Dual-polarization high-gain base station antenna

Abstract

The invention provides a dual-polarization high-gain base station antenna which comprises an antenna supporting floor, a feed support vertically arranged on the antenna supporting floor, an antenna radiation plate arranged on the feed support and a signal resonance plate arranged above the antenna radiation plate in a suspended mode. The plate surfaces of the antenna supporting floor, the antenna radiation plate and the signal resonance plate are parallel; a Jerusalem type metasurface structure is arranged on the outward surface of the signal resonant plate, a circular patch metasurface structure is arranged on the inward surface of the signal resonant plate, and a Fabry-Perot resonant cavity is formed between the Jerusalem type metasurface structure and the circular patch metasurface structure. The base station antenna disclosed by the invention is integrated with the Fabry-Perot resonant cavity structure, and signals emitted by the antenna radiation plate can be reflected and transmitted when passing through the resonant cavity, so that the signals generate a superimposed effect, and the effect of antenna gain is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of antennas, and in particular to a dual-polarization high-gain base station antenna. Background Art

[0002] With the continuous development of current communication technology, 5G base stations have gradually become popular, which has gradually promoted the use of base station antennas into people's daily lives. The main function of base station antennas is to send and receive wireless signals. This means that base station antennas play a vital role in mobile communication systems. They are responsible for transmitting wireless signals to user devices (such as mobile phones) or receiving signals from user devices, covering and connecting signals to the area. At the same time, with the updating and iteration of technology, base station antennas have more technical potential to better meet the growing demand. Most of the existing base station antennas use traditional antenna structure design, which is limited in the gain performance and bandwidth of the antenna. To obtain better gain and bandwidth, the antenna needs to be made larger, which will undoubtedly increase the cost of the antenna and is not conducive to the miniaturization and popularization of base station antennas.

[0003] Therefore, the prior art still needs to be improved and developed. Summary of the invention

[0004] The present invention provides a dual-polarization high-gain base station antenna, aiming to solve the technical problems mentioned in the background technology existing in the prior art base station antenna.

[0005] The technical solution of the present invention is as follows:

[0006] A dual-polarization high-gain base station antenna, comprising an antenna support floor, a feeding bracket vertically arranged on the antenna support floor, an antenna radiation plate arranged on the feeding bracket, and a signal resonance plate suspended above the antenna radiation plate, wherein the antenna support floor, the antenna radiation plate and the signal resonance plate are parallel to each other;

[0007] The signal resonance plate is provided with a Jerusalem-type metasurface structure facing outward, and a circular patch metasurface structure is provided with an inner surface of the signal resonance plate. A Fabry-Perot resonant cavity is formed between the Jerusalem-type metasurface structure and the circular patch metasurface structure.

[0008] In some optional embodiments of the present invention, the Jerusalem-type metasurface structure includes a cross-shaped metasurface unit and square array metasurface units distributed in four quadrants of the cross-shaped metasurface unit; the circular patch metasurface structure includes a circular array metasurface unit; the square patches of the square array metasurface unit correspond one-to-one to the circular patches of the circular array metasurface unit.

[0009] In some optional embodiments of the present invention, a four-leaf clover-shaped radiating antenna is arranged on the side of the antenna radiating plate facing the signal resonance plate, and the four-leaf clover-shaped radiating antenna includes a first electric dipole, a second electric dipole, a third electric dipole and a fourth electric dipole, wherein the first electric dipole and the fourth electric dipole are diagonally arranged, and the second electric dipole and the third electric dipole are diagonally arranged.

[0010] In some optional embodiments of the present invention, the feeding bracket includes a first supporting plate and a second supporting plate arranged crosswise;

[0011] The first supporting plate comprises a first feeding surface and a first coupling surface which are arranged opposite to each other, a first coupling patch and a second coupling patch are arranged on both sides of a cross position of the first coupling surface, a first end of the first coupling patch passes through the antenna radiation plate and is electrically connected to the first electric dipole, a first end of the second coupling patch passes through the antenna radiation plate and is electrically connected to the fourth electric dipole, an inverted L-shaped first feeding branch is arranged on the first feeding surface, a vertical arm of the first feeding branch is coupled to the first coupling patch, and a horizontal arm of the first feeding branch passes through the second supporting plate and is coupled to the second coupling patch;

