Dual-polarized antenna

Abstract

The utility model provides a dual-polarized antenna, and relates to the technical field of wireless communication. The dual-polarized antenna comprises a first radiation structure which comprises a first metal plate and a second metal plate; the second radiation structure comprises a third metal plate and a fourth metal plate; the radiation direction of the first radiation structure is perpendicular to the radiation direction of the second radiation structure. The first part of the first metal plate is opposite to the first part of the second metal plate, the first part of the third metal plate is opposite to the first part of the fourth metal plate, and a containing space is defined by the first parts of the four metal plates; and the first feed structure is connected with the first radiation structure, and the second feed structure is connected with the second radiation structure. According to the scheme of the utility model, the number of antennas in a limited space can be increased, so that the signal transmission rate and the anti-interference capability in the limited space are improved.

Description

Technical Field

[0001] This utility model relates to the field of wireless communication technology, specifically to a dual-polarized antenna. Background Technology

[0002] Wireless communication systems face numerous challenges in narrow spaces such as tunnels. On the one hand, the enclosed nature of tunnels makes it difficult to provide signal coverage from the outside, necessitating the deployment of specialized equipment within the tunnel. On the other hand, the limited space inside tunnels, coupled with the significant airflow generated by high-speed trains, causes vibrations in the internal equipment.

[0003] Currently, wireless communication coverage inside tunnels mainly employs leaky cables or distributed antenna systems. A leaky cable is a coaxial cable structure that radiates electromagnetic waves by cutting grooves in the outer conductor to cut surface current. A distributed antenna system achieves comprehensive signal coverage within the tunnel by arranging one or more antennas at intervals, with the antennas connected by passive components such as feeders and power dividers. However, the leaky cable solution requires laying cables at intervals along the tunnel, leading to significant signal attenuation and necessitating additional source nodes, resulting in high laying costs. Furthermore, the clamping and installation of leaky cables are complex and labor-intensive. Leaky cables struggle to support dual polarization, requiring multiple leaky cables to support higher current counts. Additionally, laying multiple leaky cables requires spacing at certain heights, but tunnel installation space is limited, making the laying of four or more leaky cables difficult and significantly increasing costs. The distributed antenna system solution uses a single-polarized antenna structure, resulting in lower gain, and limitations on the number of antennas and signal transmission efficiency. Moreover, single-polarized antennas are susceptible to interference in multipath propagation environments, leading to signal quality degradation.

[0004] Therefore, the current method of using leaky cable for wireless communication coverage inside tunnels has the problem of high cost, and the method of using distributed antenna system has the problem of limited performance. Utility Model Content

[0005] The purpose of this invention is to provide a dual-polarized antenna to solve the problems of high cost and limited performance in wireless communication coverage inside tunnels in the prior art.

[0006] To solve the above-mentioned technical problems, this utility model is implemented as follows:

[0007] This utility model embodiment provides a dual-polarized antenna, including:

[0008] The first radiating structure includes a first metal plate and a second metal plate;

[0009] The second radiating structure includes a third metal plate and a fourth metal plate;

[0010] Wherein, the radiation direction of the first radiation structure is perpendicular to the radiation direction of the second radiation structure;

[0011] The first part of the first metal plate is disposed opposite to the first part of the second metal plate, the first part of the third metal plate is disposed opposite to the first part of the fourth metal plate, and the first parts of the four metal plates are arranged to form an accommodating space.

[0012] Two power feeding structures are provided, wherein the first power feeding structure is connected to the first radiating structure, and the second power feeding structure is connected to the second radiating structure.

[0013] Optionally, in the dual-polarized antenna, the coaxial cable of the first feeding structure passes through the first metal plate, the outer conductor of the coaxial cable of the first feeding structure is fixedly connected to the first metal plate, and the inner conductor of the coaxial cable of the first feeding structure passes through the accommodating space and is fixedly connected to the second metal plate.

