length of the third radiator 203 can be 5 mm to 10 mm. The physical length of the third radiator 203 can be 5 mm, 6 mm, 7 mm, 8 mm, 9 mm or 10 mm.

[0251] In this way, by the same token, the wireless earphone 02 with the above antenna structure 20 can cover the first communication frequency band f1 (for example, the frequency band where 2.4 GHz is located), and can also cover the second communication frequency band f2 (including the 5GL band and the 5GH band), so that the communication frequency band between the wireless earphone 02 and the mobile terminal can be switched according to the environment where the user is located. For example, when the interference noise in the surrounding environment is relatively large, by switching to the second communication frequency band f2 (for example, the 5GL band and the 5GH band) to support high-definition communication.

[0252] The following gives Fig.29 an example of the setting method of the first feeding end F1 in Fig.31 As shown, the first stub 211 can be an L-shaped stub, and the first stub 211 can include a first strip portion 2111 and a second strip portion 2112 which are arranged crosswise. As described above, the first strip portion 2111, the second strip portion 2112 and the second stub 212 are connected in sequence to form the above-mentioned first radiator 201. In addition, the strip-shaped second stub 212 is arranged opposite to the first strip portion 2111. The setting method and technical effect of the first strip portion 2111, the second strip portion 2112 and the second stub 212 in the ear stem 11 are the same as those described above and will not be elaborated here. Based on this, the first feeding end F1 can be located on the side of the second stub 212 facing the second strip portion 2112.

[0253] On this basis, when the second switch M2 is in the second state (for example, the conducting state) and the third switch M3 is in the first state (for example, the cutoff state), when the length of the part of the first stub 211 along the first direction Z cannot make the electrical length of the first stub 211 be 1 / 4 wavelength of the first communication frequency band f1 (for example, the frequency band where 2.4 GHz is located), as Fig.31 shown, the first stub 211 can include a fifth strip portion 2115 which is arranged crosswise with the first strip portion 2111. The fifth strip portion 2115, the first strip portion 2111 and the second stub 212 are connected in sequence.

[0254] Based on this, continue as Fig.31As shown, at one end of the fifth mold part 2115 away from the first mold part 2111, there is a first distance H1 between it and one end of the second branch 212 away from the earphone housing (i.e., the lower end of the second branch 212). The value of the first distance H1 and its technical effect are the same as those described above, and will not be elaborated here. In addition, between the part of the first branch 211 arranged along the first direction Z (for example, the first mold part 2111) and the part of the second branch 212 arranged along the first direction Z (for example, the fourth mold part 2124), there is a third distance H3. The value of the third distance H3 and its technical effect are the same as those described above, and will not be elaborated here.

[0255] On this basis, continue as Fig.31 As shown, in order to reduce the influence on the antenna patterns of the first radiator 201 and the third radiator 203 caused by the relatively short distance between one end of the first radiator 201 facing the third radiator 203 and the third radiator 203, there may be a fourth distance H4 between one end of the first branch 211 facing the third radiator 203 and the third radiator 203, and H4 can be 0.4 mm - 1 mm. For example, the fourth distance H4 can be 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, or 1 mm.

[0256] Or, for another example, as Fig.32 As shown, the second branch 212 can be an L-shaped branch, and the second branch 212 can include a third mold part 2123 and a fourth mold part 2124 arranged crosswise. As described above, the first branch 211, the third mold part 2123, and the fourth mold part 2124 are connected in sequence to form the above-mentioned first radiator 201. In addition, at least a part of the first branch 211 along the first direction Z can be arranged opposite to the fourth mold part 2124. The arrangement method and technical effect of the third mold part 2123, the fourth mold part 2124, and the first branch 211 in the earpiece 11 are the same as those described above, and will not be elaborated here. Based on this, the first feeding end F1 can be located on the side of the third mold part 2123 facing the first branch 211.

[0257] The above is an example illustration with Fig.31 the first feeding end F1 located on the long side L1 on the left side of the earpiece 11, and Fig.32 the first feeding end F1 located on the long side L1 on the right side of the earpiece 11 in Figure 3 As shown, when the user wears the wireless earphone 02, both of the above two setting methods can make the feeding end F located at a position far from the user's auricle, so as to reduce the absorption of the feeding signal by the human body.

[0258] Taking the Fig.31 antenna structure 20 shown as an example, since at the second switch M2 (such as Fig.30When the second switch M2 (as shown) is in the second state (e.g., conducting state) and the third switch M3 is in the first state (e.g., cutoff state), the electrical length of the first stub 211 can be 1 / 4 wavelength of the first communication frequency band f1 (e.g., the frequency band where 2.4 GHz is located). Therefore, the first stub 211 can generate a first resonance of the first communication frequency band f1. Exemplarily, as Fig.33A shown in the S11 curve graph, the frequency of this first resonance can be the frequency of the resonance frequency point ① (2.449, -2.051059), which is approximately 2.4 GHz.