[0012] The second supporting plate comprises a second feeding surface and a second coupling surface which are arranged opposite to each other, a third coupling patch and a fourth coupling patch are arranged on both sides of a cross position on the second coupling surface, a first end of the third coupling patch passes through the antenna radiating plate and is electrically connected to the second electric dipole, a first end of the fourth coupling patch passes through the antenna radiating plate and is electrically connected to the third electric dipole, an inverted L-shaped second feeding branch is arranged on the second feeding surface, a vertical arm of the second feeding branch is coupled to the third coupling patch, and a horizontal arm of the second feeding branch passes through the first supporting plate and is coupled to the fourth coupling patch.

[0013] In some optional embodiments of the present invention, a first comb-shaped structure is provided on the vertical arm at the corner position of the first feeding branch, and a second comb-shaped structure is provided at the end of the horizontal arm of the first feeding branch, and the combing openings of the first comb-shaped structure and the second comb-shaped structure are oriented vertically;

[0014] A third comb-shaped structure is arranged on the vertical arm at the corner position of the second feeding branch, and a fourth comb-shaped structure is arranged at the end of the horizontal arm of the second feeding branch. The combing openings of the third comb-shaped structure and the fourth comb-shaped structure are oriented vertically.

[0015] In some optional embodiments of the present invention, a ground layer is provided on the bottom surface of the antenna supporting floor, and the second end of the first coupling patch, the second end of the second coupling patch, the second end of the third coupling patch, and the second end of the fourth coupling patch all pass through the antenna supporting floor and are electrically connected to the ground layer.

[0016] In some optional embodiments of the present invention, a square patch reflective array is arranged on the surface of the antenna supporting floor around the feeding bracket.

[0017] In some optional embodiments of the present invention, the antenna supporting floor, the antenna radiating plate and the signal resonance plate are all square, the edge of the antenna radiating plate is arranged non-parallel to the edge of the antenna supporting floor, and the edge of the signal resonance plate is arranged parallel to the edge of the antenna radiating plate.

[0018] In some optional embodiments of the present invention, the orthographic projection of the signal resonance plate on the antenna radiation plate completely covers the antenna radiation plate.

[0019] In some optional embodiments of the present invention, the first electric dipole, the second electric dipole, the third electric dipole and the fourth electric dipole are all hexagons with hollow interiors.

[0020] Beneficial effects are as follows: the present invention provides a dual-polarization high-gain base station antenna, comprising an antenna support floor, a feeding bracket vertically arranged on the antenna support floor, an antenna radiating plate arranged on the feeding bracket, and a signal resonant plate suspended above the antenna radiating plate, wherein the antenna support floor, the antenna radiating plate and the signal resonant plate are parallel; the signal resonant plate is provided with a Jerusalem-type metasurface structure facing outward, and a circular patch metasurface structure is provided with an inward surface of the signal resonant plate, and a Fabry-Perot resonant cavity is formed between the Jerusalem-type metasurface structure and the circular patch metasurface structure. The base station antenna of the present invention integrates a Fabry-Perot resonant cavity structure, and the signal emitted by the antenna radiating plate will be reflected and transmitted when passing through the resonant cavity, so that the signal produces a superposition effect, thereby improving the antenna gain effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The figure is a schematic diagram of the side structure of a dual-polarization high-gain base station antenna of the present invention.

[0022] Figure 2 The top structure diagram of a dual-polarization high-gain base station antenna of the present invention.

[0023] Figure 3 The figure is a schematic diagram of the bottom structure of a signal resonance plate of the present invention.

[0024] Figure 4 The figure is a schematic diagram of the surface structure of an antenna radiation plate of the present invention.

[0025] Figure 5 This is a schematic structural diagram of a feeding bracket from the first perspective of the present invention.

[0026] Figure 6 This is a schematic structural diagram of a feeding bracket from a second viewing angle of the present invention.

[0027] Figure 7 The present invention is a schematic diagram of the bottom structure of a dual-polarization high-gain base station antenna.

[0028] Figure 8 It is a schematic diagram of the test results of the port reflection coefficient of the dual-polarization high-gain base station antenna according to the example of the present invention.

[0029] Fig. 9 This is a graph showing the isolation test results of the dual-polarization high-gain base station antenna according to an example of the present invention.

