Double-feed-in antenna structure

Abstract

The invention provides a double-feed antenna structure. The double-feed antenna structure comprises an antenna body, a first feed point, a second feed point and a grounding assembly, the antenna body comprises a first arm, a second arm and a connecting piece. The first arm is adjacent to the second arm, and the connecting piece is connected with the first arm and the second arm. The first feed-in point is arranged on the first arm. The second feed-in point is arranged on the second arm. The grounding assembly is arranged between the first feed-in point and the second feed-in point, and the distance between the first feed-in point and the grounding assembly is smaller than the distance between the second feed-in point and the grounding assembly.

Description

Technical Field

[0001] The present invention relates to an antenna structure, and more particularly, to a dual-feed antenna structure for generating complementary antenna radiation patterns. Background Art

[0002] With the development of technology and the improvement of living standards, 3C products are widely used in daily life, and headphones are one of the most common 3C products. People usually use headphones in public places to avoid disturbing others. Headphones include wired headphones and wireless headphones. Since wireless headphones have the advantages of high convenience, lightness and practicality, and freedom from wire troubles, wired headphones are gradually replaced by wireless headphones.

[0003] Generally speaking, the inside of the earphone contains an antenna, and the antenna generates a radiation pattern to receive external signals (such as audio signals from a mobile phone). Common earphones are only equipped with one antenna, that is, the earphone can only generate one radiation pattern. Since the size and design of the antenna will vary depending on the internal space of the earphone, the shape and coverage of the radiation pattern generated by the antenna will be different. If the radiation pattern generated by the earphone cannot cover the distance range that the signal source can transmit, a dead angle for receiving signals will be generated and the earphone reception will be interrupted, thereby affecting the user experience. Therefore, in the existing technology, two antennas have been installed in one earphone and the two antennas generate two radiation patterns respectively to reduce the dead angle for receiving signals. However, when two antennas are installed in one earphone at the same time, not only the volume and material cost of the earphone will increase, but also the portability will be reduced. Furthermore, with the trend of miniaturization of electronic products, larger earphones gradually do not meet market demand. Because the internal space of the earphone is limited, the layout of the antenna still cannot fully consider the radiation pattern, thereby reducing the quality of receiving signals. Summary of the invention

[0004] In view of this, the present invention provides a dual-feed antenna structure to solve the problems in the prior art.

[0005] In a specific embodiment, the dual-feed antenna structure of the present invention includes an antenna body, a first feed point, a second feed point and a grounding component. The antenna body includes a first arm, a second arm and a connector. The first arm is disposed adjacent to the second arm, and the connector connects the first arm and the second arm. The first feed point is disposed on the first arm. The second feed point is disposed on the second arm. The grounding component is disposed between the first feed point and the second feed point, and the distance between the first feed point and the grounding component is less than the distance between the second feed point and the grounding component.

[0006] The antenna body receives a signal through a first feeding point to generate a first current and a first radiation pattern, and the antenna body receives a signal through a second feeding point to generate a second current and a second radiation pattern. The first current flows from the first arm to the second arm, and the second current flows from the second arm to the first arm, and the first current and the second current exist alternately.

[0007] The current direction of the first current in the area with the highest current density and the current direction of the second current in the area with the highest current density are in different axis directions.

[0008] The area with the maximum current density of the first current is located on the connecting piece.

[0009] The area with the maximum current density of the second current is located on the second arm.

[0010] The size of the first arm is larger than the size of the second arm.

[0011] Wherein, the first arm and the second arm are arranged in parallel.

[0012] The current direction of the first current in the area with the highest current density and the current direction of the second current in the area with the highest current density are perpendicular to each other.

[0013] The antenna envelope correlation coefficient (EnvelopeCorrelation Coefficient, ECC) between the first radiation pattern and the second radiation pattern is less than 0.3.

[0014] The first radiation pattern and the second radiation pattern are complementary radiation patterns.

[0015] The first feeding point is arranged at the end of the first arm away from the connecting member, and the second feeding point is arranged at the end of the second arm away from the connecting member.

[0016] The first feeding point is arranged at a position where the end of the first arm is close to the grounding component.

[0017] The antenna body is in a C-shape.

[0018] Wherein, the grounding component does not contact the antenna body.

