A Beidou high-precision lightweight anti-interference array antenna

Abstract

The present invention belongs to the field of wireless communication technology, and particularly relates to a Beidou high-precision lightweight anti-interference array antenna, comprising a metal structure, an antenna base plate arranged on the top of the metal structure, and four B3 frequency band unit antennas, wherein the B3 frequency band unit antennas are symmetrically arranged at the four corners of the top of the antenna base plate, wherein a metal ring and an air microstrip multi-frequency integrated antenna are also included on the top of the antenna base plate; the air microstrip multi-frequency integrated antenna is located in the metal ring, and the center of the air microstrip multi-frequency integrated antenna and the center of the metal ring are coaxially arranged with the center of the antenna base plate, etc. The present invention can cover the Beidou B3, B1, L, and S frequency bands through a Beidou multi-band array antenna composed of a plurality of independent antennas, which not only meets the requirements of Beidou navigation equipment, but also realizes the high-precision positioning, anti-interference and lightweight requirements of the navigation equipment.

Description

Technical Field

[0001] The present invention belongs to the technical field of wireless communications, and in particular relates to a Beidou high-precision lightweight anti-interference array antenna. Background Art

[0002] In a complex communication environment, antennas not only have to deal with interference from the natural and electromagnetic environments, but also have to deal with threats from malicious interference sources, which places extremely high demands on the antenna's anti-interference ability.

[0003] In order to improve the anti-interference ability of the antenna, anti-interference array antenna technology came into being; this technology can effectively suppress interference signals and improve the signal reception quality of the antenna through reasonable array layout and advanced signal processing algorithms; however, in practical applications, anti-interference array antennas also face some technical difficulties; on the one hand, the effects of co-frequency mutual coupling, multiplier coupling, and adjacent frequency coupling between array elements will seriously affect the performance of the antenna and reduce its positioning accuracy.

[0004] In addition, as the array size increases, the number of antenna elements required also increases accordingly, which not only increases the complexity and cost of the system, but also leads to a significant increase in the overall weight of the antenna, which brings many difficulties to the deployment and maintenance of the system. The traditional antenna design method also has many shortcomings; taking the stacked design as an example ( Fig.11 As shown in the figure, although this design is easy to install, the array materials of each frequency band are solid and have a high density, which leads to a high overall weight of the entire antenna, increasing the overall burden of the system. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In order to address the problems raised by the above background technology, the present invention proposes a Beidou high-precision lightweight anti-interference array antenna, which aims to reduce the overall weight of the antenna while improving the antenna's high-precision positioning and anti-interference capabilities.

[0007] (II) Technical solution

[0008] The present invention is implemented through the following technical scheme: The present invention proposes a Beidou high-precision lightweight anti-interference array antenna, including a metal structure, an antenna base plate arranged on the top of the metal structure, and four B3 frequency band unit antennas, and the B3 frequency band unit antennas are symmetrically arranged at the four corners of the top of the antenna base plate;

[0009] The invention also includes a metal ring and an air microstrip multi-frequency integrated antenna arranged on the top of the antenna bottom plate; the air microstrip multi-frequency integrated antenna is located in the metal ring, and the center of the air microstrip multi-frequency integrated antenna and the center of the metal ring are coaxially arranged with the center of the antenna bottom plate;

[0010] The air microstrip multi-frequency integrated antenna includes a circular dielectric plate, a capacitive loading screw, a B3 frequency band microstrip patch, a first feeding probe, a short-circuit probe, an annular isolation strip, a B1 / L frequency band microstrip patch, a second feeding probe, a hollow short-circuit copper column, an S frequency band circular dielectric column, an S frequency band microstrip patch, a concave slot and an S frequency band feeding probe;

[0011] The circular dielectric plate is mounted on the top of the antenna bottom plate through a plurality of capacitive loading screws, and the circular dielectric plate is concentrically provided with an annular isolation belt and an S-band circular dielectric column;

[0012] The S-band circular dielectric column is located in the annular isolation zone;

[0013] A B3 band microstrip patch is etched on the top of the circular dielectric plate, and the B3 band microstrip patch is located between the outer edge of the circular dielectric plate and the outermost edge of the annular isolation zone;

