Antenna assembly and electronic equipment

Abstract

The invention provides an antenna assembly and electronic equipment. The antenna assembly comprises a feed source and a conductive member. The conductive part comprises a main body part and a radiation part which are separated by an arc-shaped radiation gap, the radiation part is provided with a first end and a second end which are arranged oppositely, and the first end and the second end are connected with the main body part respectively; the main body part is provided with a first grounding point adjacent to the first end and a second grounding point adjacent to the second end, and the first grounding point and the second grounding point are electrically connected to a ground pole; the radiation part is provided with a feeding point, the feeding point is arranged adjacent to the first end, the feeding point is used for receiving an excitation signal to excite the conductive part to support a first mode and a second mode, the first mode is used for supporting a first frequency band of circular polarization, the second mode is used for supporting a second frequency band of circular polarization, the resonance frequency point of the first frequency band is a first frequency f1, and the resonance frequency point of the second frequency band is a second frequency f2; the resonance frequency point of the second frequency band is a second frequency f2, and f2 is greater than f1. The antenna assembly provided by the embodiment of the invention is small in size.

Description

Technical Field

[0001] The present application relates to the field of communication technology, and in particular to an antenna assembly and an electronic device. Background Art

[0002] With the development of technology, electronic devices with communication functions such as mobile phones are becoming more and more popular and their functions are becoming more and more powerful. Electronic devices usually include antenna components to realize the communication function of electronic devices. However, when the antenna component in the electronic device in the related art is a circularly polarized satellite antenna, the satellite antenna usually includes multiple winding coils and is large in size. When the antenna component is used in electronic devices, it is not conducive to being set in electronic devices such as mobile phones. Summary of the invention

[0003] In a first aspect, the present application provides an antenna assembly, the antenna assembly comprising:

[0004] A feed source, used for generating an excitation signal;

[0005] A conductive member, the conductive member comprising a main body and a radiation portion separated by an arc-shaped radiation gap, the radiation portion having a first end and a second end disposed opposite to each other, the first end and the second end being connected to the main body, respectively;

[0006] The main body has a first grounding point adjacent to the first end and a second grounding point adjacent to the second end, and the first grounding point and the second grounding point are both electrically connected to the ground electrode;

[0007] The radiating portion has a feeding point, and the feeding point is arranged adjacent to the first end, and the feeding point is used to receive an excitation signal to excite the conductive member to support a first mode and a second mode, wherein the first mode is used to support a first frequency band of circular polarization, and the second mode is used to support a second frequency band of circular polarization, wherein the resonant frequency point of the first frequency band is a first frequency f1, and the resonant frequency point of the second frequency band is a second frequency f2, wherein f2>f1.

[0008] In a second aspect, the present application provides an electronic device, comprising the antenna assembly as described in the first aspect.

[0009] In summary, the antenna assembly provided in the embodiment of the present application sets an arc-shaped radiation slot in the conductive member to form a slot antenna, and sets the feeding point adjacent to the first end to excite the first mode supporting the first frequency band of circular polarization and the second mode supporting the second frequency band of circular polarization. There is no need to use multiple winding coils to form a conventional satellite antenna or GPS antenna, thereby reducing the size of the antenna assembly. When the antenna assembly is applied to an electronic device, it can be conveniently set in the electronic device and is conducive to the layout with other components in the electronic device. In addition, the antenna assembly in the embodiment of the present application can support the first frequency band and the second frequency band. Therefore, the antenna assembly is also called a dual-frequency circularly polarized antenna assembly, which can meet the satellite communication system of different frequency bands of the first frequency band or the second frequency band. Compared with one antenna assembly supporting one frequency band, the antenna assembly provided in the embodiment of the present application can support two frequency bands and can have a simpler design. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0011] Figure 1 A schematic diagram of an antenna assembly provided in one embodiment of the present application;

[0012] Figure 2 for Figure 1 A side view of the antenna assembly is shown;

[0013] Figure 3 for Figure 1 A circuit diagram of the antenna assembly shown;

[0014] Figure 4 for Figure 1 A schematic diagram of current distribution when the conductive member in the antenna assembly supports the first mode;

[0015] Figure 5 for Figure 1 A schematic diagram of the electrical length from the feeding point to the second grounding point of the conductive member in the antenna assembly shown in ;

[0016] Figure 6 for Figure 1 A schematic diagram of current distribution when the conductive member in the antenna assembly supports the second mode;

[0017] Figure 7 for Figure 1 A schematic diagram of the total length of the radiation slot in the antenna assembly shown in ;

[0018] Figure 8 for Figure 2 A schematic diagram of the gap size between the floor and the conductive member in the antenna assembly shown in ;

[0019] Fig. 9 for Figure 1 Schematic diagram of the line width size of the radiation slot in the antenna assembly shown in;

[0020] Fig.10 for Figure 1 A schematic diagram of the arc size of the radiation slot in the antenna assembly shown in ;

[0021] Fig.11 A circuit diagram of an antenna assembly provided in one embodiment of the present application;

[0022] Fig.12 for Figure 1 A schematic diagram of the identification of the radiation slot of the conductive member in the corresponding antenna assembly;

[0023] Fig.13 for Figure 1 A schematic diagram of the identification of the radiation slot of the conductive member in the corresponding antenna assembly;

[0024] Fig.14 A schematic diagram of an antenna assembly provided in another embodiment of the present application;

[0025] Fig.15 A three-dimensional schematic diagram of an electronic device provided in one embodiment;

[0026] Fig.16 for Fig.15 A rear view of the electronic device is provided;

[0027] Fig.17 A circular polarization pattern when an antenna assembly provided in an embodiment supports a first frequency band;

[0028] Fig.18 A circular polarization pattern when an antenna assembly provided in an embodiment supports a second frequency band;

[0029] Fig.19 A simulation diagram of an axial ratio when an antenna assembly provided in an embodiment supports a first frequency band;

[0030] Fig. 20 A simulation diagram of the axial ratio when the antenna assembly provided in one embodiment supports the second frequency band.

