Antenna, antenna assembly and earphone

Abstract

The embodiment of the invention provides an antenna, an antenna assembly and an earphone. The antenna comprises an antenna body, a feed part and at least two grounding parts, the feed part is connected to the antenna body; the at least two grounding parts are connected to the antenna body at intervals and are arranged at intervals with the feed part. In this way, the problem that an existing antenna is prone to being interfered can be solved.

Description

Technical Field

[0001] The present application relates to the field of antennas, and particularly to antennas, antenna assemblies, and earphones. Background Art

[0002] An antenna is an important component in an electronic device with communication functions. For example, for Bluetooth functionality, an antenna is also required to achieve the transmission of Bluetooth signals and data. Currently, most electronic devices are equipped with antennas, such as mobile phones, computers, earphones, tablets, smart wearable devices, etc. Antennas often require a large clearance area to reduce interference from other circuit components.

[0003] Currently, the trend in the design of electronic devices is towards compact design, resulting in a smaller clearance area for the antenna and greater interference from surrounding interfering circuits to the antenna, leading to low antenna radiation efficiency. Summary of the Invention

[0004] The main technical problem to be solved by the present application is to provide an antenna, an antenna assembly, and an earphone that can improve the problem that the existing antenna is easily interfered by surrounding circuits, resulting in low antenna radiation efficiency.

[0005] To solve the above technical problem, an embodiment of the present application provides an antenna, which includes: an antenna body, a feeding part, and two grounding parts; the feeding part is connected to the antenna body; the two grounding parts are spaced and connected to the antenna body, and are both spaced from the feeding part.

[0006] Compared with the prior art, the beneficial effect of the present application is that: by including at least two grounding parts spaced and connected to the antenna body, the at least two grounding parts enable the antenna to be grounded at multiple points, and the positions of multiple electric field zeros can reduce the electrical coupling generated by adjacent other circuit components, thereby reducing the interference to the antenna, and further effectively reducing or shielding the interference of other circuit components, and further improving the performance of the antenna.

[0007] In some embodiments, a working path is formed between two adjacent grounding parts of the antenna body, and the working path includes a first working path, and the length of the first working path matches the first working wavelength of the antenna.

[0008] In some embodiments, the antenna body is linearly arranged, and the length of the working path is set to the path length along the antenna body between the two grounding parts.

[0009] In some embodiments, the antenna body is planar, and the grounding parts are spaced on the outer periphery of the antenna body; the length of the working path is set to the path length along the outer periphery of the antenna body between the corresponding two grounding parts.

[0010] In some embodiments, the feeding portion and the grounding portion extend from the antenna body and are arranged in a sheet shape; a notch is provided at the outer peripheral edge of the antenna body, and the feeding portion is connected to the notch edge of the notch; one of at least two grounding portions is connected to an adjacent edge of the outer peripheral edge that is connected to the notch edge, and the main surfaces of the feeding portion and the grounding portion connected to the adjacent edge face the same side of the antenna body outward or are parallel to each other.

[0011] In some embodiments, the antenna body is arranged as a one-piece structure, and the length of the first working path is set to an odd multiple of half of the first working wavelength of the antenna.

[0012] In some embodiments, the antenna body is arranged in a planar shape, the number of grounding portions is two, and the two grounding portions are connected to the outer peripheral edge of the antenna body; the working path includes a second working path, one side edge of the outer peripheral edge of the antenna body located between the two grounding portions is used to form the first working path, and the other side edge located between the two grounding portions is used to form the second working path.

[0013] In some embodiments, the absolute value of the difference between the length of the first working path and the length of the second working path is within 0 mm to 5 mm.

[0014] In some embodiments, the length of the second working path is set to match a second working wavelength different from the first working wavelength of the antenna body.

[0015] In some embodiments, the first working wavelength includes the wavelength corresponding to 2.4 GHz, and the second working wavelength includes the wavelength corresponding to 5 GHz.

[0016] In some embodiments, the antenna body has an electric field strength point position, and the antenna body includes a first main body portion and a second main body portion divided by the electric field strength point position; the feeding portion and at least one grounding portion are connected to the first main body portion, and the other of at least one other grounding portion is connected to the second main body portion.

[0017] In some embodiments, the first main body portion and the second main body portion are arranged at intervals; the first main body portion has a first slit edge, the second main body portion has a second slit edge, the first slit edge and the second slit edge are opposite to each other and arranged at intervals to form a slit, and the slit separates the first main body portion from the second main body portion. The first main body portion and the grounding portion and the feeding portion connected thereto form a main antenna, and the second main body portion and the grounding portion connected thereto form a parasitic antenna.

[0018] In some embodiments, a corresponding first sub - working path is provided between the grounding part to which the first main body is connected and the first slit edge, and the length of the first sub - working path is set to an odd multiple of one - quarter of the first working wavelength of the antenna; and / or, a corresponding second sub - working path is provided between the grounding part to which the second main body is connected and the second slit edge, and the length of the second sub - working path is set to an odd multiple of one - quarter of the first working wavelength of the antenna.

[0019] In some embodiments, the width of the slit is 0.1 mm to 5 mm.

[0020] In some embodiments, the first main body and the second main body are integrally formed.

[0021] On the other hand, an antenna assembly provided by an embodiment of the present application includes: a circuit board and an antenna, a feeding part and at least two grounding parts are connected to the circuit board, and the antenna body is arranged at an interval from the circuit board.

[0022] In some embodiments, the antenna assembly further includes at least two connecting wires, and the connecting wires are connected to wire connection points on the circuit board; each grounding part corresponds to a wire connection point, and each grounding part is closer to its corresponding wire connection point than other grounding parts.

[0023] In some embodiments, the antenna assembly includes a transmission interface for coupling to an external device; the transmission interface is electrically connected to the circuit board and arranged at an interval, and is grounded through the circuit board to form a parasitic antenna.

[0024] In some embodiments, the minimum distance between the transmission interface and the antenna body is 0.5 mm to 5 mm.

