CN116154464B - A high-temperature-resistant common-aperture wide-beam antenna - Google Patents

Abstract

The invention discloses a high-Wen Gong caliber wide-beam antenna, which comprises a common caliber end-fire antenna and a heat-proof skylight, wherein the common caliber end-fire antenna comprises an ultra-wideband wave band first antenna and a K wave band second antenna which are integrated on the same double-layer ceramic copper-clad plate and cover an S-C-X frequency band, the first antenna and the second antenna work under the same caliber, the double-layer ceramic copper-clad plate comprises an upper substrate and a lower substrate, the upper surface of the upper substrate and the lower surface of the lower substrate are both covered with copper metal surfaces, and the first antenna and the second antenna are both provided with a connected radiation structure and a feed structure.

Description

A high-temperature-resistant common-aperture wide-beam antenna

Technical field

The invention relates to the field of antenna technology, in particular to a high temperature resistant common aperture wide beam antenna.

Background technique

For high-speed aircraft, due to long-term high-speed flight, a large amount of heat is generated by friction with the airflow. The surface of the aircraft is affected by aerodynamic heating and has extremely high temperatures. Such a harsh working environment will greatly limit the normal operation of antennas installed close to the surface. Currently, for aircraft antennas with increasingly rich and complex application functional scenarios, the size of the antenna window opening structure is becoming more and more restrictive. At the same time, high-temperature-resistant antennas also need to consider directly conforming the radiation surface of the heat shield cover to the surface of the aircraft. Therefore, It has become a trend to develop high-temperature-resistant antennas that are miniaturized and conformable to high-speed aircraft. On the other hand, in the design of a rocket space-based measurement and control system integrated with telemetry, external measurement, security and control, in order to achieve multi-functional aircraft measurement and control communication covering multiple frequency bands, the traditional aircraft antenna feed layout requires multiple antenna windows on the cabin. , which has certain difficulties for both the aircraft cabin structure and the antenna layout. In the existing technology, the patent document with the publication number CN115276838A discloses a multi-task oriented remote external security integrated comprehensive measurement and control station patent that can work in different The remote antenna of the frequency band is placed in the same antenna window. However, due to the limitations of its installation structure, miniaturized multi-band co-aperture high-temperature resistant antennas, how to improve the isolation between multi-channels and achieve wide-beam performance in the case of a limited-size antenna radiation window is an urgent problem to be solved.

Due to limitations of installation space and high-temperature working environment, traditional metal antennas such as Yagi antennas, log-periodic antennas and other end-fire antennas are difficult to meet the requirements. Due to its size, it is difficult to fit in a very small space, and its weight is also difficult to meet the requirements. At the same time, metal materials have good thermal conductivity and it is difficult to achieve good thermal insulation performance. On the other hand, low-profile planar antennas can be placed on the bottom of the heat insulation. Although they are not affected by high temperatures, the complex installation environment and the limited size of the antenna window will greatly damage its electrical performance, making it difficult to design the antenna pattern.

Contents of the invention

Purpose of the invention: The present invention aims at the needs of high-speed aircraft antennas in terms of miniaturization, conformability, high temperature resistance, and multi-band, etc., and provides a common combination of ultra-wideband band antenna and K-band antenna that can cover the S-C-X frequency band under a limited radiation window. The caliber is a high-temperature-resistant wide-beam antenna and has good channel isolation performance.

A high-temperature-resistant common-aperture wide-beam antenna of the present invention includes a common-aperture end-fire antenna and a heat-proof skylight. The common-aperture end-fire antenna includes an ultra-wideband first antenna covering the S-C-X frequency band integrated on the same double-layer ceramic copper-clad board. And the K-band second antenna, the first antenna and the second antenna work at the same caliber. The double-layer ceramic copper-clad board includes an upper substrate and a lower substrate. The upper surface of the upper substrate and the lower surface of the lower substrate are both covered with copper metal. surface, the first antenna and the second antenna both have connected radiating structures and feed structures. The radiating structures are placed on the metal surfaces of the upper substrate and the lower substrate. The heat-proof skylight includes a thermal insulation layer, and the radiating structure is embedded in the thermal insulation layer. And it is located in the center of the heat-resistant skylight.

