UHF / L / S three-frequency-band broadband common-caliber antenna array combination

Abstract

The invention discloses a UHF / L / S three-frequency-band broadband common-caliber antenna array combination, and belongs to the technical field of antennas. Comprising a UHF frequency band antenna unit, an L frequency band antenna unit, an S frequency band antenna unit, a metal bottom plate, a large cylinder, a small cylinder, a wiring block, a support column, a lightening hole, a rainproof cover, a UHF frequency band antenna unit mounting base, an L frequency band antenna unit mounting base, an S frequency band antenna unit mounting base, a UHF frequency band one-to-four power divider, an L frequency band one-to-four power divider and an S frequency band one-to-four power divider. And a stand column base and the like. According to the UHF / L / S three-frequency-band antenna array, the L-frequency-band antenna array is placed in the middle of the UHF-frequency-band antenna array, the S-frequency-band antenna array is placed in the middle of the L-frequency-band antenna array, and the isolation cavities are added between the arrays, so that the common-caliber design of the UHF / L / S three-frequency-band antenna array is realized. The antenna works in three frequency bands of UHF, L and S, and the gains in the three working frequency bands are all greater than 10dBi. In addition, the antenna can be applied to the fields of ground portable communication, vehicle-mounted communication and measurement and control.

Description

Technical Field

[0001] The present invention relates to the field of antenna technology, and in particular to a UHF / L / S three-band wide-band common-aperture antenna array combination. Background Art

[0002] With the maturity of single-band antenna technology and the widespread adoption of wireless communication networks, research has shifted to dual-band or multi-band antennas. The wireless market urgently requires radar, mobile communications, and satellite positioning systems to utilize frequency reuse in multi-band antennas to address the increasingly crowded microwave spectrum. There are two approaches to achieving dual-band or multi-band characteristics: single-layer and multi-layer. The multi-layer approach often adopts a stacked structure, with a low-frequency patch placed on the bottom layer and a high-frequency patch placed on top. The low-frequency patch also serves as a floor for the high-frequency unit. Since these are essentially two independent patches placed at different heights, a variety of patch shapes can be used, including square, circular, triangular, and fractal structures. Most feeding methods are also applicable, including probe feeding, coplanar feeding, aperture coupling, and L-shaped probes.

[0003] Because multi-band co-aperture antennas share a single aperture across several frequency bands, they significantly reduce antenna size and radar cross section (RCS) while increasing communication capacity. Therefore, multi-band co-aperture antennas and arrays have broad application prospects in ship-borne, aircraft-borne, and satellite-borne multi-band radars. Furthermore, multi-band co-aperture radar antennas can share numerous subsequent subsystems, conserving system resources and reducing system load.

[0004] Research on multi-band co-aperture antennas began abroad. Je-Boyn conducted experiments on co-aperture array antennas in the early 1970s. The designed antenna shared the same aperture for the L, S, and C bands. Since the 1980s, system requirements for antennas have become increasingly stringent, and due to their obvious advantages, multi-band co-aperture antennas have become a research hotspot. Since the 1990s, with the maturity of theoretical research, multi-band co-aperture antennas have gradually moved towards practical engineering applications, with numerous antenna prototypes designed for different engineering requirements reported. my country is also gradually exploring multi-band co-aperture array antennas. However, most research remains at the theoretical stage, with few successful results and even fewer in practical application.

[0005] For antennas in certain communication systems, multi-band operation, compact size, light weight, and minimal interaction between multiple antennas are often desirable. Therefore, co-aperture antennas are often used due to their unique characteristics. Publicly reported achievements include dual-band and tri-band co-aperture antennas, most of which feature narrow bandwidth. However, there are few public reports on broadband co-aperture antenna arrays operating in the UHF / L / S triple-band range. Summary of the Invention

[0006] In view of this, the present invention proposes a UHF / L / S three-band wide-band co-aperture antenna array combination, which can simultaneously operate in the UHF, L and S frequency bands, using a broadband array combination and co-aperture antenna technology.