[0030] The reference numerals in the figures are as follows:

[0031] 10-antenna supporting floor; 20-feeding bracket; 30-antenna radiating plate; 40-signal resonant plate; 50-Jerusalem type metasurface structure; 60-circular patch metasurface structure; 70-cross metasurface unit; 80-square array metasurface unit; 90-first electric dipole; 100-second electric dipole; 110-third electric dipole; 120-fourth electric dipole; 130-first supporting plate; 140-second supporting plate; 150-first feeding surface; 160-first coupling surface; 170-first coupling patch; 180-second coupling patch; 190-first feeding branch; 250-first comb-type structure; 260-second comb-type structure; 290-ground layer; 300-square patch reflection array. DETAILED DESCRIPTION

[0032] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0033] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0035] Reference throughout the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, when the phrases "in one embodiment" or "in some embodiments" appear in various places throughout the specification, not all references are to the same embodiment. Furthermore, in one or more embodiments, the particular features, structures, or characteristics may be combined in any suitable manner.

[0036] The low profile, compactness, and miniaturization are universal and practical in base station antenna design. These features can maintain high gain and wide bandwidth, and promote cost reduction and efficiency improvement of base station antennas. Not only can it reduce the site area required for urban deployment and improve the space utilization of base station antennas, it also has the advantages of easy installation and disassembly, effectively reducing labor and time costs.

[0037] After investigating existing antenna products, it was found that the introduction of Fabry-Perot resonant cavity in low-profile, compact dual-polarized base station antennas may have development potential. With the help of Fabry-Perot resonant cavity, base station antennas can improve gain and bandwidth, better achieve regional signal coverage, and break through the limitations of existing base station antenna performance. Based on the advantages of base station antennas, this paper continues and optimizes the characteristics of low profile, miniaturization and gain.

[0038] For this purpose, see Figure 1 The present invention provides a dual-polarization high-gain base station antenna, including an antenna supporting floor 10, a feeding bracket 20 vertically arranged on the antenna supporting floor 10, an antenna radiating plate 30 arranged on the feeding bracket 20, and a signal resonant plate 40 suspended above the antenna radiating plate 30, wherein the antenna supporting floor 10, the antenna radiating plate 30 and the signal resonant plate 40 are parallel.

[0039] In some optional embodiments of the present invention, the shapes of the antenna supporting floor 10, the antenna radiating plate 30 and the signal resonant plate 40 can be circular or polygonal. Exemplarily, the antenna supporting floor 10, the antenna radiating plate 30 and the signal resonant plate 40 are all square (for example, a square), the edge of the antenna radiating plate 30 is not parallel to the edge of the antenna supporting floor 10 (that is, the four sides of the antenna radiating plate 30 and the four sides of the antenna supporting floor 10 are not parallel), and the edge of the signal resonant plate 40 and the edge of the antenna radiating plate 30 are parallel (that is, the four sides of the signal resonant plate 40 and the four sides of the antenna radiating plate 30 are parallel). In an exemplary embodiment of the present invention, taking the antenna supporting floor 10, the antenna radiating plate 30 and the signal resonance plate 40 as squares as an example, if the antenna supporting floor 10 is used as a placement reference, the placement of the antenna radiating plate 30 can be understood as being obtained by rotating a certain angle (excluding the endpoints, taking a value of 0-90°, such as 45° as an example) around the center of the antenna radiating plate 30 on the basis of the placement reference of the antenna supporting floor 10. Preferably, the center point of the antenna supporting floor 10, the center point of the antenna radiating plate 30 and the center point of the signal resonance plate 40 are located on the same vertical line.

