Antenna grounding seat, antenna device and electronic device

Abstract

The present application discloses an antenna grounding seat, an antenna device and an electronic device. The antenna grounding seat is provided with: a radiation cavity, a radiation outlet and a polygonal annular groove. The radiation cavity is located in the antenna grounding seat and there is an antenna signal in the radiation cavity, and the antenna signal radiates outward from the radiation outlet. The polygonal annular groove is arranged around the radiation outlet to correct the depression caused by the main lobe in the antenna radiation pattern. In the above manner, the present application can improve the aperture of the antenna, optimize the surface current at the edge of the radiation outlet, correct the depression of the radiation main lobe, and at the same time increase the lobe width of the radiation field, so that the antenna has a larger radiation range, and the present application has a simple structure and strong reliability.

Description

Technical Field

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

[0002] The horn antenna is a system commonly used to generate electromagnetic radiation in the millimeter wave frequency band. It is widely used due to its low price, simple structure and strong practicality.

[0003] However, when an ordinary horn antenna works in the main excitation state, there is a longitudinal current on the inner wall surface of its radiation cavity. Most of the longitudinal surface current is closed in space to form the main radiation field; but a small part of the longitudinal surface current forms a scattering at the edge of the radiation aperture, causing the main radiation lobe to be concave, the antenna's lobe width is narrow, and the radiation field pattern is easily distorted. Summary of the invention

[0004] The main technical problem solved by the present application is to provide an antenna grounding base to correct the depression of the main lobe of the antenna radiation.

[0005] In order to solve the above technical problems, a technical solution adopted by the present application is to provide an antenna grounding seat, including:

[0006] A radiation cavity, the radiation cavity is located in the antenna grounding seat, and the radiation cavity is used to transmit antenna signals outward;

[0007] A radiation outlet, the radiation outlet is located at one end of the radiation cavity and exposed to a side surface of the antenna grounding seat, the radiation outlet is connected to the radiation cavity, and the antenna signal can be radiated outward from the radiation outlet;

[0008] A polygonal annular groove is located on the surface of the grounding seat and surrounds the radiation outlet.

[0009] In order to solve the above technical problems, another technical solution adopted by the present application is to provide an antenna device, comprising:

[0010] The antenna grounding base provided in this application;

[0011] A feeding system, wherein the feeding system is coupled to the radiation cavity, and the feeding system can excite the radiation cavity to generate the antenna signal;

[0012] A base is connected to an end of the radiation cavity away from the radiation outlet, and the base is used to prevent leakage of the antenna signal.

[0013] In order to solve the above technical problems, another technical solution adopted by the present application is to provide an electronic device, comprising:

[0014] A communication circuit and an antenna device provided in the present application, wherein the communication circuit is coupled to the antenna device.

[0015] The beneficial effects of the present application are: different from the prior art, the present application provides a polygonal annular groove around the radiation outlet of the antenna to improve the aperture of the antenna, so that the surface current at the edge of the radiation outlet is optimized, the radiated signal has a relatively consistent phase, the depression of the radiation main lobe is corrected, and the lobe width of the radiation field is increased, so that the antenna has a larger radiation range. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a structural diagram of an embodiment of the electronic device of the present application;

[0017] Figure 2 This is a front view of an embodiment of the antenna device of the present application;

[0018] Figure 3 is a perspective front view of an embodiment of the antenna device of the present application;

[0019] Figure 4 is a cross-sectional view of an embodiment of the antenna device of the present application;

[0020] Figure 5 It is a front view of a radiation outlet of an embodiment of the antenna device or antenna grounding base of the present application;

[0021] Figure 6 is the antenna main lobe pattern of the existing horn antenna;

[0022] Figure 7 It is the main lobe pattern of the antenna with circular ring slots;

[0023] Figure 8 is the main lobe pattern of the antenna of one embodiment of the antenna device of the present application;

[0024] Fig. 9 It is a front view of a radiation outlet of another embodiment of the antenna device or antenna grounding base of the present application.

[0025] Figure numerals: 100 electronic device, 100a communication circuit, 100b antenna device, 10 antenna grounding seat, 11 polygonal ring groove, 11a rectangular ring groove, 11b, 11c other ring grooves, 12 radiation cavity, 13 radiation outlet, 14 feeding system, 14a feeding board, 14b feeding transmission line, 15 base, d polygonal ring groove depth, L1 rectangular ring groove outer circumference, W1 rectangular ring groove outer circumference width; L2 rectangular ring groove inner circumference, W2 rectangular ring groove inner circumference width, L3 radiation outlet length, W3 radiation outlet width. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0027] The electronic device 100 provided in the present application may be a mobile phone terminal, a smart wearable device or a radar device, and the smart wearable device is, for example, a smart watch.