[0007] In order to achieve the above object, the technical solution adopted by the present invention is:

[0008] A UHF / L / S three-band wideband common aperture antenna array combination, comprising a UHF band antenna unit 1, an L band antenna unit 2, an S band antenna unit 3, a large tube 5 and a small tube 6;

[0009] The UHF band antenna units are combined into a 2×2 UHF antenna array via a UHF band one-to-four power splitter 14, the L band antenna units are combined into a 2×2 L band antenna array via an L band one-to-four power splitter 15, and the S band antenna units are combined into a 2×2 S band antenna array via an S band one-to-four power splitter.

[0010] An L antenna array is placed at the center of the UHF antenna array; an S-band antenna array is placed at the center of the L-band antenna array; and the heights of the three are different; the UHF band antenna array and the L-band antenna array share a large tube 5 as a metal isolation cavity, and the L-band antenna array and the S-band antenna array share a small tube 6 as a metal isolation cavity, and the heights of the large tube and the small tube are respectively higher than the cross-sectional height of the L-band antenna array and the cross-sectional height of the S-band antenna array.

[0011] Further,

[0012] The UHF band antenna unit includes a UHF band radiation oscillator 1-1, a UHF band matching plate 1-2, a metal support rod 1-3, a dielectric support column 1-4, a UHF band antenna base 1-5 and a radio frequency cable assembly 1-6;

[0013] The UHF band radiation vibrator 1-1, the UHF band matching plate 1-2 and the UHF band antenna base 1-5 are arranged in parallel; the UHF band antenna base 1-5 and the UHF band radiation vibrator 1-1 are connected and supported by a metal support rod 1-3; the UHF band matching plate 1-2 is connected to the UHF band radiation vibrator 1-1 through a dielectric support column 1-4;

[0014] There are two UHF band radiation vibrators 1-1 and two metal support rods 1-3; and they correspond one to one, and the UHF band radiation vibrator 1-1 is installed on the corresponding metal support rod 1-3; the RF cable assembly is installed at the bottom of one of the metal support rods, and its inner conductor passes through the via hole on the metal support rod and is connected to the UHF band radiation vibrator 1-1 on its top.

[0015] Further,

[0016] The L-band antenna unit includes an L-band radiating element 2-1, an L-band matching plate 2-2, a dielectric support 2-3, a round metal copper tube L2-5, a top screw L2-6, a card board 2-7, an L-band antenna base 2-8 and a radio frequency socket L2-9;

[0017] The L-band radiation oscillator 2-1 and the L-band matching disk 2-2 are parallel to each other;

[0018] The L-band antenna base 2-8 is a stand structure, including a base L and two opposing supports L; both supports L are located on top of the base L; two L-band radiating elements 2-1 are provided, each mounted on top of a corresponding support L; the L-band matching plate 2-2 is mounted directly above the L-band radiating element 2-1 via a dielectric support 2-3;

[0019] The circular metal copper tube L is installed between the two supports L and is hoisted on the extended inner end of one of the L-band radiating elements 2-1; the RF socket L2-9 is installed at the bottom of the L-band antenna base 2-8, and its inner conductor passes through the L-band antenna base 2-8 and is located in the central through hole of the circular metal copper tube L and is connected to the circular metal copper tube L;

[0020] The top screw L passes through the side wall of the circular metal copper tube L and abuts against the inner conductor of the internal RF socket L2-9;

[0021] The card plate is mounted on the same side of the two supports and is used to adjust the voltage standing wave ratio of the L-band antenna unit.