[0019] In summary, the dual-feed antenna structure of the present invention uses a single antenna structure and an asymmetric structure between the antenna body and the grounding element to achieve a dual antenna effect by stimulating dual feed points, thereby reducing space design requirements and material costs. In addition, the dual-feed antenna structure of the present invention alternately generates currents of different angles and two complementary radiation patterns through the stimulation of dual feed points to reduce the reception dead angle, thereby improving the reception quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 FIG. 4 is a schematic structural diagram of a dual-feed antenna structure according to a specific embodiment of the present invention.

[0021] Figure 2 FIG. 4 is a diagram showing a current distribution diagram of a dual-feed antenna structure when a first feed point is excited according to a specific embodiment of the present invention.

[0022] Figure 3 FIG. 4 is a diagram showing the current distribution of a dual-feed antenna structure when the second feed point is excited according to a specific embodiment of the present invention.

[0023] Figure 4 FIG. 4 is a diagram showing a distribution diagram of a first radiation pattern and a second radiation pattern on a plane according to a specific embodiment of the present invention.

[0024] Figure 5 FIG. 4 is a diagram showing a distribution diagram of a first radiation pattern and a second radiation pattern on another plane according to a specific embodiment of the present invention.

[0025] Figure 6 FIG. 4 is a diagram showing a distribution diagram of a first radiation pattern and a second radiation pattern on another plane according to a specific embodiment of the present invention.

[0026] Figure 7 FIG. 4 is a functional block diagram illustrating a dual-feed antenna structure applied to an antenna control system according to a specific embodiment of the present invention.

[0027] Figure 8 FIG. 4 is a flowchart showing the steps of controlling a dual-feed antenna structure according to a specific embodiment of the present invention.

[0028] Explanation of symbols

[0029] 1: Dual-feed antenna structure

[0030] 11: Antenna body

[0031] 111A: First Arm

[0032] 111B: Second Arm

[0033] 112: Connectors

[0034] 12A: First feeding point

[0035] 12B: Second feeding point

[0036] 13: Grounding components

[0037] P1: The first radiation pattern

[0038] P2: Second radiation pattern

[0039] P3: Total radiation pattern

[0040] S1: The first blind spot

[0041] S2: The second blind spot

[0042] S3: The third reception blind spot

[0043] 2: Control module

[0044] 21: Signal generator

[0045] 22: Controller

[0046] 3: Toggle switch

[0047] S: Antenna control system

[0048] S1~S5: Steps DETAILED DESCRIPTION

[0049] In order to make the advantages, spirit and features of the present invention easier and clearer to understand, the following will be described and discussed in detail with reference to the accompanying drawings and embodiments. It is worth noting that these embodiments are only representative embodiments of the present invention, and the specific methods, devices, conditions, materials, etc. exemplified therein are not intended to limit the present invention or the corresponding embodiments.

[0050] See also Figure 1 . Figure 1 FIG. 1 is a schematic diagram showing a dual-feed antenna structure 1 according to a specific embodiment of the present invention. Figure 1 As shown, in this specific embodiment, the dual-feed antenna structure 1 includes an antenna body 11, two feeding points and a grounding component 13. The two feeding points are arranged on the antenna body 11, and the grounding component 13 is arranged between the two feeding points. In practice, the dual-feed antenna structure 1 of the present invention can be applied to a Bluetooth headset, but is not limited thereto, and the dual-feed antenna structure 1 can also be applied to other wireless signal transceiver devices.

[0051] In this specific embodiment, the antenna body 11 includes a first arm 111A, a second arm 111B, and a connecting member 112. The second arm 111B is disposed adjacent to the first arm 111A, and the connecting member 112 connects the first arm 111A and the second arm 111B. Figure 1As shown, the shape of the antenna body 11 can be roughly C-shaped and can be set on a circuit board. The shape of the first arm 111A and the second arm 111B is roughly long and includes two ends respectively, and the connecting member 112 is connected to the ends on the same side of the first arm 111A and the second arm 111B. The first arm 111A and the second arm 111B are arranged in parallel, and the connecting member 112 vertically connects the first arm 111A and the second arm 111B respectively. The size (width) of the first arm 111A is greater than the size (width) of the second arm 111B. In practice, the width of the first arm 111A and the width of the second arm 111B can also be the same. It is worth noting that in this specific embodiment, the shape of the first arm 111A is L-shaped, and the shape of the second arm 111B is T-shaped, but it is not limited to this in practice, and the shapes of the first arm 111A and the second arm 111B can also be determined according to the design. In addition, the first arm 111A, the second arm 111B and the connecting member 112 may also be integrally formed.