Preferably, it also includes a metal bottom plate, and the heat-proof skylight also includes a heat-proof cover plate. The heat-proof cover plate, the heat insulation layer and the metal bottom plate are stacked and fixedly connected according to the center line. The heat insulation layer has openings for embedding. The slot structure of the common-aperture end-fire antenna is that the lower part of the common-aperture end-fire antenna is installed on the metal base plate and the lower end protrudes from the bottom of the metal base plate.

Preferably, a first radio frequency connector and a second radio frequency connector are installed on the double-layer ceramic copper-clad plate below the metal base plate on the common-aperture end-fire antenna, and the double-layer ceramic copper-clad plate is fixedly connected to the metal base plate through the antenna fixed connector. .

Preferably, the radiation structure of the first antenna is a metal surface formed by two exponential gradient curves printed on the upper and lower surfaces of the double-layer ceramic copper-clad board and the edge of the double-layer ceramic copper-clad board closed along a straight line. Between the two exponential gradient curves There is a trumpet-shaped opening in between, and the first antenna radiation structure printed on the upper and lower surfaces of the double-layer ceramic copper-clad board is at the same position.

Preferably, the radiation structure of the second antenna is a right-angled trapezoidal metal surface printed on the upper surface of the double-layer ceramic copper-clad board, and the positions of the second antenna radiation structures printed on the upper surface of the double-layer ceramic copper-clad board are symmetrical to each other.

Preferably, the feed structure of the first antenna includes a first radio frequency connector, a strip line and a double-sided slot line, the first radio frequency connector and the strip line form a coaxial-strip line converter, and the strip line and a double-sided slot line to form a stripline-double-sided slot line converter. The feed structure of the second antenna includes a connected second radio frequency connector and a substrate integrated waveguide. The second radio frequency connector and the substrate integrated waveguide are connected. The waveguide constitutes a coaxial-substrate integrated waveguide converter.

Preferably, the strip line is located between the upper substrate and the lower substrate, in an inverted "L" shape, with evenly distributed metallized vias loaded on both sides. The strip line terminal is loaded with a fan-shaped structure through the transition section, and the transition section is progressive. The other end of the stripline structure is connected to the first RF connector.

Preferably, the double-sided groove line is provided on the upper surface of the upper substrate and the lower surface of the lower substrate, its front end is connected to the radiation structure of the first antenna, and the end is loaded with a sector-shaped groove.

Preferably, the coaxial-substrate integrated waveguide converter has an open end, and the open end is connected to the radiation structure of the second antenna to form an end-fire antenna.

Compared with the existing technology, the present invention has the following beneficial effects:

The present invention uses different antenna forms integrated on the same high dielectric constant ceramic substrate to reduce the size of the antenna. Through reasonable layout and feed design, it ensures that two antennas with large spans in different frequency bands can work independently in a small space. , do not interfere with each other and improve space utilization. The overall design of the antenna of the present invention uses an alumina ceramic copper-clad substrate with high temperature resistance and low thermal conductivity, so that the antenna can withstand high temperatures conducted from the heat protection layer and can effectively take into account the electrical and thermal properties. And the co-aperture antenna structure is integrated into the radome to form a new antenna form as a whole, integrating the two into one, which not only broadens the beam, but also ensures that the antenna has heat resistance and can work normally for a long time under high temperature conditions. Generally speaking, all the functions of the original radome for heat protection, signal transmission by the antenna, and shaping and bearing capacity of the outer surface of the aircraft are realized. In addition, the high-temperature radome can meet the aerodynamic performance requirements of high-speed aircraft by adopting a structural design that is conformal to the high-speed aircraft.