[0014] Optionally, in the dual-polarized antenna, the coaxial cable of the second feeding structure passes through the third metal plate, the outer conductor of the coaxial cable of the second feeding structure is fixedly connected to the third metal plate, and the inner conductor of the coaxial cable of the second feeding structure passes through the accommodating space and is fixedly connected to the fourth metal plate.

[0015] Optionally, in the dual-polarized antenna, the coaxial cable of the first feeding structure passes through the second metal plate, and the outer conductor of the coaxial cable of the first feeding structure is fixedly connected to the second metal plate.

[0016] Optionally, in the dual-polarized antenna, the coaxial cable of the second feeding structure passes through the fourth metal plate, and the outer conductor of the coaxial cable of the second feeding structure is fixedly connected to the fourth metal plate.

[0017] Optionally, the dual-polarized antenna further includes:

[0018] Two short-circuit structures are disposed within the accommodating space, wherein each short-circuit structure is connected to the first radiating structure and the second radiating structure, respectively.

[0019] Optionally, in the dual-polarized antenna, the short-circuit structure is cross-shaped, and the four ends of the short-circuit structure are respectively connected to four metal plates.

[0020] Optionally, in the dual-polarized antenna, a gap is provided between the side of the first metal plate near the third metal plate and the surface of the third metal plate.

[0021] A gap is provided between the side of the second metal plate near the fourth metal plate and the surface of the fourth metal plate;

[0022] A gap is provided between the side of the fourth metal plate near the first metal plate and the surface of the first metal plate.

[0023] A gap is provided between the side of the third metal plate near the second metal plate and the surface of the second metal plate.

[0024] Optionally, in the dual-polarized antenna, the second portion of each metal plate is formed with a plurality of toothed structures.

[0025] Optionally, in the dual-polarized antenna, the plurality of toothed structures of the first metal plate and the second metal plate are symmetrically arranged, and / or the plurality of toothed structures of the third metal plate and the fourth metal plate are symmetrically arranged.

[0026] Compared with existing technologies, the dual-polarized antenna provided in this embodiment includes: a first radiating structure comprising a first metal plate and a second metal plate; a second radiating structure comprising a third metal plate and a fourth metal plate; wherein the radiation direction of the first radiating structure is perpendicular to the radiation direction of the second radiating structure; a first portion of the first metal plate is disposed opposite to a first portion of the second metal plate, and a first portion of the third metal plate is disposed opposite to a first portion of the fourth metal plate, the first portions of the four metal plates forming an accommodating space; and two feeding structures, wherein the first feeding structure is connected to the first radiating structure, and the second feeding structure is connected to the second radiating structure. Thus, it features dual polarization, high gain, and can increase the number of antennas in a limited space, thereby reducing the cost of wireless communication coverage in a limited space, and improving the signal transmission rate and anti-interference capability in a limited space. Attached Figure Description

[0027] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0028] Figure 1 This is a left view of the dual-polarized antenna described in an embodiment of the present invention;

[0029] Figure 2 This is a right view of the dual-polarized antenna described in an embodiment of the present invention;

[0030] Figure 3 This is a top view of the dual-polarized antenna described in an embodiment of the present invention;

[0031] Figure 4 This is one of the schematic diagrams showing the welding relationship of the dual-polarized antenna described in this embodiment of the utility model;

[0032] Figure 5 This is the second schematic diagram of the welding relationship of the dual-polarized antenna described in this embodiment of the present invention;

[0033] Figure 6 This is one of the schematic diagrams of the metal plate structure of the dual-polarized antenna described in this embodiment of the present invention;

[0034] Figure 7 This is the second schematic diagram of the metal plate structure of the dual-polarized antenna described in this embodiment of the present invention;

[0035] Figure 8 This is a schematic diagram showing the dimensions of the dual-polarized antenna described in an embodiment of the present invention;

[0036] Figure 9 This is a schematic diagram of the two-port standing wave curves of the dual-polarized antenna described in this embodiment of the invention;

[0037] Figure 10 This is a schematic diagram of the two-port isolation curve of the dual-polarized antenna described in an embodiment of the present invention;

[0038] Figure 11 This is the E-plane radiation pattern of the dual-polarized antenna described in this embodiment of the invention;

[0039] Figure 12 This is the H-plane radiation pattern of the dual-polarized antenna described in this embodiment of the present invention.