[0022] Furthermore, the S-band antenna unit includes an S-band radiation oscillator 3-1, a round metal copper tube S3-2, a top screw S3-3, an S-band antenna base 3-4, and a radio frequency socket S3-5;

[0023] The S-band antenna base 3-4 is a stand structure, including a base S and two opposing supports S; both supports S are located on top of the base S; two S-band radiating elements 3-1 are provided, each mounted on top of the corresponding support S; the circular metal copper tube S3-2 is hoisted at the extended inner end of one of the S-band radiating elements 3-1 and is located in the middle of the two supports S;

[0024] The RF socket S is mounted on the bottom of the S-band antenna base, and its inner conductor passes through the S-band antenna base and is located in the central through hole of the circular metal copper tube S and is connected to the circular metal copper tube S;

[0025] The top screw S passes through the side wall of the circular metal copper tube S and abuts against the inner conductor of the internal radio frequency socket S.

[0026] Furthermore, the UHF band antenna units are evenly distributed on the metal base plate 4, and the distance from the center of the UHF band antenna array is greater than the radius of the large cylinder, and the height of the multiple groups of UHF band antenna units is greater than the height of the large cylinder.

[0027] Furthermore, the L-band antenna units are evenly distributed on the metal base plate, and the distance from the center of the L-band antenna is greater than the radius of the small tube and smaller than the radius of the large tube. The height of multiple groups of L-band antenna units is greater than the height of the small tube and smaller than the height of the large tube.

[0028] Furthermore, the S-band antenna units are evenly distributed on the metal base plate, and the distance from the center of the S-band antenna is smaller than the radius of the small tube, and the height of the multiple groups of S-band antenna units is smaller than the height of the small tube.

[0029] Furthermore, the lower end of the metal isolation cavity is connected to the metal bottom plate; the height of the large tube is higher than the L-band antenna unit, and the L-band antenna unit is located within the area surrounded by the large tube;

[0030] The height of the small tube is higher than the S-band antenna unit, and the S-band antenna unit is located within the area surrounded by the small tube; the radius of the metal isolation cavity can be appropriately adjusted according to actual application scenarios.

[0031] Furthermore, it also includes a pillar 8, which is a non-metallic hollow structure. The height of the pillar is higher than the height of the UHF band antenna unit and is used for support.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] A UHF / L / S tri-band wideband co-aperture antenna array combination achieves a co-aperture design by placing an L-band antenna array within a UHF antenna array, an S-band antenna array within an L-band antenna array, and adding an isolation cavity between each array. This antenna features a compact overall structure, tri-band functionality, high gain, high isolation, light weight, and compact size. Gain exceeds 10dBi across all three operating frequency bands. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 A front view of a UHF / L / S triple-band wideband common-aperture antenna array combination provided by an embodiment of the present invention.

[0035] Figure 2 A side view of a UHF / L / S triple-band wideband common-aperture antenna array combination provided in an embodiment of the present invention.

[0036] Figure 3A rear view of a UHF / L / S triple-band wideband common-aperture antenna array combination provided in an embodiment of the invention.

[0037] Figure 4 This is a structural diagram of a UHF band antenna unit provided by an embodiment of the present invention.

[0038] Figure 5 A structural diagram of an L-band antenna unit provided in an embodiment of the present invention;.

[0039] Figure 6 This is a structural diagram of the S-band antenna unit provided in an embodiment of the present invention.

[0040] Figure 7 A structural diagram of a pillar provided in an embodiment of the present invention.

[0041] Figure 8 A schematic structural diagram of a rain cover provided in an embodiment of the present invention.

[0042] Explanation of the accompanying symbols: 1-UHF band antenna unit 2-L band antenna unit 3-S band antenna unit 4-metal base plate 5-large tube 6-small tube 7-connecting block 8-pillar 9-weight reduction hole 10-rain cover 11-UHF band antenna unit mounting base 12-L band antenna unit mounting base 13-S band antenna unit mounting base 14-UHF band one-to-four power splitter 15-L band one-to-four power splitter 16-S band one-to-four power splitter 17-column base

[0043] Description of reference numerals: 1-1-UHF band radiation oscillator 1-2-UHF band matching plate 1-3-metal support rod 1-4-dielectric support column 1-5-UHF band antenna base 1-6-RF cable assembly