Description of the drawings

Figure 1 is a schematic diagram of the overall structure of the present invention;

Figure 2 is the front view of the ceramic copper-clad substrate;

Figure 3 is the back view of the ceramic copper-clad substrate;

Figure 4 is a diagram of the middle layer of the ceramic copper-clad substrate;

Figure 5 is a side view of the ceramic copper-clad substrate;

Figure 6 is the front dimension diagram of the ceramic copper-clad substrate;

Figure 7 shows the dimensions of the middle layer of the ceramic copper-clad substrate;

Figure 8 shows the side dimensions of the ceramic copper-clad substrate;

Figure 9 is the forward structural dimension diagram of the coaxial probe, that is, the RF connector;

Figure 10 is the standing wave ratio diagram of the first antenna;

Figure 11 is the standing wave ratio diagram of the second antenna;

Figure 12 shows the isolation diagram of the antenna in the low frequency part;

Figure 13 shows the isolation diagram of the antenna in the high frequency part;

Figure 14 is a simulated temperature distribution diagram of the prototype of the present invention after heating for 500 seconds;

Figure 15 is a simulated temperature distribution diagram of the prototype of the present invention after heating for 1000s;

Figure 16 is a simulated temperature distribution diagram of the prototype of the present invention after heating for 1500s;

Figure 17 is a simulated temperature distribution diagram of the prototype of the present invention after heating for 2000s;

Figure 18 shows the temperature rise curve at the top of the ceramic substrate and the temperature rise curve at the coaxial position of the feed.

Detailed ways

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

In the present invention, the multi-band high-temperature resistant common-aperture antenna is mainly composed of a common-aperture antenna and a heat-proof skylight structure, and the antenna is installed in the heat-proof skylight. The antenna has two frequency bands. The spans of different frequency bands are large, and it is necessary to ensure that the two antenna units work at the same caliber. In addition, the heat resistance of the antenna must be ensured. Considering the requirements of high-temperature resistance, multi-band and wide-band antennas, a co-aperture antenna design based on two broadband antenna units was studied. Antennas of different frequency bands are integrated on the same dielectric board, and through reasonable layout and feed structure design, different antenna units can share a radiation aperture. The first antenna and the second antenna are integrated on the same high-temperature ceramic copper-clad board for design, which satisfies the thermal performance of the antenna while reducing the overall volume of the antenna, ensuring that the two radiating antenna units of the entire antenna structure work at the same time without affecting each other. .

As shown in Figure 1, a high-temperature-resistant common-aperture antenna includes a common-aperture antenna. The common-aperture antenna includes a first antenna 1 covering the S-C-X frequency band and a second antenna 2 for the K-band integrated on the same ceramic copper-clad plate 3, that is, Radiating structure of common aperture antenna. The dielectric plates used in the high-temperature-resistant co-aperture antenna are two high-temperature-resistant alumina ceramic copper-clad plates 3 with a thickness of 0.8mm and a relative dielectric constant of 9.4. The second antenna 2 is located on the right side of the first antenna 1, the first in the ultra-wideband frequency band. Antenna 1 and K-band second antenna 2 work at the same aperture; the size of the radiation structure part of the common-aperture antenna is: 50mm*53.5mm, and the ceramic copper-clad board 3 is double-layered, including an upper substrate 301 and a lower substrate 302.

The invention integrates two frequency band antennas (two broadband antenna units) on the same substrate in a small space under the small-area heat-proof layer window, working in the same aperture and independent of each other. At the same time, the two antennas can work normally for a long time under high temperature conditions. The two frequency bands designed by the present invention have a large span. The first antenna 1 is designed to cover the S-C-X frequency band, and the second antenna 2 is designed to cover the K-band. The second antenna 2 is placed in a position that does not affect the radiation performance of the first antenna 1. Therefore, in a small installation environment, multi-band thermal antennas can work together in the same caliber without interfering with each other, achieving a good match between the required pattern and the excitation device.