[0031] Main component numbers:

[0032] Electronic device 1, antenna assembly 10, battery cover 20, decorative element 40, display screen 50;

[0033] Feed source S, conductive member 110, through hole 110a, main body 111, first grounding point G1, second grounding point G2, radiation portion 112, first end 1121, second end 1122, feeding point P, radiation slot 113, first slot section 1131, second slot section 1132, third slot section 1133, impedance element 115, light-transmitting portion 210;

[0034] A first current I1, a second current I2, a third current I3, a fourth current I4, a fifth current I5, a first direction D1, and a second direction D2. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the 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. In addition, the reference to "embodiment" or "implementation method" in this article means that the specific features, structures or characteristics described in conjunction with the embodiments or implementation methods may be included in at least one embodiment of the present application. The appearance of this phrase in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0036] See also Figure 1 , Figure 2 and Figure 3 , Figure 1 A schematic diagram of an antenna assembly provided in one embodiment of the present application; Figure 2 for Figure 1 A side view of the antenna assembly is shown; Figure 3 for Figure 1 The circuit diagram of the antenna assembly is shown in FIG. Figure 1The antenna assembly is observed from a top view in FIG. The antenna assembly 10 includes a feed source S and a conductive member 110. The feed source S is used to generate an excitation signal. The conductive member 110 includes a main body 111 and a radiating portion 112 separated by an arc-shaped radiation gap 113. The radiating portion 112 has a first end 1121 and a second end 1122 disposed opposite to each other, and the first end 1121 and the second end 1122 are respectively connected to the main body 111. The main body 111 has a first grounding point G1 adjacent to the first end 1121 and a second grounding point G2 adjacent to the second end 1122, and the first grounding point G1 and the second grounding point G2 are both electrically connected to the ground electrode. The radiating portion 112 has a feeding point P, and the feeding point P is arranged adjacent to the first end 1121, and the feeding point P is used to receive an excitation signal to excite the conductive member 110 to support a first mode and a second mode, wherein the first mode is used to support a first frequency band of circular polarization, and the second mode is used to support a second frequency band of circular polarization, wherein the resonant frequency of the first frequency band is a first frequency f1, and the resonant frequency of the second frequency band is a second frequency f2, wherein f2>f1.

[0037] When the antenna assembly 10 is applied to the electronic device 1 (refer to Fig.15 and Fig.16 ), the conductive member 110 in the antenna assembly 10 may be a decorative member 40 of a functional component (such as a rear camera) of the electronic device 1. It is understandable that the conductive member 110 may also be a component separately provided in the electronic device 1, which is not a decorative member 40 of a functional component. The conductive member 110 is typically a large piece of metal or alloy sheet, such as copper, or an aluminum-magnesium alloy. In addition, the conductive member 110 may also be, but is not limited to, a laser direct structuring (LDS) conductive member, or a flexible printed circuit (FPC) conductive member 110, or a print direct structuring (PDS) conductive member, etc.

[0038] In the schematic diagram of this embodiment, the outer contour of the conductive member 110 is a circle as an example for illustration. In other embodiments, the outer contour of the conductive member 110 may also be a quasi-circular, elliptical, quasi-elliptical, rectangular, quasi-rectangular, or irregular shape, etc., and the outer contour of the conductive member 110 is not limited in this embodiment. In the schematic diagram of this embodiment, the outer contour of the conductive member 110 is a symmetrical circle. In other embodiments, the outer contour of the conductive member 110 may also be other symmetrical shapes, such as a rectangle, etc. It can be understood that in other embodiments, the outer contour of the conductive member 110 may also be an asymmetrical shape.

[0039] The shape of the radiation slot 113 may be, but is not limited to, a regular arc or an irregular arc. Some slot segments of the radiation slot 113 may also be straight strip-shaped slot segments. In the schematic diagram of this embodiment, the radiation slot 113 is a regular arc as an example for illustration, which should not be construed as a limitation on the embodiments of the present application.

[0040] In the schematic diagram of this embodiment, the radiation slot 113 is located at the bottom, left and right parts of the conductive member 110. It can be understood that the radiation slot 113 can be located at the top, left and right parts of the conductive member 110. To a certain extent, it can be understood that the radiation slot 113 is rotated relative to the conductive member 110. At this time, the rotation of the radiation slot 113 relative to the conductive member 110 does not affect the antenna performance of the antenna assembly 10.

[0041] The first grounding point G1 is used to be electrically connected to the ground electrode for grounding. In this embodiment, the antenna assembly 10 further includes a floor 120, and the floor 120 is spaced apart from the conductive member 110. The first grounding point G1 is electrically connected to the ground electrode by, but not limited to, electrically connecting the first grounding point G1 to the floor 120 through a conductive spring or a conductive wire. The floor 120 is usually a large piece of metal or alloy. When the antenna assembly 10 is applied to the electronic device 1, the floor 120 can be, but not limited to, the electronic device 1 (see Fig.15 and Fig.16 ), a shielding member of the display screen 50, a battery cover 20, a ground in a circuit, etc. In this embodiment, the floor 120 is taken as an example of the middle frame of the electronic device 1, which is understandable and should not constitute a limitation on the embodiment of the present application. For example, when the floor 120 is the middle frame of the electronic device 1, the middle frame can be, but is not limited to, an aluminum-magnesium alloy. The floor 120 is also called a ground pole, or a ground system.

[0042] The second grounding point G2 is used to be electrically connected to the ground electrode for grounding. In this embodiment, the antenna assembly 10 further includes a floor 120, and the floor 120 is spaced apart from the conductive member 110. The way in which the second grounding point G2 is electrically connected to the ground electrode may be, but is not limited to, electrically connecting the second grounding point G2 to the floor 120 through a conductive spring sheet or a conductive wire. The way in which the second grounding point G2 is electrically connected to the ground electrode may be the same as or different from the way in which the first grounding point G1 is electrically connected to the ground electrode, and is not limited here.

[0043] The feed point P is used to receive an excitation signal to excite the conductive member 110 to support the first mode and the second mode. In one embodiment, the feed source S is electrically connected to the feed point P to transmit the excitation signal to the radiation portion 112 of the conductive member 110 via the feed point P. The feed source S is electrically connected to the feed point P by, but not limited to, a conductive spring or a conductive wire.