[0028] See also Figure 1 The electronic device 100 provided in the present application includes a communication circuit 100a and an antenna device 100b. The communication circuit 100a is coupled to the antenna device 100b, and the communication circuit 100a can communicate with the outside through the antenna device 100b.

[0029] The electronic device 100 provided in the present application is equipped with the antenna device 100b provided in the present application, and has a larger and farther signal coverage range.

[0030] like Figure 2 , Figure 3 As shown, Figure 2 , Figure 3 The antenna device 100b provided in the present application is an embodiment, and the antenna device 100b embodiment may include an antenna grounding base 10, a feeding system 14, and a base 15. The feeding system 14 is disposed in the antenna grounding base 10, and the base 15 is connected to the bottom of the antenna grounding base 10.

[0031] The antenna grounding base 10 is provided with a polygonal annular groove 11 , a radiation cavity 12 and a radiation outlet 13 . The polygonal annular groove 11 may be a rectangular groove, a hexagonal groove or an octagonal groove.

[0032] The radiation cavity 12 is located inside the antenna grounding base 10, and there is an antenna signal in the radiation cavity 12. The radiation cavity 12 is arranged in the antenna grounding base 10 for conduction, and the conduction port of the radiation cavity 12 is a radiation outlet 13, and the radiation outlet 13 is located on the surface of one side of the antenna grounding base 10. The antenna signal radiated in the radiation cavity 12 can be radiated outward from the radiation outlet 13, so as to achieve the effect that the antenna grounding base 10 radiates the antenna signal outward.

[0033] Specifically, in some embodiments, the antenna signal exists in the form of millimeter waves, and the frequency band of the antenna signal may be the N260 frequency band, ie, 37-40 GHz.

[0034] The polygonal annular groove 11 is located on a side surface of the antenna grounding seat 10 , which is the same surface as the radiation outlet 13 , and the polygonal annular groove 11 is disposed around the radiation outlet 13 .

[0035] The inner ring edge and the outer ring edge of the polygonal annular groove 11 provided in the present application are parallel structures. Ordinary technicians in this field can also set the inner ring edge and the outer ring edge to be non-parallel structures according to the principles of the present application.

[0036] The feeding system 14 is disposed in the antenna grounding base 10, and the feeding system 14 supplies signals and energy to the radiation cavity 12. The feeding system 14 is coupled to the radiation cavity 12, and the feeding system 14 can excite the radiation cavity 12 to generate antenna signals.

[0037] Specifically, see Figure 3 , 4 The feeding system 14 may include a feeding board 14a and a feeding transmission line 14b, wherein the feeding board 14a is disposed in the antenna grounding base 10, and the feeding transmission line 14b is disposed in the feeding board 14a. The feeding transmission line 14b is coupled with the radiation cavity 12 in the antenna grounding base 10 to excite the radiation cavity 12 to generate an antenna signal. The feeding transmission line 14b is not in direct contact with the radiation cavity 12, and the feeding board 14a is used to provide a coupling space for the feeding transmission line 14b.

[0038] See also Figure 3 , 4 A base 15 is provided at the other end of the radiation cavity 12 located at the conducting port of the antenna grounding seat 10. The antenna base 15 can prevent the antenna signal in the radiation cavity 12 from leaking from the direction of the antenna base 15. The antenna signal can only radiate outward from the radiation outlet 13.

[0039] Optionally, in some embodiments, the antenna ground seat 10 and the base 15 are made of metal, such as aluminum.

[0040] See also Figure 4 , Figure 4 This is a cross-sectional view of an antenna device 100b according to an embodiment of the present application, and the depth of the polygonal annular groove 11 is d. Assuming that the wavelength of the antenna signal in the radiation cavity 12 is λ, the depth d of the polygonal annular groove 11 is 0.4λ-0.6λ, and can be 0.45λ, 0.5λ, or 0.55λ, etc.

[0041] The polygonal annular groove 11 in the embodiment provided in the present application has the same inner and outer edge heights, but this does not mean that the present application is limited to the same inner and outer edge heights. Those skilled in the art can set the polygonal annular groove 11 to a structure with unequal inner and outer edge heights according to the principle of the present application.

[0042] Specifically, in some embodiments, the depth d of the polygonal annular groove 11 is 3.1 mm-4.7 mm, and can be 3.5 mm, 3.9 mm or 4.3 mm.