[0044] Explanation of reference numerals: 2-1-L-band radiating element 2-2-L-band matching plate 2-3-dielectric support 2-4-metal screw 2-5-round metal copper tube 2-6-top screw 2-7-clip board 2-8-L-band antenna base 2-9-RF socket

[0045] Description of reference numerals: 3-1-S band radiating element 3-2-round metal copper tube 3-3-top screw 3-4-S band antenna base 3-5-RF socket

[0046] Description of reference numerals: 8-1-circular cap 8-2-circular tube 8-3-circular gasket 8-4-special-shaped gasket DETAILED DESCRIPTION

[0047] The accompanying drawings are for illustrative purposes only and are not to be construed as limiting this patent;

[0048] It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings;

[0049] A UHF / L / S tri-band wideband co-aperture antenna array combination achieves a co-aperture design by placing an L-band antenna array within a UHF antenna array, an S-band antenna array within an L-band antenna array, and adding an isolation cavity between each array. This antenna features a compact overall structure, tri-band functionality, high gain, high isolation, light weight, and compact size. Gain exceeds 10dBi across all three operating frequency bands.

[0050] The technical solution adopted by the present invention includes: a UHF / L / S three-band wideband common aperture antenna array combination, which includes a UHF band antenna unit 1, an L band antenna unit 2, an S band antenna unit 3, a metal base plate 4, a large tube 5, a small tube 6, a connection block 7, a pillar 8, a weight reduction hole 9, a rain cover 10, a UHF band antenna unit mounting base 11, an L band antenna unit mounting base 12, an S band antenna unit mounting base 13, a UHF band one-to-four power splitter 14, an L band one-to-four power splitter 15, an S band one-to-four power splitter 16, and a column base 17, see Figure 1 、 Figure 2 and Figure 3 .

[0051] Furthermore, the UHF band antenna unit 1 includes a UHF band radiation oscillator 1-1, a UHF band matching plate 1-2, a dielectric support column 1-4, a metal support rod 1-3, a UHF band antenna base 1-5, and a radio frequency cable assembly 1-6. Figure 4 There are 4 UHF band antenna units 1, which form a 2×2 UHF antenna array through a UHF band one-to-four power splitter 14. The UHF band antenna unit 1 is fixed on the base plate 4 through a UHF band antenna unit mounting base 11.

[0052] Furthermore, the L-band antenna unit 2 includes an L-band radiating element 2-1, an L-band matching plate 2-2, a dielectric support 2-3, a metal screw 2-4, a round metal copper tube 2-5, a top screw 2-6, a card plate 2-7, an L-band antenna base 2-8, and a radio frequency socket 2-9. Figure 5 There are four L-band antenna units 2, which form a 2×2 L-antenna array through an L-band one-to-four power splitter 15. The L-band antenna unit 2 is fixed to the base plate 4 through an L-band antenna unit mounting base 12, and the L-antenna array is inside the UHF antenna array.

[0053] Furthermore, the S-band antenna unit 3 includes an S-band radiating element 3-1, a round metal copper tube 3-2, a top wire 3-3, an S-band antenna base 3-4, and a radio frequency socket 3-5. Figure 6 There are four S-band antenna units 3, which form a 2×2 S antenna array through an S-band one-to-four power splitter 16. The S-band antenna units 3 are fixed to the base plate 4 through the S-band antenna unit mounting base 13, and the S antenna array is inside the L antenna array.

[0054] Furthermore, the metal bottom plate 4 is rectangular with large radian cut corners at the four corners. There are also many weight-reducing holes 9 on the metal bottom plate 4. The weight-reducing holes 9 mainly play the role of weight reduction and sand leakage. Figure 1 and Figure 3 .