[0259] In this case, when the second switch M2 (as Fig.30 shown) is in the second state (e.g., conducting state) and the third switch M3 is in the first state (e.g., cutoff state), then the 1 / 4 wavelength line common mode of the first stub 211 can operate in the first communication frequency band f1 (e.g., the frequency band where 2.4 GHz is located). Among them, as Fig.34 shown in the current distribution graph of (a) in, when operating in the first communication frequency band f1 (e.g., the frequency band where 2.4 GHz is located), the 1 / 4 wavelength line common mode of the first stub 211 means that the current strong point I1 is located at the position of the first feeding end F1 (as Fig.31 shown), and the current zero point I0 is located at the open end of the first stub 211. Based on this, the current direction on the first stub 211 can be from the first feeding end F1 (the position where the current strong point I1 is located) to the current zero point I0. Or, the current direction on the first stub 211 can be from the current zero point I0 to the first feeding end F1 (the position where the current strong point I1 is located).

[0260] In addition, as can be seen from the above, the second communication frequency band f2 (e.g., 5 GHz frequency band) can be divided into a first sub - communication frequency band f21 (e.g., 5GL frequency band) and a second sub - communication frequency band f22 (e.g., 5GH frequency band). Based on this, since when the second switch M2 (as Fig.30 shown) is in the second state (e.g., conducting state) and the third switch M3 is in the first state (e.g., cutoff state), the electrical length of the second stub 212 is 1 / 4 wavelength of the second communication frequency band f2 (e.g., 5GL frequency band), so this second stub 212 can generate a second resonance of the second communication frequency band f2. Exemplarily, as Fig.33A shown in the S11 curve graph, the frequency of this second resonance can be the frequency of the resonance frequency point ② (5.082535, -8.128341), which is approximately 5.08 GHz.

[0261] In this case, when the second switch M2 (as Fig.30When the second switch M2 is in the second state (e.g., on state) and the third switch M3 is in the first state (e.g., off state), the quarter-wavelength line common mode of the second stub 212 is used to operate in the first sub-communication frequency band f21 (e.g., 5G L band). Among them, as Fig.34 It can be known from the current distribution diagram shown in (b) of Fig.31 that when operating in the first sub-communication frequency band f21, the quarter-wavelength line common mode of the second stub 212 means that the current strong point I1 is located at the first feeding end F1 (as

[0262] shown), and the current zero point I0 is located at the end of the second stub 212. Based on this, the current direction on the second stub 212 can point from the first feeding end F1 (the position where the current strong point I1 is located) to the current zero point I0. Or, the current direction on the second stub 212 can point from the current zero point I0 to the first feeding end F1 (the position where the current strong point I1 is located). Fig.33B It can be known from the S11 curve diagram shown in

[0263] that the frequency of this second resonance can be the frequency of the resonance frequency point ① (5.941, -9.300857), which is about 5.94 GHz. Fig.34 When the second switch M2 is in the first state (e.g., off state) and the third switch M3 is in the second state (e.g., on state), the quarter-wavelength line common mode of the third radiator 203 is used to operate in the second sub-communication frequency band f22 (e.g., 5G H band). Among them, as Fig.31 It can be known from the current distribution diagram shown in (c) of

[0264] that when operating in the second sub-communication frequency band f22 (e.g., 5G H band), the quarter-wavelength line common mode of the third radiator 203 means that the current strong point I2 is located at the second feeding end F2 (as Fig.35A for Fig.31 the second switch M2 in Fig.30The antenna system efficiency curve of the antenna structure 20 when the second switch M2 (as shown) is in the second state (e.g., conducting state) and the third switch M3 is in the first state (e.g., cutoff state). In the case where the first stub 211 generates a first resonance in the first communication band f1 (e.g., the band where 2.4 GHz is located), it can be seen from Fig.35A that the frequency of the first resonance can be the resonance frequency points ① (2.4, -11.69), ② (2.44, -953), and ③ (2.48, -13.258) on the curve. The frequencies of the above resonance frequency points ①, ②, and ③ are all around 2.4 GHz, and the average value of the antenna system efficiency (dB) is around -11.9 dB. In addition, in the case where the second stub 212 generates a second resonance in the second communication band f2, it can continue to be seen from Fig.27A that the frequency of the second resonance can be the resonance frequency points ④ (5.17, -9.1165), ⑤ (5.225, -8.1108), and ⑥ (5.33, -9.5794) on the curve. The frequencies of the above resonance frequency points ④, ⑤, and ⑥ are all around 5.2 GHz, and the average value of the antenna system efficiency (dB) is around -8.9 dB.

[0265] In addition, Fig.35B For Fig.31 the antenna system efficiency curve of the antenna structure 20 when the second switch M2 in [] is in the first state (e.g., cutoff state) and the third switch M3 is in the second state (e.g., conducting state). In the case where the third radiator 203 generates a second resonance in the second communication band f2, the frequency of the second resonance can be Fig.35B the resonance frequency points ① (5.75, -6.1648), ② (5.8, -5.7629), and ③ (5.85, -5.7965) on the curve shown. The frequencies of the above resonance frequency points ①, ②, and ③ are all around 5.8 GHz, and the average value of the antenna system efficiency (dB) is around -5.9 dB.