[0040] Explanation of reference numerals in the attached figures:

[0041] 1-First metal plate;

[0042] 2-Second metal plate;

[0043] 3-Third metal plate;

[0044] 4-Fourth metal plate;

[0045] 5-First power supply structure;

[0046] 6-Second feeding structure;

[0047] 7-First short-circuit structure;

[0048] 8-Second short-circuit structure. Detailed Implementation

[0049] To make the technical problems, technical solutions and advantages of this utility model clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0050] It should be understood that the phrase "one embodiment" or "an embodiment" throughout the specification means that a specific feature, structure, or characteristic related to the embodiment is included in at least one embodiment of the present invention. Therefore, "in one embodiment" or "in an embodiment" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0051] In various embodiments of this utility model, it should be understood that the sequence number of each process described below does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of this utility model embodiment.

[0052] In addition, the terms "system" and "network" are often used interchangeably in this article.

[0053] In the embodiments provided by this utility model, it should be understood that "B corresponding to A" means that B is associated with A, and B can be determined based on A. However, it should also be understood that determining B based on A does not mean that B is determined solely based on A; B can also be determined based on A and / or other information.

[0054] like Figures 1 to 3 As shown, this embodiment of the present invention provides a dual-polarized antenna, comprising:

[0055] The first radiating structure includes a first metal plate 1 and a second metal plate 2;

[0056] The second radiating structure includes a third metal plate 3 and a fourth metal plate 4;

[0057] The radiation direction of the first radiation structure is perpendicular to the radiation direction of the second radiation structure.

[0058] The first part of the first metal plate 1 is arranged opposite to the first part of the second metal plate 2, the first part of the third metal plate 3 is arranged opposite to the first part of the fourth metal plate 4, and the first parts of the four metal plates enclose an accommodating space.

[0059] Two feeding structures are provided, wherein the first feeding structure 5 is connected to the first radiating structure, and the second feeding structure 6 is connected to the second radiating structure.

[0060] In this embodiment of the invention, the radiation direction of the first radiating structure is perpendicular to the radiation direction of the second radiating structure; in other words, the polarization direction of the first radiating structure is perpendicular to the polarization direction of the second radiating structure. Electromagnetic wave energy is transferred to the first radiating structure through the first feeding structure 5, which is the vertically polarized radiating structure of the dual-polarized antenna. Electromagnetic wave energy is transferred to the second radiating structure through the second feeding structure 6, which is the horizontally polarized radiating structure of the dual-polarized antenna.

[0061] It is understood that the first metal plate 1 and the second metal plate 2 constitute the vertical polarization radiation structure of the dual-polarized antenna. The third metal plate 3 and the fourth metal plate 4 constitute the horizontal polarization radiation structure of the dual-polarized antenna.

[0062] The aforementioned metal plates can be made of one or more of the following metals: aluminum, iron, tin, copper, silver, gold, or platinum, or an alloy of several of them.

[0063] Therefore, this embodiment of the invention employs a dual-polarization design, making it a dual-polarization antenna. This dual-polarization antenna allows for the arrangement of two antennas within the same antenna size, enabling the installation of more antennas in space-constrained tunnel environments, reducing wireless communication coverage costs, and improving installation flexibility and convenience. Furthermore, compared to leaky cables or distributed antenna systems, this dual-polarization antenna has a simpler composition, lower installation and maintenance costs, and is easier to deploy. Additionally, this dual-polarization antenna includes two radiating structures, resulting in higher signal rates and more stable signal quality.