[0044] The first frequency band may be, but is not limited to, a satellite frequency band for communicating with a satellite, or a GPS frequency band. The second frequency band may be, but is not limited to, a satellite frequency band for communicating with a satellite, or a GPS frequency band. Accordingly, the antenna assembly 10 may be, but is not limited to, a satellite (e.g., Beitou, Tiantong, etc.) antenna assembly 10, or a GPS antenna assembly 10.

[0045] When the first mode supports a circularly polarized first frequency band, the antenna assembly 10 has a better communication effect with a satellite using the first frequency band. When the second mode supports a circularly polarized second frequency band, the antenna assembly 10 has a better communication effect with a satellite using the second frequency band.

[0046] In addition, the resonant frequency of the first frequency band is the first frequency f1, and the resonant frequency of the second frequency band is the second frequency f2, wherein f2>f1. Therefore, the antenna assembly 10 can operate in different frequency bands. The antenna assembly 10 can communicate with the satellite using the first frequency band and the second frequency band. The antenna assembly 10 has a better communication effect.

[0047] In summary, the antenna assembly 10 provided in the embodiment of the present application sets an arc-shaped radiation slot 113 in the conductive member 110 to form a slot antenna, and sets the feeding point P adjacent to the first end 1121 to excite the first mode supporting the first frequency band of circular polarization and the second mode supporting the second frequency band of circular polarization, without using multiple winding coils to form a conventional satellite antenna or GPS antenna, thereby reducing the size of the antenna assembly 10. When the antenna assembly 10 is applied to the electronic device 1, it can be conveniently set in the electronic device 1, and is conducive to the layout with other components in the electronic device 1. In addition, the antenna assembly 10 in the embodiment of the present application can support the first frequency band and the second frequency band. Therefore, the antenna assembly 10 is also called a dual-frequency circularly polarized antenna assembly 10, which can meet the satellite communication system of different frequency bands of the first frequency band or the second frequency band. Compared with one antenna assembly 10 supporting one frequency band, the antenna assembly 10 provided in the embodiment of the present application can support two frequency bands and can have a simpler design.

[0048] See also Figure 4 , Figure 4 for Figure 1A schematic diagram of current distribution when the conductive member in the antenna assembly shown supports the first mode. When the conductive member 110 supports the first mode, the conductive member 110 is excited to generate a first current I1 and a second current I2 at the radiation slot 113. The first current I1 is along a first direction D1, the first current I1 corresponds to a quarter-wavelength mode of the first frequency band, and the maximum value of the first current I1 is adjacent to the feeding point P. The second current I2 is along a second direction D2, the second current I2 corresponds to a quarter-wavelength mode of the first frequency band, and the maximum value of the second current I2 is adjacent to the second end 1122, wherein the second direction D2 is perpendicular to the first direction D1.

[0049] In the schematic diagram of this embodiment, the first direction D1 is a horizontal direction, and the second direction D2 is a vertical direction. The first current I1 is along the first direction D1, so the first current I1 is also called a horizontal current. The second current I2 is along the second direction D2, so the second current I2 is also called a vertical current. It should be noted that in this schematic diagram, the horizontal current and the vertical current are marked next to the conductive member 110 for the convenience of indicating the direction of the horizontal current and the vertical current, and should not be understood as the specific location of the distribution of the horizontal current and the vertical current, nor should it be understood as the maximum value of the horizontal current and the maximum value of the vertical current.

[0050] It can be seen from this schematic diagram that two mutually perpendicular currents (the first current I1 and the second current I2) are distributed at the radiation slot 113. In addition, the maximum value of the first current I1 is adjacent to the feeding point P, and the maximum value of the second current I2 is adjacent to the second end 1122, that is, the second current I2 is adjacent to the second grounding point G2 which is farther away from the feeding point P. The current between the feeding point P and the second grounding point G2 is the smallest. It can be seen that when the antenna assembly 10 supports the first frequency band, the first current I1 and the second current I2 are excited at the conductive member 110 corresponding to the radiation slot 113, and the first current I1 has a current maximum value, and the second current I2 has a current maximum value, that is, the conductive member 110 has two current maximum positions when supporting the first frequency band. Therefore, in a certain sense, the first mode is also called the secondary mode.

[0051] In the antenna assembly 10 provided in this embodiment, the direction of the first current I1 (i.e., the first direction D1) is perpendicular to the direction of the second current I2 (i.e., the second direction D2), so the polarization purity of the first frequency band of circular polarization obtained according to the first current I1 and the second current I2 is high. In addition, the first current I1 corresponds to the quarter-wavelength mode of the first frequency band, and the second current I2 corresponds to the quarter-wavelength mode of the first frequency band, so the first frequency band has good radiation efficiency.

[0052] See also Figure 5 , Figure 5 for Figure 1 Schematic diagram of the electrical length from the feeding point to the second grounding point of the conductive member in the antenna assembly shown in FIG. The electrical length L1 from the feeding point P to the second grounding point G2 satisfies:

[0053] 0.4λ1≤L1≤0.6λ1

[0054] The λ1 is the wavelength corresponding to the first frequency f1.

[0055] The electrical length L1 from the feed point P to the second ground point G2 may be, but is not limited to, 0.4λ1, or 0.41λ1, or 0.42λ1, or 0.43λ1, or 0.44λ1, or 0.45λ1, or 0.46λ1, or 0.47λ1, or 0.48λ1, or 0.49λ1, or 0.5λ1. The L1 may also be other values ​​other than the above examples, as long as 0.4λ1≤L1≤0.6λ1 is satisfied.

[0056] Since the conductive member 110 is excited to generate the first current I1 and the second current I2 at the radiation slot 113. The first current I1 corresponds to the quarter-wavelength mode of the first frequency band, and the maximum value of the first current I1 is adjacent to the feeding point P. The second current I2 corresponds to the quarter-wavelength mode of the first frequency band, and the maximum value of the second current I2 is adjacent to the second end 1122, therefore, in order to be able to better excite the first current I1 and the second current I2, the electrical length L1 from the feeding point P to the second grounding point G2 is the best when it is 0.5λ1, that is, the electrical length from the feeding point P to the second grounding point G2 is half the wavelength corresponding to the first frequency of the first frequency band, which can better excite the first current I1 and the second current I2. In addition to the electrical length L1 from the feeding point P to the second grounding point G2 being 0.5λ1, the equivalent electrical length from the feeding point P to the grounding end (i.e., the second grounding point G2) farther from the radiation slot 113 is about half the wavelength of the wavelength corresponding to the first frequency. In this embodiment, L1 satisfies: 0.4λ1≤L1≤0.6λ1. L1 is a value other than λ1, but other than λ1, which satisfies 0.4λ1≤L1≤0.6λ1 and can also well stimulate the first current I1 and the second current I2.