[0025] In some embodiments, at least one of an inductor, a capacitor, and a resistor is further provided between the transmission interface and the circuit board.

[0026] On the other hand, the present application further includes a headphone, which includes a headphone body and an antenna assembly arranged on the headphone body. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic front view of an exemplary structure of an embodiment of the antenna assembly of the present application;

[0028] Figure 2 is a schematic top - down view of an exemplary structure of an embodiment of the antenna assembly of the present application;

[0029] Figure 3 is Figure 2 an exemplary structural schematic diagram of the first working path and the second working path in

[0030] Figure 4It is a top-down schematic diagram of another exemplary structure of the antenna assembly embodiment of the present application;

[0031] Figure 5 is Figure 4 An exemplary structural schematic diagram of the first sub-working path and the second sub-working path in

[0032] Figure 6 It is a top-down schematic diagram of yet another exemplary structure of the antenna assembly embodiment of the present application;

[0033] Figure 7 It is a structural schematic diagram of the headphone embodiment of the present application;

[0034] Figure 8 It is a comparison schematic diagram of the radiation efficiency between the antenna assembly embodiment of the present application and a conventional IFA antenna. Detailed implementation manners

[0035] Next, embodiments of the technical solutions of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, so they are only examples and cannot be used to limit the protection scope of the present application.

[0036] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality" is more than two, unless otherwise clearly and specifically defined.

[0037] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", "setting" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be directly connected or indirectly connected. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific situations.

[0038] The inventors of the present application have found through research that for electronic devices such as mobile phones, computers, headphones, tablet computers, smart wearable devices, etc., a compact design is often required, which leads to a relatively limited internal space. In such a case, the clearance area of the antenna is often small, resulting in large interference from circuit components and the like around it to the antenna, low radiation efficiency, and poor performance.

[0039] To solve the above problems, the present application provides the following embodiments. The following antenna embodiments of the present application describe the exemplary structures of the antennas.

[0040] See Figure 1, the antenna 100 may include an antenna body 110, a feeding portion 120, and at least two grounding portions 130. The feeding portion 120 is connected to the antenna body 110. The at least two grounding portions 130 are spaced and connected to the antenna body 110, and are both spaced from the feeding portion 120. The grounding portion 130 can be used to connect to the ground point of the circuit board 200, specifically, the antenna body 110 can be connected to the ground of the circuit board 200 through the grounding portion 130. The feeding portion 120 can be used to connect to the feeding point of the circuit board 200, and the signals on the circuit board 200 can be transmitted to the antenna body 110 through the feeding point and the feeding portion 120 on the circuit board 200.

[0041] Generally speaking, mobile terminals (such as mobile phones, earphones, etc.) have a relatively small clearance area for antennas due to their compact structure and small size, which also makes the design size of the antenna in the corresponding operating frequency band relatively limited. Moreover, due to the compact structure, there are often many electronic devices gathered near the antenna. These electronic devices close to the antenna will interfere with the radiation of the antenna, resulting in poor radiation efficiency and performance. The radiation efficiency of the antenna 100 refers to the ratio of the radiation power of the antenna 100 to the input power. The operating frequency band of the antenna 100 refers to the frequency band that meets the preset conditions when the antenna 100 is operating.

[0042] On the one hand, the at least two grounding portions 130 enable the antenna 100 to be grounded at at least two points, forming at least two electric field null points, which can effectively reduce the electrical coupling generated by other adjacent electronic devices / circuits to the antenna 100, and thus can effectively reduce or shield the interference of other adjacent electronic devices to the antenna 100, further improving the radiation efficiency of the antenna 100.

[0043] On the other hand, since the at least two grounding portions 130 are spaced on the antenna body 110 and connected to different positions on the antenna body 110, the antenna 100 has multiple current strong points. Furthermore, the grounding portions 130 at different connection positions combined with the antenna body 110 can enable the antenna 100 to present multiple antenna modes under certain circumstances. The multiple antenna modes can be the same or different. When the multiple antenna modes are the same, the operating frequencies of the multiple antenna modes are the same, thereby improving the radiation efficiency of the antenna 100 at this operating frequency; when the multiple antenna modes are different, the operating frequencies of the multiple antenna modes are different, which can expand the bandwidth of the antenna operation. For example, it can expand a certain frequency band or excite the radiation of multiple different frequency bands, so that the antenna 100 can meet the requirements of more radiation scenarios.

[0044] The above-described antenna 100 may include at least two ground portions 130, that is, the number of ground portions 130 may be three, four or more. Optionally, the feeding portion 120 may be closer to at least one of the at least two ground portions 130. On the one hand, different antenna modes are more easily generated. On the other hand, when the required operating frequency band is satisfied, the size of the antenna can be as small as possible.

[0045] In some embodiments, the antenna body 110 may be provided with a working path between every two adjacent ground portions 130. The working path is a physical path in the structure of the antenna body 100 (for example, the dimensions of certain structures, such as length, etc.), specifically, a straight path or a non-straight path between the grounding points on the antenna body 100 connected to the two ground portions 130. This physical path refers to meeting the radiation requirements of the antenna 100 at the operating frequency. That is, when designing the antenna 100, it is necessary to consider meeting the radiation requirements at the operating frequency to design this physical path.

[0046] In some embodiments, the antenna body 110 is linearly arranged. The length of the working path may be set to the path length along the antenna body 110 between two adjacent ground portions 130. The antenna body 110 being linearly arranged means that the antenna body 110 is generally like the body structure of an IFA antenna, for example, it may be an elongated strip or rod-shaped structure, and of course, it may also be an elongated sheet.

[0047] In some embodiments, refer to Figure 2 and Figure 3 , the antenna body 110 is arranged in a planar shape. The antenna body 110 being arranged in a planar shape means that the antenna body 110 is generally like the body structure of a PIFA antenna, for example, it may be a plate-like structure. For the planar antenna body 110, the main surface of the antenna body 110 (for example, the side surface with the largest area) may be generally planar, or have a non-planar shape with protrusions or depressions. At least two ground portions 130 are spaced and connected to the outer peripheral edge of the antenna body 110. When the antenna body is arranged in a planar shape, the number of working paths may be multiple.