[0014] A B1 / L band microstrip patch is etched on the top of the circular dielectric plate, and the B1 / L band microstrip patch is located in the annular isolation zone;

[0015] The B3 band microstrip patch and the B1 / L band microstrip patch are both provided with a circular groove, in which a capacitive loading screw is placed, the diameter of the circular groove is larger than the maximum outer diameter of the capacitive loading screw, 4N capacitive loading screws are provided, and are arranged at equal intervals in the circumferential direction of the circular dielectric plate, N ≥ 1, and N is an integer;

[0016] An S-band microstrip patch is etched on the top of the S-band circular dielectric column, and a concave slot is provided in the middle of the top of the S-band microstrip patch;

[0017] The B3 frequency band microstrip patch is provided with four first feeding probes and 4N short-circuit probes. The first feeding probes and the short-circuit probes penetrate the antenna bottom plate and are connected to the bottom thereof. The first feeding probes and the short-circuit probes are arranged at equal intervals in the circumferential direction of the circular dielectric plate.

[0018] The B1 / L band microstrip patch is provided with four second feeding probes and a hollow short-circuit copper column, wherein the second feeding probe passes through the antenna bottom plate and is connected to the bottom thereof, the second feeding probes are arranged at equal intervals in the circumferential direction of the circular dielectric plate, and there is a hollow short-circuit copper column between the bottom of the circular dielectric plate and the top of the antenna bottom plate;

[0019] An S-band microstrip patch is arranged on the S-band circular dielectric column, a concave slot is cut in the middle of the S-band microstrip patch, an S-band feeding probe is arranged in the middle of the concave slot, and the S-band feeding probe passes through the hollow short-circuit copper column and is connected to the bottom of the antenna base plate.

[0020] Preferably, the first feeding probe and the short-circuit probe are close to the edge of the annular isolation zone, and the first feeding probe and the short-circuit probe are aligned.

[0021] Preferably, the outer edge and the inner edge of the annular isolation zone are both arranged as saw teeth, and the first feeding probe and the short-circuit probe are located in the grooves formed between the saw teeth.

[0022] Preferably, a corner of the B3 frequency band unit antenna away from the metal ring is chamfered.

[0023] Preferably, the width of the groove formed between the saw teeth is 2.5 mm.

[0024] Preferably, the diameter of the circular groove provided on the B3 frequency band microstrip patch is 3 mm, and the diameter of the circular groove provided on the B1 / L frequency band microstrip patch is 2.35 mm.

[0025] Preferably, the metal ring is provided with a plurality of rectangular grooves at equal intervals along its circumferential direction.

[0026] Preferably, the S-band circular medium is fixed to the B1 / L-band microstrip patch by adhesive.

[0027] Preferably, the circular dielectric plate is made of FR4 material, there is air material between the bottom of the circular dielectric plate and the top of the antenna base plate, the S-band circular dielectric column is made of PPO material, and the B3-band unit antenna is made of ceramic material.

[0028] Preferably, the upper surfaces of the B3 frequency band unit antenna and the air microstrip multi-frequency integrated antenna are printed with metal as the metal radiating surface of the antenna, and the metal radiating surface is fed by a number of integrated one-to-two bridges, that is, the integrated bridge feeding is fed through the coaxial probe of the B3 frequency band unit antenna and the air microstrip multi-frequency integrated antenna.

[0029] (III) Beneficial effects

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] The present invention uses multiple independent antennas to form a multi-band Beidou array antenna, covering the Beidou B3, B1, L, and S bands. While meeting the needs of Beidou navigation equipment, it also achieves the high precision, anti-interference and lightweight requirements of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0033] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0034] Figure 2 It is a top view schematic diagram of a circular dielectric plate of the air microstrip multi-frequency integrated antenna of the present invention.

[0035] Figure 3 It is a schematic diagram of the isolation between the B3 frequency band unit antenna of the present invention and the L frequency point in the air microstrip multi-frequency integrated antenna.

[0036] Figure 4 It is a schematic diagram of the isolation between the B3 frequency point in the air microstrip multi-frequency integrated antenna of the present invention and the L frequency point in the air microstrip multi-frequency integrated antenna.

[0037] Figure 5 It is a schematic diagram of the isolation between the B1 frequency point in the air microstrip multi-frequency integrated antenna of the present invention and the L frequency point in the air microstrip multi-frequency integrated antenna.