[0057] In summary, when 0.4λ1≤L1≤0.6λ1, the first current I1 and the second current I2 can be well stimulated, and the first mode corresponding to the first frequency band can be well realized, so that the purity of the first mode is better. Therefore, the circular polarization purity of the antenna assembly 10 when supporting the first frequency band is higher and the radiation pattern is better. When the first frequency band in the antenna assembly 10 is used to communicate with the satellite, the communication effect is better.

[0058] See also Figure 6 , Figure 6 for Figure 1 A schematic diagram of current distribution when the conductive member in the antenna assembly shown supports the second mode. When the conductive member 110 supports the second mode, the conductive member 110 excites a third current I3, a fourth current I4 and a fifth current I5 corresponding to the radiation slot 113. The third current I3 is along the first direction D1, the third current I3 corresponds to the half-wavelength mode of the second frequency band, and the maximum value of the third current I3 is located in the middle of the radiation slot 113. The fourth current I4 is along the second direction D2, the fourth current I4 corresponds to the quarter-wavelength mode of the second frequency band, and the maximum value of the fourth current I4 is adjacent to the first grounding point G1. The fifth current I5 is along the second direction D2, the fifth current I5 corresponds to the quarter-wavelength mode of the second frequency band, and the maximum value of the fifth current I5 is adjacent to the second grounding point G2.

[0059] In the schematic diagram of this embodiment, the first direction D1 is a horizontal direction and the second direction D2 is a vertical direction. Therefore, the third current I3 is also called a horizontal current, the fourth current I4 is also called a vertical current, and the fifth current I5 is also called a vertical current.

[0060] It can be seen from this schematic diagram that two vertical currents (i.e., the fourth current I4 and the fifth current I5) and one horizontal current (i.e., the third current I3) are distributed at the radiation slot 113. In addition, it can be seen from this schematic diagram that the currents at the grounding points corresponding to the two ends of the radiation slot 113 (i.e., the first grounding point G1 and the second grounding point G2) and the middle point of the radiation slot 113 are the largest, that is, the maximum value of the third current I3 is located in the middle of the radiation slot 113, the maximum value of the fourth current I4 is adjacent to the first grounding point G1, and the maximum value of the fifth current I5 is adjacent to the second grounding point G2. In addition, it can be seen from the schematic diagram of this embodiment that the current at one-third of the distance from one of the two ends of the radiation slot 113 is the smallest, and the current at one-third of the distance from the other of the two ends of the radiation slot 113 is the smallest. Therefore, the total equivalent electrical length of the radiation slot 113 is about three quarters of the wavelength of the second frequency band. It can be seen that when the antenna assembly 10 supports the second frequency band, the third current I3, the fourth current I4 and the fifth current I5 are excited at the conductive member 110 corresponding to the radiation slot 113, and the third current I3, the fourth current I4 and the fifth current I5 have maximum values, that is, the conductive member 110 has three positions of current maximum values ​​when supporting the second frequency band. Therefore, in a certain sense, the second mode is also called the cubic mode.

[0061] It should be noted that in this schematic diagram, the horizontal current and the vertical current are marked next to the conductive member 110 for the convenience of indicating the direction of the horizontal current and the vertical current. The marked positions should not be understood as the specific locations of the distribution of the horizontal current and the vertical current, nor should they be understood as the maximum values ​​of the horizontal current and the vertical current.

[0062] In the antenna assembly 10 provided in this embodiment, the direction of the third current I3 (i.e., the first direction D1) is respectively perpendicular to the direction of the fourth current I4 (i.e., the second direction D2) and the direction of the fifth current I5 (i.e., the second direction D2), so the polarization purity of the second frequency band of circular polarization obtained according to the third current I3, the fourth current I4, and the fifth current I5 is relatively high. In addition, the third current I3 corresponds to the half-wavelength mode of the second frequency band, the fourth current I4 corresponds to the quarter-wavelength mode of the second frequency band, and the fifth current I5 corresponds to the quarter-wavelength mode of the second frequency band, so the polarization purity of the second frequency band of circular polarization obtained according to the third current I3, the fourth current I4, and the fifth current I5 is relatively high, and the antenna assembly 10 has good radiation efficiency in the second frequency band.

[0063] See also Figure 7 , Figure 7 for Figure 1 Schematic diagram of the total length of the radiation slot in the antenna assembly shown in FIG. The total length L2 of the radiation slot 113 satisfies:

[0064] 0.8λ2≤L2≤1.2λ2;

[0065] Wherein, the λ2 is the wavelength corresponding to the second frequency f2.

[0066] The total length of the radiation slot 113 refers to the total dimension along the extension direction of the radiation slot 113. The total length L2 of the radiation slot 113 may be, but is not limited to, 0.8λ2, 0.9λ2, 1.0λ2, 1.1λ2, or 1.2λ2. The L2 may also be other values ​​other than the above examples, as long as 0.8λ2≤L2≤1.2λ2 is satisfied.

[0067] Since the third current I3, the fourth current I4 and the fifth current I5 are excited at the conductive member 110 corresponding to the radiation slot 113, the third current I3 corresponds to the half-wavelength mode of the second frequency band, the fourth current I4 corresponds to the quarter-wavelength mode of the second frequency band, the fifth current I5 corresponds to the quarter-wavelength mode of the second frequency band, and the current of the grounding points corresponding to the two ends of the radiation slot 113 (i.e., the first grounding point G1 and the second grounding point G2) is the largest, therefore, in order to be able to better excite the third current I3, the fourth current I4 and the fifth current I5, the L2 satisfies: L2 = 1.0λ2 for the best effect, that is, the radiation slot When the total length of the slot 113 is one wavelength of the second frequency corresponding to the second frequency band, the third current I3, the fourth current I4 and the fifth current I5 can be well stimulated. In addition to the total length of the radiation slot 113 being one wavelength of the second frequency corresponding to the second frequency band, the total length of the radiation slot 113 can be about one wavelength corresponding to the second frequency. In this embodiment, L2 satisfies 0.8λ2≤L2≤1.2λ2. When L2 is other values ​​other than λ2 but satisfies 0.8λ2≤L2≤1.2λ2, the third current I3, the fourth current I4 and the fifth current I5 can be well stimulated.