[0040] In some optional embodiments of the present invention, in order for the signal resonance plate 40 to better receive the signal radiated by the antenna radiation plate 30, the orthographic projection of the signal resonance plate 40 on the antenna radiation plate 10 completely covers the antenna radiation plate 30. Simply put, the size of the signal resonance plate 40 is larger than the size of the antenna radiation plate 30. In an exemplary embodiment of the present invention, the size of the signal resonance plate 40 can be 64.4mm×64.4mm×1mm, and the size of the antenna radiation plate 30 can be 60mm×60mm×1mm. The spacing between the signal resonance plate 40 and the antenna radiation plate 30 can be 2-5mm, and can be 2mm for example. The signal resonance plate 40 uses FR4-epoxy material with a dielectric constant of 4.6 and a dielectric loss factor of 0.016. The upper surface of the resonant cavity refers to the Jerusalem type unit, while the lower surface refers to the circular patch type metasurface unit, the aperture type metasurface unit, and the gain antenna loaded with the ACM (adaptive coding and modulation) unit. The ACM metasurface unit is designed to offset the reflected electromagnetic waves by introducing a certain phase difference, thereby reducing the intensity of the reflected signal of the antenna in the receiving direction. Subsequent test data showed that the resonant cavity has a significant effect on improving the bandwidth and gain of the antenna.

[0041] See also Figure 2In the present invention, the signal resonant plate 40 is provided with a Jerusalem-type metasurface structure 50 on the surface facing outward (ie, the surface facing away from the antenna radiation plate 30), see Figure 3 , a circular patch metasurface structure 60 is provided on the inner surface of the signal resonance plate (i.e., the surface facing the antenna radiation plate 30), and a Fabry-Perot resonant cavity is formed between the Jerusalem-type metasurface structure 50 and the circular patch metasurface structure 60. The Fabry-Perot resonant cavity can support multi-frequency signal oscillations. By adjusting its structural parameters, it can adapt to the resonant frequencies of different modes, thereby realizing the selection and adjustment of the frequency band used by the antenna, while stabilizing and improving the impedance matching effect of the antenna, so that the antenna can perform better. In the resonant cavity, different reflection and transmission characteristics are generated for different modes (integer multiples of the wavelength). This characteristic will make the gain distribution of the antenna different in different modes, helping to better optimize and adjust the directivity of the antenna.

[0042] See also Figure 2 In some optional embodiments of the present invention, the Jerusalem-type metasurface structure 50 includes a cross-shaped metasurface unit 70, and a square array metasurface unit 80 distributed in four quadrants of the cross-shaped metasurface unit 70; the circular patch metasurface structure 60 includes a circular array metasurface unit; the square patches of the square array metasurface unit 80 correspond one to one with the circular patches of the circular array metasurface unit. A metasurface refers to a planar periodic structure formed by arranging metal patch units in a specific period. Metasurface structures can be divided into two types: pore type and patch type, and the present invention adopts a patch type metasurface structure. This type of metasurface structure can achieve total reflection of incident electromagnetic waves at a specific frequency. In the present invention, a Fabry-Perot resonant cavity constructed by two parallel reflectors formed by the square array metasurface unit 80 and the circular array metasurface unit is used, and reflection and transmission occur when the signal passes through the resonant cavity, resulting in a signal superposition effect. At the same time, the incident signal is reflected back and forth in the resonant cavity to form resonance. If specific conditions are met, the incident signal can be selectively enhanced and filtered, thereby improving the radiation efficiency and thus the gain effect of the antenna.

[0043] See also Figure 4In some optional embodiments of the present invention, a four-leaf clover-shaped radiating antenna is provided on one side of the antenna radiating plate 30 facing the signal resonant plate 40, and the four-leaf clover-shaped radiating antenna includes a first electric dipole 90, a second electric dipole 100, a third electric dipole 110, and a fourth electric dipole 120, wherein the first electric dipole 90 and the fourth electric dipole 120 are arranged diagonally, and the second electric dipole 100 and the third electric dipole 110 are arranged diagonally. In some optional embodiments of the present invention, the first electric dipole 90, the second electric dipole 100, the third electric dipole 110, and the fourth electric dipole 120 are all hexagons with hollow interiors. In the present invention, the radiation unit is designed to adjust the impedance matching and isolation of the antenna, and a cross-symmetrical electric dipole structure is adopted. The radiation patch refers to the common four-leaf clover radiation patch, and the above-mentioned symmetrical electric dipole model is proposed, aiming to achieve good antenna impedance matching and effective coupling effect. Since the length of the symmetrical electric dipole is related to the operating frequency of the antenna, in order to achieve miniaturization of the antenna, the present invention can select a quarter wavelength as the length of the electric dipole.