[0266] The above is an example for illustration when the second switch M2 (as shown in Fig.30 ) is in the second state (e.g., conducting state) and the third switch M3 is in the first state (e.g., cutoff state), the 1 / 4 wavelength line of the second stub 212 operates in common mode in the first sub-communication band f21 (e.g., 5GL) so that the second stub 212 generates a second resonance in the second communication band f2, and when the second switch M2 is in the first state (e.g., cutoff state) and the third switch M3 is in the second state (e.g., conducting state), the 1 / 4 wavelength line of the third radiator 203 operates in common mode in the second sub-communication band f22 (e.g., 5GH) so that the third radiator 203 generates a second resonance in the second communication band f2.

[0267] In some other embodiments of the present application, components such as a capacitor or an inductor can be connected to either the end of the second stub 212 or the end of the third radiator 203 to adjust the electrical length of any one of the second stub 212 or the third radiator 203, so that when the second switch M2 (as Fig.30 shown) is in the second state (e.g., conducting state) and the third switch M3 is in the first state (e.g., cutoff state), the quarter-wavelength line of the second stub 212 operates in the second sub-communication frequency band f22 (e.g., 5 GHz) in common mode. When the second switch M2 is in the first state (e.g., cutoff state) and the third switch M3 is in the second state (e.g., conducting state), the quarter-wavelength line of the third radiator 203 operates in the first sub-communication frequency band f21 (e.g., 5 GHz) in common mode.

[0268] On this basis, by the same token, the three-dimensional antenna pattern differences of the antenna modes corresponding to the first sub-communication frequency band f21 (e.g., 5 GHz) and the second sub-communication frequency band f22 (e.g., 5 GHz) covered by the above antenna structure 20 are relatively large, and the above two three-dimensional antenna patterns can be orthogonal or approximately orthogonal. Therefore, by switching between the first sub-communication frequency band f21 (e.g., 5.2 GHz) and the second sub-communication frequency band f22 (e.g., 5.8 GHz), the complementary of the defect angles of the above two antenna mode three-dimensional patterns can be achieved, so as to alleviate the problem of communication jamming between the wireless earphone 02 and the mobile terminal. Among them, the method of complementary defect angles of different three-dimensional patterns is the same as described above and will not be elaborated here.

[0269] Some other embodiments of the present application provide a wireless earphone, which also includes an ear cup 10 and an ear stem 11 as Figure 2 shown, and a circuit board 110 and an antenna bracket 112 as Fig.29 shown. The structures of the above ear cup 10, ear stem 11, circuit board 110 and antenna bracket 112 are the same as above and will not be elaborated here. In addition, the above wireless earphone may further include an antenna structure 20 as Fig.36 shown. The antenna structure 20 may include a first radiator 201, a third radiator 203, a feeding end F, and a grounding end G. Among them, the above feeding end F may be disposed on the first radiator 201, and the feeding end F may divide the first radiator 201 into a first stub 211 and a second stub 212. The division of the first stub 211 and the second stub 212 is the same as described above and will not be elaborated here. In addition, the grounding end G is disposed on the third radiator 203, and the setting manner of the third radiator 203 is the same as described above and will not be elaborated here.

[0270] On this basis, continue as Fig.36As shown, the first stub 211 is used to generate a first resonance in the first communication frequency band f1 (for example, the frequency band where 2.4 GHz is located). For example, the electrical length of the first stub 211 is 1 / 4 wavelength of the first communication frequency band f1. At this time, the 1 / 4 wavelength line common mode of the first stub 211 can operate in the first communication frequency band f1 (for example, the frequency band where 2.4 GHz is located). Among them, the current distribution on the first stub 211 can be as shown in Fig.34 as shown in (a).

[0271] In addition, the second stub 212 is used to generate a second resonance in the second communication frequency band f2 (for example, the 5 GHz frequency band), and the third radiator 203 is used to generate a second resonance in the second communication frequency band (for example, the 5 GHz frequency band). When the second communication frequency band f2 is divided into a first sub-communication frequency band f21 (for example, the 5GL frequency band) and a second sub-communication frequency band f22 (for example, the 5GH frequency band), the electrical length of the second stub 212 is 1 / 4 wavelength of the first sub-communication frequency band f21 (for example, the 5GL frequency band). At this time, the 1 / 4 wavelength line common mode of the second stub 212 can operate in the first sub-communication frequency band f21 (for example, the 5GL frequency band). Among them, the current distribution on the second stub 212 can be as shown in Fig.34 as shown in (b). In addition, the electrical length of the second stub 212 is 1 / 4 wavelength of the first sub-communication frequency band f21 (for example, the 5GL frequency band). At this time, the 1 / 4 wavelength line common mode of the third radiator 203 can operate in the second sub-communication frequency band f22 (for example, the 5GH frequency band). Among them, the current distribution on the third radiator 203 can be as shown in Fig.34 as shown in (c). The above current distribution and antenna pattern are the same as those described above, and will not be elaborated here.