[0052] The dual-feed antenna structure 1 includes a first feed point 12A and a second feed point 12B. The first feed point 12A is disposed on the first arm 111A, and the second feed point 12B is disposed on the second arm 111B. Further, the first feed point 12A is disposed at the end of the first arm 111A away from the connector 112, and the second feed point 12B is disposed at the end of the second arm 111B away from the connector 112. The antenna body 11 can receive a signal through the first feed point 12A and the second feed point 12B, and the signal can be an excitation signal or a conductive signal.

[0053] The grounding element 13 is disposed between the first arm 111A and the second arm 111B and between the first feeding point 12A and the second feeding point 12B. Figure 1 As shown, the grounding component 13 is located at the end of the first arm 111A and the second arm 111B away from the connecting member 112 , that is, the grounding component 13 , the first feeding point 12A and the second feeding point 12B are located on the same side of the antenna body 11 .

[0054] Furthermore, in this specific embodiment, the first feeding point 12A is arranged at a position where the end of the first arm 111A is close to the grounding component 13, the distance between the first feeding point 12A and the grounding component 13 is smaller than the distance between the second feeding point 12B and the grounding component 13, and the grounding component 13 does not contact the antenna body 11.

[0055] The dual-feed antenna structure 1 of the present invention is a monopole antenna structure. When the antenna body 11 receives a signal through the first feeding point 12A, the second feeding point 12B is in an open circuit state. At this time, the antenna body 11 can be regarded as a first antenna and generates a first current, and the dual-feed antenna structure 1 can generate a first radiation pattern according to the first current. When the antenna body 11 receives a signal through the second feeding point 12B, the first feeding point 12A is in an open circuit state. At this time, the antenna body 11 can be regarded as a second antenna and generates a second current, and the dual-feed antenna structure 1 can generate a second radiation pattern according to the second current. The radiation range covered by the first radiation pattern and the second radiation pattern can be used to receive external signals.

[0056] Please also read Figure 1 as well as Figure 2 . Figure 2 FIG. 1 is a diagram showing the current distribution of the dual-feed antenna structure 1 when the first feed point 12A is excited according to a specific embodiment of the present invention. The triangular arrows on the antenna body 11 and the grounding element 13 in the figure indicate the flow direction of the current. Figure 1 and Figure 2 As shown, when the first feeding point 12A is excited, the current generated by the antenna body 11 flows from the first arm 111A through the connecting member 112 and then flows to the second arm 111B.

[0057] It is worth noting that since the distance between the grounding component 13 and the first feeding point 12A is small, that is, the grounding component 13 is closer to the first arm 111A. Therefore, when the antenna body 11 generates the first current, the grounding component 13 and the first arm 111A are greatly affected by the coupling effect, so that the current of the first arm 111A moves in the direction toward the connecting member 112 (at Figure 2 ), while the current of the grounding component 13 moves in a direction away from the connecting member 112 (at Figure 2 The grounding component 13 moves downward in the figure), that is, the current directions of the first arm 111A and the grounding component 13 are opposite, resulting in electromagnetic phase cancellation between the first arm 111A and the grounding component 13, so that the area with the maximum current density of the first current is located on the connecting member 112 (as shown by the arrow in the figure).

[0058] Please also read Figure 1 as well as Figure 3 . Figure 3 FIG. 1 is a diagram showing the current distribution of the dual-feed antenna structure 1 when the second feed point 12B is excited according to a specific embodiment of the present invention. The triangular arrows on the antenna body 11 and the grounding element 13 in the figure represent the flow direction of the current. Figure 1 and Figure 3As shown, when the second feeding point 12B is excited, the current generated by the antenna body 11 flows from the second arm 111B through the connecting member 112 and then flows to the first arm 111A. Since the distance between the grounding component 13 and the second feeding point 12B is greater than the distance between the grounding component 13 and the first feeding point 12A, and the distance between the grounding component 13 and the second arm 111B is greater than the distance between the grounding component 13 and the first arm 111A. When the antenna body 11 generates the second current, the grounding component 13 and the second arm 111B are less affected by the coupling effect, so that the electromagnetic mutual cancellation degree between the second arm 111B and the grounding component 13 is small, that is, the current on the second arm 111B is less affected by the grounding component 13, and therefore, the area with the maximum current density of the second current is located on the second arm 111B (as shown by the arrow in the figure).