In addition, as shown in Figure 8, the double-layer width W1 of the ceramic copper-clad laminate 3 is 1.6mm; the single-layer width W2 of the ceramic copper-clad laminate 3 is 0.8mm; as shown in Figure 6, the fixed through hole radius R1 of the ceramic copper-clad laminate 3 is 1mm.

Both the first antenna 1 and the second antenna 2 have a radiation structure and a feed structure. The radiation structure of the common-aperture antenna is located on the upper metal surface of the upper substrate 301 and the lower metal surface of the lower substrate 302. The feed structure and the radiation structure use the same The dielectric board is produced. Part of the feed structure of the first antenna is located between the upper substrate 301 and the lower substrate 302. In addition, the thickness of the metal layer of the ceramic copper-clad plate 3 in this embodiment is 0.018mm.

The antenna system also has a heat-proof skylight, that is, a high-temperature radome, which contains a heat insulation layer. The upper part of the common-aperture antenna, especially the radiating structure part of the antenna, is embedded in the heat insulation layer and is located in the center of the heat-proof skylight.

The antenna system includes a metal base plate 5, which is a square metal flange. The lower part of the common-aperture antenna is installed on the metal base plate 5 and its lowermost end protrudes from the bottom of the metal base plate 5. The radius of the flange plate fixing through hole R3=1.3mm .

As shown in Figure 1, the heat-proof skylight also includes a heat-proof cover plate 401. The heat-proof cover plate 401, the heat insulation layer 402 and the metal base plate 5 are stacked and fixedly connected according to the center line. The heat insulation layer 402 has openings for embedding common components. Slot structure of aperture antenna. The relative dielectric constant of the heat insulation layer 402 material is 1.4, and the relative dielectric constant of the heat protection cover 401 is 3.4.

As shown in Figures 1 and 5, two radio frequency connectors 6 are installed on the ceramic copper-clad plate 3 located below the metal base plate 5. The ceramic copper-clad plate 3 is fixedly connected to the metal base plate 5 through the antenna fixed connector 7.

As shown in Figure 3, the radiation structure of the first antenna 1 is composed of two exponential gradient curves closed along a straight line with the edge of the ceramic copper-clad plate 3. There is a trumpet-shaped opening between the two exponential curves. The upper and lower surfaces of the ceramic copper-clad plate 3 The same radiating structure is printed on the surface. The exponential curves UL1 and UL2 of the first antenna 1 are: y=±0.158exp(0.16x)±0.092.

The radiation structure of the second antenna 2 is a right-angled trapezoidal metal surface, as shown in Figure 3. Its upper surface radiating metal surface and lower surface radiating metal surface are symmetrical to each other.

On the upper and lower surfaces of the ceramic copper-clad plate 3, the metal layer portion of the first antenna as the radiation structure and the metal layer portion of the second antenna as the radiation structure are printed together at the edges. Through integrated design, the size of the antenna is reduced.

As shown in Figure 6, the total length of the antenna unit is L1=53.5mm; the total width of the antenna unit L2=50mm; the length of the second antenna L3=10mm; the width of the second antenna 2 L4=4.3mm; the second antenna 2 The width of the narrow side of the right-angled trapezoidal metal surface of the radiating structure is L5 = 1.7mm; the width of the bottom edge of the right-angled trapezoidal metal surface of the second antenna 2 radiating structure is L6 = 5.6mm; the opening distance of the first antenna 1 radiating structure is L7 = 29.95mm; the width of the slot line L8 = 0.5mm; the radiation structure length of the first antenna 1 is L9 = 29.95mm.

The feed structure of the first antenna 1 includes a radio frequency connector, a strip line and a sector structure 9 connected in sequence, and also includes a double-sided slot line structure capable of electromagnetic coupling with the strip line. The double-sided slot line structure is connected to a sector slot. Among them, the radio frequency connector and the strip line constitute the coaxial-strip line converter 101, and the strip line and the double-sided slot line structure constitute the strip line-double-sided slot line converter 102.