[0272] Some other embodiments of the present application provide a wireless earphone, which also includes an ear cup 10 and an ear stem 11 as shown in Figure 2 , and an antenna structure 20, a circuit board 110 and an antenna bracket 112 as shown in Fig.37 . The structures of the above ear cup 10, ear stem 11, circuit board 110 and antenna bracket 112 are the same as those above, and will not be elaborated here. In addition, Fig.37 the antenna structure 20 shown can include a first radiator 201 and a feeding end F. Among them, the above feeding end F can be arranged on the first radiator 201, and the feeding end F can divide the first radiator 201 into a first stub 211 and a second stub 212 arranged crosswise. The division of the first stub 211 and the second stub 212 is the same as that described above, and will not be elaborated here. And, the first stub 211 and the second stub 212 can be asymmetrically arranged with respect to the feeding end F.

[0273] Based on this, the first stub 211 is used to generate a first resonance of the first communication frequency band f1 (for example, the frequency band where 2.4 GHz is located), and the first stub 211 is also used to generate a second resonance of the second communication frequency band f2 (for example, 5GL frequency band or 5GH frequency band). In addition, the second stub 212 is used to generate a second resonance of the second communication frequency band f2 (for example, 5GH frequency band or 5GL frequency band). The setting methods of the first communication frequency band f1 and the second communication frequency band f2 are the same as those described above and will not be elaborated here.

[0274] Based on this, as can be seen from the above, in order for the first stub 211 to generate a first resonance of the first communication frequency band f1 (for example, the frequency band where 2.4 GHz is located), the electrical length of the first stub 211 can be 1 / 4 wavelength of the first communication frequency band f1. Based on this, the physical length of the first stub 211 can be 15 mm to 25 mm. By way of example, as Fig.38A can be seen from the S11 curve graph shown, the frequency of this first resonance can be the frequency of the resonance point ① (2.359, -2.560236), which is approximately 2.4 GHz. Or, as Fig.38B can be seen from the S11 curve graph shown, the frequency of this first resonance can be the frequency of the resonance point ① (2.359, -2.981009), which is approximately 2.4 GHz.

[0275] In this case, the 1 / 4 wavelength line common mode of the first stub 211 can operate in the first communication frequency band f1. Among them, as Fig.39 can be seen from the current distribution graph shown in (a) of, when operating in the first communication frequency band f1 (for example, the frequency band where 2.4 GHz is located), the 1 / 4 wavelength line common mode of the first stub 211 means that the current strong point I1 is located at the position of the feeding end F (as Fig.37 shown), and the current zero point I0 is located at the open end of the first stub 211 ( Fig.37 the position of a1 shown). Based on this, the current direction on the first stub 211 can point from the position where the current strong I1 is located to the current zero point I0. Or, the current direction on the first stub 211 can point from the current zero point I0 to the position where the current strong I1 is located.

[0276] In addition, in the case where the second communication frequency band f2 includes a first sub-communication frequency band f21 (for example, 5GL frequency band) and a second sub-communication frequency band f22 (for example, 5GH frequency band), by way of example, in order for the second stub 212 to generate a second resonance of the second communication frequency band f2, the electrical length of this second stub is 1 / 4 wavelength of the second communication frequency band f2, for example, the first sub-communication frequency band f21 (for example, 5GL frequency band) in the second communication frequency band f2. By way of example, the physical length of the second stub 212 can be 5 mm to 10 mm. By way of example, as Fig.38AAs can be seen from the S11 curve diagram shown, the frequency of the second resonance can be the frequency of resonance point ② (5.014, -7.841322), which is approximately 5 GHz. Or, as Fig.38B As can be seen from the S11 curve diagram shown, the frequency of the first resonance can be the frequency of resonance point ② (5.086, -7.839293), which is approximately 5 GHz.

[0277] In this case, the 1 / 4 wavelength line common mode of the second branch 212 can be used to operate in the first sub-communication frequency band f21 (for example, 5G L band). Among them, as Fig.39 can be seen from the current distribution diagram shown in (b) of , when operating in the first sub-communication frequency band f21 (for example, 5G L band), the 1 / 4 wavelength line common mode of the second branch 212 means that the current strong point I1 is located at the feeding end F (as Fig.37 shown), and the current zero point I0 is located at the end of the second branch 212. Based on this, the current direction on the first branch 211 can point from the position where the current strong I1 is located to the current zero point I0. Or, the current direction on the first branch 211 can point from the current zero point I0 to the position where the current strong I1 is located.

[0278] On this basis, as can be seen from the above, as Fig.12 can be seen, the first branch 211 can also be used to generate the third resonance of the third communication frequency band f3 (for example, 6 GHz or 5 GHz). Exemplarily, as Fig.38A can be seen from the S11 curve diagram shown, the frequency of the third resonance can be the frequency of resonance point ③ (7.219, -6.754191), which is approximately 7 GHz.

[0279] Based on this, in order to enable the above antenna structure 20 to also cover the second sub-communication frequency band f22 (for example, 5G H band), the partial line width of the first branch 211 can be adjusted so that the second branch 212 can generate the second resonance of the second communication frequency band f2. Exemplarily, as Fig.38B can be seen from the S11 curve diagram shown, the frequency of the third resonance can be the frequency of resonance point ③ (5.972098, -12.36011), which is approximately 5.9 GHz.