[0059] like Figure 1 As shown, in this specific embodiment, the first arm 111A and the second arm 111B are arranged in parallel and the connecting member 112 is perpendicularly connected to the second arm 111B, so the current direction of the first current in the area with the maximum current density and the current direction of the second current in the area with the maximum current density are perpendicular to each other. Furthermore, since the current directions of the first current and the second current in the area with the maximum current density are different, the shapes and coverage ranges of the first radiation pattern and the second radiation pattern generated by the dual-feed antenna structure 1 are also different.

[0060] Please also read Figure 1 , Figure 4 , Figure 5 and Figure 6 . Figure 4 FIG. 4 is a diagram showing the distribution of the first radiation pattern P1 and the second radiation pattern P2 on the XY plane according to a specific embodiment of the present invention. Figure 5 FIG. 4 is a diagram showing the distribution of the first radiation pattern P1 and the second radiation pattern P2 on the YZ plane according to a specific embodiment of the present invention. Figure 6 FIG. 4 is a diagram showing the distribution of the first radiation pattern P1 and the second radiation pattern P2 on the XZ plane according to a specific embodiment of the present invention. Figures 4 to 6 The field pattern distribution diagram includes a first radiation pattern P1, a second radiation pattern P2, and a total radiation pattern P3 combining the first radiation pattern P1 and the second radiation pattern P2. In this specific embodiment, the first radiation pattern P1 and the second radiation pattern P2 are complementary radiation patterns, and the antenna envelope correlation coefficient (EnvelopeCorrelation Coefficient, ECC) between the first radiation pattern and the second radiation pattern is less than 0.5, for example: 0.4, 0.3, 0.2, etc.

[0061] like Figure 4As shown, when the dual-feed antenna structure 1 excites the first feed point 12A to generate the first radiation pattern P1, the first radiation pattern P1 includes the first reception dead spot S1 and the second reception dead spot S2. When the dual-feed antenna structure 1 excites the second feed point 12B to generate the second radiation pattern P2, the radiation range of the second radiation pattern P2 can cover the first reception dead spot S1 and the second reception dead spot S2 of the first radiation pattern P1. Figure 5 As shown, when the dual-feed antenna structure 1 excites the second feed point 12B to generate the second radiation pattern P2, the second radiation pattern P2 includes a third reception dead spot S3. When the dual-feed antenna structure 1 excites the first feed point 12A to generate the first radiation pattern P1, the radiation range of the first radiation pattern P1 can cover the third reception dead spot S3 of the second radiation pattern P2. In other words, the first radiation pattern P1 and the second radiation pattern P2 can complement each other's reception dead spots to form complementary radiation patterns. Therefore, the dual-feed antenna structure of the present invention uses a single antenna structure and realizes a dual antenna effect through the excitation of dual feed points, generating two complementary radiation patterns to reduce reception dead spots, thereby improving reception quality and reducing space requirements and costs.

[0062] In addition to the aforementioned specific embodiments, the dual-feed antenna structure of the present invention may also be in other forms. In one specific embodiment, the first arm and the second arm of the antenna body may be arranged adjacent to each other at an angle (i.e., non-parallel), and the second arm and the connecting member may be arranged non-parallel. When the dual-feed antenna structure excites the first feeding point and the second feeding point respectively, the current direction of the first current in the area with the maximum current density and the current direction of the second current in the area with the maximum current density are in different axial directions (also different angular directions), thereby generating first radiation patterns and second radiation patterns of different shapes, different radiation coverage and complementary to each other.

[0063] Since the dual-feed antenna structure generates currents in two different directions through the asymmetric structure setting between the antenna body and the grounding component and the excitation of two feeding points, the dual-feed antenna structure of the present invention can generate complementary first radiation patterns and second radiation patterns in any signal frequency band, and the first radiation pattern and the second radiation pattern can be suitable for receiving external signals in any frequency band.