The feed structure of the second antenna includes a radio frequency connector and a substrate integrated waveguide 202, which together form a coaxial-to-substrate integrated waveguide converter 201.

The lower ends of the coaxial-stripline converter 101 and the stripline-double-sided slotline converter 102 are the radio frequency connectors 6 of the respective antennas.

The function of the stripline-double-sided slot line converter 102 is to convert the unbalanced transmission mode of the strip line to the balanced transmission mode of the double-sided slot line. The first antenna whose radiation structure is located on the upper and lower sides shares the radio frequency connector, strip line and sector structure 9. The strip line structure of the strip line-double-sided slot line converter 102 is located in the middle of the upper substrate 301 and the lower substrate 302, in the form of Inverted "L" shape, the ceramic copper-clad boards on both sides are loaded with evenly distributed metallized vias 8 to suppress the parallel plate waveguide mode introduced by the high dielectric constant substrate between the upper and lower metal surfaces, below the metallized vias Load the strip to avoid energy leakage and ensure the consistency of the upper and lower substrates when connecting. As shown in Figure 4, the strip line terminal is loaded with a fan-shaped structure 9. The transition section between the strip line and the fan-shaped structure 9 is a gradual step shape. Improve matching bandwidth.

As shown in Figure 7, the length of the strip line 103 is L18=14.3mm, L19=7.54mm; the radius R4 of the fan-shaped structure 9 at the end of the strip line 103=3.1mm; the radius angle θ2 of the fan-shaped structure 9 at the end of the strip line 103=130° .

As shown in Figures 2-4 and 6, the double-sided slot line structure of the stripline-double-sided slot line converter 102 is on the upper surface of the upper substrate 301 and the lower surface of the lower substrate 302, and its front end is in contact with the first antenna. The radiating section is connected, and the fan-shaped slot is loaded at the end to improve the matching bandwidth. There is no transition between the slot line and the fan-shaped slot connection. The radiating section is the radiation structure of the first antenna. In addition, the sector-shaped groove radius R2=5.09mm, and the sector-shaped radius angle θ1=110°.

As shown in Figure 6, the length of the metallized via hole 8 on the left side of the strip line 103 is L10=18.43mm; the length of the metallized via hole 8 on the right side of the strip line 103 is L11=16.15mm; the metallized via hole 8 on the top of the strip line 103 is 8 The length L12=7.6mm; the length L13=3.88mm of the metalized via hole 8 at the bottom of the strip line 103.

The coaxial-to-substrate integrated waveguide converter 201 composed of the second antenna with the radiation structure located on the upper and lower sides uses a shared RF connector and the substrate integrated waveguide 202 as the feed structure. The coaxial-to-substrate integrated waveguide converter 201 has an open end. , where the open-circuit end is connected to the radiation structure of the second antenna to form an end-fire antenna based on SIW, and the other end is connected to a radio frequency connector 6. As shown in Figure 6, the coaxial-to-substrate integrated waveguide converter 201 includes a connected substrate integrated waveguide 202 and a coaxial probe, wherein the substrate integrated waveguide 202 of the upper substrate is formed by penetrating the upper substrate 301 and its upper metal The metallized via holes 8 on the surface are symmetrically formed by the metallized via holes 8 that penetrate the lower substrate 302 and its lower metal surface to form the substrate integrated waveguide 202 of the lower substrate. Strips are loaded below the metallized via holes. The length L14 of the chip integrated waveguide 202 = 44.55mm; the width L15 of the substrate integrated waveguide 202 = 3.7mm; as shown in Figure 8, the length of the coaxial outer conductor L16 = 2.4mm; as shown in Figure 9, the diameter of the coaxial inner conductor D1 =0.64mm; inner diameter of coaxial outer conductor D2 = 2.1mm; outer diameter of coaxial outer conductor D3 = 4mm.