[0280] In this case, the 3 / 4 wavelength line common mode of the first branch 211 operates in the second sub-communication frequency band f22 (for example, 5G H band). Among them, as Fig.39 can be seen from the current distribution diagram shown in (c) of , when operating in the second sub-communication frequency band f22 (for example, 5G H band), the 3 / 4 wavelength line common mode of the first branch 211 means that one of the current strong points I1 is located at the feeding end F (as Fig.37 shown), and one of the current zero points (point I0a) is located at the open end of the first branch 211 ( Fig.37 the position a1 shown in the figure). In addition, there is another current strong point I2 and a current zero point I0b between the current strong point I1 and the current zero point I0a. The current strong point I2 is arranged close to the current zero point I0a, and the current zero point I0b is arranged close to the current strong point I1. Based on this, the current direction on the first stub 211 can be from the current strong point I1 to the current zero point I0b, from the current strong point I2 to the current zero point I0b, and from the current zero point I0a to the current strong point I2. Or, the current direction on the first stub 211 can be from the current zero point I0b to the current strong point I1, from the current zero point I0b to the current strong point I2, and from the current strong point I2 to the current zero point I0a.

[0281] Based on this, in order to make the 3 / 4 wavelength line of the first stub 211 operate in the second sub-communication frequency band f22 (for example, 5GH frequency band) in common mode, the line width of a part of the first stub 211 can be adjusted. In some embodiments, the strong electric field point can be equivalent to capacitive loading. Therefore, when the line width of the radiator at the position of the current strong point increases, the equivalent capacitance of the radiator increases. In this case, according to the formula of the resonant frequency f0, such as the following formula (1), it can be known that when the capacitance C increases, the resonant frequency f0 will decrease.

[0282] Therefore, in the case where the strong electric field point is equivalent to capacitive loading, in order to reduce the operating frequency band of the 3 / 4 wavelength line of the first stub 211 in common mode from the third frequency band f3 (for example, 7GHz) to the second sub-communication frequency band f22 (for example, 5GH frequency band), it is possible to Fig.39 in the first stub 211 shown in (c) of, widen the line width of the part located at the current zero point I0b to form Fig.40 the second part 21102 shown in the figure. The second part 21102 has a second line width S2. Among them, the electrical length of the second part 21102 can be 1 / 4 wavelength of the second communication frequency band f2, for example, the second sub-communication frequency band f22 (for example, 5GH frequency band).

[0283]

[0284] In addition, in some embodiments, the current strong point can be equivalent to inductive loading. Therefore, when the line width of the radiator at the position of the current strong point becomes thinner, the current path on the radiator increases, making the equivalent inductance of the radiator increase. In this case, according to the formula of the resonant frequency f0, such as the above formula (1), it can be known that when the inductance L increases, the resonant frequency f0 will decrease.

[0285] Therefore, in order to reduce the operating frequency band of the 3 / 4 wavelength line of the first stub 211 in common mode from the third frequency band f3 (for example, 7GHz) to the second sub-communication frequency band f22 (for example, 5GH frequency band) in the case where the current strong point can be equivalent to inductive loading, it is possible to Fig.39 In the first stub 211 shown in (c) therein, the line width of the part located at the current strong point I2 is reduced to form Fig.40 the third part 21103 shown, and the third part 21103 has a third line width S3. Among them, the electrical length of the third part 21103 can be 1 / 4 wavelength of the second communication frequency band f2, such as the second sub-communication frequency band f22 (for example, 5GH band).

[0286] In this case, continue as Fig.40 shown, the part from the feeding end F to the open end a1 in the first stub 211 can sequentially include a first part 21101, the above-mentioned second part 21102, and the above-mentioned third part 21103. The first part 21101 has a first line width S1, S1 < S2, S3 < S1. Among them, the electrical length of the first part 21101 can be 1 / 4 wavelength of the second communication frequency band f2, such as the second sub-communication frequency band f22 (for example, 5GH band).

[0287] In this way, the 1 / 4 wavelength line of the first stub 211 can operate in common mode at the first communication frequency band f1 (for example, the frequency band where 2.4GHz is located), and the 3 / 4 wavelength line of the first stub 211 can operate in common mode at the second sub-communication frequency band f22 (for example, 5GH band). Similarly, the wireless earphone 02 with the above antenna structure 20 can cover the first communication frequency band f1 (for example, the frequency band where 2.4GHz is located), and can also cover the second communication frequency band f2 (including 5GL band and 5GH band), so that the communication frequency band between the wireless earphone 02 and the mobile terminal can be switched according to the environment where the user is located. For example, when the ambient interference noise is large, by switching to the second communication frequency band f2 (for example, 5GL band and 5GH band) to support high-definition communication.

[0288] Based on this, Fig.41 is Fig.40 the antenna system efficiency curve of the antenna structure 20 shown. When the first stub 211 generates the first resonance of the first communication frequency band f1 (for example, the frequency band where 2.4GHz is located), the frequency of the first resonance can be Fig.41 the resonance frequency points ①(2.4, -12.804), ②(2.44, -10.726), and ③(2.48, -13.838) on the curve shown. The frequencies of the above resonance frequency points ①, ②, and ③ are all around 2.4GHz, and the average value of the antenna system efficiency (dB) is around -12.4dB.