[0038] Figure 6 It is a schematic diagram of the isolation between the S frequency point in the air microstrip multi-frequency integrated antenna of the present invention and the L frequency point in the air microstrip multi-frequency integrated antenna.

[0039] Figure 7 It is the gain pattern of the antenna array at the center frequency point B3 (1.268 GHz) of the present invention.

[0040] Figure 8 It is the gain radiation pattern of the air microstrip multi-frequency integrated antenna at the B1 center frequency point (1.575GHz) of the present invention.

[0041] Fig. 9 It is the gain radiation pattern of the air microstrip multi-frequency integrated antenna at the L center frequency point (1.616GHz) of the present invention.

[0042] Fig.10 It is the gain radiation pattern of the air microstrip multi-frequency integrated antenna at the S center frequency point (2.492GHz) of the present invention.

[0043] Fig.11 This is a schematic diagram of the traditional product structure.

[0044] Explanation of the reference numerals: 1-metal structural part, 2-antenna base plate, 3-B3 band unit antenna, 4-metal ring, 41-rectangular slot, 5-air microstrip multi-frequency integrated antenna, 51-circular dielectric plate, 52-capacitive loading screw, 53-B3 band microstrip patch, 54-annular isolation strip, 55-B1 / L band microstrip patch, 56-S band circular dielectric column, 57-S band microstrip patch, 58-concave slot, 59-first feeding probe, 510-short-circuit probe, 511-S band feeding probe, 512-hollow short-circuit copper column, 513-second feeding probe. DETAILED DESCRIPTION

[0045] In this technical solution:

[0046] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0047] Figure 1-2 As shown, the present invention is implemented by the following technical scheme: The present invention proposes a Beidou high-precision lightweight anti-interference array antenna, including a metal structure, an antenna base plate arranged on the top of the metal structure, and four B3 frequency band unit antennas, and the B3 frequency band unit antennas are symmetrically arranged at the four corners of the top of the antenna base plate;

[0048] The invention also includes a metal ring and an air microstrip multi-frequency integrated antenna arranged on the top of the antenna bottom plate; the air microstrip multi-frequency integrated antenna is located in the metal ring, and the center of the air microstrip multi-frequency integrated antenna and the center of the metal ring are coaxially arranged with the center of the antenna bottom plate;

[0049] The air microstrip multi-frequency integrated antenna includes a circular dielectric plate (the circular dielectric plate is not close to the metal ring, and there is a gap between them), a capacitive loading screw, a B3 band microstrip patch, a first feeding probe, a short-circuit probe, an annular isolation belt, a B1 / L band microstrip patch, a second feeding probe, a hollow short-circuit copper column, an S band circular dielectric column, an S band microstrip patch, a concave slot and an S band feeding probe;

[0050] The circular dielectric plate is mounted on the top of the antenna bottom plate through a plurality of capacitive loading screws, and the circular dielectric plate is concentrically provided with an annular isolation belt and an S-band circular dielectric column;

[0051] The S-band circular dielectric column is located in the annular isolation zone;

[0052] A B3 band microstrip patch is etched on the top of the circular dielectric plate, and the B3 band microstrip patch is located between the outer edge of the circular dielectric plate and the outermost edge of the annular isolation zone;

[0053] A B1 / L band microstrip patch is etched on the top of the circular dielectric plate, and the B1 / L band microstrip patch is located in the annular isolation zone;

[0054] The B3 band microstrip patch and the B1 / L band microstrip patch are both provided with a circular groove, in which a capacitive loading screw is placed, the diameter of the circular groove is larger than the maximum outer diameter of the capacitive loading screw, 4N capacitive loading screws are provided, and are arranged at equal intervals in the circumferential direction of the circular dielectric plate, N ≥ 1, and N is an integer;

[0055] An S-band microstrip patch is etched on the top of the S-band circular dielectric column, and a concave slot is provided in the middle of the top of the S-band microstrip patch;

[0056] The B3 frequency band microstrip patch is provided with four first feeding probes and 4N short-circuit probes. The first feeding probes and the short-circuit probes penetrate the antenna bottom plate and are connected to the bottom thereof. The first feeding probes and the short-circuit probes are arranged at equal intervals in the circumferential direction of the circular dielectric plate.