[0048] Refer to Figure 3 , in some embodiments, the working path may be the path L10 along the outer peripheral edge of the antenna body 110 between two adjacent ground portions 130. In other embodiments, the working path may be the path L11 along the interval direction of the two ground portions 130 between two adjacent ground portions 130, or the path L12 from one ground portion 130 to another ground portion 130 after passing through a transition point, and the transition point may be any point or any several points on the antenna body. The length of the working path may be set to the path length along the outer peripheral edge of the antenna body 110 between two adjacent ground portions 130.

[0049] In a specific embodiment, the working path is the path L10 along the outer peripheral edge of the antenna body 110 between two adjacent grounding portions 130. In this case, the overall size of the antenna body 110 can be made smaller.

[0050] Through the above settings, the form of at least two grounding portions 130 can present multiple antenna modes in certain cases for both linear antennas 110 and planar antennas 110, and thus can expand the corresponding working frequency band range or excite the radiation of different multiple working frequency bands. In some other examples, there can be a working path between every two adjacent grounding portions 130, so that at least two grounding portions 130 can enable the antenna 100 to possibly have multiple working paths. In this case, the length of one working path meets the radiation requirements of the antenna at a certain working frequency band. If there are other working paths, they can further play a role in broadening the working frequency band of the antenna or exciting other different working frequency bands to achieve multi-band radiation.

[0051] The working path can include a first working path, and the length of the first working path matches the first working wavelength of the antenna 100. That is, under the first working path with a length matching the first working wavelength, the antenna body 110 can radiate an electromagnetic wave signal with the first working wavelength through the first working path. In other words, the antenna 100 has a first working frequency or a first working frequency range, and the first working frequency or the first working frequency range corresponds to the first working wavelength. The length of the first working path is set to match the first working wavelength of the antenna 100, so that the antenna 100 can radiate electromagnetic waves outward at the first working wavelength, thereby meeting the corresponding radiation requirements. For example, the first working wavelength is the wavelength corresponding to 2.4 GHz or 5 GHz.

[0052] Through the above settings, the form of at least two grounding portions 130 can be provided with a first working path for both linear antennas 110 and planar antennas 110, thereby meeting the radiation requirements of the working frequency band corresponding to the first working wavelength. On this basis, in certain cases, the antenna 100 can also form other working paths. The first working path and the other working paths resonate to generate multiple antenna modes, expand the frequency band at the working frequency band corresponding to the first working wavelength, or can meet the radiation requirements of multiple different working frequency bands.

[0053] For example, the working path may further include a second working path. In some embodiments, the second working path may extend the working frequency band corresponding to the first working wavelength or enhance the radiation efficiency of the working frequency of the first working wavelength. For example, the absolute value of the difference between the length of the first working path and the length of the second working path is within 0 mm to 5 mm. With such a setting, the length of the second working path is made as close as possible to the length of the first working path, which can effectively extend the range of the working frequency band corresponding to the first working wavelength or further enhance the radiation of the working frequency band corresponding to the first working wavelength, and effectively improve the radiation efficiency.

[0054] Optionally, the absolute value of the above difference is within 0 mm to 3 mm, which can further make the first working path as close as possible to the first working path and further extend the range of the working frequency band corresponding to the first working wavelength. Optionally, the absolute value of the above difference may be 0 mm to 2 mm, or 0 mm to 1 mm.

[0055] In some other embodiments, the second working path may meet the radiation requirements of the frequency band corresponding to the second working wavelength different from the first working wavelength. That is, the antenna 100 can radiate two different wavelengths, and the first working path and the second working path can achieve the radiation requirements of the frequency bands corresponding to different working wavelengths. Specifically, the length of the second working path is set to match the second working wavelength different from the first working wavelength of the antenna body 110. In this way, the length of the second working path can meet the radiation requirements of the working frequency band corresponding to the second working wavelength, so that the antenna 100 can achieve the radiation requirements of different first working wavelengths and second working wavelengths, meet the radiation requirements of multiple wireless frequency band connections, and thus can achieve the multi-mode connection of the antenna 100.

[0056] Whether it is a linear antenna body 110, a planar antenna body 100 or other types of shaped antenna bodies 110, they can be integrally structured or separately structured.

[0057] See Figure 2 and Figure 4, for example, the antenna body 110 may have a position with a strong electric field point. The antenna body 100 may include a first main body portion 111 and a second main body portion 112 divided by the position of the strong electric field point. The feeding portion 120 and at least one grounding portion 130 are connected to the first main body portion 111, and at least another grounding portion 130 is connected to the second main body portion. Taking two grounding portions 130 as an example, the position of the strong electric field point is located between the two grounding portions 130. The feeding portion 120 and one of the grounding portions 130 are connected to the first main body portion 111, and the other grounding portion 130 is connected to the second main body portion 112. For an integrated structure setting, the first main body portion 111 and the second main body portion 112, etc. may be of an integrated structure setting, for example, integrally formed. For a split structure setting, the first main body portion 111 and the second main body portion 112 may be spaced apart from each other.

[0058] Among them, for an antenna with an integrated structure, the position of the strong electric field point can be roughly referred to Figure 2 the position shown by the dotted line in. The current direction may include the direction shown by the arrow in the figure, which is from the position of the strong electric field point along the outer periphery of the planar antenna to the grounding portion, or may also include the direction from any point of the position of the strong electric field point directly to the grounding portion.

[0059] The integrated structure and the split structure settings are described separately below.

[0060] (1) The antenna body 110 may be of an integrated structure setting (see Figure 2 and Figure 3 ).