[0289] When the second stub 212 generates the second resonance of the second communication frequency band f2, such as the first sub-communication frequency band f21 (for example, 5GL band), the frequency of the second resonance can be Fig.41The resonant frequency points ④ (5.17, -8.6998), ⑤ (5.25, -8.9281), and ⑥ (5.33, -10.526) on the shown curve. The frequencies of the above-mentioned resonant frequency points ④, ⑤, and ⑥ are all around 5 GHz, and the average value of the antenna system efficiency (dB) is around -9.4 dB.

[0290] In addition, when the first stub 211 generates a second communication band f2, for example, in the case of the second resonance of the second sub-communication band f22 (for example, the 5GH band), the frequency of this second resonance can be Fig.41 The resonant frequency points ⑦ (5.75, -8.3314), ⑧ (5.8, -6.6409), and ⑨ (5.85, -6.2891) on the shown curve. The frequencies of the above-mentioned resonant frequency points ⑦, ⑧, and ⑨ are all around 5.8 GHz, and the average value of the antenna system efficiency (dB) is around -7.1 dB.

[0291] On this basis, when the 1 / 4 wavelength line of the second stub 212 operates in common mode in the first sub-communication band f21 (for example, 5GL), as Fig.42 shown in (a) of, the null points (the lighter parts) of the three-dimensional antenna pattern of the antenna structure are located at both ends along the vertical direction (i.e., the o4 direction) in the attached figure. When the 3 / 4 wavelength line of the first stub 211 operates in common mode in the second sub-communication band f22 (for example, 5GH), as Fig.42 shown in (b) of, the null points (the lighter parts) of the three-dimensional antenna pattern of the antenna structure are located in the plane where o3o4 is located in the attached figure. In this way, the differences between the three-dimensional antenna patterns of the antenna modes corresponding to the first sub-communication band f21 (for example, 5GL) and the second sub-communication band f22 (for example, 5GH) covered by the antenna structure are relatively large, and the above two three-dimensional antenna patterns can be orthogonal or approximately orthogonal. Similarly, by switching the first sub-communication band f21 (for example, 5.2 GHz) and the second sub-communication band f22 (for example, 5.8 GHz), the complementary of the defect angles of the above two three-dimensional antenna patterns of the antenna modes can be achieved, so as to alleviate the problem of communication jamming between the wireless earphone 02 and the mobile terminal. Among them, the method of complementary defect angles of different three-dimensional antenna patterns is the same as described above, and will not be elaborated here.

[0292] The following gives an example of the setting method of the feeding end F in Fig.40 , for example, as Figure 43As shown, the first branch 211 may be an L-shaped branch, and the first branch 211 may include a first strip-shaped portion 2111 and a second strip-shaped portion 2112 that are cross-arranged. As described above, the first strip-shaped portion 2111, the second strip-shaped portion 2112 and the second branch 212 are sequentially connected to form the above-mentioned first radiator 201. In addition, the strip-shaped second branch 212 is arranged opposite to the first strip-shaped portion 2111. The arrangement of the first strip-shaped portion 2111, the second strip-shaped portion 2112 and the second branch 212 in the ear handle 11 and the technical effects are the same as described above and will not be repeated here. Based on this, the feeding end F may be located on the side of the second branch 212 facing the second strip-shaped portion 2112.

[0293] In addition, the first branch 211 may further include a fifth strip-shaped portion disposed on the side of the first strip-shaped portion 2111 away from the ear bag. The method and technical effect of the fifth strip-shaped portion are the same as those described above and will not be repeated here.

[0294] Or, if Figure 44 As shown, for another example, the second branch 212 may be an L-shaped branch, and the second branch 212 may include a third strip-shaped portion 2123 and a fourth strip-shaped portion 2124 that are cross-arranged. As described above, the first branch 211, the third strip-shaped portion 2123, and the fourth strip-shaped portion 2124 are sequentially connected to form the above-mentioned first radiator 201. In addition, at least a portion of the first branch 211 along the first direction Z may be arranged relative to the fourth strip-shaped portion 2124. The arrangement manner and technical effects of the third strip-shaped portion 2123, the fourth strip-shaped portion 2124, and the first branch 211 in the ear handle 11 are the same as described above and will not be repeated here. Based on this, the feeding end F may be located on the side of the third strip-shaped portion 2123 facing the first branch 211.

[0295] In addition, the spacing between the strip-shaped portions and the branches is set in the same manner as described above and will not be repeated here.

[0296] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A wireless earphone, characterized in that, include: Ear bag; An ear handle is arranged along a first direction, and one end of the ear handle facing the ear bag is connected to the ear bag; The antenna structure is arranged in the ear handle, and the antenna structure includes: The first radiator; A feeding end is arranged on the first radiator, and the feeding end divides the first radiator into a first branch and a second branch; the first branch has an open end on a side away from the ear bag; a portion of the first branch along the first direction and a portion of the second branch along the first direction are arranged opposite to each other; A second radiator is arranged along the first direction on a side of the second branch away from the ear bag, and a gap is formed between the second radiator and the second branch; A ground terminal, arranged on the second radiator; The first branch is used to generate a first resonance in a first communication frequency band, and the second branch and the second radiator are used to generate a second resonance in a second communication frequency band; any frequency in the second communication frequency band is greater than any frequency in the first communication frequency band.

