Cavity antenna and electronic equipment

Abstract

The utility model provides a cavity antenna and electronic equipment. The cavity antenna comprises an antenna support and an antenna circuit board, and the antenna circuit board covers the antenna support to form an antenna cavity. The antenna circuit board is provided with a feed connection position and a grounding connection position, and a feed sensitive area is formed on the antenna circuit board after the feed connection position is conducted with the feed circuit. A notch is formed in the corner, located in the feed sensitive area, of the antenna circuit board, and the grounding connection position is arranged on a first edge formed by the notch so that the grounding connection position can be located in the feed sensitive area. As the antenna circuit board is provided with the feed connection position and the grounding connection position, a feed sensitive area is formed on the antenna circuit board after the feed connection position is conducted with the feed circuit. The antenna circuit board of the cavity antenna is provided with the gap at the corner in the feed sensitive area, so that the grounding connection position at the first edge of the gap returns to the ground in the feed sensitive area, and the antenna performance can be improved.

Description

Technical Field

[0001] This disclosure relates to the field of antenna technology, and in particular to cavity antennas and electronic devices. Background Technology

[0002] A cavity antenna is a type of antenna that uses a closed / semi-closed cavity structure made of metal or conductive materials to achieve electromagnetic wave resonance and radiation. The cavity structure can concentrate electromagnetic field energy and improve radiation efficiency. In electronic devices, cavity antennas typically rely on the metal-free area of ​​the screen bezel for radiation. However, as display and aesthetic requirements become increasingly stringent, antennas need better performance to meet the challenge of narrow screen bezels. Utility Model Content

[0003] This disclosure provides a cavity antenna and electronic device to solve related technical problems.

[0004] According to a first aspect of this disclosure, a cavity antenna is provided, comprising: an antenna support and an antenna circuit board; the antenna circuit board covers the antenna support to form an antenna cavity;

[0005] The antenna circuit board is provided with a power supply connection position and a ground connection position. After the power supply connection position is connected to the power supply line, a power supply sensitive area is formed on the antenna circuit board.

[0006] The antenna circuit board has a notch at the corner within the power-sensitive area, and the ground connection is located at the first edge of the notch so that the ground connection is located within the power-sensitive area.

[0007] Optionally, the antenna circuit board includes a first side, the first side includes an edge position, the edge position is close to the motherboard of the electronic device, and the power supply connection position is disposed at the edge position.

[0008] Optionally, the edge location includes a first end near the motherboard, the distance from the first end to the power supply connection point being less than or equal to one-quarter of the length of the first side.

[0009] Optionally, the edge location includes a flange structure, and the power supply connection position is disposed on the flange structure.

[0010] Optionally, the antenna circuit board includes a second side near the motherboard; the cavity antenna also includes a signal line extending from the antenna cavity perpendicular to the second side.

[0011] Optionally, the signal line includes a grounding portion located outside the antenna cavity, and the motherboard has a grounding point located near the cavity antenna; the grounding portion is electrically connected to the grounding point.

[0012] Optionally, the antenna bracket has a snap-fit ​​structure in the middle area; the snap-fit ​​structure is snapped and fixed to the snap-fit ​​part of the electronic device frame structure to provide pressure to the cavity antenna toward the frame structure.

[0013] Optionally, the antenna circuit board includes a second side and a third side, and the notch is provided at the corner formed by the second side and the third side; the first connection position of the first edge and the second side and the second connection position of the first edge and the third side are respectively provided with clearance openings.

[0014] Optionally, the first distance from the first connection point to the third side is equal to the length of the second side, and the second distance from the second connection point to the second side is equal to half the length of the third side.

[0015] According to a second aspect of this disclosure, an electronic device is provided, the electronic device including any of the cavity antennas described in the first aspect.

[0016] The technical solution provided in this disclosure can achieve at least the following beneficial effects:

[0017] The antenna circuit board disclosed herein has a feed connection point and a ground connection point. After the feed connection point is connected to the feed line, a feed sensitive area is formed on the antenna circuit board. The antenna circuit board of the cavity antenna has a notch at the corner within the feed sensitive area, so that the ground connection point located at the first edge of the notch returns to ground within the feed sensitive area, which helps to improve antenna performance.

[0018] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this specification. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this specification and, together with the description, serve to explain the principles of this specification.

[0020] Figure 1 This is a schematic diagram of the structure of a cavity antenna according to an exemplary embodiment of the present disclosure;

[0021] Figure 2 This is a schematic diagram of the structure of an antenna support according to an exemplary embodiment of the present disclosure;

[0022] Figure 3 This is a partial structural schematic diagram of an electronic device according to an exemplary embodiment of the present disclosure;

[0023] Figure 4 This is a schematic diagram of the structure of an electronic device motherboard according to an exemplary embodiment of the present disclosure.

