A magnetic current fed broadband dual-polarized microstrip array RF antenna

Abstract

The present 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, comprising: an upper dielectric layer, wherein the upper and lower surfaces of the upper dielectric layer are respectively laminated with metal layers; a lower dielectric layer, wherein the upper and lower surfaces of the lower dielectric layer are respectively laminated with metal layers; the metal layer on the lower surface of the upper dielectric layer is laminated 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; an air cavity, which is provided between the upper dielectric layer and the lower dielectric layer; a plurality of input ports, wherein the contact ends of the input ports are provided 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 slots, which are provided on the lower metal layer of the upper dielectric layer and the upper metal layer of the lower dielectric layer; and a radiation unit, which comprises a ring resonator, which can reduce the influence of fluctuations in the voltage standing wave ratio and improve the stability of signal transmission.

Description

Technical Field

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

[0002] With the rapid development of wireless communication technology and demand, people are paying more attention to wireless communication systems with faster communication speeds, higher stability, and wider communication bandwidths. Antennas, as key components that determine the performance of wireless systems, play a vital role. Microstrip patch antennas typically have narrow bandwidths, which limits their use in broadband communications, especially when processing multiple signal frequency bands. They are not flexible enough. Secondly, microstrip patch antennas are prone to mutual coupling effects in dense antenna arrays, which can lead to reduced communication capacity and increased signal interference, thus affecting the overall performance of the system. In addition, traditional microstrip patch antennas typically have a single polarization direction, which cannot meet the various complex communication environment requirements of modern communication systems with multi-polarization requirements. Therefore, in order to improve the performance of microstrip patch antennas, researchers have conducted extensive research and optimization in recent years, focusing on increasing bandwidth, reducing mutual coupling effects, and achieving multi-polarization.

[0003] To meet the demand for high gain in line-of-sight communication scenarios such as satellite communications, base stations, and outdoor client equipment, researchers have proposed many technologies to enhance antenna directivity. Among them, array antennas, as a conventional method, are widely used to improve antenna gain. Depending on the feeding method, array antennas can be divided into two types: series-fed arrays and parallel-fed arrays. In contrast, series-fed arrays have advantages such as a simple feeding network structure, low line loss, and compact size. However, series-fed arrays typically 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 lead to uncertainty in signal transmission, thereby increasing transmission loss. Therefore, series-fed arrays typically exhibit narrow bandwidth characteristics.

[0004] Patent application number 2022103695219 discloses a substrate-integrated cavity radiating antenna using serial magnetic current feeding, addressing the narrow bandwidth of existing serially fed cavity radiating antennas. This invention utilizes a serial magnetic current feeding structure, where electromagnetic energy is simultaneously radiated in the outward normal direction of the metal radiating patch and coupled into the substrate-integrated cavity (air cavity). This electromagnetic energy forms an equivalent magnetic flux within the open boundary of the substrate-integrated cavity, which aligns with the magnetic flux of the magnetic current antenna array. Consequently, the radiation energy of the upper and lower radiators superimposes in the far field, contributing to the overall antenna radiation.

[0005] Compared to the single resonant mode of traditional cavity radiating antennas, the above-mentioned technology achieves an expansion of the impedance bandwidth through the superposition of two modes. It can significantly improve the impedance bandwidth of series-fed array cavity radiating antennas without increasing the antenna aperture size, and its simple structure makes it easy to industrialize. However, due to the complexity of the array structure and the interaction between the individual elements, the voltage standing wave ratio (VSWR) may be significantly affected. Moreover, the above-mentioned technology uses a three-layer dielectric method of top, middle and bottom to optimize the antenna's impedance matching, which will result in a loss in transmission efficiency. A technology is currently needed to reduce the impact of VSWR fluctuations and optimize the antenna's impedance matching. 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:

[0008] A magnetic current-fed broadband dual-polarized microstrip array radio frequency antenna, comprising:

[0009] Upper dielectric layer: The upper and lower surfaces of the upper dielectric layer are respectively bonded with metal layers;

[0010] 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 to the metal layer on the upper surface of the lower dielectric layer; the upper dielectric layer and the lower dielectric layer are detachably connected;

[0011] Air cavity: opened between the upper dielectric layer and the lower dielectric layer;

[0012] A plurality of input ports: contact ends of the input ports are arranged on the upper metal surface of the upper dielectric layer, and access ends of the input ports extend out of the lower metal surface of the lower dielectric layer;

[0013] A plurality of coupling slots: provided on the lower surface metal layer of the upper dielectric layer and the upper surface metal layer of the lower dielectric layer;

[0014] The upper surface metal layer of the upper dielectric layer is a series magnetic current antenna array, and the radiating elements of the antenna array are connected by a feeding network; the radiating elements 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;

[0015] 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 element of the antenna array;

[0016] Coaxial feed probe: used in conjunction with the input port for antenna signal transmission.

[0017] The basic principles and beneficial effects of this program:

[0018] The upper and lower dielectric layers of the antenna are respectively adhered to the metal layer and cooperate with the air cavity and coupling gap through detachable connections to form a series magnetic current antenna array.