[0068] In summary, when 0.8λ2≤L2≤1.2λ2, the third current I3, the fourth current I4 and the fifth current I5 can be well stimulated, and the second mode corresponding to the second frequency band can be well realized, so that the purity of the second mode is better. Therefore, the circular polarization purity of the antenna assembly 10 when supporting the second frequency band is higher and the radiation pattern is better. When the second frequency band in the antenna assembly 10 is used to communicate with the satellite, the communication effect is better.

[0069] See also Figure 8 , Figure 8 for Figure 2 Schematic diagram of the gap size between the floor and the conductive member in the antenna assembly shown in . The antenna assembly 10 also includes a floor 120. The floor 120 is spaced apart from the conductive member 110, and the first grounding point G1 and the second grounding point G2 are respectively electrically connected to the floor 120 for grounding, wherein the gap d1 between the floor 120 and the conductive member 110 satisfies: d1 ≥ 0.02λ c , where λ c f c The corresponding wavelength, f c =(f1+f2) / 2.

[0070] f c=(f1+f2) / 2, that is, the frequency fc is the middle frequency between the first frequency and the second frequency. When the gap d1 between the floor 120 and the conductive member 110 is too small, for example, d1<0.02λ c When the conductive member 110 is subjected to collision, impact, or other factors, it is easy for the conductive member 110 to contact the floor 120, thereby causing the conductive member 110 to be grounded as a whole and unable to work. In the antenna assembly 10 provided in this embodiment, the gap d1 between the floor 120 and the conductive member 110 satisfies: d1 ≥ 0.02λ c When the conductive member 110 is placed at a certain distance from the floor 120, the conductive member 110 can work better.

[0071] It should be noted that the relationship between the various frequency bands and wavelengths mentioned in the antenna assembly 10 provided in the above embodiments is described as follows. The relationship between each frequency f and the corresponding wavelength λ is λ=cf, where c is the speed of light. Specifically, the wavelength λ1 corresponding to the first frequency f1 satisfies λ1=cf1; the wavelength λ2 corresponding to the second frequency f2 satisfies λ2=cf2; accordingly, λ c =cf c .

[0072] See also Fig. 9 , Fig. 9 for Figure 1 Schematic diagram of the line width size of the radiation slot in the antenna assembly shown in FIG. The line width W of the radiation slot 113 satisfies:

[0073] 0.02λ c ≤W≤0.05λ c ;

[0074] Among them, λ c f c The corresponding wavelength, f c =(f1+f2) / 2.

[0075] The line width of the radiation slot 113 may be, but is not limited to, 0.02λ c , or 0.03λ c , or 0.04λ c , or 0.05λ c , can also be other values ​​besides the above examples, as long as 0.02λ is satisfied c ≤W≤0.05λ c That's it.

[0076] If the radiation gap 113 is too large or too small, it cannot stimulate the first mode and the second mode well, nor can it stimulate the currents corresponding to the first mode (the first current I1 and the second current I2), nor can it stimulate the currents corresponding to the second mode (the third current I3, the fourth current I4 and the fifth current I5).

[0077] The line width W of the radiation slot 113 of the antenna assembly 10 provided in this embodiment satisfies 0.02λ c ≤W≤0.05λ c , it can better excite the first mode and the second mode, better excite the various currents corresponding to the first mode (the first current I1 and the second current I2), and better excite the various currents corresponding to the second mode (the third current I3, the fourth current I4 and the fifth current I5), so as to form the first frequency band and the second frequency band with better circular polarization purity.

[0078] See also Fig.10 , Fig.10 for Figure 1 A schematic diagram of the arc size of the radiation slot in the antenna assembly is shown in FIG. The arc θ of the radiation slot 113 satisfies: 120°≤θ≤240°.

[0079] The arc θ can be, but is not limited to, 120°, 130°, 140°, 150°, 160°, 170°, 180°, 190°, 200°, 210°, 220°, 230°, or 240°, or can be other values ​​besides the above examples, as long as 120°≤θ≤240° is satisfied.

[0080] Generally, in order to better stimulate the current along the first direction D1 and the current along the second direction D2, the arc of the radiation slot 113 is 180°. In addition, when the radiation slot 113 is about 180°, such as 180°±60° (i.e., 120°≤θ≤240°), the current in the first direction D1 and the current in the second direction D2 can also be better stimulated. If the radiation slot 113 is less than 120°, or the radiation slot 113 is greater than 240°, the first frequency band of circular polarization and the second frequency band of circular polarization cannot be well supported.

[0081] It can be seen that in the antenna assembly 10 provided in the embodiment of the present application, the curvature θ of the radiation slot 113 satisfies: 120°≤θ≤240°, which can better excite the current along the first direction D1 and the current along the second direction D2, thereby forming a first frequency band signal and a second frequency band signal with better circular polarization purity.

[0082] See also Fig.11, Fig.11 The circuit diagram of the antenna assembly provided in one embodiment of the present application. The antenna assembly 10 further includes an impedance element 115. At least one of the first grounding point G1 and the second grounding point G2 is electrically connected to the impedance element 115 to the ground, and the impedance element 115 is used to adjust the equivalent electrical length of the radiation slot 113.

[0083] In this embodiment, the antenna element includes two impedance elements 115 as an example for illustration. For the convenience of description, the two impedance elements 115 are named impedance element 115a and impedance element 115b respectively. The first grounding point G1 electrically connects the impedance element 115a to the ground, and the second grounding point G2 electrically connects the impedance element 115b to the ground. It can be understood that in other embodiments, the antenna component 10 includes an impedance element 115, the first grounding point G1 is electrically connected to the impedance element 115 to the ground, and the second grounding point G2 is directly electrically connected to the ground. In another other embodiment, the antenna component 10 includes an impedance element 115, the second grounding point G2 is electrically connected to the impedance element 115 to the ground, and the first grounding point G1 is directly electrically connected to the ground. It should be noted that the impedance element 115 can be a single element or a combination of multiple elements. For example, the impedance element 115 can include at least one of the following situations: capacitance, inductance, series connection of capacitance and inductance, parallel connection of capacitance and inductance, etc.