[0064] Please also read Figure 1 and Figure 7 . Figure 7 FIG. 1 is a functional block diagram showing a dual-feed antenna structure 1 applied to an antenna control system S according to a specific embodiment of the present invention. Figure 7As shown, the antenna control system S includes a dual-feed antenna structure 1, a control module 2 and a switch 3. The control module 2 is electrically connected to the switch 3, and the switch 3 is electrically connected to the dual-feed antenna structure 1. The control module 2 is used to send an excitation signal or a conduction signal. The switch 3 is used to selectively conduct the first feed point 12A and the second feed point 12B.

[0065] In practice, the antenna control system S can be applied to Bluetooth headsets or other signal transceiver devices. The control module 2 may include a signal generator 21 and a controller 22. The signal generator 21 is used to generate an excitation signal and / or a conductive signal, and the controller 22 is used to control the signal generator 21 to send a signal. Further, the controller 22 can also be used to control the switching of the switch 3. When the controller 22 controls the switch 3 to switch to the first feeding point 12A, the control module 2 and the first feeding point 12A are in a conductive state. At this time, the controller 22 can control and transmit the excitation signal to the first feeding point 12A, so that the dual-feed antenna structure 1 generates a first current and a first radiation pattern to receive and send signals. When the controller 22 controls the switch 3 to switch to the second feeding point 12B, the control module 2 and the second feeding point 12B are in a conductive state. At this time, the controller 22 can control and transmit the excitation signal to the second feeding point 12B, so that the dual-feed antenna structure 1 generates a second current and a second radiation pattern to receive and send signals. Therefore, the antenna control system S can selectively and alternately generate the first current and the second current by controlling the switching switch, thereby generating the complementary first radiation pattern and the second radiation pattern with different signal coverage ranges.

[0066] See also Figure 8 . Figure 8 FIG. 4 is a flowchart showing the steps of controlling a dual-feed antenna structure 1 according to a specific embodiment of the present invention. Figure 8 The steps of the process can be seen through Figure 7 This is achieved by using the antenna control system S. Figure 8 As shown, the process of the antenna control system S controlling the dual-feed antenna structure 1 includes the following steps: Step S1: Control the dual-feed antenna structure 1 to receive external signals with the first antenna; Step S2: Detect and determine whether the signal strength of the first antenna is greater than the signal strength threshold. If the judgment result is no, then execute step S3: Switch and control the dual-feed antenna structure 1 to receive external signals with the second antenna; Step S4: Detect and determine whether the signal strength of the second antenna is greater than the signal strength threshold. If the judgment result is no, then execute step S5: Switch the antenna with better signal strength to receive external signals.

[0067] In step S1 , the control module 2 of the antenna control system S may first control the switch 3 to switch to the first feeding point and transmit an excitation signal, so that the dual-feed antenna structure 1 generates a first current and a first radiation pattern to receive an external signal.

[0068] In step S2, the control module 2 may include a signal strength measurement unit (not shown) for measuring the received signal strength (RSSI) of the antenna. Further, the control module 2 may pre-store a signal strength threshold, wherein the signal strength threshold may be determined according to the design or demand. After the first antenna of the dual-feed antenna structure 1 generates a first radiation pattern, the control module 2 measures and determines whether the signal strength of the first antenna is greater than the signal strength threshold.

[0069] When the control module 2 determines that the signal is received by the first antenna, it indicates that the signal is received well. At this time, the control module 2 does not control the switch 3, and the dual-feed antenna structure 1 continues to receive external signals with the first antenna. When the control module 2 determines that the signal is received by the first antenna, it indicates that the signal is received poorly or is located in a dead spot, and then step S3 is executed.

[0070] In step S3 , the control module 2 controls the switch 3 to switch to the second feeding point and transmit an excitation signal, so that the dual-feed antenna structure 1 switches from the first antenna to the second antenna and generates a second current and a second radiation pattern to receive an external signal.

[0071] In step S4, after the second antenna of the dual-feed antenna structure 1 generates the second radiation pattern, the control module 2 again measures and determines whether the signal strength of the second antenna is greater than the signal strength threshold. Similarly, when the judgment result of the control module 2 is yes, it means that the second antenna receives the signal well. At this time, the control module 2 does not control the switching switch 3, and the dual-feed antenna structure 1 continues to receive external signals with the second antenna. When the judgment result of the control module 2 is no, it means that the second antenna receives the signal poorly, and then executes step S5.

