Magnetic current feed broadband dual-polarization microstrip array radio frequency antenna

Abstract

The invention relates to the technical field of microwave antennas, in particular to a magnetic current feed broadband dual-polarization microstrip array radio frequency antenna, which comprises an upper dielectric layer, a lower dielectric layer, a middle dielectric layer and a lower dielectric layer, metal layers are attached to the upper surface and the lower surface of the lower dielectric layer respectively; the lower surface metal layer of the upper dielectric layer is attached to the upper surface metal layer of the lower dielectric layer; the upper dielectric layer and the lower dielectric layer are detachably connected; the air cavity is formed between the upper dielectric layer and the lower dielectric layer; the contact ends of the input ports are arranged on the upper metal surface of the upper dielectric layer, and the access ends of the input ports extend out of the lower metal surface of the lower dielectric layer; the plurality of coupling gaps are formed in the lower surface metal layer of the upper dielectric layer and the upper surface metal layer of the lower dielectric layer; the radiation unit comprises a ring resonator, the fluctuation influence of the voltage standing wave ratio can be reduced, and the stability of signal transmission is improved.

Description

Technical Field

[0001] The invention relates to the technical field of microwave antennas, and in particular to a magnetic current-fed broadband dual-polarized microstrip array radio frequency antenna. Background Art

[0002] With the rapid development of wireless communication technology and demand, people pay more attention to wireless communication systems with faster communication speed, higher stability and wider communication bandwidth. Antennas, as key components that determine the performance of wireless systems, play a vital role. Microstrip patch antennas usually have narrow bandwidth, which limits their use in broadband communications, especially when multiple signal frequency bands need to be processed. They are not flexible enough. Secondly, microstrip patch antennas are prone to mutual coupling effects in dense antenna arrays, which will lead to a decrease in communication capacity and an increase in signal interference, thus affecting the overall performance of the system. In addition, traditional microstrip patch antennas usually have a single polarization direction, which cannot meet the various complex communication environment requirements in modern communication systems with multi-polarization requirements. Therefore, in order to improve the performance of microstrip patch antennas, researchers have focused on improving bandwidth, reducing mutual coupling effects, and achieving multi-polarization in recent years. A lot of research and optimization have been carried out.

[0003] In order to meet the demand for high gain in line-of-sight communication scenarios such as satellite communications, base stations, and outdoor customer equipment, researchers have proposed many technologies to enhance antenna directivity. Among them, array antennas are widely used as a conventional method to improve antenna gain. According to different feeding methods, array antennas can be divided into two types: series-fed arrays and parallel-fed arrays. In contrast, series-fed arrays have the advantages of simple feeding network structure, low line loss, and compact size. However, series-fed arrays usually have a narrow operating frequency band. Due to the use of a common feeder, when the signal is transmitted from one unit to another, the input signal of the linear array needs to pass through multiple antenna units. This multiple reflection and transmission process will cause uncertainty in signal transmission, thereby increasing transmission loss. Therefore, series-fed arrays usually exhibit narrow bandwidth characteristics.

[0004] The invention patent with application number 2022103695219 discloses a substrate integrated cavity radiating antenna using serial magnetic current feeding to solve the problem of narrow bandwidth of existing serially fed cavity radiating antennas. The present invention adopts a magnetic current serial feeding structure. While the electromagnetic energy is radiated in the outer normal direction of the metal radiation patch, it is coupled to the substrate integrated cavity (air cavity). The electromagnetic energy forms an equivalent magnetic current in the open boundary of the substrate integrated cavity. The equivalent magnetic current is consistent with the magnetic current direction of the magnetic current antenna array. Therefore, the radiation energy of the upper and lower radiators is superimposed in the far field, and together constitutes the radiation of the entire antenna.

[0005] Compared with the single resonant mode of the traditional cavity radiating antenna, the above-mentioned technology achieves the expansion of impedance bandwidth through the superposition of two modes; it can significantly improve the impedance bandwidth of the series-fed array cavity radiating antenna without increasing the antenna aperture size, and the structure is simple and easy to realize industrial production. However, due to the complexity of the array structure and the interaction between each unit, the voltage standing wave ratio (VSWR) may be significantly affected, and the above-mentioned technology uses the upper, middle and lower three-layer dielectric layer method to optimize the impedance matching of the antenna, which will have some loss in transmission efficiency. Now a technology is needed to reduce the fluctuation of the voltage standing wave ratio and optimize the impedance matching of the antenna. Summary of the invention

[0006] The present invention provides a magnetic current-fed broadband dual-polarized microstrip array radio frequency antenna, which can reduce the influence of voltage standing wave ratio fluctuations and optimize the impedance matching of the antenna.