[0055] Furthermore, the large tube 5 is circular and located in the center of the metal base plate 4. It is placed between the UHF array composed of four UHF band antenna units 1 and the L array composed of four L band antenna units 2. The height of the large tube 5 is higher than the height of the L band antenna unit 2 and lower than the height of the UHF band antenna unit 1. The large tube 5 mainly plays the role of isolating and improving the array beam. Figure 1 and Figure 2 .

[0056] Furthermore, the small tube 6 is circular and located in the center of the metal base plate 4. It is placed between the L array composed of four L-band antenna units 2 and the S array composed of four S-band antenna units 3. The height of the small tube 6 is higher than the height of the S-band antenna unit 3 and lower than the height of the L-band antenna unit 2. The small tube 6 mainly plays the role of isolating and improving the array beam. Figure 1 and Figure 2 .

[0057] Furthermore, the connecting block 7 is a metal connector, which has multiple groups on the large cylinder 5 and the small cylinder 6, and is used to firmly fix the large cylinder 5 and the small cylinder 6 on the metal base plate 4. Figure 1 .

[0058] Furthermore, the support 8 is a pair of non-metallic components. It includes a circular cap 8-1, a circular tube 8-2, a circular gasket 8-3, and a special-shaped gasket 8-4. These four parts are all non-metallic parts and are connected together in sequence by screws to form the support 8. The bottom of the support 8 is fixed to the metal base plate 4 through the column base 17. The top of the support 8 is suspended. The height of the support 8 is higher than the height of the UHF band antenna unit 1. It mainly plays a supporting role when the antenna falls over to prevent damage to the antenna array. Figure 1 、 Figure 2 and Figure 3 .

[0059] Furthermore, the rain cover 10 is located on the back of the metal base plate 4 and is a special-shaped metal part. The interior of the rain cover 10 is equipped with a UHF band one-to-four power splitter 14, an L band one-to-four power splitter 15, and an S band one-to-four power splitter 16. The rain cover 10 mainly plays the role of protecting the antenna from rain and sand when it is stored in the form of a stowage. Figure 2 and Figure 8 .

[0060] In order to illustrate the structure and features of the present invention in detail, the technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0061] See also Figure 1 、 Figure 2 and Figure 3 , is a combined structural diagram of a UHF / L / S three-band wide-band common-aperture antenna array of the present invention, which includes a UHF band antenna unit 1, an L band antenna unit 2, an S band antenna unit 3, a metal base plate 4, a large tube 5, a small tube 6, a connecting block 7, a pillar 8, a weight reduction hole 9, a rain cover 10, a UHF band antenna unit mounting base 11, an L band antenna unit mounting base 12, an S band antenna unit mounting base 13, a UHF band one-to-four power splitter 14, an L band one-to-four power splitter 15, an S band one-to-four power splitter 16, and a column base 17.

[0062] In this embodiment, the installation positions of the UHF band antenna unit 1, the L band antenna unit 2 and the S band antenna unit 3 are as follows: a 2×2 L antenna array formed by four L band antenna units 2 is placed in the center of the 2×2 UHF antenna array formed by four UHF band antenna units 1, and the cross-sectional height of the UHF antenna array is greater than that of the L antenna array, and the cross-sectional height of the UHF antenna array is 175 mm. The unit spacing between the horizontal planes of the UHF antenna array is 500 mm, and the unit spacing between the vertical planes is 400 mm, and a large tube 5 is shared between the two. A 2×2 S antenna array formed by four S band antenna units 3 is placed in the center of the 2×2 L antenna array formed by four L band antenna units 2, and the cross-sectional height of the L antenna array is greater than that of the S antenna array, and the cross-sectional height of the L antenna array is 87 mm. The unit spacing between the horizontal planes of the L antenna array is 150 mm, and the unit spacing between the vertical planes is 162 mm, and a small tube 6 is shared between the two. The cross-sectional height of the S antenna array is 37 mm, the unit spacing between the horizontal planes of the S antenna array is 45 mm, and the unit spacing between the vertical planes is 66 mm. The S antenna array is located in the exact center of the three arrays and also in the exact center of the metal base plate 4. The UHF antenna array, L antenna array, and S antenna array are arranged from the outside to the inside, forming a nested form. Figure 1 and Figure 2 .