As shown in Figures 14 to 17, in order to verify the heat resistance of the antenna prototype, the commercial software CSTStudio Suite was used for thermal simulation testing. Among them, after external heating of 1200°C and continuous heating for 1000 seconds, the temperature distribution is shown in Figure 15. The temperature rise curve of a typical part is shown in Figure 18, which shows the temperature rise curve of the top of the ceramic substrate and the coaxial position of the feed. It can be seen that the prototype can work normally at high temperatures, slow down the transfer of heat, and reduce the temperature of the feed end. Not exceeding 150℃.

It can be seen from the above that the present invention blocks the conduction of external high temperature to the antenna feed end in the small space under the allowable small area heat protection layer, ensuring that the antenna can work normally in a high temperature environment for a long time. Two broadband antenna units are integrated in the same caliber and complete the radiation pattern shaping design. By using ceramic copper-clad laminates, the heat-bearing capacity of the antenna is improved, and the antenna is partially embedded in the heat insulation layer, which is beneficial to the integrated design with the heat-proof skylight, reducing heat conduction, and cracking the heat-proof layer to bring about the "horn effect". Achieve wide beam pattern.

The present invention can keep the feed port temperature below 150 degrees while maintaining the surface temperature at 1200 degrees for 1000 seconds. The use of planar integrated coaxial lines effectively utilizes space and reduces the impact of the surrounding environment on matching performance.

It can be seen from Figure 10 and Figure 11 that the frequency range where the standing wave ratio of the ultra-wideband antenna covering the S-C-X band is less than 2 is 2-10GHz, and the standing wave ratio of the K-band antenna is less than 2 in the range of 23-27GHz. The first antenna and the Both antennas have broadband characteristics, which are beneficial to precise guidance of high-speed aircraft, improving concealment and anti-interference capabilities. In addition, Figure 12 and Figure 13 show the isolation between ultra-wideband antennas and K-band antennas covering the S-C-X frequency band. The isolation at low frequencies is less than 60dB, while at high frequencies they are both under 20dB. The results show that for high and low frequencies The rational layout of the antennas ensures good isolation between the two antennas, and the multi-band thermal antennas can work together in the same caliber without interfering with each other.

Since the design of the present invention is electrically and thermally integrated, this antenna form has the advantages of being easy to miniaturize the antenna system, working in multiple frequency bands, conforming to the surface of the aircraft, and having the phase center close to the radiation port, thereby reducing the impact of ablation. In order to enable the antenna to withstand the high temperature transmitted from the heat-proof layer, the overall design of the antenna uses a high-temperature-resistant alumina ceramic copper-clad laminate, which can effectively take into account the electrical and thermal properties. The high dielectric constant of the substrate can also be maintained within a certain It greatly reduces the overall size of the antenna and improves space utilization, making it easier to use in small spaces.

In response to the needs of high-speed aircraft antennas in terms of miniaturization, conformability, high temperature resistance, and multi-band, the present invention conducts research on the design of a co-aperture high-temperature-resistant wide-beam antenna that can cover ultra-wideband antennas in the S-C-X frequency bands and K-band antennas. Integrating two different band Vivaldi antennas and a gradient slot end-fire antenna into the same high-dielectric-constant ceramic copper-clad board reduces the size of the antenna, effectively reduces the height of the end-fire antenna, and greatly retains the insulation thickness of the thermal insulation layer. , improved thermal insulation performance. By controlling the distance between the top of the antenna and the heat-proof cover, adjusting the beam width to obtain wide-beam performance, and further rationalizing the layout and designing the feed structure, the antenna units of different bands are located in the center of the heat-proof skylight and share a radiation aperture. In this way, while meeting the anti- and heat-insulating properties of the antenna, it can also reduce the size of the overall high-temperature-resistant antenna system, and ensure that the two-band antenna units work at the same time without affecting each other, achieving multi-band requirements, thereby reducing the number of high-speed aircraft antennas. quantity.