[0007] In order to solve the above technical problems, this application provides the following technical solutions: A magnetic current fed broadband dual-polarized microstrip array radio frequency antenna, comprising: Upper dielectric layer: the upper and lower surfaces of the upper dielectric layer are respectively bonded with metal layers; Lower dielectric layer: the upper and lower surfaces of the lower dielectric layer are respectively bonded with metal layers; the metal layer on the lower surface of the upper dielectric layer is bonded with the metal layer on the upper surface of the lower dielectric layer; the upper dielectric layer and the lower dielectric layer are detachably connected; Air cavity: opened between the upper dielectric layer and the lower dielectric layer; A plurality of input ports: the contact ends of the input ports are arranged on the upper metal surface of the upper dielectric layer, and the access ends of the input ports extend out of the lower metal surface of the lower dielectric layer; A plurality of coupling gaps: provided on the lower surface metal layer of the upper dielectric layer and the upper surface metal layer of the lower dielectric layer; The upper surface metal layer of the upper dielectric layer is a series magnetic current antenna array, and the radiating units of the antenna array are connected by a feeding network; the radiating units include a ring resonator, and the feeding structure of the ring resonator is coupled to the upper surface metal layer of the upper dielectric layer and the lower surface metal layer of the upper dielectric layer, and the upper and lower surface metal layers of the upper dielectric layer are connected by a short-circuit through hole; The coupling slot is located below the serial magnetic current antenna array and on the central axis of the air cavity; the coupling slot corresponds to the radiation unit of the antenna array; Coaxial feed probe: cooperates with the input port to transmit antenna signals.

[0008] The basic principles and beneficial effects of this program: The upper and lower dielectric layers of the antenna are respectively attached to the metal layers, and cooperate with the air cavity and the coupling gap through a detachable connection to form a series magnetic current antenna array.

[0009] In the broadband slant-polarized antenna array with series magnetic current feeding, electromagnetic energy is transmitted through the coaxial feeding probe to the series magnetic current antenna array to form magnetic current radiation, and at the same time, the lower surface metal layer of the upper dielectric layer and the upper surface metal layer of the lower dielectric layer are excited through the coupling gap. The electromagnetic energy forms an equivalent magnetic current around the gap. The formed equivalent magnetic current is consistent with the magnetic current radiation direction of the series magnetic current antenna array. The two are superimposed to form the effective radiation of the antenna, thereby generating new frequency points and expanding the bandwidth.

[0010] The signal of this scheme is transmitted to the antenna through a coaxial feeding probe. The coaxial feeding probe cooperates with the input port. The signal is transmitted to the ring resonator through the feeding network, and then coupled to the lower surface metal layer of the upper dielectric layer through the ring resonator, and then coupled to the upper surface metal layer of the lower dielectric layer through the coupling gap; the ring resonator, the lower surface metal layer of the upper dielectric layer and the upper surface metal layer of the lower dielectric layer together constitute the radiation unit of the antenna of this scheme, which expands the bandwidth. The direct contact of the two metal layers reduces energy loss and improves transmission efficiency. The impedance matching is optimized through the cooperation of the ring resonator and the feeding network, that is, an additional dielectric layer is no longer required to optimize the impedance matching, and the design requirements can be met.