[0084] The impedance element 115 is used to adjust the equivalent electrical length of the radiation slot 113, thereby adjusting the first frequency band and the second frequency band supported by the antenna assembly 10. The antenna assembly 10 includes the impedance element 115, which can adjust the first frequency band and the second frequency band supported by the antenna assembly 10, so that the antenna assembly 10 can communicate using a more appropriate frequency band.

[0085] See also Fig.12 , Fig.12 for Figure 1Schematic diagram of the identification of the radiation slot of the conductive part in the corresponding antenna assembly. The radiation slot 113 has a first slot section 1131, a second slot section 1132 and a third slot section 1133. At least part of the first slot section 1131 extends along the first direction D1. The second slot section 1132 is adjacent to the first grounding point G1, the second slot section 1132 is connected to the first slot section 1131, and at least part of the second slot section 1132 extends along the second direction D2, wherein the second direction D2 is perpendicular to the first direction D1. The third slot section 1133 is adjacent to the second grounding point G2, the third slot section 1133 is connected to the second slot section 1132, and the third slot section 1133 and the second slot section 1132 are respectively connected to the two ends of the first slot section 1131, and at least part of the third slot section 1133 extends along the second direction D2.

[0086] At least a portion of the first slot segment 1131 extends along the first direction D1, so a first current I1 can be excited at the first slot segment 1131; and a third current I3 can be excited at the first slot segment 1131. The second slot segment 1132 is adjacent to the first grounding point G1, and at least a portion of the second slot segment 1132 extends along the second direction D2, so a fourth current I4 can be excited at the second slot segment 1132. The third slot segment 1133 is adjacent to the second grounding point G2, and at least a portion of the third slot segment 1133 extends along the second direction D2, so a second current I2 and a fifth current I5 can be excited at the third slot segment 1133. It can be seen that the above-mentioned structural design of the radiation slot 113 of the conductive part 110 in the antenna assembly 10 provided in the embodiment of the present application can better excite the first current I1 and the second current I2, and therefore, can better support the first frequency band of circular polarization; the above-mentioned structural design of the radiation slot 113 of the conductive part 110 in the antenna assembly 10 can better excite the third current I3, the fourth current I4 and the fifth current I5, and therefore, can better support the second frequency band of circular polarization, so that the antenna assembly 10 has a better communication effect.

[0087] In the schematic diagram of this embodiment, the radiation slot 113 is an arc-shaped example, the first slot segment 1131 is an arc segment, the second slot segment 1132 is an arc segment, and the third slot segment 1133 is an arc segment. In the schematic diagram of this embodiment, the feeding point P is located in the first slot segment 1131 as an example.

[0088] See also Fig.13 , Fig.13 for Figure 1Schematic diagram of the identification of the radiation slot of the conductive member in the corresponding antenna assembly. In this embodiment, the radiation slot 113 has a first slot section 1131, a second slot section 1132 and a third slot section 1133. At least part of the first slot section 1131 extends along the first direction D1. The second slot section 1132 is adjacent to the first grounding point G1, the second slot section 1132 is connected to the first slot section 1131, and at least part of the second slot section 1132 extends along the second direction D2, wherein the second direction D2 is perpendicular to the first direction D1. The third slot section 1133 is adjacent to the second grounding point G2, the third slot section 1133 is connected to the second slot section 1132, and the third slot section 1133 and the second slot section 1132 are respectively connected to the two ends of the first slot section 1131, and at least part of the third slot section 1133 extends along the second direction D2.

[0089] With the front Fig.12 The difference between the conductive member 110 and the radiation slot 113 is that Fig.12 In the embodiment, the outer contour of the conductive member 110 is circular, and the radiation gap 113 is arc-shaped; Fig.13 In the embodiment, the outer contour of the conductive member 110 is a rectangular shape, and the shape of the radiation slot 113 is also changed, which is described in detail as follows. In this embodiment, the first slot segment 1131, the second slot segment 1132, and the third slot segment 1133 are all straight strips, the connection between the first slot segment 1131 and the second slot segment 1132 is an arc, and the connection between the first slot segment 1131 and the third slot segment 1133 is an arc. It can be understood that in other embodiments, the first slot segment 1131, the second slot segment 1132, and the third slot segment 1133 are all straight strips, the connection between the first slot segment 1131 and the second slot segment 1132 is a right angle, and the connection between the first slot segment 1131 and the third slot segment 1133 is a right angle. Fig.13 The shape of the radiation slot 113 shown is also considered to be U-shaped.

[0090] It should be noted that, in the antenna assembly 10 described in the above embodiments, the number of the radiating portion 112 is one for illustration, and therefore, the antenna assembly 10 described in the above embodiments includes one antenna. In other embodiments, the antenna assembly 10 may include multiple antennas, as described below. Fig.14 , Fig.14 This is a schematic diagram of an antenna assembly provided in another embodiment of the present application. The conductive member 110 has a plurality of radiation portions 112 and a plurality of radiation slots 113 , and each radiation portion 112 is separated from the main body portion 111 by a corresponding arc-shaped radiation slot 113 .

[0091] In the schematic diagram of this embodiment, the conductive member 110 is provided with two radiating portions 112, and the conductive member 110 is provided with two radiating slots 113. For the convenience of description, the two radiating portions 112 are respectively named as radiating portions 112a and 112b, and the two radiating slots 113 are respectively named as radiating slots 113a and 113b. The radiating portion 112a is separated from the main body 111 by the radiating slots 113a, and the radiating portion 112b is separated from the main body 111 by the radiating slots 113b. The radiating portion 112a, the radiating slots 113a and the main body 111 constitute a first antenna, and the radiating portion 112b, the radiating slots 113b and the main body 111 constitute a second antenna. The first antenna or the second antenna can refer to the description of the antenna assembly 10 provided in the previous embodiments, and will not be repeated here. The first frequency band in the second antenna may be the same as or different from the first frequency band in the first antenna; correspondingly, the second frequency band in the second antenna may be the same as or different from the second frequency band in the first antenna.