[0057] The B1 / L band microstrip patch is provided with four second feeding probes and a hollow short-circuit copper column, wherein the second feeding probe passes through the antenna bottom plate and is connected to the bottom thereof, the second feeding probes are arranged at equal intervals in the circumferential direction of the circular dielectric plate, and there is a hollow short-circuit copper column between the bottom of the circular dielectric plate and the top of the antenna bottom plate;

[0058] An S-band microstrip patch is arranged on the S-band circular dielectric column, a concave slot is cut in the middle of the S-band microstrip patch, an S-band feeding probe is arranged in the middle of the concave slot, and the S-band feeding probe passes through the hollow short-circuit copper column and is connected to the bottom of the antenna base plate.

[0059] The first feeding probe and the short-circuit probe are close to the edge of the annular isolation zone, and the first feeding probe and the short-circuit probe are aligned.

[0060] The outer edge and the inner edge of the annular isolation zone are both arranged as saw teeth, and the first feeding probe and the short-circuit probe are located in the groove formed between the saw teeth.

[0061] Among them, a corner of the B3 frequency band unit antenna away from the metal ring is chamfered.

[0062] The width of the groove formed between the saw teeth is 2.5 mm.

[0063] The diameter of the circular groove of the B3 frequency band microstrip patch is 3 mm, and the diameter of the circular groove of the B1 / L frequency band microstrip patch is 2.35 mm.

[0064] Wherein, the metal ring is provided with a plurality of rectangular grooves at equal intervals along its circumferential direction.

[0065] The S-band circular medium is fixed to the B1 / L-band microstrip patch by adhesive.

[0066] The circular dielectric plate is made of FR4 material, the space between the bottom of the circular dielectric plate and the top of the antenna base plate is air material, the S-band circular dielectric column is made of PPO material, and the B3-band unit antenna is made of ceramic material.

[0067] Among them, the upper surfaces of the B3 frequency band unit antenna and the air microstrip multi-frequency integrated antenna are printed with metal as the metal radiating surface of the antenna, and the metal radiating surface is fed by a number of integrated one-to-two bridges, that is, the integrated bridge feeding is fed through the coaxial probe of the B3 frequency band unit antenna and the air microstrip multi-frequency integrated antenna.

[0068] The working principle of the Beidou high-precision lightweight anti-interference array antenna of the present invention is based on the comprehensive application of a series of precisely designed components and technologies, which not only meets the needs of Beidou navigation equipment, but also realizes the high-precision positioning, anti-interference and lightweight requirements of the navigation equipment.

[0069] First, the air microstrip multi-frequency integrated antenna is placed in the middle of the antenna base plate. B3 and B1 / L band microstrip patches are etched through the circular dielectric plate, and the S band microstrip patch is etched on the S band circular dielectric column; and four B3 band unit antennas are placed in the four corners of the antenna base plate; so that the entire antenna covers multiple transmission and reception bands of the Beidou navigation system.

[0070] Secondly, the B3 and B1 / L frequency bands of the air microstrip multi-frequency integrated antenna adopt a four-feed design, which improves the high-precision positioning capability of the antenna.

[0071] Then, four B3 band unit antennas are symmetrically arranged at the four corners of the top of the antenna base plate. This design is used for receiving B3 band signals and also improves the antenna's anti-interference ability.

[0072] Finally, the air microstrip multi-frequency integrated antenna also uses FR4, air and PPO materials. The selection of these materials not only ensures the performance of the antenna, but also effectively reduces the weight of the antenna. Figure 1 (121 g) and Fig.11 Compared with the conventional product (202 grams), the weight of the conventional product with the same specifications and dimensions is optimized by about 40%.

[0073] To sum up, the Beidou multi-band array antenna of the present invention, which is a combination of multiple independent antennas, can cover the Beidou B3, B1, L, and S bands, which not only meets the needs of Beidou-3 navigation equipment, but also realizes the high-precision positioning, anti-interference and lightweight requirements of the navigation equipment.

[0074] FR4 material is a glass fiber epoxy resin material, also known as FR4 epoxy glass cloth laminate.

[0075] PPO material, namely polyphenylene oxide (Polyphenylene Oxide) material.