Claims (7)

1. The utility model provides a high Wen Gong bore wide wave beam antenna, a serial communication port, including the common bore end penetrate the antenna and prevent heat skylight, common bore end penetrate the antenna including integrate on same double-deck pottery copper-clad plate cover the ultra wide band wave band first antenna and the K wave band second antenna of S-C-X frequency channel, first antenna and second antenna work under same bore, wherein, double-deck pottery copper-clad plate includes upper base plate and lower floor ' S base plate, upper surface and lower floor ' S of upper base plate all cover copper metal surface, first antenna and second antenna all have radiation structure and the feed structure that links, radiation structure all is arranged in upper base plate and lower floor ' S metal surface, prevent heat skylight includes the insulating layer, radiation structure embedding insulating layer, and be located the heat skylight central point and put; the radiating structure of the first antenna is a metal surface formed by closing two exponentially-graded curves printed on the upper and lower surfaces of the double-layer ceramic copper-clad plate and the edges of the double-layer ceramic copper-clad plate along a straight line, wherein a horn-shaped opening is formed between the two exponentially-graded curves, and the positions of the radiating structures of the first antenna printed on the upper and lower surfaces of the double-layer ceramic copper-clad plate are the same; the radiation structure of the second antenna is a right trapezoid metal surface printed on the upper surface and the lower surface of the double-layer ceramic copper-clad plate, and the positions of the radiation structure of the second antenna printed on the upper surface and the lower surface of the double-layer ceramic copper-clad plate are mutually symmetrical.

2. The high-resistance Wen Gong caliber wide beam antenna according to claim 1, further comprising a metal base plate, wherein the heat-proof skylight further comprises a heat-proof cover plate, the heat-proof layer and the metal base plate are arranged in a lamination manner according to a central line and fixedly connected, the heat-proof layer is provided with a groove structure for embedding a common caliber end-shooting antenna, the lower part of the common caliber end-shooting antenna is arranged on the metal base plate, and the lower end part of the common caliber end-shooting antenna extends out of the lower part of the metal base plate.

3. The high-resistance Wen Gong caliber wide beam antenna as claimed in claim 2, wherein the first radio frequency connector and the second radio frequency connector are mounted on the common caliber end-fire antenna at a double-layer ceramic copper-clad plate positioned below the metal base plate, and the double-layer ceramic copper-clad plate is fixedly connected to the metal base plate through an antenna fixing connector.

4. The high-impedance Wen Gong-caliber wide-beam antenna of claim 1, wherein the feed structure of the first antenna comprises a first radio frequency connector, a strip line and a double-sided slot line, the first radio frequency connector and the strip line form a coaxial-strip line converter, the strip line and the double-sided slot line form a strip line-double-sided slot line converter, and the feed structure of the second antenna comprises a second radio frequency connector and a substrate integrated waveguide connected, the second radio frequency connector and the substrate integrated waveguide form a coaxial-substrate integrated waveguide converter.

5. The high-resistance Wen Gong caliber wide beam antenna of claim 4, wherein the strip line is located between the upper substrate and the lower substrate, is in an inverted L shape, is loaded with uniformly distributed metallized through holes on two sides, is loaded with a fan-shaped structure through a transition section, is in a gradual stepped shape, and is connected with the first radio frequency connector at the other end.

6. The high-resistance Wen Gong caliber wide beam antenna as claimed in claim 4, wherein the double-sided slot line is provided on an upper surface of the upper substrate and a lower surface of the lower substrate, a front end of the double-sided slot line is connected with a radiation structure of the first antenna, and a fan-shaped slot is loaded at a tail end of the double-sided slot line.

7. The high-resistance Wen Gong-caliber wide-beam antenna of claim 4, wherein the coaxial-substrate integrated waveguide converter has an open-ended end connected to the radiating structure of the second antenna to form an end-fire antenna.