[0011] By interconnecting the radiating element and the conductive strip, the adverse effect of the out-of-phase current on the radiation pattern is effectively suppressed, thereby significantly improving the wide-side directivity of the antenna. The design constructs a ring resonator by slotting the microstrip line, introduces a new resonant frequency band, and combines the design of the feeding network to finally realize the radiation mode of the microstrip structure, making the entire structure equivalent to the magnetic current feeding array. At the same time, the magnetic current feeding technology successfully excites the side microstrip patch antenna through the coupling slot. The equivalent magnetic current is consistent with the magnetic current direction of the magnetic current antenna array. Therefore, the radiation energy of the upper and lower radiators is superimposed in the far field and together constitutes the radiation of the entire antenna. The wide working bandwidth of the series-fed array is achieved by integrating the fundamental mode of the side-shorted microstrip patch antenna element and the additional radiation mode introduced by the microstrip feeding structure. Based on the above design concept, the present invention realizes and tests a three-unit linear array with center feeding. The test results show that the impedance bandwidth of the system is 3~6 GHz (bandwidth 67%), and the standing wave ratio is as low as 1.0074, with the advantages of simple structure and low loss. This antenna design is particularly suitable for applications that require high directivity and dual polarization, such as 5G communications, satellite communications, radar systems, etc. These applications require efficient signal transmission and reception in complex environments.

[0012] Furthermore, electromagnetic energy is transmitted through the coaxial feeding probe to the series magnetic current antenna array to form magnetic current radiation, and at the same time, the metal layer on the lower surface of the upper medium and the metal layer on the upper surface of the lower medium are excited through the coupling gap. The electromagnetic energy forms an equivalent magnetic current around the gap, and the formed equivalent magnetic current is consistent with the magnetic current radiation direction of the series magnetic current antenna array.

[0013] Beneficial effect: The superposition of the two forms the effective radiation of the antenna, thereby generating new frequency points and expanding the bandwidth.

[0014] Furthermore, the antenna array operates at 3-6 GHz; the resistance of the feeding network is 50 ohms.

[0015] Furthermore, a plurality of suppression grooves are formed on the lower surface metal layer of the upper dielectric layer and the upper surface metal layer of the lower dielectric layer.

[0016] Beneficial effect: Reduce the impact of coaxial line on overall radiation.

[0017] Furthermore, screw holes for fixing are provided on the upper dielectric layer, the lower dielectric layer and the upper and lower metal layers.

[0018] Beneficial effects: The selection of screw hole size and position plays an important role in the propagation mode of surface waves. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 An exploded schematic diagram of a magnetic current-fed broadband dual-polarized microstrip array RF antenna; Figure 2 The figures are the radiation patterns of a magnetic current-fed broadband dual-polarized microstrip array RF antenna in an embodiment of the present invention at 3.8 GHz, 4.5 GHz, and 5.2 GHz frequencies, respectively, where (a) is the 3.8 GHz radiation pattern, (b) is the 4.5 GHz radiation pattern, and (c) is the 5.2 GHz radiation pattern.

[0020] Figure 3 This is a port S11 curve of a magnetic current-fed broadband dual-polarization microstrip array RF antenna in an embodiment of the present invention.

[0021] Figure 4 VSWR curve of a magnetic current-fed broadband dual-polarized microstrip array RF antenna in an embodiment of the present invention; Figure 5 1 is a gain curve of a magnetic current-fed broadband dual-polarized microstrip array radio frequency antenna in an embodiment of the present invention; Figure 6 An isolation curve of a magnetic current-fed broadband dual-polarized microstrip array RF antenna in an embodiment of the present invention; Figure 7 The electric field distribution diagram and current distribution diagram of each part of a magnetic current fed broadband dual-polarized microstrip array RF antenna in an embodiment of the present invention, wherein (a) is the electric field distribution of the upper surface metal layer of the upper dielectric layer, (b) is the electric field distribution of the lower surface metal layer of the upper dielectric layer and the upper surface metal layer of the lower dielectric layer, and (c) is the current distribution diagram of the upper surface metal layer of the upper dielectric layer. DETAILED DESCRIPTION

[0022] The following is further described in detail through specific implementation methods: The marks in the drawings of the specification include: upper dielectric layer 1, lower dielectric layer 2, upper dielectric upper surface metal layer 31, upper dielectric lower surface metal layer 32, lower dielectric upper surface metal layer 33, lower dielectric lower surface metal layer 34, ring resonator 4, feeding network 5, input port 6, coupling gap 7, air cavity 8, suppression groove 81, screw hole 9, and short-circuit through hole 10.