[0043] Optionally, in some embodiments, the polygonal annular groove 11 is as follows Figure 5 The rectangular annular groove 11a is shown.

[0044] See also Figure 5 , Figure 5 It is a front view of one side of the antenna grounding base 10 where the radiation outlet 13 is located. Figure 5 The polygonal annular groove is a rectangular annular groove 11a, which is arranged around the radiation outlet 13. The radiation outlet 13 is located at the center of the rectangular annular groove 11a, wherein the outer circumference of the rectangular annular groove 11a is L1 and the width is W1; the inner circumference is L2 and the width is W2; the radiation outlet 13 is a rectangle, and the length of the radiation outlet is L3 and the width is W3.

[0045] Optionally, assuming that the wavelength of the antenna signal in the radiation cavity 12 is λ, the outer circumference L1 of the rectangular annular groove 11a is 2.3λ-2.7λ, which can be 2.4λ, 2.56λ or 2.6λ; the outer circumference width W1 is 1.5λ-1.8λ, which can be 1.6λ, 1.66λ or 1.7λ.

[0046] Optionally, the inner circumference L2 of the rectangular annular groove 11a is 1.0λ-1.3λ, and can be 1.1λ, 1.15λ or 1.2λ; the inner circumference width W2 is 1.1λ-1.4λ, and can be 1.2λ, 1.28λ or 1.35λ.

[0047] Optionally, the length L3 of the radiation outlet 13 is 0.55λ, and the width W3 is 0.25λ.

[0048] Specifically, in some embodiments, the outer circumference L1 of the rectangular annular groove 11a is 18.0mm-21.1mm, which can be 18.8mm, 20mm or 20.3mm; the outer circumference width W1 is 11.7mm-14.0mm, which can be 12.5mm, 13mm or 13.2mm. The inner circumference L2 of the rectangular annular groove 11a is 7.8mm-10.1mm, which can be 8.6mm, 9mm or 9.4mm; the inner circumference width W2 is 8.6mm-10.9mm, which can be 9.4mm, 10mm or 10.5mm. The radiation outlet 13 has a length L3 of 4.3mm and a width W3 of 1.85mm.

[0049] The parameters provided in this application are only optional solutions for the polygonal annular groove 11 under the signal of the millimeter wave frequency band. Ordinary technicians in this field can calculate and modify the parameters of the polygonal annular groove 11 without creative work to obtain parameters adapted to other bands.

[0050] When the radiation cavity 12 can obtain energy from the feeding transmission line 14b to generate antenna signals, the radiation outlet 13 radiates the antenna signals outward. At this time, longitudinal surface currents are distributed on the surfaces of the radiation cavity 12 and the radiation outlet 13 working in the main mode excitation state. Most of the longitudinal surface currents are closed in space with the displacement currents between the corresponding pairs of walls to form a main radiation field.

[0051] Antenna lobe refers to the collective name of several maximum radiation areas in the antenna pattern. The antenna pattern is composed of one or more lobes. The lobe in the direction where the antenna radiates the strongest is called the main lobe, and the rest are called side lobes. The angle width formed by the point 3dB below the peak of the main lobe in the antenna pattern is the lobe width.

[0052] See also Figure 6 , Figure 6 This is the main lobe pattern of the existing horn antenna without the polygonal annular groove 11. If the polygonal annular groove 11 is not provided around the radiation outlet 13 of the antenna grounding base 10, a small part of the longitudinal surface current will form diffraction at the edge of the radiation outlet 13, and a small part of the antenna signal will deviate from the radiation direction. Therefore, the main lobe of the antenna lobe will have a certain depression at this time, and the ideal antenna radiation field pattern cannot be obtained.

[0053] See also Figure 7 , Figure 7 The main lobe pattern of the antenna is arranged under a circular groove around the radiation outlet 13 of the antenna grounding base 10. Although the lobe width of the antenna does not produce obvious defects at this time, the lobe width of the antenna is about 31° (-15°—+16°), which is too small to achieve good coverage.

[0054] In the present application, a polygonal annular groove 11 is arranged around the radiation outlet 13 of the antenna grounding seat 10. The diffraction wave generated by the longitudinal surface current on the edge of the radiation outlet 13 falls into the polygonal annular groove 11. The wave falling into the polygonal annular groove 11 is reflected by the polygonal annular groove 11 and can have the same phase as the normal wave emitted by the radiation cavity 12. Therefore, the main lobe depression of the antenna lobe is corrected at this time.