[0064] Specifically, such as Figure 1 and 2 As shown, the four metal plates are arranged symmetrically in a central manner. The first part of the first metal plate 1 and the first part of the second metal plate 2 are separated vertically and arranged opposite each other. The first part of the third metal plate 3 and the first part of the fourth metal plate 4 are separated horizontally and arranged opposite each other.

[0065] To meet strength requirements, the thickness of the four metal plates can be set to 0.1 mm.

[0066] The distance between the first metal plate 1 and the second metal plate 2, as well as the distance between the third metal plate and the fourth metal plate 4, can be determined according to the antenna power capacity requirements, such as being set to 0.01λ to 0.2λ.

[0067] In one embodiment, optionally, a gap is provided between the side of the first metal plate 1 near the third metal plate 3 and the surface of the third metal plate 3.

[0068] A gap is provided between the side of the second metal plate 2 near the fourth metal plate 4 and the surface of the fourth metal plate 4;

[0069] A gap is provided between the side of the third metal plate 3 near the second metal plate 2 and the surface of the second metal plate 2;

[0070] A gap is provided between the side of the fourth metal plate 4 near the first metal plate 1 and the surface of the first metal plate 1.

[0071] It should be noted that the length of the above-mentioned gap can be set from 0.5mm to 1.5mm.

[0072] In one embodiment, optionally, the second portion of each metal plate is formed with a plurality of spaced-apart toothed structures.

[0073] In the embodiments of this utility model, such as Figure 3 As shown, the toothed structure is rectangular. The toothed structure can be understood as the radiating stub of this dual-polarized antenna. The number and size of the toothed structure can affect the frequency range, directivity, and performance of the antenna, such as gain and VSWR. Its specific design can be determined based on experience or electromagnetic simulation, and is not limited here.

[0074] Optionally, the plurality of toothed structures of the first metal plate and the plurality of toothed structures of the second metal plate are arranged symmetrically, and / or, the plurality of toothed structures of the third metal plate and the plurality of toothed structures of the fourth metal plate are arranged symmetrically. That is, the toothed structures of the first metal plate and the toothed structures of the second metal plate are arranged symmetrically one-to-one, and / or, the toothed structures of the third metal plate and the toothed structures of the fourth metal plate are arranged symmetrically one-to-one.

[0075] Optionally, the four metal plates are formed into a long strip shape.

[0076] Optionally, the four metal plates are the same size, including the same length and the same width.

[0077] Optionally, the width and height of the accommodating space are the same.

[0078] In one embodiment, optionally, the dual-polarized antenna further includes:

[0079] Two short-circuit structures are spaced apart within the accommodating space, wherein each short-circuit structure is connected to the first radiating structure and the second radiating structure, respectively.

[0080] In this embodiment of the invention, two short-circuit structures are used to adjust the performance of the dual-polarized antenna, such as gain and VSWR. Figure 3 As shown, the short-circuit point of each short-circuit structure is located on the surface of the metal plate, such as... Figure 3The first short-circuit structure 7 has a short-circuit point 1, and the second short-circuit structure 8 has a short-circuit point 2. The first short-circuit structure 7 and the second short-circuit structure 8 can be positioned away from the two radiating structures. Optionally, the first short-circuit structure 7 is located approximately 2 / 3 of the length of the metal plate from the antenna port side; more preferably, the first short-circuit structure 7 is located approximately 3.25λ from the antenna port side. Optionally, the second short-circuit structure 8 is located 0.5λ further from the antenna port side than the first short-circuit structure 7.

[0081] The antenna port side is the side of the dual-polarized antenna that has a feeding structure.

[0082] Optionally, the short-circuit structure is cross-shaped, with each of its four ends connected to one of four metal plates. The short-circuit structure is made of metal. The diameter of the short-circuit structure can be adjusted according to processing requirements, such as from 0.01λ to 0.05λ.