[0092] The feeding point of the radiating portion 112a is marked as P, and the feeding point of the radiating portion 112b is marked as P'. Correspondingly, the grounding points of the main body 111 are marked as G1, G2, G1' and G2' respectively. Among them, the first grounding point G1 and the second grounding point G2 correspond to the radiating portion 112a, and the first grounding point G1' and the second grounding point G2' correspond to the radiating portion 112b.

[0093] The conductive member 110 has a plurality of radiation portions 112 and a plurality of radiation slots 113. Each radiation portion 112 is separated from the main body portion 111 by a corresponding arc-shaped radiation slot 113. Therefore, the antenna assembly 10 can form a plurality of antennas. When the frequency bands supported by the plurality of antennas are different, the antenna assembly 10 has more communication frequency bands. When some of the frequency bands supported by the plurality of antennas are the same, the same frequency bands can have better radiation performance.

[0094] The present application also provides an electronic device 1. Fig.15 and Fig.16 , Fig.15 A three-dimensional schematic diagram of an electronic device provided in one embodiment; Fig.16 for Fig.15A back view of an electronic device is provided. The electronic device 1 includes but is not limited to mobile phones, telephones, televisions, tablet computers (Pads), cameras, personal computers, laptop computers (Personal Computers, PCs), vehicle-mounted devices, headphones, watches, wearable devices, base stations, vehicle-mounted radars, customer premise equipment (Customer Premise Equipment, CPE) and other devices that can send and receive electromagnetic wave signals. In this application, the electronic device 1 is taken as an example of a mobile phone, and other devices can refer to the specific description in this application. In addition, the electronic device 1 can be but is not limited to a device with or without a display screen 50. The electronic device 1 includes an antenna assembly 10 as provided in any of the previous embodiments. Please refer to the previous description of the antenna assembly 10, which will not be repeated here.

[0095] The electronic device 1 includes a battery cover 20 functional component and a decorative element 40. The decorative element 40 (deco) is disposed on the outer surface of the battery cover 20, and the decorative element 40 also serves as the conductive element 110 in the antenna assembly 10.

[0096] In one embodiment, the battery cover 20 has a light-transmitting portion 210. Functional Components The light-transmitting portion 210 is used to correspond to the functional components of the electronic device 1. The decorative element 40 (deco) is disposed on the outer surface of the battery cover 20 to decorate the functional components, and the decorative element 40 also serves as the conductive element 110 in the antenna assembly 10.

[0097] The functional component may be, but is not limited to, a rear camera. In this embodiment, the decorative component 40 is also reused as the conductive component 110 of the antenna component 10, thereby achieving device reuse), and almost no additional space of the electronic device 1 is occupied, which is conducive to reducing the number of devices in the electronic device 1 and facilitating the miniaturization and thinness of the electronic device 1. When the functional component is a rear camera of the electronic device 1, the decorative component 40 is reused as the conductive component 110 of the antenna component 10. In other words, the conductive component 110 of the antenna component 10 is conformally designed with the decorative component 40 of the electronic device 1.

[0098] It is understandable that in other embodiments, the conductive member 110 of the antenna assembly 10 may not be reused with the decorative member 40 , and the present application does not limit this.

[0099] Understandably, in Fig.16 and Fig.13In the embodiment, the conductive member 110 further includes a through hole 110a. When the electronic device 1 further includes a functional component (such as a rear camera), the functional component works (for example, takes pictures) through the through hole 110a. It can be understood that the conductive member 110 in the antenna assembly 10 provided in the previous embodiments does not have a through hole, and the embodiments of the present application do not limit whether the conductive member 110 includes the through hole 110a.

[0100] In addition, in one embodiment, the electronic device 1 further includes a display screen 50, and the display screen 50 is arranged opposite to the battery cover 20 to form a receiving space, and the receiving space is used to receive circuit boards, functional components, etc.

[0101] In one embodiment, when the battery cover 20 is made of metal or alloy, the battery cover 20 can also serve as the floor 120 .

[0102] In addition, the electronic device 1 further comprises a circuit board, and the circuit board is arranged in the receiving space. When the antenna assembly 10 comprises a feed source S, the feed source S may be arranged on the circuit board.

[0103] In addition, the electronic device 1 also includes a battery, functional devices (the functional devices may include one or more of a camera module, a microphone, a receiver, a speaker, a face recognition module, and a fingerprint recognition module) and other devices that can realize the basic functions of the mobile phone, which will not be described in detail in this embodiment. It can be understood that the above introduction to the electronic device 1 is only an explanation of an environment in which the antenna assembly 10 is applied, and the specific structure of the electronic device 1 should not be understood as a limitation on the antenna assembly 10 provided in this application.

[0104] The performance of the antenna assembly 10 provided in each embodiment of the present application is analyzed below. Fig.17 and Fig.18 , Fig.17 A circular polarization pattern when an antenna assembly provided in an embodiment supports a first frequency band; Fig.18 The circular polarization pattern of the antenna assembly provided in one embodiment when supporting the second frequency band. In this embodiment, the conductive member 110 in the antenna assembly 10 is used as the decorative member 40 of the functional component in the electronic device 1 as an example for simulation. It can be understood that this should not be understood as a limitation on the embodiment of the present application. Fig.17 It can be seen that the antenna assembly 10 has a good circular polarization pattern in the first frequency band and has good directional radiation. Fig.17 It can also be seen that the radiation direction of the antenna assembly 10 when supporting the first frequency band is perpendicular to the battery cover 20 and faces away from the battery cover 20. Fig.18It can be seen that the antenna assembly 10 has a good circular polarization pattern in the second frequency band and has good directional radiation. Fig.18 It can also be seen that the radiation direction of the antenna assembly 10 when supporting the second frequency band is perpendicular to the battery cover 20 and faces away from the battery cover 20 .

[0105] In the schematic diagram, the first frequency is 1.9 GHz and the second frequency is 2.4 GHz. It can be understood that this should not be construed as a limitation on the first frequency and the second frequency in the antenna assembly 10 provided in the embodiment of the present application.