[0072] In step S5, the control module 2 selects a better antenna according to the signal strengths of the first antenna and the second antenna measured by the signal strength measurement unit. When the signal strength of the first antenna is greater than the signal strength of the second antenna, the control module 2 controls the switching switch 3 to switch to the first feeding point again, so that the dual-feed antenna structure 1 receives the external signal with the first antenna. When the signal strength of the second antenna is greater than the signal strength of the first antenna, the control module 2 does not control the switching switch 3, and the dual-feed antenna structure 1 continues to receive the external signal with the second antenna. In addition, the control module 2 can further pre-store a detection time length. After the control module 2 selects the better antenna, the control module 2 can execute step S2 again according to the detection time length to detect and determine the signal strength of the currently selected antenna.

[0073] It is worth noting that Figure 8A specific embodiment is to first control the first antenna of the dual-feed antenna structure as the default antenna to receive external signals, but the practice is not limited to this. The antenna control system can also use the second antenna of the dual-feed antenna structure as the default antenna, or randomly select one of the antennas as the default antenna.

[0074] In summary, the dual-feed antenna structure of the present invention uses a single antenna structure and an asymmetric structure between the antenna body and the grounding element to achieve a dual antenna effect by stimulating dual feed points, thereby reducing space design requirements and material costs. In addition, the dual-feed antenna structure of the present invention alternately generates currents of different angles and two complementary radiation patterns through the stimulation of dual feed points to reduce the reception dead angle, thereby improving the reception quality.

[0075] The above detailed description of the embodiments is intended to clearly describe the features and spirit of the present invention, but is not intended to limit the present invention to the preferred embodiments disclosed above. On the contrary, the purpose is to cover various changes and arrangements with equivalents within the scope of the claims to be applied for the present invention. Therefore, the scope of the claims applied for the present invention should be interpreted in the broadest sense based on the above description so as to cover all possible changes and arrangements with equivalents.

Claims

1. A dual-feed antenna structure, comprising: An antenna body comprises a first arm, a second arm and a connecting member, wherein the first arm is disposed adjacent to the second arm, and the connecting member connects the first arm and the second arm; A first feeding point is disposed on the first arm; a second feeding point disposed on the second arm; and A grounding component, disposed between the first feeding point and the second feeding point; in, The distance between the first feeding point and the grounding component is smaller than the distance between the second feeding point and the grounding component.

2. The dual-feed antenna structure according to claim 1, characterized in that: The antenna body receives a signal through the first feeding point to generate a first current and a first radiation pattern, and the antenna body receives a signal through the second feeding point to generate a second current and a second radiation pattern, wherein the first current flows from the first arm to the second arm, the second current flows from the second arm to the first arm, and the first current and the second current exist alternately.

3. The dual-feed antenna structure according to claim 2, characterized in that: The current direction of the first current in the area with the maximum current density and the current direction of the second current in the area with the maximum current density are in different axis directions.

4. The dual-feed antenna structure according to claim 3, characterized in that: The area with the maximum current density of the first current is located on the connecting member.

5. The dual-feed antenna structure according to claim 3, characterized in that: The area with the maximum current density of the second current is located on the second arm.

6. The dual-feed antenna structure according to claim 1, characterized in that: The size of the first arm is greater than the size of the second arm.

7. The dual-feed antenna structure according to claim 1, characterized in that: The first arm and the second arm are arranged in parallel.

8. The dual-feed antenna structure according to claim 7, characterized in that: The current direction of the first current in the area with the highest current density and the current direction of the second current in the area with the highest current density are perpendicular to each other.

9. The dual-feed antenna structure according to claim 2, characterized in that: An antenna envelope correlation coefficient (Envelope Correlation Coefficient, ECC) between the first radiation pattern and the second radiation pattern is less than 0.

5.

10. The dual-feed antenna structure according to claim 2, characterized in that: The first radiation pattern and the second radiation pattern are complementary radiation patterns.

11. The dual-feed antenna structure according to claim 1, characterized in that: The first feeding point is arranged at the end of the first arm away from the connecting member, and the second feeding point is arranged at the end of the second arm away from the connecting member.

12. The dual-feed antenna structure according to claim 11, characterized in that: The first feeding point is arranged at a position where the end of the first arm is close to the grounding component.

13. The dual-feed antenna structure according to claim 1, characterized in that: The antenna body is in a C-shape.

14. The dual-feed antenna structure according to claim 1, characterized in that: The grounding component does not contact the antenna body.

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