[0019] In the broadband slant-polarized antenna array fed by series magnetic current, electromagnetic energy passes through the coaxial feeding probe to the series magnetic current antenna array to form magnetic current radiation, and at the same time excites the metal layer on the lower surface of the upper dielectric and the metal layer on the upper surface of the lower dielectric layer 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.

[0020] The signal of this solution is transmitted to the antenna through a coaxial feeding probe. The coaxial feeding probe cooperates with the input port, and the signal is transmitted to the ring resonator through the feeding network. Then, it is 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 solution, which expands the bandwidth. The direct contact between the two metal layers reduces energy loss and improves transmission efficiency. The impedance matching is optimized through the cooperation between 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.

[0021] By interconnecting the radiating elements and conductive strips, the adverse effects of out-of-phase currents on the radiation pattern are effectively suppressed, significantly improving the antenna's wide-band directivity. This design constructs a ring resonator by slotting the microstrip line, introducing a new resonant frequency band. Combined with the design of the feed network, this ultimately achieves a radiation pattern within the microstrip structure, making the entire structure equivalent to a magnetic current-fed array. Furthermore, the magnetic current-fed technology successfully excites the side microstrip patch antenna through the coupling slots. This equivalent magnetic current aligns with the direction of the magnetic current in the magnetic current antenna array, resulting in the radiation energy of the upper and lower radiators superimposed in the far field, contributing to the overall antenna radiation. The wide operating bandwidth of the series-fed array is achieved by integrating the fundamental mode of the side-shorted microstrip patch antenna elements with the additional radiation mode introduced by the microstrip feed structure. Based on this design concept, the present invention implemented and tested a three-element linear array with center feeding. Test results show that the system has an impedance bandwidth of 3–6 GHz (67% bandwidth) and a standing wave ratio as low as 1.0074, demonstrating its 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.

[0022] Furthermore, the electromagnetic energy is fed through the coaxial 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.

[0023] Beneficial effect: The superposition of the two forms effective radiation of the antenna, thereby generating new frequency points and expanding the bandwidth.

[0024] Furthermore, the antenna array operates at 3-6 GHz; the resistance of the feeding network is 50 ohms.

[0025] 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.

[0026] Beneficial effect: Reduce the impact of coaxial line on overall radiation.

[0027] Furthermore, screw holes for fixing are provided on the upper dielectric layer, the lower dielectric layer, and the upper and lower metal layers.

[0028] 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

[0029] Figure 1 The exploded diagram of a magnetic current-fed broadband dual-polarized microstrip array RF antenna;

[0030] Figure 2 These are the directional 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, 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.

[0031] 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.

[0032] Figure 4 VSWR curve of a magnetic current-fed broadband dual-polarized microstrip array RF antenna according to an embodiment of the present invention;

[0033] Figure 5 1 is a gain curve of a magnetic current-fed broadband dual-polarized microstrip array RF antenna according to an embodiment of the present invention;

[0034] Figure 6 1 is an isolation curve of a magnetic current-fed broadband dual-polarized microstrip array RF antenna according to an embodiment of the present invention;

[0035] Figure 7 Figures 2 and 3 show the electric field distribution diagrams and current distribution diagrams of various parts of a magnetic current-fed broadband dual-polarized microstrip array RF antenna in an embodiment of the present invention, where (a) shows the electric field distribution of the upper surface metal layer of the upper dielectric layer, (b) shows 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) shows the current distribution diagram of the upper surface metal layer of the upper dielectric layer. DETAILED DESCRIPTION

[0036] The following is further described in detail through specific implementation methods:

[0037] The symbols 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.

[0038] Example 1

[0039] This solution addresses the problem of narrow bandwidth of existing series-fed cavity radiating antennas and 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, exciting the metal layer underneath, 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 a broadband series-fed dual-polarized antenna array.

[0040] As attached Figure 1 As shown, a magnetic current fed broadband dual-polarized microstrip array RF antenna comprises:

[0041] Upper dielectric layer 1: The upper and lower surfaces of the upper dielectric layer 1 are respectively bonded with metal layers, namely, upper dielectric upper surface metal layer 31 and upper dielectric lower surface metal layer 32;

[0042] Lower dielectric layer 2: The upper and lower surfaces of the lower dielectric layer 2 are respectively bonded with metal layers, namely, lower dielectric upper surface metal layer 33 and lower dielectric lower surface metal layer 34; the upper dielectric lower surface metal layer 32 is bonded to the lower dielectric upper surface metal layer 33; the upper dielectric layer 1 and the lower dielectric layer 2 are detachably connected;

[0043] Air cavity 8: opened between the upper dielectric layer 1 and the lower dielectric layer 2;

[0044] Several input ports 6: the contact end of the input port 6 is provided with the upper surface metal layer 31 of the upper dielectric layer, and the access end of the input port 6 extends out of the lower surface metal layer of the lower dielectric layer;

[0045] Coaxial feed probe: Mate with input port 6 for antenna signal transmission. The feed probe is inserted through the input port 6's access end, located on the lower surface metal layer 34 of the lower dielectric layer, until it contacts the upper surface metal layer 31 of the upper dielectric layer, completing the mating of the feed probe and input port 6.