[0044] See also Figure 5 and Figure 6 In some optional embodiments of the present invention, the feeding bracket 20 includes a first support plate 130 and a second support plate 140 arranged crosswise. The first support plate 130 includes a first feeding surface 150 and a first coupling surface 160 ( Figure 6 ), a first coupling patch 170 and a second coupling patch 180 are respectively arranged on both sides of the cross position on the first coupling surface 160 ( Figure 6 ), the first end of the first coupling patch 170 (i.e., the upper end in the figure) passes through the antenna radiation board 30 and is electrically connected to the first electric dipole 90, the first end of the second coupling patch 180 passes through the antenna radiation board 30 and is electrically connected to the fourth electric dipole 120, and the first feeding surface 150 is provided with an inverted L-shaped first feeding branch 190 ( Figure 5 As shown), the vertical arm of the first feeding branch 190 is coupled to the first coupling patch 170 , and the horizontal arm of the first feeding branch 190 passes through the second supporting plate 140 and is coupled to the second coupling patch 180 .

[0045] The second support plate 140 includes a second feeding surface and a second coupling surface that are arranged opposite to each other. A third coupling patch and a fourth coupling patch are arranged on both sides of the cross position on the second coupling surface, respectively. The first end of the third coupling patch passes through the antenna radiation plate and is electrically connected to the second electric dipole 100. The first end of the fourth coupling patch passes through the antenna radiation plate 30 and is electrically connected to the third electric dipole 110. An inverted L-shaped second feeding branch is arranged on the second feeding surface. The vertical arm of the second feeding branch is coupled with the third coupling patch. The horizontal arm of the second feeding branch passes through the first support plate 130 and is coupled with the fourth coupling patch. In the present invention, a feeder structure of an X plate (i.e., the first support plate 130) and a Y plate (i.e., the second support plate 140) is adopted. The radio frequency signal is transmitted to the antenna through the inverted L-shaped balun feeding structure to realize radiation or reception. The feeder and the antenna adopt microstrip printing technology. The vertical cross feeding structure of the X plate and the Y plate is vertically staggered and distributed through the openings of the dielectric plate.

[0046] See also Figure 5 In some optional embodiments of the present invention, a first comb-type structure 250 is provided on the vertical arm at the corner position of the first feeding branch 190, and a second comb-type structure 260 is provided at the end of the horizontal arm of the first feeding branch 190, and the combing mouths of the first comb-type structure 250 and the second comb-type structure 260 are oriented vertically; a third comb-type structure is provided on the vertical arm at the corner position of the second feeding branch, and a fourth comb-type structure is provided at the end of the horizontal arm of the second feeding branch, and the combing mouths of the third comb-type structure and the fourth comb-type structure are oriented vertically. The feed line in the present invention adopts a bending path, and by adjusting the shape of the antenna feed line (i.e., adding a comb-type structure), the longitudinal and lateral lengths can be reduced, the size can be reduced, and the antenna is compact and miniaturized, and an SPPs (surface plasmon) metamaterial structure is introduced to adjust the impedance matching and optimize the antenna performance parameters.

[0047] See also Figure 7 In some optional embodiments of the present invention, a grounding layer 290 is provided on the bottom surface of the antenna supporting floor 10, and the second end of the first coupling patch 170 (i.e., the bottom end in the figure), the second end of the second coupling patch 180, the second end of the third coupling patch, and the second end of the fourth coupling patch all pass through the antenna supporting floor and are electrically connected to the grounding layer 290.

[0048] See also Figure 2In some optional embodiments of the present invention, a square patch reflective array 300 is provided on the surface of the antenna support floor 10 around the feeding bracket 20. In this embodiment of the present invention, the antenna support floor 10 not only supports the base station antenna structure, but also plays a role of radiation reflection, reflecting the downward scattered radiation energy back. The size of the antenna support floor 10 can be 113mm×113mm×1mm. A patch-type metasurface structure is adopted in the antenna support floor 10, and this type of metasurface structure can achieve total reflection of the incident electromagnetic waves at a specific frequency. The base station antenna in the present invention can also improve the antenna parameters by optimizing this structure.