[0063] In this embodiment, the UHF band antenna unit 1, see Figure 4 It consists of a UHF-band radiating element 1-1, a UHF-band matching plate 1-2, a dielectric support column 1-4, a metal support rod 1-3, a UHF-band antenna base 1-5, and an RF cable assembly 1-6. A pair of UHF-band radiating elements 1-1 is 291mm long, 73mm wide, and 151mm high from the metal base plate 4. The UHF-band matching plate 1-2 is circular, 1mm thick, and 200mm in diameter, with a 20mm gap between it and the UHF-band radiating element 1-1. The dielectric support column 1-3 primarily serves as a support, used to support and secure the UHF-band matching plate 1-2.

[0064] In this embodiment, the L-band antenna unit 2, see Figure 5 It consists of an L-band radiating element 2-1, an L-band matching plate 2-2, a dielectric support 2-3, metal screws 2-4, a circular metal copper tube 2-5, a screw 2-6, a clamping plate 2-7, an L-band antenna base 2-8, and an RF socket 2-9. The pair of L-band radiating elements 2-1 are 128 mm long, 20 mm wide, and 70 mm high from the metal base plate 4. The L-band matching plate 2-4 is a long strip with a thickness of 1 mm, a length of 60 mm, and a width of 12 mm. The distance between the L-band radiating element 2-1 and the L-band radiating element 2-1 is 18 mm. The dielectric support 2-3 primarily supports and secures the L-band matching plate 2-2. The screw 2-6 secures the circular metal copper tube 2-5 and the inner core of the RF socket 2-9 to prevent loosening. The clamping plate 2-7 is adjustable in height from the metal base plate 4 and is used to adjust the voltage standing wave ratio of the L-band antenna unit 2.

[0065] In this embodiment, the S-band antenna unit 3, see Figure 6 It consists of an S-band radiator 3-1, a circular copper tube 3-2, a screw 3-3, an S-band antenna base 3-4, and an RF socket 3-5. A pair of S-band radiators 3-1 is 60 mm long, 10 mm wide, and 38 mm high from the metal base 4. The screw 3-3 secures the inner core of the circular copper tube 3-2 and the RF socket 3-5 to prevent loosening.

[0066] In this embodiment, the metal base plate 4, see Figure 1It is rectangular with large-radius cut corners and measures 1000mm×800mm. There are also many circular weight-reducing holes 9 on the metal base plate 4. The weight-reducing holes 9 mainly serve to reduce weight and leak sand. The UHF band antenna unit 1, L band antenna unit 2, and S band antenna unit 3 are respectively mounted on the metal base plate 4 via the UHF band antenna unit mounting base 13, the L band antenna unit mounting base, and the S band antenna unit mounting base. The metal base plate 4 is designed with interfaces and bases for mounting other components. The UHF band one-to-four power splitter 14, the L band one-to-four power splitter 15, and the S band one-to-four power splitter 16 are respectively mounted on the back of the metal base plate 4, see Figure 3 .

[0067] In this embodiment, the large cylinder 5, see Figure 1 , is a circular metal part with a thickness of 1 mm, a diameter of 400 mm, and a height of 91 mm. The cross-sectional height is 4 mm higher than the cross-sectional height of the L-band antenna unit 2.

[0068] The large tube 5 is mounted on the metal base plate 4 through a plurality of connection blocks 7. The large tube 5 mainly plays the role of isolating and improving the array beam.

[0069] In this embodiment, the small tube 6, see Figure 1 It is a circular metal part with a thickness of 1 mm, a diameter of 190 mm, and a height of 48 mm. Its cross-sectional height is 11 mm higher than that of the S-band antenna unit 2.