[0083] In one embodiment, optionally, the coaxial cable of the first power supply structure passes through the first metal plate, the outer conductor of the coaxial cable of the first power supply structure is fixedly connected to the first metal plate, and the inner conductor of the coaxial cable of the first power supply structure passes through the accommodating space and is fixedly connected to the second metal plate.

[0084] The coaxial cable of the second power supply structure passes through the third metal plate, the outer conductor of the coaxial cable of the second power supply structure is fixedly connected to the third metal plate, and the inner conductor of the coaxial cable of the second power supply structure passes through the accommodating space and is fixedly connected to the fourth metal plate.

[0085] In the embodiments of this utility model, such as Figure 4 As shown, each power supply structure includes a feed point and a coaxial cable, and the coaxial cable includes an outer conductor and an inner conductor.

[0086] like Figure 5 As shown, the distance from the feed point 1 of the first feed structure 5 to one end of the antenna is d1, and the distance from the feed point 2 of the second feed structure 6 to one end of the antenna is d2.

[0087] The first metal plate 1 has a through hole, the size of which is equal to the size of the outer conductor of the coaxial cable of the first power supply structure 5. The second metal plate 2 does not have a through hole. The coaxial cable of the first power supply structure 5 passes through the through hole in the first metal plate 1, the outer conductor of the coaxial cable of the first power supply structure 5 is welded to the first metal plate 1, and the inner conductor of the coaxial cable of the first power supply structure 5 extends into the accommodating space and is welded to the second metal plate 2.

[0088] The third metal plate 3 has a through hole, the size of which is equal to the size of the outer conductor of the coaxial cable of the second power supply structure 6. The fourth metal plate 4 does not have a through hole. The coaxial cable of the second power supply structure 6 passes through the through hole in the third metal plate 3, the outer conductor of the coaxial cable of the second power supply structure 6 is welded to the third metal plate 3, and the inner conductor of the coaxial cable of the second power supply structure 6 extends into the accommodating space and is welded to the fourth metal plate 4.

[0089] In one embodiment, the coaxial cable of the first power supply structure passes through the second metal plate, and the outer conductor of the coaxial cable of the first power supply structure is fixedly connected to the second metal plate.

[0090] The coaxial cable of the second power supply structure passes through the fourth metal plate, and the outer conductor of the coaxial cable of the second power supply structure is fixedly connected to the fourth metal plate.

[0091] In this embodiment of the invention, the first metal plate 1 has a through hole, the size of which is equal to the size of the outer conductor of the coaxial cable of the first power supply structure 5. The second metal plate 2 also has a through hole, the size of which is equal to the size of the outer conductor of the coaxial cable of the first power supply structure 5. The coaxial cable of the first power supply structure 5 passes through the through hole of the first metal plate 1, the outer conductor of the coaxial cable of the first power supply structure 5 is welded to the first metal plate 1, the inner conductor of the coaxial cable of the first power supply structure 5 extends into the accommodating space and is welded to the second metal plate 2, the outer conductor of the coaxial cable of the first power supply structure 5 passes through the through hole of the second metal plate 2, and the outer conductor of the coaxial cable of the first power supply structure 5 is welded to the second metal plate 2.

[0092] The third metal plate 3 has a through hole, the size of which is equal to the size of the outer conductor of the coaxial cable of the second feed structure 6. The fourth metal plate 4 also has a through hole, the size of which is equal to the size of the outer conductor of the coaxial cable of the first feed structure 5. The coaxial cable of the second feed structure 6 passes through the through hole in the third metal plate 3, the outer conductor of the coaxial cable of the second feed structure 6 is welded to the third metal plate 3, the inner conductor of the coaxial cable of the second feed structure 6 extends into the accommodating space and is welded to the fourth metal plate 4, the outer conductor of the coaxial cable of the second feed structure 6 passes through the through hole in the fourth metal plate 4, and the outer conductor of the coaxial cable of the second feed structure 6 is welded to the fourth metal plate 4.