[0076] In the technical solution of the present invention, the capacitive loading screw is a special element used to adjust the performance of the antenna; specifically, the capacitive loading screw affects the electrical properties of the antenna, such as the operating frequency, through its physical characteristics and installation method;

[0077] From the description, we can know that the capacitive loading screws are placed in the circular grooves on the circular dielectric plate, which are located on the B3 band microstrip patch and the B1 / L band microstrip patch respectively; the capacitive loading screws are designed so that their diameter is smaller than the diameter of the circular grooves, so that a certain gap is formed between the screws and the circular grooves. This gap can be regarded as a capacitor, that is, capacitive loading;

[0078] The main functions of capacitive loading screws include:

[0079] Fixing function: used to install and fix the circular medium plate;

[0080] Adjust the working frequency of the antenna: By changing the size of the capacitive loading (i.e. the size of the gap between the screw and the circular slot), the resonant frequency of the antenna can be adjusted to make it more in line with the design requirements;

[0081] In summary, the capacitive loading screw plays a key role in the technical solution of the present invention. Through its capacitive loading effect, the performance of the antenna can be effectively adjusted and optimized to meet the requirements of the Beidou navigation system. Example

[0082] Above Figures 3 to 6 The isolation between the receiving frequency bands B3, B1, S and the transmitting frequency band L is described. In engineering, the isolation is usually required to be ≤-20dB; Figure 3 , Figure 4 ,and Figure 6 clearly meets the requirements; and Figure 5 The poor isolation is because the B1 frequency point of the air microstrip multi-frequency integrated antenna and the L frequency point of the air microstrip multi-frequency integrated antenna share the same microstrip patch, so the high isolation is normal;

[0083] Above Figures 7-10 In the figure, the frequency and azimuth are fixed; the ordinate is the gain; the abscissa is the elevation angle. This figure illustrates the changes in elevation angle and gain, as well as parameters such as antenna high and low elevation angle gain, when the frequency and azimuth are fixed.

[0084] Above Figure 3~Figure 10 In order to avoid repeated display of too much data, 3 to 4 representative data are selected for display in each figure.

[0085] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved. In addition, it is obvious that the word "comprising" does not exclude other units or steps, and the singular does not exclude the plural. Multiple units or devices stated in the device claim can also be implemented by one unit or device through software or hardware. The words first, second, etc. are used to indicate names, and do not indicate any particular order.

[0086] Finally, it should be noted that the above is only a specific example of the present invention. Obviously, the present invention is not limited to the above example, and there are many variations. All variations that can be directly derived or associated with the content disclosed by a person skilled in the art should be considered as the protection scope of the present invention.