[0070] The small tube 6 is mounted on the metal base plate 4 through a plurality of connection blocks 7. The small tube 6 mainly plays the role of isolating and improving the array beam.

[0071] In this embodiment, the support 8, see Figure 2 and Figure 7 , is a non-metallic assembly, with a total of two pillars 8, with a diameter of approximately 50mm and a height of 245mm. Pillar 8 consists of four parts: a circular cap 8-1, a circular tube 8-2, a circular gasket 8-3, and a special-shaped gasket 8-4. These four parts are all non-metallic parts and are connected together in sequence by screws to form pillar 8. The bottom of pillar 8 is fixed to the metal base plate 4 through the pillar base 17, and the top of pillar 8 is suspended in the air. The height of pillar 8 is 70mm higher than that of the UHF band antenna unit 1. Its main function is to provide support when the antenna falls over to prevent damage to the antenna array.

[0072] In this embodiment, the rain cover 10, see Figure 2 and Figure 8Located on the back of the metal base plate 4, it is a special-shaped metal component with dimensions of approximately 555mm (length) × 234mm (width) × 45mm (thickness). The rain cover 10 houses a UHF band one-to-four power splitter 14, an L-band one-to-four power splitter 15, and an S-band one-to-four power splitter 16. The rain cover 10 primarily protects the antenna from rain and sand when it is stored.

[0073] Parts not described in detail in the present invention belong to the skills of those skilled in the art. Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A UHF / L / S three-band broadband common aperture antenna array combination, characterized in that: It includes a UHF band antenna unit (1), an L band antenna unit (2), an S band antenna unit (3), a large tube (5) and a small tube (6); The UHF band antenna unit is combined into a 2×2 UHF antenna array through a UHF band one-to-four power splitter (14), the L band antenna unit is combined into a 2×2 L band antenna array through an L band one-to-four power splitter (15), and the S band antenna unit is combined into a 2×2 S band antenna array through an S band one-to-four power splitter; The L antenna array is placed at the center of the UHF antenna array; The S-band antenna array is placed at the center of the L-band antenna array; The heights of the three are different; the UHF band antenna array and the L band antenna array share a large tube (5) as a metal isolation cavity, and the L band antenna array and the S band antenna array share a small tube (6) as a metal isolation cavity, and the heights of the large tube and the small tube are respectively higher than the cross-sectional height of the L band antenna array and the cross-sectional height of the S band antenna array.

2. The UHF / L / S triple-band wideband common aperture antenna array combination according to claim 1, characterized in that: The UHF band antenna unit comprises a UHF band radiation oscillator (1-1), a UHF band matching plate (1-2), a dielectric support column (1-4), a metal support rod (1-3), a UHF band antenna base (1-5) and a radio frequency cable assembly (1-6); The UHF band radiation oscillator (1-1), the UHF band matching disk (1-2) and the UHF band antenna base (1-5) are arranged in parallel; the UHF band antenna base (1-5) and the UHF band radiation oscillator (1-1) are connected and supported by a metal support rod (1-3); the UHF band matching disk (1-2) is connected to the UHF band radiation oscillator (1-1) by a dielectric support column (1-4); Two UHF-band radiation oscillators (1-1) and two metal support rods (1-3) are provided, and the two UHF-band radiation oscillators (1-1) are mounted on the corresponding metal support rods (1-3). The radio frequency cable assembly is mounted on the bottom of one of the metal support rods, and its inner conductor passes through a via hole on the metal support rod and is connected to the UHF-band radiation oscillator (1-1) on the top of the metal support rod.