[0093] It should be noted that the aforementioned perforated metal plates, such as Figure 6 As shown, a metal plate without perforations, such as Figure 7 As shown.

[0094] Next, combined Figure 8 The structural dimensions of the dual-polarized antenna described in the embodiments of this utility model will be explained.

[0095] Assume the center operating frequency wavelength of the dual-polarized antenna is λ, and the structural dimensions of the dual-polarized antenna are related to the center operating frequency wavelength. The width w of each metal plate (excluding the side teeth) is 0.04λ to 0.2λ, and the distance between the two short-circuit structures and the side of the metal plate is 0.02λ to 0.1λ, meaning the width h of the accommodating space is 0.02λ to 0.1λ. All toothed structures are the same size, and the center-to-center distance between two adjacent toothed structures is approximately 0.05λ to 0.3λ.

[0096] It should be noted that, in order to cover a wider operating frequency band, each structural dimension of this dual-polarized antenna can be designed to have a larger range.

[0097] The width and height of the accommodating space are the same. The width and height of the accommodating space are the distance between the two metal plates. The distance between the two metal plates can be determined according to the power capacity requirements of the antenna. Preferably, it is set to 5mm.

[0098] Figure 8 In this diagram, 'a' represents the distance between the first toothed structure and the antenna port side; 'b' represents the width of the toothed structure; 'c' represents the distance between two adjacent toothed structures; and 'd' represents the height of the toothed structure. The design of 'b' primarily considers the structural stability requirements. 'a' and 'c' can be determined based on the value of 'b' and the total number of toothed structures. The value of 'd' ranges from 0.1λ to 0.12λ.

[0099] The longer each metal plate is, the more toothed structures there are, and the higher the antenna gain. However, as the length of the metal plate increases, the gain improvement becomes smaller and smaller. Here, the length of the metal plate can be between 2λ and 10λ. Preferably, the length of each metal plate can be designed to be 4.75λ.

[0100] After adopting the above structural dimensions, the dimensions can be further optimized using electromagnetic simulation software to determine the optimal parameter dimensions.

[0101] As a preferred embodiment of this utility model, taking the operating frequency band of the dual-polarized antenna as 2515MHz to 2675MHz as an example, after optimization using electromagnetic simulation software, the final dimensions are determined as follows: the length of the metal plate is 555mm, the width of the metal plate (including the edge teeth) is 26mm, the distance of the first short-circuit structure from the left is 375mm, the distance of the second short-circuit structure from the left is 437.5mm, and the diameter of the short-circuit structure is 2.2mm. Other structural dimensions are selected as follows: a = 9mm, b = 4mm, c = 8.5mm, d = 13.5mm.

[0102] like Figures 9 to 12 The diagram shown illustrates the main electrical and gain parameters of the above embodiment. Specifically, Figure 9This is a schematic diagram of the two-port standing wave curves of the dual-polarized antenna described in this embodiment of the invention;

[0103] Figure 10 This is a schematic diagram of the two-port isolation curve of the dual-polarized antenna described in an embodiment of the present invention; Figure 11 This is the E-plane radiation pattern of the dual-polarized antenna described in this embodiment of the invention; Figure 12 This is the H-plane radiation pattern of the dual-polarized antenna described in this embodiment of the present invention.

[0104] In summary, the dual-polarized antenna described in this embodiment is a miniaturized antenna that can be applied in confined spaces, such as tunnels and subways. The dual-polarized antenna includes two mutually perpendicular radiating structures. Compared to leaky cable solutions and distributed antenna systems, it offers lower wireless communication coverage costs, smaller size, more flexible and convenient installation, and superior antenna performance. Therefore, the dual-polarized antenna can increase the number of available antennas within a limited space, improve signal transmission rate and anti-interference capability, thereby enhancing wireless communication coverage performance.