2. The wireless headset according to claim 1, characterized in that: The first branch is an L-shaped branch, the first branch includes a first strip-shaped portion and a second strip-shaped portion, the first strip-shaped portion is arranged along the first direction, the second strip-shaped portion is arranged along the second direction, and the second direction intersects the first direction; the first strip-shaped portion, the second strip-shaped portion and the second branch are connected in sequence; the second strip-shaped portion is located on a side of the first strip-shaped portion facing the ear bag; The second branch is a strip-shaped branch and is arranged along the first direction; the second branch is arranged opposite to the first strip-shaped portion; The feeding end is located at a side of the second branch away from the second radiator.

3. The wireless headset according to claim 2, characterized in that: The second branch is an L-shaped branch, and the second branch includes a third strip-shaped portion and a fourth strip-shaped portion, the third strip-shaped portion is arranged along the second direction, the fourth strip-shaped portion is arranged along the first direction, and the second direction intersects the first direction; the first branch, the third strip-shaped portion, and the fourth strip-shaped portion are connected in sequence; the third strip-shaped portion is located on a side of the fourth strip-shaped portion facing the ear bag, and the gap is provided between the fourth strip-shaped portion and the second radiator; At least a portion of the first branch along the first direction is arranged opposite to the fourth strip-shaped portion; The feeding end is located on a side of the third strip-shaped portion facing the first branch.

4. The wireless headset according to any one of claims 1 to 3, characterized in that: The first branch node includes a first strip-shaped portion and a fifth strip-shaped portion, the first strip-shaped portion is arranged along the first direction, and the fifth strip-shaped portion is arranged along the second direction; the fifth strip-shaped portion, the first strip-shaped portion and the second branch node are connected in sequence; The first strip-shaped portion and the fourth strip-shaped portion are arranged opposite to each other.

5. The wireless headset according to claim 4, characterized in that: A first distance H1 is present between one end of the fifth strip-shaped portion facing away from the first strip-shaped portion and one end of the second radiator facing away from the ear bag, where H1≥1 mm.

6. The wireless headset according to any one of claims 1 to 5, characterized in that: The ratio of the physical length of the first branch to the physical length of the second branch is between 1.5:1 and 2.5:

1.

7. The wireless earphone according to any one of claims 1-6, characterized in that, The electrical length of the first branch is 1 / 4 wavelength of the first communication frequency band, and the electrical lengths of the second branch and the second radiator are respectively 1 / 4 wavelength of the second communication frequency band.

8. The wireless headset according to any one of claims 1 to 7, characterized in that: The width of the gap is between 0.4 mm and 1 mm.

9. The wireless headset according to any one of claims 1 to 8, characterized in that: A second distance H2 is formed between a portion of the first branch arranged along the first direction and the second radiator, where H2≥0.5 mm.

10. The wireless earphone according to any one of claims 1-9, characterized in that, The second communication frequency band is divided into a first sub-communication frequency band and a second sub-communication frequency band, any frequency in the first sub-communication frequency band is less than any frequency in the second sub-communication frequency band, and the second resonance includes a first sub-resonance corresponding to the first sub-communication frequency band and a second sub-resonance corresponding to the second sub-communication frequency band; The first resonance corresponds to a 1 / 4 wavelength line common mode of the first branch; The first sub-resonance corresponds to a 1 / 2 wavelength slot common mode of the second branch node and the second radiator, wherein the current directions of the second branch node and the radiator are the same; The second sub-resonance corresponds to a 1 / 2 wavelength slot differential mode of the second branch and the second radiator, wherein the current directions of the second branch and the radiator are opposite.

11. The wireless headset according to claim 10, characterized in that: The first branch is also used to generate a third resonance in a third communication frequency band, and the third resonance corresponds to a 3 / 4 wavelength line common mode of the first branch; Among them, any frequency in the third communication frequency band is greater than any frequency in the second communication frequency band.

12. The wireless headset according to any one of claims 1 to 11, characterized in that: The wireless headset also includes an antenna bracket, which is arranged in the ear handle, and the antenna structure is arranged on the antenna bracket; the dielectric constant of the antenna bracket is 2.5-3, the physical length of the first branch is 15mm~25mm, and the physical length of the second branch is 5mm~10mm; the physical length of the second radiator is 5mm~10mm.

13. A wireless earphone, characterized in that, include: Ear bag; An ear handle is arranged along a first direction, and one end of the ear handle facing the ear bag is connected to the ear bag; The antenna structure is arranged in the ear handle, and the antenna structure includes: The first radiator; A feeding end is arranged on the first radiator, and the feeding end divides the first radiator into a first branch and a second branch; a portion of the first branch along the first direction and a portion of the second branch along the first direction are arranged opposite to each other; A ground terminal, arranged on the first branch; a floor having a gap therebetween with at least a portion of the first radiator; A first switch is arranged between the ground terminal and the floor, wherein a first end of the first switch is coupled to the ground terminal, and a second end of the first switch is coupled to the floor; Wherein, if the first switch is in the first state, the first branch is used to generate a first resonance in a first communication frequency band; the second branch is used to generate a second resonance in a second communication frequency band; If the first switch is in the second state, the first branch is used to generate a second resonance in the second communication frequency band; the second branch is used to generate a second resonance in the second communication frequency band; Any frequency in the second communication frequency band is greater than any frequency in the first communication frequency band.