[0024] Figure label:

[0025] Cavity antenna 1; Antenna bracket 11; Clip-on structure 111; Antenna circuit board 12; Notch 121; First edge 1211; First side 122; Second side 123; Third side 124; Clearance opening 125; Feed connection position 126; Ground connection position 127;

[0026] Electronic device 2; motherboard 21; terminal 211. Detailed Implementation

[0027] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0028] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movements between components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0029] A cavity antenna is a type of antenna that uses a closed / semi-closed cavity structure made of metal or conductive materials to achieve electromagnetic wave resonance and radiation. The cavity structure can concentrate electromagnetic field energy and improve radiation efficiency. In electronic devices, cavity antennas typically rely on the metal-free area of ​​the screen bezel for radiation. However, as display and aesthetic requirements become increasingly stringent, antennas need better performance to meet the challenge of narrow screen bezels.

[0030] This disclosure provides a cavity antenna. Figure 1 This is a schematic diagram of the structure of a cavity antenna according to an exemplary embodiment of this disclosure, as shown below. Figure 1 As shown, the cavity antenna 1 includes an antenna support 11 and an antenna circuit board 12. The antenna circuit board 12 covers the antenna support 11 to form an antenna cavity. The antenna circuit board 12 is provided with a feed connection position 126 and a ground connection position 127. After the feed connection position 126 is connected to the feed line, a feed sensitive area is formed in the antenna circuit board 12. The antenna circuit board 12 has a notch 121 at the corner located in the feed sensitive area. The ground connection position 127 is located at the first edge 1211 formed by the notch 121, so that the ground connection position 127 is located in the feed sensitive area.

[0031] In the above embodiment, the antenna circuit board 12 is provided with a feed connection position 126 and a ground connection position 127. After the feed connection position 126 is connected to the feed line, a feed sensitive area is formed in the antenna circuit board 12. The antenna circuit board 12 of the cavity antenna 1 has a notch 121 at the corner in the feed sensitive area, so that the ground connection position 127 located at the first edge 1211 of the notch 121 returns to ground in the feed sensitive area, which helps to improve the antenna performance and requires little modification to the original cavity antenna 1 and electronic equipment 2 structure, thus reducing the improvement cost.

[0032] For example Figure 1 As shown, by taking advantage of the current distribution characteristics of cavity antenna 1, a chamfer is made at the lower left corner of the feed connection position 126 of cavity antenna 1, and the cavity sensitive point is grounded, which improves the performance of the antenna by 0.6dB.

[0033] In some embodiments, the antenna circuit board 12 includes a first side 122, which has an edge position close to the main board 21, and a feed connection 126 is disposed at the edge position. Distributing the feed connection 126 at the edge position helps optimize the range of the feed-sensitive area, allowing the ground connection 127 to return to ground within the feed-sensitive area, thus improving antenna performance.

[0034] The edge position may include a first end near the main board 21, and the distance from the first end to the feed connection 126 is less than or equal to one-quarter of the length of the first side 122. By limiting the distance between the feed connection 126 and the first end to less than or equal to one-quarter of the length of the first side 122, interference between the feed connection 126 and other antenna structures is avoided, and the distance between the feed connection 126 and the corner located in the feed sensitive area is reduced. This helps to optimize the structure of the notch 121 formed at the aforementioned corner and the position of the ground connection 127.

[0035] For example, changing the distance between the antenna feed connection 126 and the first end from one-third of the length of the first side 122 to less than or equal to one-quarter of the length of the first side 122 can improve performance by 0.3dB.

[0036] In the above embodiment, the edge position includes a flange structure, and the power supply connection position 126 is disposed on the flange structure. The power supply line connection is realized through the flange structure, which improves the connection reliability and convenience.

[0037] In some embodiments, such as Figures 1-3As shown, the antenna circuit board 12 includes a second side 123 near the main board 21, and the cavity antenna 1 also includes a signal line 13, which extends from the antenna cavity perpendicularly to the second side 123. The signal line 13 extending perpendicularly to the second side 123 avoids mutual coupling with the screen and battery frame during the bending and coiling process of the signal line 13 back to ground, thus preventing reduced antenna efficiency.

[0038] The signal line 13 may include a grounding part located outside the antenna cavity. The motherboard 21 is provided with a grounding point 211 near the cavity antenna 1. The grounding part and the grounding point 211 are electrically connected to facilitate the grounding connection between the signal line 13 and the motherboard 21, thereby reducing the structural and space occupation caused by the grounding of the signal line 13.

[0039] In some embodiments, such as Figure 4 As shown, the middle area of ​​the antenna bracket 11 may be provided with a snap-fit ​​structure 111, which snaps and fixes itself to the frame structure of the electronic device 2 to provide pressure to the cavity antenna 1 towards the frame structure. The snap-fit ​​structure 111 can increase the downward pressure in the middle area of ​​the cavity antenna 1 by snapping with the frame structure, thereby improving the sealing effect of the cavity antenna 1. The frame structure may be made of plastic, and its position may be at the center of the middle area of ​​the antenna bracket 11 or off-center; this disclosure does not impose any limitations on this. For example, the frame structure may be offset from the center towards the side closer to the motherboard 21 to improve the sealing effect of the corresponding area, thereby improving the actual performance by 0.5 dB.