[0106] When a user uses the electronic device 1 to which the antenna assembly 10 is applied to communicate with a satellite (such as making a phone call), the user usually points the display screen 50 of the electronic device 1 toward the user's head, while the battery cover 20 and the decorative member 40 of the electronic device 1 usually face away from the user's head. Fig.17 and Fig.18 It can be seen that the orientation of the antenna assembly 10 when supporting the first frequency band and the second frequency band is away from the direction of the battery cover 20, that is, away from the user's head, thereby effectively reducing or avoiding the problem of the user's head (human head) being blocked when the electronic device 1 used by the antenna assembly 10 communicates with the satellite (such as making a phone call), which is beneficial to improving the communication effect and reducing the radiation to the user's head.

[0107] Please also read Fig.19 and Fig. 20 , Fig.19 A simulation diagram of an axial ratio when an antenna assembly provided in an embodiment supports a first frequency band; Fig. 20 The axial ratio simulation diagram of the antenna assembly provided in one embodiment when supporting the second frequency band. Fig.19 It can be seen that the antenna assembly 10 has a lower axial ratio in the first frequency band, which means that the antenna assembly 10 has a higher gain and a higher circular polarization purity when supporting the first frequency band. When the first frequency band of the antenna assembly 10 is used for positioning, the positioning effect is better. Fig. 20 It can be seen that the antenna assembly 10 has a lower axial ratio in the second frequency band, indicating that the antenna assembly 10 has a higher gain and a higher circular polarization purity when supporting the second frequency band. When the second frequency band of the antenna assembly 10 is used for positioning, the positioning effect is better.

[0108] The above is part of the implementation methods of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications are also considered to be within the scope of protection of the present application.

Claims

1. An antenna assembly, characterized in that: The antenna assembly comprises: A feed source, used for generating an excitation signal; A conductive member, the conductive member comprising a main body and a radiation portion separated by an arc-shaped radiation gap, the radiation portion having a first end and a second end disposed opposite to each other, the first end and the second end being connected to the main body, respectively; The main body has a first grounding point adjacent to the first end and a second grounding point adjacent to the second end, and the first grounding point and the second grounding point are both electrically connected to the ground electrode; The radiating portion has a feeding point, and the feeding point is arranged adjacent to the first end, and the feeding point is used to receive an excitation signal to excite the conductive member to support a first mode and a second mode, wherein the first mode is used to support a first frequency band of circular polarization, and the second mode is used to support a second frequency band of circular polarization, wherein the resonant frequency point of the first frequency band is a first frequency f1, and the resonant frequency point of the second frequency band is a second frequency f2, wherein f2>f1.

2. The antenna assembly according to claim 1, wherein: When the conductive element supports the first mode, the conductive element is excited at the radiation gap: a first current, wherein the first current is along a first direction, the first current corresponds to a quarter-wavelength mode of the first frequency band, and a maximum value of the first current is adjacent to the feeding point; and A second current is along a second direction, the second current corresponds to a quarter-wavelength mode of the first frequency band, and a maximum value of the second current is adjacent to the second end, wherein the second direction is perpendicular to the first direction.

3. The antenna assembly according to claim 2, wherein: The electrical length L1 from the feeding point to the second grounding point satisfies: 0.4λ1≤L1≤0.6λ1; The λ1 is the wavelength corresponding to the first frequency f1.

4. The antenna assembly according to claim 1 or 2, characterized in that: When the conductive element supports the second mode, the conductive element is excited at the radiation slot: a third current, wherein the third current is along the first direction, the third current corresponds to a half-wavelength mode of the second frequency band, and a maximum value of the third current is located in the middle of the radiation gap; a fourth current, wherein the fourth current is along the second direction, the fourth current corresponds to a quarter-wavelength mode of the second frequency band, and a maximum value of the fourth current is adjacent to the first grounding point; and a fifth current, wherein the fifth current is along the second direction, the fifth current corresponds to a quarter-wavelength mode of the second frequency band, and a maximum value of the fifth current is adjacent to the second ground point.

5. The antenna assembly according to claim 4, characterized in that The total length L2 of the radiation gap satisfies: 0.8λ2≤L2≤1.2λ2; Wherein, the λ2 is the wavelength corresponding to the second frequency f2.

6. The antenna assembly according to claim 1, wherein: The antenna assembly further comprises: A floor, the floor and the conductive member are spaced apart, the first grounding point and the second grounding point are electrically connected to the floor for grounding, wherein the gap d1 between the floor and the conductive member satisfies: d1 ≥ 0.02λ c , where λ c f c The corresponding wavelength, f c =(f1+f2) / 2.

7. The antenna assembly according to claim 1, wherein: The line width W of the radiation gap satisfies: 0.02m c ≤W≤0.05λ c ; Among them, λ c f c The corresponding wavelength, f c =(f1+f2) / 2.

8. The antenna assembly according to claim 1, wherein: The arc angle θ of the radiation gap satisfies: 120°≤θ≤240°.

9. The antenna assembly according to claim 1, wherein: The antenna assembly further comprises: An impedance element, at least one of the first grounding point and the second grounding point is electrically connected to the ground, and the impedance element is used to adjust the equivalent electrical length of the radiation slot.

10. The antenna assembly according to claim 1, wherein: The radiation gap has: a first slit segment, at least a portion of which extends along a first direction; a second slot segment, the second slot segment being adjacent to the first grounding point, the second slot segment being connected to the first slot segment, and at least a portion of the second slot segment extending along a second direction, wherein the second direction is perpendicular to the first direction; and A third slot segment, the third slot segment is adjacent to the second grounding point, the third slot segment is connected to the second slot segment, and the third slot segment and the second slot segment are respectively connected to two ends of the first slot segment, and at least a portion of the third slot segment extends along the second direction.

11. The antenna assembly according to claim 1, wherein: The conductive member has a plurality of radiation portions and a plurality of radiation gaps, and each radiation portion is spaced from the main body portion by a corresponding arc-shaped radiation gap.

12. An electronic device, characterized in that: The electronic device comprises the antenna assembly as described in any one of claims 1-11.

13. The electronic device according to claim 12, characterized in that: The electronic device comprises: battery cover; and A decorative piece is arranged on the outer surface of the battery cover, and the decorative piece also serves as a conductive piece in the antenna assembly.

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