[0023] Embodiment 1 In order to solve the problem of narrow bandwidth of existing series-fed cavity radiating antennas, this scheme proposes a broadband dual-polarized series-fed microstrip patch antenna array based on magnetic current feeding technology. While realizing the radiation of the series-fed magnetic current antenna array, the present invention couples the backward radiated energy to the back of the radiating patch to excite the metal layer below, and the metal layer also acts as a radiator to radiate electromagnetic waves into space. The magnetic current series feeding structure introduces a new radiation resonance point, which expands the radiation bandwidth of the antenna array. At the same time, the design of the feeding network introduces a new polarization direction, which provides a novel idea for the design of broadband series-fed dual-polarized antenna arrays.

[0024] As attached Figure 1 As shown, a magnetic current fed broadband dual-polarized microstrip array radio frequency antenna comprises: Upper dielectric layer 1: The upper and lower surfaces of the upper dielectric layer 1 are respectively bonded with metal layers, which are the upper dielectric upper surface metal layer 31 and the upper dielectric lower surface metal layer 32; Lower dielectric layer 2: The upper and lower surfaces of the lower dielectric layer 2 are respectively bonded with metal layers, namely, a lower dielectric upper surface metal layer 33 and a lower dielectric lower surface metal layer 34; the upper dielectric lower surface metal layer 32 is bonded with the lower dielectric upper surface metal layer 33; the upper dielectric layer 1 and the lower dielectric layer 2 are detachably connected; Air cavity 8: opened between the upper dielectric layer 1 and the lower dielectric layer 2; A plurality of input ports 6: the contact end of the input port 6 is provided with the metal layer 31 on the upper surface of the upper dielectric layer, and the access end of the input port 6 extends out of the metal layer on the lower surface of the lower dielectric layer; Coaxial feeding probe: cooperates with input port 6 and is used for antenna signal transmission. That is, the feeding probe is inserted through the access end of the input port 6 located on the metal layer 34 on the lower surface of the lower dielectric until it abuts against the metal layer 31 on the upper surface of the upper dielectric, completing the cooperation between the feeding probe and the input port 6.

[0025] A plurality of coupling gaps 7: opened on the lower surface metal layer of the upper dielectric layer 1 and the upper surface metal layer of the lower dielectric layer 2; As attached Figure 1As shown, the upper surface metal layer of the upper dielectric is a series magnetic current antenna array, and the radiating units of the antenna array are connected by a feeding network 5; the radiating unit includes a ring resonator 4, and the feeding structure of the ring resonator 4 is distributed on the upper surface metal layer of the upper dielectric layer 1 and the lower surface metal layer of the upper dielectric layer 1, and the upper and lower surface metal layers of the upper dielectric layer 1 are connected by a short-circuit through hole 10; that is, the upper surface metal layer of the upper dielectric layer 1 is composed of two symmetrically arranged ring resonators 4 and a metal sheet between the two ring resonators 4, and the metal sheet, the ring resonator 4, and the lower surface metal layer of the upper dielectric are sequentially connected in series through the feeding network 5.

[0026] The coupling slot 7 is located below the serial magnetic current antenna array and on the central axis of the air cavity 8; the coupling slot 7 corresponds to the radiation unit of the antenna array; The electromagnetic energy is transmitted through the coaxial feeding probe to the serial magnetic current antenna array to form magnetic current radiation, and at the same time, the metal layer 32 on the lower surface of the upper medium and the metal layer 33 on the upper surface of the lower medium are excited through the coupling gap 7. The electromagnetic energy forms an equivalent magnetic current around the gap, and the formed equivalent magnetic current is consistent with the magnetic current radiation direction of the serial magnetic current antenna array.

[0027] The antenna array operates at 3-6 GHz; the resistance of the feeding network 5 is 50 ohms.

[0028] The upper dielectric layer 1 and the lower dielectric layer 2 and the upper and lower metal layers are provided with screw holes 9 for fixing. In this solution, 2 rows and 6 columns of 12 screw holes 9 are arranged at intervals.