[0061] It has been described above that at least two grounding portions 130 can reduce the electrical coupling of adjacent other circuit devices / circuits and reduce the interference of other circuit devices on the antenna 100. In the working mode of the antenna 100, at least two grounding portions 130 are connected to the antenna body 110 at intervals, so that the antenna 100 can excite a slot antenna or a mode similar to a slot antenna. For example, the antenna 100 is coupled to the circuit board 200. The feeding portion 120 is electrically connected to the circuit board 200, and an excitation signal is input from the circuit board 200 to the feeding portion. The grounding portion 130 is also electrically connected to the circuit board 200 and grounded through the circuit board 200. There is a gap between the antenna body 110 and the circuit board 200, so that the antenna 100 can further excite or a mode similar to a slot antenna.

[0062] The size of the slot antenna is affected by the positions or distances of at least two ground portions 130. Therefore, the operating frequency band of the slot antenna can be controlled by controlling the relative positions or relative distances of at least two ground portions 130. Optionally, the length of the first working path between two adjacent ground portions 130 matches the operating wavelength of the antenna body 110. By setting the relative positions of two adjacent ground portions 130 among them, the corresponding first working path can be adjusted, so as to meet the operating frequency band or frequency range corresponding to the first working wavelength. For example, the length of the first working path is set to be half of the first working wavelength of the antenna 100.

[0063] In some embodiments, for the linear antenna 100, the length of the first working path is set to be the path length along the antenna body 110 between two adjacent ground portions 130. In other words, the path length is the extended length of the antenna body 110 between the connection points of the corresponding two ground portions 130 and the antenna body 110. Taking the antenna 100 including two ground portions 130 as an example, the length of the first working path is set to be the path length of the corresponding two ground portions 130 along the antenna body.

[0064] Specifically, the length of the first working path is set to be half of the first working wavelength of the antenna 100. On the basis of exciting the slot antenna mode, by setting the length of the first working path to be half of the first working wavelength, a 1 / 2 wavelength slot antenna mode can be provided, which can meet the radiation requirements of wireless communication methods such as Bluetooth. During the design stage, the operating frequency band of the slot antenna is controlled by adjusting the distance between at least two adjacent ground portions 130 among them, so that the degree of freedom in the design of the antenna 100 can be effectively improved.

[0065] As described above, the number of the ground portions 130 can be at least two. Taking the number of the ground portions 130 being three as an example, the three ground portions 130 are arranged at intervals along the antenna body 110. The working path between two adjacent ground portions 130 can be the first working path, and the length of the first working path can be half of the first working wavelength of the antenna 100. The working path between another two adjacent ground portions 130 can be the second working path, and the length of the second working path can be equal to half of the first working wavelength of the antenna 100, or can be not equal to half of the first working wavelength of the antenna 100. If the length of the second working path between another two adjacent ground portions 130 is equal to half of the working wavelength of the antenna 100, the antenna efficiency at the first working wavelength can be further enhanced; if the length of the second working path between another two adjacent ground portions 130 is not equal to half of the first working wavelength of the antenna 100, it can play a role in broadening the operating frequency band.

[0066] From the perspective of the slot antenna, three or more grounding parts 130 can excite at least two slot antenna modes based on the same linearly arranged antenna body 110. If the at least two slot antenna modes can excite radiation in the same operating frequency band, and if the operating frequency bands excited by the at least two slot antenna modes are not completely the same or are completely different, then the operating frequency band of the antenna 100 can be effectively extended or radiation in different operating frequency bands can be achieved. Moreover, the at least two grounding parts 130 can make the antenna 100 grounded at multiple points (current zero points), which can weaken the electrical coupling between the surrounding circuits and the antenna 100, thereby reducing the interference of adjacent other circuit elements to the antenna, and then effectively reducing or shielding the interference and improving the performance of the antenna.

[0067] In some other embodiments, for the planar antenna body 110, at least two grounding parts 130 can be connected to the outer periphery of the antenna body 110. Specifically, the part of the outer periphery of the antenna body 110 between every two adjacent grounding parts 130 and the circuit board 200 (i.e., similar to the ground plane) can form or be similar to a slot antenna. In this way, the antenna 100 can form at least two slot antenna modes. Moreover, since the antenna body 100 is arranged in a planar shape, a planar antenna mode can also be excited simultaneously, thereby making the antenna 100 present as a composite antenna, which can effectively extend the operating frequency band of the antenna 100 and improve the radiation efficiency of the antenna 100.

[0068] For the slot antenna, there may be multiple working paths between the at least two grounding parts 130. Specifically, there can be a working path between every two adjacent grounding parts 130. Optionally, the length of the working path is set to the path length along the outer periphery of the antenna body 110 between the corresponding two grounding parts 130. In other words, the path length of the first working path is the length of the part of the outer periphery of the antenna body 110 between the connection points of the corresponding two grounding parts 130.

[0069] Specifically, the part of the outer periphery of the antenna body 110 between two adjacent grounding parts 130 and the circuit board 200 (i.e., similar to the ground plane) can excite a mode similar to the slot antenna mode, and the frequency band of this slot antenna mode matches the operating wavelength of the antenna 100. For the planar antenna body 110, multiple slot antenna modes can be excited, and different slot antennas can meet the radiation requirements of the same or different operating wavelengths according to the path length, so as to expand the range of the operating frequency band or achieve the radiation requirements of multiple different operating frequency bands, or improve the radiation efficiency.

[0070] See Figure 3, taking the example that the antenna 100 includes two grounding parts 130, the length of the working path is set to the path lengths of the corresponding two grounding parts 130 along the outer peripheral edge of the antenna body 110.

[0071] Along the outer peripheral edge of the planar antenna body 110, there can be two working paths between the two grounding parts 130, and two slot antenna modes can be excited. One side edge of the outer peripheral edge of the antenna body 110 located between the two grounding parts 130 is used to form the first working path L10, and the other side edge located between the two grounding parts 130 is used to form the second working path L15.

[0072] That is to say, the two grounding parts 130 are connected to the outer peripheral edge of the antenna body 110. One side edge of the outer peripheral edge of the antenna body 110 located between the two grounding parts 130 is used to form the first working path, and the other side edge located between the two grounding parts 130 is used to form the second working path.