[0046] A plurality of coupling gaps 7 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;

[0047] 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. 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. 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.

[0048] 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 element of the antenna array;

[0049] The electromagnetic energy is fed through the coaxial probe to the series 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 series magnetic current antenna array.

[0050] The antenna array operates at 3-6 GHz; the resistance of the feed network 5 is 50 ohms.

[0051] 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, 12 screw holes 9 are arranged in 2 rows and 6 columns at intervals.

[0052] In the specific embodiment 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 radiating unit (rectangular patch) in the series magnetic current antenna array has a width of 31.5 mm and a length of 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. A total of radiating units are provided 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.

[0053] 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 7The equivalent magnetic current along the x-axis is also demonstrated. The in-phase current portion of the quarter-wavelength cavity can be arranged along the y-axis. When fed from one port, the current in the strip is orthogonal to the current at the center of the patch surface; when fed from the opposite port, the overall current direction reverses, maintaining orthogonal alignment. Compared to traditional series-fed microstrip patch antenna arrays, the two ±45° feed ports in this design generate two mutually perpendicular skew polarizations, thus achieving dual polarization.

[0054] The broadband dual-polarization serially fed microstrip patch antenna array based on magnetic current feeding technology is simulated and tested. Figure 2 The figures show the directional patterns of the broadband dual-polarized serially fed microstrip patch antenna array based on magnetic current feeding technology at 3.8 GHz, 4.5 GHz, and 5.2 GHz, respectively, in an embodiment of the present invention. (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. 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, the lowest point of the standing wave ratio is 1.007 at 3.81GHz, achieving good impedance matching. Figure 5 As shown in Figure 2, it can also be seen from the gain curve at this point that the antenna has a maximum gain bandwidth of 14.5dB. Figure 6 As shown, the optimal isolation parameter between each port is -50dB, indicating that the broadband dual-polarized 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.

[0055] The signal of this solution is transmitted to the antenna through a coaxial feeding probe. The coaxial feeding probe cooperates with the input port, and the signal is transmitted to the ring resonator through the feeding network. Then, it is 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 solution, which expands the bandwidth. The direct contact between the two metal layers reduces energy loss and improves transmission efficiency. The impedance matching is optimized through the cooperation between 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.

[0056] Example 2

[0057] The difference between Example 2 and Example 1 is that: there are four input ports 6; and a plurality of suppression grooves 81 are formed 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 grooves 81 are part of the air cavity 8, that is, the air cavity 8 is formed by the grooves formed on the lower bottom surface of the upper dielectric layer 1 and the grooves formed on the upper top surface of the lower dielectric layer 2, and then the suppression grooves 81 are combined to form the air cavity 8. That is, the coaxial feeding probe is inserted from the access end of the input port 6 until it reaches the contact end, without directly contacting the lower dielectric upper surface metal layer 33 and the upper dielectric lower surface metal layer 32, thereby reducing the influence of the coaxial line on the overall radiation. The signal transmission process can only pass through the coaxial feeding probe, transmitted 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 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 are provided with the suppression groove 81, compared with the signal transmission of the whole metal layer without the suppression groove 81, as shown in the attached figure, Figure 7 As shown in (b), this solution enables multi-strand signal transmission across the metal plate, reducing losses, improving transmission efficiency, and maintaining high radiation efficiency. Furthermore, the addition of the metal layer with suppression slot 81 as a radiating element allows for heat dissipation during high-power signal transmission, reducing the impact of temperature on signal transmission. Furthermore, because the two metal layers forming part of the radiating element are not in direct contact with the coaxial feed probe, even if heat is generated by the metal layers during signal transmission, it will not directly affect the coaxial feed probe, thus ensuring signal input stability.

[0058] The above are only embodiments of the present invention. The invention is not limited to the fields involved in this implementation case. Common knowledge such as the known specific structures and characteristics in the scheme is not described in detail here. Ordinary technicians in the relevant field are aware of all common technical knowledge in the technical field to which the invention belongs before the application date or priority date, can obtain all existing technologies in the field, and have the ability to apply conventional experimental means before that date. Ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the inspiration 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 variations and improvements can be made, which should also be regarded as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection 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 interpret the content of the claims.

Claims

1. A magnetic current fed broadband dual-polarized microstrip array RF 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 to 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: contact ends of the input ports are arranged on the upper metal surface of the upper dielectric layer, and access ends of the input ports extend out of the lower metal surface of the lower dielectric layer; A plurality of coupling slots: provided on the lower surface metal layer of the upper dielectric layer and the upper surface metal layer of the lower dielectric layer; The metal layer on the upper surface of the upper dielectric layer is a series magnetic current antenna array, and the radiating elements of the antenna array are connected by a feed 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 element of the antenna array; Coaxial feed probe: used in conjunction with the input port for antenna signal transmission.

2. The magnetic current-fed broadband dual-polarized microstrip array RF antenna according to claim 1, characterized in that: The electromagnetic energy is fed through the coaxial 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: Screw holes for fixing are provided on the upper dielectric layer, the lower dielectric layer and the upper and lower metal layers.

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