[0029] In the specific implementation manner of the present invention, the lower dielectric layer 2 adopts a F4BM plate with a thickness of 3.9 mm (dielectric constant of 2.65), and the upper dielectric layer 1 adopts a F4BM plate with a thickness of 0.76 mm (dielectric constant of 2.65); the width of the radiation unit (rectangular patch) in the series magnetic current antenna array is 31.5 mm, and the length is 31.5 mm, and the radius of the annular groove is 8 mm, 10 mm, 13 mm, and 15 mm from large to small, respectively, and a total of radiation units are arranged in the series magnetic current antenna array; the feeding slot 11 is 15.75 mm long and 3 mm wide; the metal layer 32 on the lower surface of the upper dielectric is 170 mm long and 80 mm wide, and the metal layer 33 on the upper surface of the lower dielectric is 170 mm long and 80 mm wide, so that the electromagnetic energy fed through the feeding slot is effectively radiated.

[0030] As attached Figure 7 As shown. The results show that the electromagnetic radiation of the metal layer on the upper surface of the upper dielectric layer is mainly concentrated in the central area with a strong electric field intensity. The electromagnetic radiation of the metal layer on the lower surface of the upper dielectric layer is mainly concentrated in the slot area of ​​the ring resonator and along the edge of the central slot. Figure 7As shown, the equivalent magnetic current along the x-axis is also demonstrated. The in-phase current portion in the quarter-wavelength cavity can be arranged along the y-axis. When fed from one port, the current on the strip is orthogonal to the current at the center of the patch surface; when fed from the opposite port, the overall current direction is reversed, maintaining orthogonal alignment. Compared with the traditional series-fed microstrip patch antenna array, the two ±45 feeding ports in this design produce two mutually perpendicular slanted polarized radiations, thereby achieving dual polarization.

[0031] The broadband dual-polarization series-fed microstrip patch antenna array based on magnetic current feeding technology is simulated and tested. Figure 2 The figure shows the directional patterns of the broadband dual-polarized series-fed microstrip patch antenna array based on the magnetic current feeding technology in the embodiment of the present invention at 3.8 GHz, 4.5 GHz, and 5.2 GHz, respectively. (a) is the 3.8 GHz directional pattern, (b) is the 4.5 GHz directional pattern, and (c) is the 5.2 GHz directional pattern. It can be seen from the directional patterns that the antenna has good directivity. Figure 3 The S11 curve of the antenna is shown in Figure 1. The curve shows a good reflection coefficient. It can be clearly seen from the figure that the antenna has three resonant frequencies. Compared with the traditional series-fed microstrip patch antenna array, the bandwidth is greatly improved, and the relative bandwidth reaches 66.7%. Figure 4 As shown in the figure, the lowest point of the standing wave ratio is 1.007 at 3.81GHz, achieving good impedance matching. Figure 5 As shown in Figure 1, it can also be seen from the gain curve at this point that the antenna has a maximum gain bandwidth of 14.5 dB. Figure 6 As shown, the optimal isolation parameter between each port is -50 dB. This indicates that the broadband dual-polarization serially fed microstrip patch antenna array based on magnetic current feeding technology of the present invention has good broadband and high gain characteristics as well as high isolation and low standing wave ratio.

[0032] The signal of this scheme is transmitted to the antenna through a coaxial feeding probe. The coaxial feeding probe cooperates with the input port. The signal is transmitted to the ring resonator through the feeding network, and then coupled to the lower surface metal layer of the upper dielectric layer through the ring resonator, and then coupled to the upper surface metal layer of the lower dielectric layer through the coupling gap; the ring resonator, the lower surface metal layer of the upper dielectric layer and the upper surface metal layer of the lower dielectric layer together constitute the radiation unit of the antenna of this scheme, which expands the bandwidth. The direct contact of the two metal layers reduces energy loss and improves transmission efficiency. The impedance matching is optimized through the cooperation of the ring resonator and the feeding network, that is, an additional dielectric layer is no longer required to optimize the impedance matching, and the design requirements can be met.