Claims

1. A Beidou high-precision lightweight anti-interference array antenna, comprising a metal structure (1), an antenna base plate (2) arranged on the top of the metal structure (1), and four B3 frequency band unit antennas (3), wherein the B3 frequency band unit antennas (3) are symmetrically arranged at the four corners of the top of the antenna base plate (2), characterized in that: It also includes a metal ring (4) and an air microstrip multi-frequency integrated antenna (5) arranged on the top of the antenna base plate (2); the air microstrip multi-frequency integrated antenna (5) is located in the metal ring (4), and the center of the air microstrip multi-frequency integrated antenna (5) and the center of the metal ring (4) are coaxially arranged with the center of the antenna base plate (2); The air microstrip multi-frequency integrated antenna (5) comprises a circular dielectric plate (51), a capacitive loading screw (52), a B3 frequency band microstrip patch (53), a first feeding probe (59), a short-circuit probe (510), an annular isolation strip (54), a B1 / L frequency band microstrip patch (55), a second feeding probe (513), a hollow short-circuit copper column (512), an S frequency band circular dielectric column (56), an S frequency band microstrip patch (57), a concave slot (58) and an S frequency band feeding probe (511); The circular dielectric plate (51) is mounted on the top of the antenna bottom plate (2) via a plurality of capacitive loading screws (52), and the circular dielectric plate (51) is concentrically provided with an annular isolation zone (54) and an S-band circular dielectric column (56); The S-band circular dielectric column (56) is located in the annular isolation zone (54); A B3 frequency band microstrip patch (53) is etched on the top of the circular dielectric plate (51), and the B3 frequency band microstrip patch (53) is located between the outer edge of the circular dielectric plate (51) and the outermost edge of the annular isolation zone (54); A B1 / L frequency band microstrip patch (55) is etched on the top of the circular dielectric plate (51), and the B1 / L frequency band microstrip patch (55) is located in the annular isolation zone (54); The B3 frequency band microstrip patch (53) and the B1 / L frequency band microstrip patch (55) are both provided with a circular groove, in which a capacitive loading screw (52) is placed, the diameter of the circular groove is greater than the maximum outer diameter of the capacitive loading screw (52), 4N capacitive loading screws (52) are provided and are arranged at equal intervals in the circumferential direction of the circular dielectric plate (51), N≥1, and N is an integer; An S-band microstrip patch (57) is etched on the top of the S-band circular dielectric column (56), and a concave groove (58) is provided in the middle of the top of the S-band microstrip patch (57); The B3 frequency band microstrip patch (53) is provided with four first feeding probes (59) and four short-circuit probes (510); the first feeding probes (59) and the short-circuit probes (510) penetrate the antenna bottom plate (2) and are connected to the bottom thereof; the first feeding probes (59) and the short-circuit probes (510) are arranged at equal intervals in the circumferential direction of the circular dielectric plate (51); The B1 / L frequency band microstrip patch (55) is provided with four second feeding probes (513) and a hollow short-circuit copper column (512), wherein the second feeding probes (513) penetrate the antenna bottom plate (2) and are connected to the bottom thereof, the second feeding probes (513) are arranged at equal intervals in the circumferential direction of the circular dielectric plate (51), and a hollow short-circuit copper column (512) is provided between the bottom of the circular dielectric plate (51) and the top of the antenna bottom plate (2); An S-band microstrip patch (57) is provided on an S-band circular dielectric column (56), a concave slot (58) is cut in the middle of the S-band microstrip patch (57), an S-band feeding probe (511) is provided in the middle of the concave slot (58), and the S-band feeding probe (511) passes through a hollow short-circuit copper column (512) and is connected to the bottom of the antenna bottom plate (2); The first feeding probe (59) and the short-circuit probe (510) are close to the edge of the annular isolation zone (54), and the first feeding probe (59) and the short-circuit probe (510) are arranged in alignment; The outer edge and the inner edge of the annular isolation zone (54) are both arranged in sawtooth form, and the first feeding probe (59) and the short-circuit probe (510) are located in the groove formed between the sawtooth.

2. The Beidou high-precision lightweight anti-interference array antenna according to claim 1, characterized in that: A corner of the B3 frequency band unit antenna (3) away from the metal enclosure (4) is chamfered.

3. The Beidou high-precision lightweight anti-interference array antenna according to claim 1, characterized in that: The width of the groove formed between the saw teeth is 2.5 mm.

4. The Beidou high-precision lightweight anti-interference array antenna according to claim 1, characterized in that: The diameter of the circular groove provided on the B3 frequency band microstrip patch (53) is 3 mm, and the diameter of the circular groove provided on the B1 / L frequency band microstrip patch (55) is 2.35 mm.

5. The Beidou high-precision lightweight anti-interference array antenna according to claim 1, characterized in that: The metal surrounding ring (4) is provided with a plurality of rectangular grooves (41) at equal intervals along its circumferential direction.

6. The Beidou high-precision lightweight anti-interference array antenna according to claim 1, characterized in that: The S-band circular medium is fixed to the B1 / L-band microstrip patch (55) via adhesive.

7. The Beidou high-precision lightweight anti-interference array antenna according to claim 1, characterized in that: The circular dielectric plate (51) is made of FR4 material, air material is present between the bottom of the circular dielectric plate (51) and the top of the antenna base plate (2), the S-band circular dielectric column (56) is made of PPO material, and the B3-band unit antenna (3) is made of ceramic material.

8. The Beidou high-precision lightweight anti-interference array antenna according to claim 1, characterized in that: The upper surfaces of the B3 frequency band unit antenna (3) and the air microstrip multi-frequency integrated antenna (5) are both printed with metal as the metal radiating surface of the antenna, and the metal radiating surface is fed by a plurality of integrated one-to-two bridges, that is, the integrated bridge feeds the coaxial probes of the B3 frequency band unit antenna (3) and the air microstrip multi-frequency integrated antenna (5).

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