3. The UHF / L / S triple-band wideband common aperture antenna array combination according to claim 1, characterized in that: The L-band antenna unit comprises an L-band radiating element (2-1), an L-band matching plate (2-2), a dielectric support (2-3), a round metal copper tube L (2-5), a top screw L (2-6), a card board (2-7), an L-band antenna base (2-8) and a radio frequency socket L (2-9); The L-band radiation oscillator (2-1) and the L-band matching disk (2-2) are parallel to each other; The L-band antenna base (2-8) is a stand structure, comprising a bottom L and two opposing supports L; the two supports L are both located on top of the bottom L; two L-band radiating oscillators (2-1) are provided, each mounted on the top of the corresponding support L; the L-band matching disk (2-2) is mounted directly above the L-band radiating oscillator (2-1) via a dielectric support (2-3); The circular metal copper tube L is installed between two supports L and is suspended at the extended inner end of one of the L-band radiation oscillators (2-1); the radio frequency socket L (2-9) is installed at the bottom of the L-band antenna base (2-8), and its inner conductor passes through the L-band antenna base (2-8) and is located in the central through hole of the circular metal copper tube L and is connected to the circular metal copper tube L; The top wire L passes through the side wall of the circular metal copper tube L and abuts against the inner conductor of the internal radio frequency socket L (2-9); The card plate is mounted on the same side of the two supports and is used to adjust the voltage standing wave ratio of the L-band antenna unit.

4. The UHF / L / S triple-band wideband common aperture antenna array combination according to claim 1, characterized in that: The S-band antenna unit comprises an S-band radiating element (3-1), a circular metal copper tube S (3-2), a top wire S (3-3), an S-band antenna base (3-4), and a radio frequency socket S (3-5); The S-band antenna base (3-4) is a stand structure, comprising a base S and two opposing supports S; the two supports S are both located on top of the base S; two S-band radiating elements (3-1) are provided, each mounted on the top of the corresponding support S; the circular metal copper tube S (3-2) is hoisted at the extended inner end of one of the S-band radiating elements (3-1) and is located in the middle of the two supports S; The RF socket S is installed at the bottom of the S-band antenna base, and its inner conductor passes through the S-band antenna base and is located in the central through hole of the circular metal copper tube S and is connected to the circular metal copper tube S; The top screw S passes through the side wall of the circular metal copper tube S and abuts against the inner conductor of the internal radio frequency socket S.

5. The UHF / L / S triple-band wideband common aperture antenna array combination according to claim 2, characterized in that: The UHF band antenna units are evenly distributed on the metal base plate (4), and the distance from the center of the UHF band antenna array is greater than the radius of the large cylinder. The height of the multiple groups of UHF band antenna units is greater than the height of the large cylinder.

6. The UHF / L / S triple-band wideband common aperture antenna array combination according to claim 3, characterized in that: The L-band antenna units are evenly distributed on the metal base plate, and the distance from the center of the L-band antenna is greater than the radius of the small tube and smaller than the radius of the large tube. The height of multiple groups of L-band antenna units is greater than the height of the small tube and smaller than the height of the large tube.

7. The UHF / L / S triple-band wideband common aperture antenna array combination according to claim 4, characterized in that: The S-band antenna units are evenly distributed on the metal base plate, and the distance from the center of the S-band antenna is smaller than the radius of the small tube. The height of the multiple groups of S-band antenna units is smaller than the height of the small tube.

8. The UHF / L / S triple-band wideband common aperture antenna array combination according to claim 1, characterized in that: The lower end of the metal isolation cavity is connected to the metal bottom plate; the height of the large tube is higher than the L-band antenna unit, and the L-band antenna unit is located in the area surrounded by the large tube; The height of the small tube is higher than the S-band antenna unit, and the S-band antenna unit is located within the area surrounded by the small tube; the radius of the metal isolation cavity can be appropriately adjusted according to actual application scenarios.

9. The UHF / L / S triple-band wideband common aperture antenna array combination according to claim 1, characterized in that: It also includes a support (8), which is a non-metallic hollow structure. The height of the support is higher than the height of the UHF frequency band antenna unit and is used for support.

10. A UHF / L / S three-band wideband common aperture antenna array combination according to claim 3 or 4, characterized in that: The round metal copper tube has no contact with the base.

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