[0073] Taking the example that the antenna 100 includes three or more grounding parts 130, the length of the working path is set to the path lengths of every two adjacent grounding parts 130 along the outer peripheral edge of the antenna body 110. The antenna 100 can excite at least three antenna modes through at least three grounding parts 130.

[0074] Part of the outer peripheral edge of the antenna body 110 located between two adjacent grounding parts 130 is used to form the first working path, part of the outer peripheral edge located between another two adjacent grounding parts 130 is used to form the second working path, and of course part of the outer peripheral edge located between yet another two adjacent grounding parts 130 can also form a working path. If the number of grounding parts 130 is three, in this case, along the outer peripheral edge of the antenna 100, every two adjacent grounding parts 130 can form a slot antenna with the circuit board 200. Therefore, at least three slot antennas can be formed between the three grounding parts 130, and the length of the working path (the first working path) of one of the slot antennas only needs to match the working wavelength of the antenna 100.

[0075] Therefore, the length of the first working path matching the first working wavelength of the antenna 100 can meet the radiation requirements of the working frequency band corresponding to the first working wavelength. The path length of the second working path can match the first working wavelength of the antenna 100, thereby further enhancing the radiation efficiency of the first working wavelength, or it can not match the first working wavelength of the antenna 100, thereby expanding the working frequency band corresponding to the first working wavelength or exciting radiation of different working frequency bands.

[0076] Of course, the grounding part 130 can not be connected to the outer peripheral edge of the antenna body 110, and can also be connected inside the main surface of the antenna body 110.

[0077] In some embodiments, the second working path can expand the working frequency band corresponding to the first working wavelength or enhance the radiation efficiency of the working frequency of the first working wavelength. For example, the absolute value of the difference between the length of the first working path and the length of the second working path is within 0 mm to 5 mm. With such a setting, the length of the second working path is made as close as possible to the length of the first working path, which can effectively expand the range of the working frequency band corresponding to the first working wavelength or further enhance the radiation of the working frequency band corresponding to the first working wavelength, and effectively improve the radiation efficiency.

[0078] Optionally, the absolute value of the above difference is within 0 mm to 3 mm, which can further make the second working path as close as possible to the first working path and further expand the range of the working frequency band corresponding to the first working wavelength. Optionally, the absolute value of the above difference can be 0 mm to 2 mm, or 0 mm to 1 mm.

[0079] Briefly speaking, during design, the relative positions of the two grounding parts 130 can be appropriately adjusted (or a new grounding part 130 can be added) to adjust the resonant frequencies of the two slot antennas to the vicinity of the working frequency band corresponding to the first working wavelength (such as 2.4 GHz), so that, compared with a conventional single-mode antenna, the range of the working frequency band of the antenna 100 can be effectively expanded.

[0080] In some other embodiments, the second working path can meet the radiation requirements of the frequency band corresponding to the second working wavelength different from the first working wavelength. That is to say, the antenna 100 can radiate two different wavelengths, and the first working path and the second working path can achieve the radiation requirements of the frequency bands corresponding to different working wavelengths. Specifically, the length of the second working path is set to match the second working wavelength different from the first working wavelength of the antenna body 110. In this way, the length of the second working path can meet the radiation requirements of the working frequency band corresponding to the second working wavelength, and further enable the antenna 100 to achieve the radiation requirements of different first working wavelengths and second working wavelengths, meet the radiation requirements of multiple wireless frequency band connections, and further enable multi-mode connection of the antenna 100.

[0081] For example, the first working wavelength includes the wavelength corresponding to 2.4 GHz, which can meet the radiation requirements of technologies such as Bluetooth, and the second working wavelength includes the wavelength corresponding to 5 GHz, which can meet the radiation requirements of technologies such as WIFI. With such a setting, the antenna 100 can meet the radiation of 2.4 GHz and can also meet the radiation of 5 GHz, realizing dual-mode or even multi-mode radiation.

[0082] From the perspective of a slot antenna, at least two grounding portions 130 can excite at least two slot antenna modes based on the same planar antenna body 110. If the at least two slot antenna modes can excite radiation in the same operating frequency band, the radiation efficiency of the antenna 100 at this operating frequency can be improved; if the operating frequency bands excited by the at least two slot antenna modes are not completely the same or are completely different, the operating frequency band of the antenna 100 can be effectively extended or radiation in different operating frequency bands can be achieved. Moreover, at least two grounding portions 130 can make the antenna 100 grounded at multiple points (current zeros), which can weaken the electrical coupling between the surrounding circuits and the antenna 100, thereby reducing the interference of adjacent other circuit elements to the antenna, and thus can effectively reduce or shield the interference and improve the performance of the antenna.

[0083] In addition, as Figure 2 shown, the first main body portion 111 and the second main body portion 112 are integrally formed or connected into an integral structure (such as welding, etc.). The first main body portion 111 and the second main body portion 112 can be two parts of the antenna body 110 respectively, and the two are only divided into electrical regions at the positions of the strong electric field points, without actual physical separation.

[0084] (2) The antenna body 110 can be arranged in a split structure (see Figure 4 and Figure 5 ).

[0085] The first main body portion 111 and the second main body portion 112 can be arranged at intervals from each other. In this case, the antenna body 110 is divided into two independent parts. The first main body portion 111 and the second main body portion 112 are arranged at intervals, and the two can be coupled by displacement current.

[0086] Taking the antenna 100 including two grounding portions 130 as an example, the position of the strong electric field point of the antenna body 110 is located between the two grounding portions 130. The feeding portion 120 and one of the grounding portions 130 are connected to the first main body portion 111, so that the first main body portion 111, the feeding portion 120 and the corresponding grounding portion 130 form a main antenna. The other grounding portion 130 is connected to the second main body portion 112, so that the second main body portion 112 and the corresponding grounding portion 130 form a parasitic antenna.

[0087] For the antenna body 110 arranged in a linear shape, the main antenna can be regarded as an IFA antenna. As mentioned in the previous content, the antenna body 110 arranged in a linear shape can refer to the structure of the body of the IFA antenna.