14. The wireless headset according to claim 13, characterized in that: If the first switch is in the first state, the electrical length of the first branch is 1 / 4 wavelength of the first communication frequency band; the electrical length of the second branch is 1 / 4 wavelength of the second communication frequency band; If the first switch is in the second state, the electrical length of the first branch is 2 / 5 to 2 / 3 of the wavelength of the second communication frequency band; the electrical length of the second branch is 1 / 4 of the wavelength of the second communication frequency band.

15. A wireless earphone, characterized in that, include: Ear bag; An ear handle is arranged along a first direction, and one end of the ear handle facing the ear bag is connected to the ear bag; The antenna structure is arranged in the ear handle, and the antenna structure includes: The first radiator; A first feeding end is arranged on the first radiator, and the first feeding end divides the first radiator into a first branch and a second branch; a portion of the first branch along the first direction and a portion of the second branch along the first direction are arranged opposite to each other; A third radiator is arranged along the second direction on a side of the first radiator away from the ear bag; A second feeding end is arranged on the third radiator; A circuit board is arranged in the ear handle; A second switch is provided between the first feeding terminal and the circuit board, wherein a first end of the second switch is coupled to the first feeding terminal, and a second end of the second switch is coupled to the circuit board; A third switch is provided between the second feeding terminal and the circuit board, a first end of the third switch is coupled to the second feeding terminal, and a second end of the third switch is coupled to the circuit board; Wherein, if the second switch is in the second state and the third switch is in the first state, the first branch is used to generate a first resonance in a first communication frequency band; the second branch is used to generate a second resonance in a second communication frequency band; If the second switch is in the first state and the third switch is in the second state, the third radiator is used to generate a second resonance in the second communication frequency band; Any frequency in the second communication frequency band is greater than any frequency in the first communication frequency band.

16. The wireless headset according to claim 15, characterized in that: If the second switch is in the second state and the third switch is in the first state, the electrical length of the first branch is 1 / 4 wavelength of the first communication frequency band; the electrical length of the second branch is 1 / 4 wavelength of the second communication frequency band; If the second switch is in the first state and the third switch is in the second state, the electrical length of the third radiator is 1 / 4 wavelength of the second communication frequency band.

17. A wireless earphone, characterized in that, include: Ear bag; An ear handle is arranged along a first direction, and one end of the ear handle facing the ear bag is connected to the ear bag; The antenna structure is arranged in the ear handle, and the antenna structure includes: The first radiator; A feeding end is arranged on the first radiator, and the feeding end divides the first radiator into a first branch and a second branch; a portion of the first branch along the first direction and a portion of the second branch along the first direction are arranged opposite to each other; A third radiator is arranged along a second direction on a side of the first radiator away from the ear bag; the first direction intersects with the second direction; A ground terminal, arranged on the third radiator; Wherein, the first branch is used to generate a first resonance in a first communication frequency band; the second branch is used to generate a second resonance in a second communication frequency band; and the third radiator is used to generate a second resonance in the second communication frequency band; Any frequency in the second communication frequency band is greater than any frequency in the first communication frequency band.

18. The wireless headset according to claim 17, characterized in that: The electrical length of the first branch is 1 / 4 wavelength of the first communication frequency band; the electrical length of the second branch is 1 / 4 wavelength of the second communication frequency band; the electrical length of the third radiator is 1 / 4 wavelength of the second communication frequency band.

19. A wireless earphone, characterized in that, include: Ear bag; An ear handle is arranged along a first direction, and one end of the ear handle facing the ear bag is connected to the ear bag; The antenna structure is arranged in the ear handle, and the antenna structure includes: The first radiator; A feeding end is arranged on the first radiator, and the feeding end divides the first radiator into a first branch and a second branch; a portion of the first branch along the first direction and a portion of the second branch along the first direction are arranged opposite to each other; the first branch has an open end on a side away from the ear bag; the portion of the first branch from the feeding end to the open end includes a first part, a second part and a third part in sequence; the first part has a first line width S1, the second part has a second line width S2, and the third part has a third line width S3; S1<S2, S3<S1; Among them, the first branch is used to generate a first resonance in a first communication frequency band, and the first branch is also used to generate a second resonance in a second communication frequency band; the second branch is used to generate a second resonance in a second communication frequency band; any frequency in the second communication frequency band is greater than any frequency in the first communication frequency band.

20. The wireless headset according to claim 19, characterized in that: The electrical lengths of the first part, the second part, and the third part are all 1 / 4 wavelength of the second communication frequency band; the electrical length of the first stub is 1 / 4 wavelength of the first communication frequency band; the electrical length of the second stub is 1 / 4 wavelength of the second communication frequency band.

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