[0049] In order to better illustrate the performance of the dual-polarization high-gain base station antenna of the present invention, the present invention processes an antenna object, the structure of which includes Figure 1-Figure 7 All the features shown in this paper are measured for the performance of the antenna. The results are as follows: Figure 8 As shown in the figure, S11 represents the reflection coefficient of port 1 when port 2 is matched; S22 represents the reflection coefficient of port 2 when port 1 is matched. The lower the values ​​of S11 and S22, the better the impedance matching effect of the antenna. Usually, the requirement for antennas is that the port reflection coefficient is less than -10dB, while the engineering application antenna requires the port reflection coefficient to be less than -14dB. Therefore, Figure 8 The results presented in this paper show that the antenna broadband requirement is achieved. Fig. 9 As shown, the base station antenna of the present invention is installed in a vertically spaced manner to obtain a larger isolation. The minimum isolation requirement of the antenna is less than -10dB. The isolation of the antenna design reaches below -15dB, and even reaches below -20dB, achieving a high isolation.

[0050] The dual-polarized high-gain base station antenna of the present invention has the characteristics of miniaturization and low profile, and is suitable for the current 5G communication market environment. The antenna achieves working frequency band coverage of 2.4-2.59GHz, 3.16-3.86GHz, 3.98-4.28GHz, and the center resonant frequency is 3.45GHz. The overall size of its antenna assembly is 113mm×113mm×25.7mm. The base station antenna dielectric plate material used in the present invention is FR4-epoxy, which has a dielectric constant of 4.6 and a dielectric loss factor of 0.016. The antenna consists of four parts in total. , including a Fabry-Perot resonant cavity, a symmetrical electric dipole support plate, an X / Y axis support dielectric plate and an antenna support floor. In the technical combination, it is explored to improve the directional pattern, gain and reflection coefficient data of the base station antenna by loading metasurfaces, metamaterial structures and Fabry-Perot resonant cavities, and successfully improve the gain value. At the same time, the antenna also achieves the requirements of miniaturization while ensuring high gain and wide bandwidth.

[0051] In summary, the present invention mainly studies and explores the requirements of miniaturization, high gain, and wide bandwidth of base station antennas.

[0052] Miniaturization application: Miniaturized dual-polarized base station antennas can achieve dual-polarized (horizontal and vertical) radiation in a limited space, thereby improving the space utilization efficiency of base station antennas. By loading more antenna elements in the limited base station antenna installation space, the capacity and coverage of the communication system can be improved.

[0053] High gain effect: High-gain base station antennas can transmit communication signals to a greater distance more fully, thereby expanding the signal coverage of the communication system. High-gain base station antenna signals can penetrate obstacles or transmit farther in complex environments. This means that better communication coverage can be achieved in mountainous areas, urban high-rise areas, or areas far away from base stations. At the same time, the high signal strength will reduce signal attenuation during transmission, thereby improving the signal quality and communication stability at the receiving end. This enables more reliable communication in areas with poor signal coverage or in environments with large signal interference.

[0054] Broadband function: Broadband base station antennas can provide communication services in different frequency bands and support multi-band communications. They can more effectively utilize spectrum resources, avoid vacant or wasted frequency bands, and improve spectrum utilization.

[0055] The research significance of the low-profile compact dual-polarized base station antenna of the present invention is to improve the space utilization efficiency of the base station antenna, while improving the signal area coverage, better using spectrum resources, and meeting the use needs. The development and improvement of such requirements also have practical application significance. With the prosperity of the Internet and the Internet of Things, the rapid development and popularization of communication technology have made base station antennas one of the important components of wireless communication systems. At the same time, the current growing demand and the continuous development of technology are driving the demand for base station antennas towards performance characteristics such as dual polarization, broadband, miniaturization, and high gain.

[0056] Although the present invention has been disclosed as above in terms of preferred embodiments, the above preferred embodiments are not intended to limit the present invention. A person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined in the claims.

Claims

1. A dual-polarization high-gain base station antenna, characterized in that: It comprises an antenna supporting floor, a feeding bracket vertically arranged on the antenna supporting floor, an antenna radiating plate arranged on the feeding bracket, and a signal resonating plate suspended above the antenna radiating plate, wherein the planes of the antenna supporting floor, the antenna radiating plate and the signal resonating plate are parallel; The signal resonance plate is provided with a Jerusalem-type metasurface structure facing outward, and a circular patch metasurface structure is provided with an inner surface of the signal resonance plate. A Fabry-Perot resonant cavity is formed between the Jerusalem-type metasurface structure and the circular patch metasurface structure.