[0088] For the antenna body 110 arranged in a planar shape, the main antenna 100 can be regarded as a PIFA antenna. Similarly, as mentioned in the previous content, the antenna body 110 arranged in a planar shape can refer to the structure of the body of the PIFA antenna.

[0089] Among them, an IFA antenna or a PIFA antenna usually has a grounding portion 130 and a feeding portion 120, and its operating frequency band is generally affected by factors such as the positional relationship between the grounding portion 130 and the feeding portion 120, and the positional relationship between the grounding portion 130 and the strong electric field point.

[0090] In other words, Figure 4 The antenna 100 of the illustrated embodiment includes a first antenna and a second antenna which are arranged at intervals. The first antenna is the main antenna and includes a first main body portion 111, a feeding portion 120 and a grounding portion 130 connected to the first main body portion 111. The second antenna is a parasitic antenna and includes a second main body portion 112 and a grounding portion 130 connected to the second main body portion 112. The first main body portion 111 has a first slit edge 113. The second main body portion 112 has a second slit edge 114. The first slit edge 113 and the second slit edge 114 are opposite to each other and arranged at intervals to form a slit 115. The edge regions where the first slit edge 113 and the second slit edge 114 are located can be the positions of the strong electric field points of the antenna 100. The slit 115 spaces the first main body portion 111 from the second main body portion 112. The first main body portion 111 and the grounding portion and the feeding portion connected thereto form the main antenna, and the second main body portion 112 and the grounding portion connected thereto form the parasitic antenna. The main body portion 112 can be regarded as a parasitic element parasitically generated from the first main body portion 111 through current coupling.

[0091] See Figure 5 , for the first main body portion 111, the grounding portion 130 and the feeding portion 120 can be connected to the edge position of the first main body portion 111 at intervals, and of course, they can also be connected inside the first main body portion 111. For example, the grounding portion 130 and the feeding portion 120 can be arranged opposite to the first slit edge 113. A corresponding first sub-working path is provided between the grounding portion 130 and the first slit edge 113. The first sub-working path can be the path L20 from the grounding portion 130 to the first slit edge 113 along the outer periphery of the first main body portion 111, or can be the path between any point of the grounding portion 130 and the first slit edge 113 (such as L21 and L22).

[0092] Optionally, the length of the first sub-working path is set to an odd multiple (such as 1 time, 3 times...) of a quarter of the first working wavelength of the antenna 100, such as a quarter, three quarters, five quarters... Among them, the length of the first sub-working path can refer to the path length from the grounding portion 130 to the first slit edge 113 along the outer periphery of the first main body portion 111. Of course, the length of the first sub-working path can also be the distance between the connection point of the corresponding grounding portion 130 and the first main body portion 111 and any point of the first slit edge 113.

[0093] In other words, taking the IFA antenna or the PIFA antenna as the main antenna, during design, the structure or size of the main antenna can be set according to the requirements of the operating frequency band corresponding to the first operating wavelength of the antenna 100. For example, setting the length of the first sub-working path to an odd multiple of one-fourth of the first operating wavelength can meet the radiation requirements of technologies such as 2.4 GHz Bluetooth.

[0094] In addition, the width of the slot 115 can be 0.1 mm to 5 mm. Setting such a slot distance can effectively cause a parasitic antenna to be parasitically generated by the main antenna, enhance the coupling current of the main antenna to the parasitic antenna, and thus improve the radiation efficiency of the parasitic antenna, and can further expand the operating frequency band of the antenna 100. Optionally, the slot distance can be 0.2 mm to 0.3 mm, or 0.5 mm to 3 mm, or 1 mm to 2 mm. In this way, contact between the two can be avoided to ensure the formation of the parasitic antenna, and on the other hand, the coupling current of the main antenna to the parasitic antenna can be made relatively large, improving the radiation efficiency of the parasitic antenna.

[0095] See Figure 5 , for the second main body portion 112, there is a corresponding second sub-working path between the corresponding grounding portion 130 and the second slot edge 114 of the second main body portion 112. The second sub-working path can be the path L30 from the grounding portion 130 to the second slot edge 114 along the outer peripheral edge of the second main body portion 112, or can be the path (such as L31 or L32) from any point of the grounding portion 130 to the second slot edge 114.

[0096] The length of the second sub-working path is set to an odd multiple (such as 1 time, 3 times...) of one-fourth of the first operating wavelength of the antenna body 110, such as one-fourth, three-fourths, five-fourths. Among them, the length of the second sub-working path can refer to the path length from the grounding portion 130 to the second slot edge 114 along the outer peripheral edge of the second main body portion 112. Of course, the length of the second working path can also refer to the distance from the connection point of the grounding portion 130 and the second main body portion 112 to any point of the second slot edge 114.

[0097] By setting the length of the second sub-working path to an odd multiple (such as 1 time, 3 times...) of one-fourth of the first operating wavelength of the antenna 100, the parasitic antenna can also radiate electromagnetic waves of the first operating wavelength, and thus enhance the radiation of the first operating wavelength together with the main antenna, improving the radiation efficiency of the antenna 100. Of course, the length of the second sub-working path can also be slightly greater than or less than an odd multiple (such as 1 time, 3 times...) of one-fourth of the first operating wavelength, so as to be able to resonate near the operating frequency band corresponding to the first operating wavelength, and thus enhance the frequency band range of the first operating wavelength.

[0098] As described above, the antenna body 110 can be provided in an integrated structure and a split structure. For the antenna body 110 having a planar structure, a notch is provided at the outer peripheral edge of the antenna body 110 (see Figure 2 , Figure 3 , Figure 4 and Figure 5 ). The feeding portion 120 and the grounding portion 130 extend from the antenna body 110 and are provided in a sheet shape. The feeding portion 120 is connected to the notch edge of the outer peripheral edge of the antenna body 110 where the notch is formed; one of the grounding portions 130 is connected to the adjacent edge of the outer peripheral edge of the antenna body 110 that is adjacent to the notch edge connected above.