[0055] See also Figure 8 , Figure 8 The antenna main lobe pattern of an embodiment of the antenna device 100b of the present application shows that when the polygonal annular groove 11 is arranged around the radiation outlet 13 of the antenna grounding base 10, the main lobe depression of the antenna lobe disappears, and the antenna radiation pattern is corrected; and the lobe width of the antenna lobe when the main lobe is 3dB exceeds 100° (-57°—+60°), and the antenna device 100b has a larger radiation coverage. Compared with the prior art, the antenna device 100b provided by the present application does not produce a main lobe depression, and at the same time expands the radiation coverage.

[0056] The present application also provides an antenna grounding seat 10, which is provided with a radiation cavity 12, a radiation outlet 13 and a polygonal annular groove 11. The polygonal annular groove 11 can be a rectangular groove, a hexagonal groove or an octagonal groove.

[0057] The radiation cavity 12 is conductively disposed in the antenna grounding seat 10, and the radiation outlet 13 is located at one end of the radiation cavity 12 and exposed to a side surface of the antenna grounding seat 10, and the radiation outlet 13 is connected to the radiation cavity 12. There is an antenna signal in the radiation cavity 12, and the antenna signal can be radiated outward from the radiation outlet 13. The polygonal annular groove 11 is located on the surface of the antenna grounding seat 10 and surrounds the radiation outlet 13.

[0058] The antenna grounding base 10 is the antenna grounding base 10 used in the above antenna device 100b. The antenna grounding base 10 can be used to provide a radiation cavity 12 for the antenna device 100b, and to correct the radiation outlet 13 so that part of the radiation wave radiates signals outward with substantially the same phase.

[0059] See also Fig. 9 , Fig. 9 In another embodiment of the antenna grounding base of the present application, there are two or more polygonal annular grooves 11. A person skilled in the art can add one or more other polygonal annular grooves 11b, 11c around the radiation outlet 13 according to the solution provided in the present application. Any antenna device or antenna grounding base that uses the polygonal annular groove 11 provided in the same or similar manner as the present application for the purpose of correcting the radiation field distortion falls within the protection scope of the present application.

[0060] The above descriptions are merely embodiments of the present application and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. An antenna grounding base, characterized in that: Features: A radiation cavity, the radiation cavity is located in the antenna grounding seat, and the radiation cavity is used to transmit antenna signals outward; A radiation outlet, the radiation outlet is located at one end of the radiation cavity and exposed to a side surface of the antenna grounding seat, the radiation outlet is connected to the radiation cavity, and the antenna signal can be radiated outward from the radiation outlet; A polygonal annular groove, wherein the polygonal annular groove is located on the surface of the grounding seat and surrounds the radiation outlet. The polygonal annular groove is a rectangular annular groove, and the radiation outlet is located at the center of the rectangular annular groove. The outer circumference of the rectangular annular groove is 2.3λ-2.7λ, the outer circumference width is 1.5λ-1.8λ, and the depth of the rectangular annular groove is 0.4λ-0.6λ.

2. The antenna grounding socket according to claim 1, characterized in that: The radiation outlet is rectangular, and the length of the radiation outlet is 0.5λ-0.6λ of the antenna signal wavelength λ, and the width of the radiation outlet is 0.2λ-0.3λ.

3. The antenna grounding socket according to claim 2, characterized in that: The length of the radiation outlet is 0.55λ of the antenna signal wavelength λ, and the width is 0.25λ.

4. The antenna grounding socket according to claim 1, characterized in that: The outer circumference of the rectangular annular groove is 2.56λ, the outer circumference width is 1.66λ, and the depth of the rectangular annular groove is 0.5λ.

5. The antenna grounding socket according to claim 1, characterized in that: The inner circumference of the rectangular annular groove is 1.0λ-1.3λ, and the inner circumference width is 1.1λ-1.4λ.

6. The antenna grounding socket according to claim 1, characterized in that: The frequency range of the antenna signal is 37-40 GHz.

7. An antenna device, characterized in that: include: An antenna grounding socket, wherein the grounding socket is the antenna grounding socket as claimed in any one of claims 1 to 6; A feeding system, wherein the feeding system is coupled to the radiation cavity, and the feeding system can excite the radiation cavity to generate the antenna signal; A base is connected to an end of the radiation cavity away from the radiation outlet, and the base is used to prevent leakage of the antenna signal.

8. An electronic device, characterized in that: include: A communication circuit and the antenna device as claimed in claim 7, wherein the communication circuit is coupled to the antenna device.

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