[0105] The exemplary embodiments described above are with reference to the accompanying drawings. Many different forms and embodiments are feasible without departing from the spirit and teachings of this invention. Therefore, this invention should not be construed as limiting the exemplary embodiments set forth herein. Rather, these exemplary embodiments are provided to make this invention complete and convey its scope to those skilled in the art. In these drawings, component dimensions and relative dimensions may be exaggerated for clarity. The terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. As used herein, unless clearly indicated otherwise, the singular forms “a,” “an,” and “the” are intended to include all such forms. It will be further understood that the terms “comprising” and / or “including”, when used in this specification, indicate the presence of the stated features, integers, steps, operations, components, and / or elements, but do not exclude the presence or addition of one or more other features, integers, steps, operations, components, and / or groups thereof. Unless otherwise indicated, when stated, a range of values ​​includes the upper and lower limits of the range and any subranges in between.

[0106] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A dual-polarized antenna, characterized in that, include: The first radiating structure includes a first metal plate and a second metal plate; The second radiating structure includes a third metal plate and a fourth metal plate; Wherein, the radiation direction of the first radiation structure is perpendicular to the radiation direction of the second radiation structure; The first part of the first metal plate is disposed opposite to the first part of the second metal plate, the first part of the third metal plate is disposed opposite to the first part of the fourth metal plate, and the first parts of the four metal plates are arranged to form an accommodating space. Two power feeding structures are provided, wherein the first power feeding structure is connected to the first radiating structure, and the second power feeding structure is connected to the second radiating structure.

2. The dual-polarized antenna according to claim 1, characterized in that, The coaxial cable of the first power supply structure passes through the first metal plate, the outer conductor of the coaxial cable of the first power supply structure is fixedly connected to the first metal plate, and the inner conductor of the coaxial cable of the first power supply structure passes through the accommodating space and is fixedly connected to the second metal plate.

3. The dual-polarized antenna according to claim 1, characterized in that, The coaxial cable of the second power supply structure passes through the third metal plate, the outer conductor of the coaxial cable of the second power supply structure is fixedly connected to the third metal plate, and the inner conductor of the coaxial cable of the second power supply structure passes through the accommodating space and is fixedly connected to the fourth metal plate.

4. The dual-polarized antenna according to claim 2, characterized in that, The coaxial cable of the first power supply structure passes through the second metal plate, and the outer conductor of the coaxial cable of the first power supply structure is fixedly connected to the second metal plate.

5. The dual-polarized antenna according to claim 3, characterized in that, The coaxial cable of the second power supply structure passes through the fourth metal plate, and the outer conductor of the coaxial cable of the second power supply structure is fixedly connected to the fourth metal plate.

6. The dual-polarized antenna according to claim 1, characterized in that, Also includes: Two short-circuit structures are disposed within the accommodating space, wherein each short-circuit structure is connected to the first radiating structure and the second radiating structure, respectively.

7. The dual-polarized antenna according to claim 6, characterized in that, The short-circuit structure is cross-shaped, and its four ends are respectively connected to four metal plates.

8. The dual-polarized antenna according to claim 1, characterized in that, A gap is provided between the side of the first metal plate near the third metal plate and the surface of the third metal plate; A gap is provided between the side of the second metal plate near the fourth metal plate and the surface of the fourth metal plate; A gap is provided between the side of the fourth metal plate near the first metal plate and the surface of the first metal plate. A gap is provided between the side of the third metal plate near the second metal plate and the surface of the second metal plate.

9. The dual-polarized antenna according to claim 1, characterized in that, The second part of each metal plate has multiple tooth-shaped structures.

10. The dual-polarized antenna according to claim 9, characterized in that, The first metal plate and the second metal plate have multiple toothed structures arranged symmetrically, and / or the third metal plate and the fourth metal plate have multiple toothed structures arranged symmetrically.

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