[0099] Optionally, the main surface of the feeding portion 120 and the main surface of the grounding portion 130 connected to the adjacent edge face the same side of the antenna body outward or are parallel to each other.

[0100] The main surface of the feeding portion 120 refers to the surface with the largest area of the feeding portion 120, and the main surface of the grounding portion 130 refers to the surface with the largest area of the grounding portion 130. On this basis, the main surfaces of the feeding portion 120 and the grounding portion 130 can further refer to the surfaces of the feeding portion 120 and the grounding portion 130 facing the outside of the antenna body 110.

[0101] By setting the main surface of the feeding portion 120 and the main surface of the corresponding grounding portion 130 to face the same side of the antenna body outward or be parallel to each other, the two can be formed by bending in the same direction, for example, by stamping in the same direction, so that the manufacturing efficiency can be improved. And due to the existence of the notch, part of the feeding portion 120 can be formed by stamping the part originally existing in the notch, thereby saving the material used for the entire antenna 100.

[0102] Based on the above antenna embodiments, the present application also provides antenna assembly embodiments. The following antenna assembly embodiments describe the exemplary structure of the antenna assembly 10.

[0103] The antenna assembly 10 may include: a circuit board 200 and the above antenna 100. The feeding portion 120 and at least two grounding portions 130 of the antenna 100 are connected to the circuit board 200. The antenna 100 body is spaced apart from the circuit board 200.

[0104] Under normal circumstances, when the antenna 100 is assembled on the circuit board 200 for use, the antenna 100 is easily interfered by the electrical coupling between each electronic component on the circuit board 200 and the antenna 100. In some embodiments, the circuit board 200 is provided with at least two connecting wires 201. The connecting wires 201 are connected to the wire connection points on the circuit board 200. Each grounding portion corresponds to a wire connection point. Among the at least two connecting wires 201, each grounding portion 130 is closer to its corresponding wire connection point than other grounding portions. Thus, by providing at least two grounding portions 130, at least two electric field zero points are formed. Due to the existence of the at least two electric field zero points, the interference of the electrical coupling generated around the antenna 100 can be further reduced, and the performance of the antenna 100 can be improved.

[0105] As described above, a parasitic antenna is an antenna 100 that is grounded and includes at least one parasitic element (i.e., an element without a feeding portion 120 or a feeding point). As Figure 6 shown, in some embodiments, the antenna assembly 10 may further include a transmission interface 202 for coupling an external device. The transmission interface 202 is electrically connected to the circuit board 200 and is spaced apart, and is grounded through the circuit board 200, so that the transmission interface 202 can also serve as a parasitic antenna. Thus, the transmission interface 202 serving as a parasitic antenna can further improve the antenna efficiency of the antenna assembly 10 and broaden the operating frequency band. Specifically, the transmission interface 202 may be a USB interface or a charging probe interface, and the USB interface may be a TYPE-C interface, a TYPE-A interface, a Type-B interface, or a miniUSB interface.

[0106] In some embodiments, the minimum distance between the transmission interface 202 and the antenna body 110 is 0.5 mm to 5 mm.

[0107] In some embodiments, at least one of an inductor, a capacitor, and a resistor is further provided between the transmission interface 202 and the circuit board 200. In this case, the operating frequency band of the parasitic antenna can be controlled by adjusting the parameters of the inductor, the capacitor, and the resistor.

[0108] Optionally, the antenna assembly 10 may further include a bracket (not shown in the figure). The bracket may be disposed between the circuit board 200 and the antenna body 110 for supporting the antenna body 110, thereby ensuring the structural stability and reliability of the antenna body 110. In some embodiments, the bracket may include a plurality of insulating support columns, and the plurality of insulating support columns may support between the circuit board 200 and the antenna body 110. In other embodiments, the bracket may include a support plate and a plurality of support columns. The support plate supports the antenna body 110, and the plurality of support columns support between the support plate and the circuit board 200.

[0109] Based on the descriptions of the above antenna component embodiments and antenna embodiments, the present application also provides a headphone embodiment. The following headphone embodiment of the present application describes the exemplary structure of the headphone 1.

[0110] Referring to Figure 7 , the headphone 1 may include a headphone body 20 and an antenna component 10 disposed on the headphone body 20. Among them, the headphone body 20 may further include a housing component 21, a speaker 22 and / or a battery 23. The speaker 22, the antenna component 10 and the battery 23 may be disposed within the housing component 21. Among them, the housing component 21 may refer to the headphone shell. The battery 23 may supply power to the speaker 22 and the antenna component 10. The antenna component 10 may also communicate with external devices (such as a headphone case, a mobile phone or a computer, etc.).

[0111] For example, the first operating wavelength of the headphone 1 is 2.4 GHz. For the above-mentioned antenna body 110 provided in an integrated structure, the length of the first operating path may be set to an integer multiple (such as 1 time, 2 times...) of half of the first operating wavelength. For the antenna body 110 provided in a split structure, the length of the first sub-operating path of the IFA antenna or the PIFA antenna may be or an odd multiple (which may be 1 time, 3 times...) of a quarter of the first operating wavelength; the second sub-operating path of the parasitic antenna may be configured as needed, for example, it may be configured as an odd multiple (which may be 1 time, 3 times...) of a quarter of the first operating wavelength. In this case, it can enable the operating frequency band of the antenna 100 to be near 2.4 GHz, and the antenna 100 can excite multiple antenna modes, which can further improve the operating efficiency of the antenna 100. Of course, the second sub-operating path may be configured as a quarter of the second operating wavelength, or an odd multiple of a quarter of the second operating wavelength.