[0033] Embodiment 2 The difference between the second embodiment and the first embodiment is that: there are four input ports 6; a plurality of suppression grooves 81 are provided on the lower surface metal layer of the upper dielectric layer 1 and the upper surface metal layer of the lower dielectric layer 2. The suppression groove 81 is a part of the air cavity 8, that is, the air cavity 8 is a groove on the lower bottom surface of the upper dielectric layer 1 and the upper top surface of the lower dielectric layer 2, and then the suppression groove 81 is combined to form the air cavity 8. That is, the coaxial feeding probe is inserted from the access end of the input port 6, and does not directly contact the lower dielectric upper surface metal layer 33 and the upper dielectric lower surface metal layer 32 in the process of reaching the contact end, thereby reducing the influence of the coaxial line on the overall radiation. The signal transmission process can only be transmitted through the coaxial feeding probe to the upper dielectric upper surface metal layer 31, and then transmitted to the ring resonator 4 through the feeding network 5, and then coupled through the ring resonator 4 to reach the lower surface metal layer of the upper dielectric layer 1 and the upper surface metal layer of the lower dielectric layer 2. Since the suppression groove 81 is provided on the metal layer on the lower surface of the upper dielectric layer 1 and the metal layer on the upper surface of the lower dielectric layer 2, compared with the signal transmission of the whole metal layer without the suppression groove 81, as shown in the attached Figure 7 As shown in (b), this solution can realize multi-strand transmission of signals on the metal plate, reduce losses, improve transmission efficiency, and maintain high radiation efficiency. The metal layer of the suppression slot 81 is added as a radiation unit, which can also achieve heat dissipation during high-power signal transmission, reducing the impact of temperature on signal transmission. At the same time, since the two metal layers as part of the radiation unit are not in direct contact with the coaxial feeding probe, even if the metal layer generates heat during signal transmission, it will not directly act on the coaxial feeding probe, which ensures the stability of signal input.

[0034] The above are only embodiments of the present invention. The invention is not limited to the fields involved in this implementation case. The common sense such as the known specific structures and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field to which the invention belongs before the application date or the priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to explain the content of the claims.

Claims

1. A magnetic current fed broadband dual-polarized microstrip array radio frequency antenna, characterized in that: include: Upper dielectric layer: the upper and lower surfaces of the upper dielectric layer are respectively bonded with metal layers; Lower dielectric layer: the upper and lower surfaces of the lower dielectric layer are respectively bonded with metal layers; the metal layer on the lower surface of the upper dielectric layer is bonded with the metal layer on the upper surface of the lower dielectric layer; the upper dielectric layer and the lower dielectric layer are detachably connected; Air cavity: opened between the upper dielectric layer and the lower dielectric layer; A plurality of input ports: the contact ends of the input ports are arranged on the upper metal surface of the upper dielectric layer, and the access ends of the input ports extend out of the lower metal surface of the lower dielectric layer; A plurality of coupling gaps: provided on the lower surface metal layer of the upper dielectric layer and the upper surface metal layer of the lower dielectric layer; The upper surface metal layer of the upper dielectric layer is a series magnetic current antenna array, and the radiation units of the antenna array are connected by a feeding network; The radiation unit includes a ring resonator, the feeding structure of the ring resonator is coupled to the upper surface metal layer of the upper dielectric layer and the lower surface metal layer of the upper dielectric layer, and the upper and lower surface metal layers of the upper dielectric layer are connected by a short-circuit through hole; The coupling slot is located below the serial magnetic current antenna array and on the central axis of the air cavity; the coupling slot corresponds to the radiation unit of the antenna array; Coaxial feed probe: cooperates with the input port to transmit antenna signals.

2. The magnetic current fed broadband dual-polarized microstrip array RF antenna according to claim 1, characterized in that: The electromagnetic energy is transmitted through the coaxial feeding probe to the series magnetic current antenna array to form magnetic current radiation, and at the same time, the metal layer on the lower surface of the upper medium and the metal layer on the upper surface of the lower medium are excited through the coupling gap. The electromagnetic energy forms an equivalent magnetic current around the gap, and the formed equivalent magnetic current is consistent with the magnetic current radiation direction of the series magnetic current antenna array.

3. The magnetic current fed broadband dual-polarized microstrip array RF antenna according to claim 1, characterized in that: The antenna array operates at 3-6 GHz; the resistance of the feeding network is 50 ohms.

4. The magnetic current fed broadband dual-polarized microstrip array RF antenna according to claim 1, characterized in that: A plurality of suppression grooves are formed on the lower surface metal layer of the upper dielectric layer and the upper surface metal layer of the lower dielectric layer.

5. The magnetic current fed broadband dual-polarized microstrip array RF antenna according to claim 1, characterized in that: The upper dielectric layer, the lower dielectric layer and the upper and lower metal layers are provided with screw holes for fixing.

Images