2. The dual-polarization high-gain base station antenna according to claim 1, characterized in that: The Jerusalem-type supersurface structure includes a cross-shaped supersurface unit and square array supersurface units distributed in four quadrants of the cross-shaped supersurface unit; the circular patch supersurface structure includes a circular array supersurface unit; the square patches of the square array supersurface unit correspond one-to-one to the circular patches of the circular array supersurface unit.

3. The dual-polarization high-gain base station antenna according to claim 2, characterized in that: A four-leaf clover-shaped radiating antenna is arranged on one side of the antenna radiating plate facing the signal resonance plate, and the four-leaf clover-shaped radiating antenna includes a first electric dipole, a second electric dipole, a third electric dipole and a fourth electric dipole, wherein the first electric dipole and the fourth electric dipole are arranged diagonally, and the second electric dipole and the third electric dipole are arranged diagonally.

4. The dual-polarization high-gain base station antenna according to claim 3, characterized in that: The feeding bracket comprises a first supporting plate and a second supporting plate arranged crosswise; The first supporting plate comprises a first feeding surface and a first coupling surface which are arranged opposite to each other, a first coupling patch and a second coupling patch are arranged on both sides of a cross position of the first coupling surface, a first end of the first coupling patch passes through the antenna radiation plate and is electrically connected to the first electric dipole, a first end of the second coupling patch passes through the antenna radiation plate and is electrically connected to the fourth electric dipole, an inverted L-shaped first feeding branch is arranged on the first feeding surface, a vertical arm of the first feeding branch is coupled to the first coupling patch, and a horizontal arm of the first feeding branch passes through the second supporting plate and is coupled to the second coupling patch; The second supporting plate comprises a second feeding surface and a second coupling surface which are arranged opposite to each other, a third coupling patch and a fourth coupling patch are arranged on both sides of a cross position on the second coupling surface, a first end of the third coupling patch passes through the antenna radiating plate and is electrically connected to the second electric dipole, a first end of the fourth coupling patch passes through the antenna radiating plate and is electrically connected to the third electric dipole, an inverted L-shaped second feeding branch is arranged on the second feeding surface, a vertical arm of the second feeding branch is coupled to the third coupling patch, and a horizontal arm of the second feeding branch passes through the first supporting plate and is coupled to the fourth coupling patch.

5. The dual-polarization high-gain base station antenna according to claim 4, characterized in that: A first comb-shaped structure is provided on the vertical arm at the corner position of the first feeding branch, and a second comb-shaped structure is provided at the end of the horizontal arm of the first feeding branch, and the combing openings of the first comb-shaped structure and the second comb-shaped structure are oriented vertically; A third comb-shaped structure is arranged on the vertical arm at the corner position of the second feeding branch, and a fourth comb-shaped structure is arranged at the end of the horizontal arm of the second feeding branch. The combing openings of the third comb-shaped structure and the fourth comb-shaped structure are oriented vertically.

6. The dual-polarization high-gain base station antenna according to claim 4, characterized in that: A ground layer is provided on the bottom surface of the antenna supporting floor, and the second end of the first coupling patch, the second end of the second coupling patch, the second end of the third coupling patch, and the second end of the fourth coupling patch all pass through the antenna supporting floor and are electrically connected to the ground layer.

7. The dual-polarization high-gain base station antenna according to any one of claims 1 to 6, characterized in that: A square patch reflection array is arranged on the surface of the antenna supporting floor around the feeding bracket.

8. The dual-polarization high-gain base station antenna according to claim 1, characterized in that: The antenna supporting floor, the antenna radiating plate and the signal resonance plate are all square, the edge of the antenna radiating plate is arranged non-parallel to the edge of the antenna supporting floor, and the edge of the signal resonance plate is arranged parallel to the edge of the antenna radiating plate.

9. The dual-polarization high-gain base station antenna according to claim 8, characterized in that: The orthographic projection of the signal resonance plate on the antenna radiation plate completely covers the antenna radiation plate.

10. The dual-polarization high-gain base station antenna according to claim 3, characterized in that: The first electric dipole, the second electric dipole, the third electric dipole and the fourth electric dipole are all hexagons with hollow interiors.

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