[0112] Referring to Figure 8 , when testing with a conventional IFA antenna, its antenna efficiency is relatively low. Assuming that when the antenna efficiency exceeds 10%, the antenna component 10 can communicate stably, then the conventional IFA antenna can communicate stably in the frequency band between 2.38 GHz and 2.48 GHz, but due to the lack of bandwidth margin, the yield in industrial production is relatively low. The antenna 100 involved in the present application can reduce the interference of the electrical coupling between the surrounding circuits and the antenna 100, the communication is more stable, and the bandwidth margin of the operating frequency band is larger, and its ability to resist materials and production tolerances is stronger, and the yield in industrial production is higher.

[0113] In summary, by providing at least two grounding portions 130 on the antenna body 110, based on the fact that the at least two grounding portions 130 are located on the same antenna body 110, the at least two grounding portions 130 can form multiple grounding points, thereby reducing the interference of other adjacent circuit elements on the antenna, and thus effectively reducing or shielding the interference and improving the performance of the antenna. Moreover, different grounding portions 130 may form different antennas based on the same antenna body 110, so that the antenna 100 can present a composite antenna. In the mode of the composite antenna, compared with the conventional single-antenna mode, the working frequency band of the antenna can be effectively expanded or there can be multiple different working frequency bands, thereby improving the antenna efficiency, broadening the function of the frequency band or having multiple different working frequency bands.

[0114] The above description is only the implementation mode of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied to other related technical fields, shall be equally included in the patent protection scope of the present application.

Claims

1. An antenna, characterized in that, Comprising: An antenna body; A feeding portion connected to the antenna body; At least two grounding portions spacedly connected to the antenna body and all spaced from the feeding portion.

2. The antenna according to claim 1, characterized in that, The antenna body forms a working path between two adjacent grounding portions, and the working path includes a first working path, and the length of the first working path matches the first working wavelength of the antenna.

3. The antenna according to claim 2, characterized in that, The antenna body is linearly arranged, and the length of the working path is set as the path length along the antenna body between two corresponding grounding portions.

4. The antenna according to claim 2, characterized in that, The antenna body is planar, and the at least two grounding portions are spacedly arranged on the outer periphery of the antenna body; the length of the working path is set as the path length along the outer periphery of the antenna body between two corresponding grounding portions.

5. The antenna according to claim 4, characterized in that, The feeding portion and the grounding portion extend from the antenna body and are sheet-shaped; a notch is provided on the outer periphery of the antenna body, and the feeding portion is connected to the notch edge of the notch; one of the at least two grounding portions is connected to the adjacent edge of the outer periphery connected to the notch edge, and the main surfaces of the feeding portion and the grounding portion connected to the adjacent edge face the same side of the antenna body outward or are parallel to each other.

6. The antenna according to any one of claims 2 - 5, characterized in that, The antenna body is provided as an integral structure, and the length of the first working path is set as an integer multiple of half of the first working wavelength of the antenna.

7. The antenna according to claim 2, characterized in that, The antenna body is planar, and the number of the grounding portions is two, and the two grounding portions are connected to the outer periphery of the antenna body; the working path includes a second working path, and one side edge of the outer periphery of the antenna body between the two grounding portions is used to form the first working path, and the other side edge between the two grounding portions is used to form the second working path.

8. The antenna according to claim 7, characterized in that, The absolute value of the difference between the length of the first working path and the length of the second working path is within 0 mm to 5 mm.

9. The antenna according to claim 7, characterized in that, The length of the second working path is set to match the second working wavelength different from the first working wavelength of the antenna body.

10. The antenna according to claim 9, characterized in that, The first working wavelength includes the wavelength corresponding to 2.4 GHz, and the second working wavelength includes the wavelength corresponding to 5 GHz.

11. The antenna according to claim 1, characterized in that, The antenna body has an electric field strong point position, and the antenna body includes a first main portion and a second main portion divided by the electric field strong point position; the feeding portion and at least one grounding portion are connected to the first main portion, and at least another grounding portion is connected to the second main portion.

12. The antenna according to claim 11, characterized in that, The first main portion and the second main portion are spacedly arranged; the first main portion has a first slit edge, and the second main portion has a second slit edge, and the first slit edge and the second slit edge are opposite to each other and spacedly arranged to form a slit, and the slit spaces the first main portion and the second main portion, and the first main portion and the grounding portion and the feeding portion connected thereto form a main antenna, and the second main portion and the grounding portion connected thereto form a parasitic antenna.

13. The antenna according to claim 12, characterized in that, A corresponding first sub - working path is provided between the grounding part connected to the first main body part and the first slit edge, and the length of the first sub - working path is set to be an odd multiple of one - quarter of the first operating wavelength of the antenna; and / or, A corresponding second sub - working path is provided between the grounding part connected to the second main body part and the second slit edge, and the length of the second sub - working path is set to be an odd multiple of one - quarter of the first operating wavelength of the antenna.

14. The antenna according to claim 12, characterized in that, The width of the slit is 0.1 mm to 5 mm.

15. The antenna according to claim 11, characterized in that, The first main body part and the second main body part are integrally formed.

16. An antenna assembly, characterized in that, Comprising: A circuit board; An antenna as claimed in any one of claims 1 - 15, wherein the feeding part and the at least two grounding parts are connected to the circuit board, and the antenna main body is spaced apart from the circuit board.

17. The antenna assembly according to claim 16, characterized in that, The antenna assembly further includes at least two connecting wires, and the connecting wires are connected to wire connection points on the circuit board; each grounding part corresponds to a wire connection point, and each grounding part is closer to its corresponding wire connection point than the other grounding parts.

18. The antenna assembly according to claim 16, characterized in that, The antenna assembly includes a transmission interface for coupling to an external device; the transmission interface is electrically connected to and spaced apart from the circuit board, and is grounded through the circuit board to form a parasitic antenna.

19. The antenna assembly according to claim 18, characterized in that, The minimum distance between the transmission interface and the antenna main body is 0.5 mm to 5 mm.

20. The antenna assembly according to claim 18, characterized in that, At least one of an inductor, a capacitor and a resistor is further provided between the transmission interface and the circuit board.

21. A headphone, characterized in that, A headphone main body; An antenna assembly as claimed in any one of claims 16 - 20, provided in the headphone main body.

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