[0040] In some embodiments, the antenna circuit board 12 includes a second side 123 and a third side 124. A notch 121 is provided at the corner formed by the second side 123 and the third side 124. Clearance openings 125 are provided at the first connection point of the first edge 1211 and the second side 123, and at the second connection point of the first edge 1211 and the third side 124, respectively. These clearance openings 125 can be used to avoid the connectors of the fixed antenna bracket 11, which is fixedly assembled to the mid-frame or other components of the electronic device 2 via connectors. For example, the connectors can be threaded connectors. By shifting the clearance opening 125 from the corner position to the first and second connection points through the notch 121, the sealing failure problem caused by the clearance opening 125 in the corner area is also avoided.

[0041] The first distance from the first connection point to the third side 124 can be equal to the length of the second side 123, and the second distance from the second connection point to the second side 123 can be equal to half the length of the third side 124. This is to optimize the size of the notch 121, so that the ground connection point 127 is located within the feed-sensitive area, thereby improving antenna performance. In other embodiments, the specific values ​​of the first and second distances can be adjusted according to the structural layout of the cavity antenna and the position of the avoidance opening 125, and this disclosure does not impose any limitations on this.

[0042] It should be noted that the antenna performance of the cavity antenna 1 with a radiating aperture of 1.7mm using the above measures is still better than that of the cavity antenna 1 with a radiating aperture of 3.5mm without the above embodiment. Therefore, when the cavity antenna 1 needs to radiate through the metal-free area of ​​the screen bezel in the electronic device 2, using the cavity antenna 1 in the above embodiment can reduce the width requirement of the metal-free area of ​​the screen, thereby improving the screen display effect and aesthetic appearance of the electronic device 2.

[0043] This disclosure further provides an electronic device 2, which includes the cavity antenna 1 described above.

[0044] Since the antenna circuit board 12 of the cavity antenna 1 is provided with a feed connection position 126 and a ground connection position 127, the feed connection position 126 forms a feed sensitive area in the antenna circuit board 12 after being connected to the feed line. The antenna circuit board 12 of the cavity antenna 1 has a notch 121 at the corner in the feed sensitive area, so that the ground connection position 127 located at the first edge 1211 of the notch 121 returns to ground in the feed sensitive area, which helps to improve antenna performance, and the structural changes to the original cavity antenna 1 and electronic equipment 2 are small, reducing the improvement cost.

[0045] The aforementioned electronic device 2 may be a mobile phone, tablet computer, vehicle terminal, medical terminal, etc., and this disclosure does not impose any restrictions on it.

[0046] It should be noted that the technical solutions or features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A cavity antenna, characterized by, The cavity antenna (1) comprises: an antenna support (11) and an antenna circuit board (12); the antenna circuit board (12) covers the antenna support (11) to form an antenna cavity; the antenna circuit board (12) is provided with a feed connection position (126) and a ground connection position (127); the feed connection position (126) forms a feed sensitive area on the antenna circuit board (12) after being connected with a feed circuit; a corner of the antenna circuit board (12) located in the feed sensitive area is provided with a notch (121); the ground connection position (127) is arranged on a first edge (1211) formed by the notch (121), so that the ground connection position (127) is located in the feed sensitive area.

2. The cavity antenna of claim 1, wherein, The antenna circuit board (12) comprises a first side edge (122), and the first side edge (122) comprises an edge position close to a mainboard (21) of an electronic device; the feed connection position (126) is arranged at the edge position.

3. The cavity antenna of claim 2, wherein, The edge position comprises a first end close to the mainboard (21), and a distance from the first end to the feed connection position (126) is less than or equal to one fourth of a length of the first side edge (122).

4. The cavity antenna of claim 2, wherein, The edge position comprises a turn-up structure, and the feed connection position (126) is arranged at the turn-up structure.

5. The cavity antenna of claim 1, wherein, The antenna circuit board (12) comprises a second side edge (123) close to the mainboard (21); the cavity antenna (1) further comprises a signal line (13) extending perpendicularly to the second side edge (123) from the antenna cavity.

6. The cavity antenna of claim 5, wherein, The signal line (13) comprises a ground part located outside the antenna cavity; the mainboard (21) is provided with a ground position (211) at a position close to the cavity antenna (1); and the ground part is electrically connected with the ground position (211).

7. The cavity antenna of claim 1, wherein, A buckle structure (111) is arranged at a middle region of the antenna support (11); the buckle structure (111) is buckled and fixed with a clamping part of a middle frame structure of an electronic device (2) to provide a pressure of the cavity antenna (1) towards the middle frame structure.

8. The cavity antenna of claim 1, wherein, The antenna circuit board (12) comprises a second side edge (123) and a third side edge (124); a corner formed by the second side edge (123) and the third side edge (124) is provided with the notch (121); a first edge (1211) and a first connection position of the second side edge (123) and a second connection position of the first edge (1211) and the third side edge (124) are respectively provided with an avoiding opening (125).

9. The cavity antenna of claim 8, wherein, A first distance from the first connection position to the third side edge (124) is equal to a length of the second side edge (123); and a second distance from the second connection position to the second side edge (123) is equal to one half of a length of the third side edge (124).

10. An electronic device, comprising: The cavity antenna (1) comprises any one of claims 1-9.

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