An all-metal ultra-wideband CTS antenna

Abstract

The invention discloses an all-metal ultra-wideband CTS antenna, comprising a radiation layer, a line source generator layer, a back cavity power divider layer and a planar single-ridge power divider layer which are arranged in order from top to bottom, the line source generator layer is directly connected to the CTS radiation slot of the radiation layer, the back cavity power divider layer and the planar single-ridge power divider are combined to form a broadband multi-channel power divider to excite the line source generator layer, the quasi-TEM wave generated by the line source generator layer is directly fed to the CTS radiation slot of the radiation layer, the 1-to-4 single-ridge power divider in the planar single-ridge power divider layer is realized by sequentially cascading a plurality of H-plane single-ridge T-junctions, when the number of CTS radiation slots in the radiation layer increases, only the planar single-ridge power divider layer, the back cavity power divider layer and the line source generator layer need to be horizontally extended to form a broadband feeding network, and the overall height of the CTS antenna is not increased; the advantages are that the efficiency is significantly improved, the bandwidth is increased, the scalability is greatly improved, the structure is more compact, and the manufacturing and assembly are easy.

Description

Technical Field

[0001] The invention relates to a CTS antenna, in particular to an all-metal ultra-wideband CTS antenna. Background Art

[0002] The CTS (Continuous Transverse Stub) array antenna was first proposed by Raytheon in the United States in the 1990s, and a large number of planar structure antennas have been developed. As a further evolution of the CTS array antenna, the all-metal ultra-wideband CTS antenna inherits the original high efficiency of the CTS array antenna and can also achieve low profile, ultra-wideband and strong scalability. At present, the all-metal ultra-wideband CTS antenna has been widely used in multi-band multi-functional wireless satellite communication systems.

[0003] The traditional all-metal ultra-wideband CTS antenna includes a linear source generator LSG (linear source generator), multiple vertical PPW (parallel-plate waveguide) power divider networks and multiple CTS radiation slots. The number of vertical PPW power divider networks is equal to that of CTS radiation slots, and the multiple vertical PPW power divider networks are connected to the multiple CTS radiation slots in a one-to-one correspondence. The LSG is used to convert the TE10 mode into a quasi-TEM wave and then feed it into the multiple vertical PPW power divider networks. The multiple vertical PPW power divider networks transmit the quasi-TEM waves transmitted therein to the multiple CTS radiation slots in a one-to-one correspondence. The multiple CTS radiation slots radiate the quasi-TEM waves transmitted therein to the free space. In the traditional all-metal ultra-wideband CTS antenna, the quasi-TEM wave propagation mode is air medium conduction mode.

[0004] However, the above-mentioned traditional all-metal ultra-wideband CTS antenna has the following problems: First, as the number of CTS radiation slots increases, the number of vertical PPW power divider networks also increases, thereby increasing the number of metal layers of the vertical PPW network; although the increase in the number of CTS radiation slots can improve the gain, the increase in the number of vertical PPW power divider networks will make the antenna manufacturing and assembly difficult, thus failing to achieve a low profile, which is not conducive to the expansion of the antenna array; Second, whether the line source generator LSG is based on a column box coupler or a multi-port excitation PPW structure, it needs to be fed into the vertical PPW power divider network before being transmitted to the CTS radiation slot. Therefore, the quasi-TEM wave generated by the line source generator LSG needs to propagate through a long path to reach the CTS radiation slot. During the propagation process of the vertical PPW power divider, the quasi-TEM wave will be reflected and superimposed at the vertical PPW power divider, thereby affecting the quality of the quasi-TEM wave and reducing the overall efficiency of the antenna.

[0005] Therefore, based on the CTS antenna theory and combined with the basic principles of the power divider, designing an ultra-wideband antenna that can achieve low profile and high efficiency is of great significance for the development of multi-band multi-functional wireless satellite communication systems. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide an all-metal ultra-wideband CTS antenna which is easy to manufacture and assemble and can achieve a low profile and high efficiency.

[0007] The technical solution adopted by the present invention to solve the above technical problems is: an all-metal ultra-wideband CTS antenna, comprising a radiation layer, a line source generator layer, a back cavity power divider layer and a planar single-ridge power divider layer arranged in order from top to bottom, the planar single-ridge power divider layer is used to receive a TE10 mode and transmit the TE10 mode to the back cavity power divider layer in equal parts, the back cavity power divider layer is used to transmit the TE10 mode and feed the TE10 mode to the line source generator layer to excite the line source generator layer, the line source generator layer is used to convert the TE10 mode fed thereto into a quasi-TEM mode and then transmit it, and finally couple the quasi-TEM mode to the radiation layer, the radiation layer is used to radiate the quasi-TEM mode transmitted thereto into free space, the planar single-ridge power divider layer, the back cavity power divider layer and the line source generator layer constitute a broadband feeding network for feeding the quasi-TEM mode to the radiation layer; the radiation layer comprises a first metal plate and a CTS radiation slot group arranged on the first metal plate, the CTS radiation slot group is composed of The first metal plate is composed of 8 CTS radiation slits perpendicular to the first metal plate, the 8 CTS radiation slits are arranged in equal intervals from front to back, the spacing between any two adjacent CTS radiation slits is 9mm, the width of each CTS radiation slit is 6.5mm, and the 8 CTS radiation slits are respectively realized by opening a hollow T-section air groove on the first metal plate; the line source generator layer includes a second metal plate and 8 line source generators with the same structural size arranged on the second metal plate, the second metal plate is located below the first metal plate, the 8 line source generators are connected to the 8 CTS radiation slits in a one-to-one correspondence, the 8 line source generators are respectively realized by opening grooves on the second metal plate, and the 8 line source generators are respectively realized by using a PPW structure based on multi-port excitation; the 8 line source generators are respectively called a first line source generator, a second line source generator, a third line source generator, a fourth line source generator, a fifth line source generator, a sixth line source generator, a seventh line source generator and an eighth line source generator;The back cavity power divider layer includes a third metal plate and four back cavity power divider groups arranged on the third metal plate, the four back cavity power divider groups are arranged at equal intervals from left to right, each of the back cavity power divider groups is composed of four 1-to-4 back cavity power dividers arranged at equal intervals from front to back, each of the 1-to-4 back cavity power dividers is composed of a single ridge waveguide and is realized by grooving the third metal plate, each of the 1-to-4 back cavity power dividers has one input port and four output ports, and the four 1-to-4 back cavity power dividers are respectively referred to as first 1-to-4 back cavity power dividers. , a second 1-to-4 back cavity power divider, a third 1-to-4 back cavity power divider and a fourth 1-to-4 back cavity power divider, the four back cavity power divider groups are respectively referred to as a first back cavity power divider group, a second back cavity power divider group, a third back cavity power divider group and a fourth back cavity power divider group, the first and second output ports of the first 1-to-4 back cavity power divider, the first and second output ports of the second 1-to-4 back cavity power divider, the first and second output ports of the third 1-to-4 back cavity power divider and the first and second output ports of the fourth 1-to-4 back cavity power divider in the first back cavity power divider group are all connected to the first line source generator;The third and fourth output ports of the first 1-in-4 back cavity power divider, the third and fourth output ports of the second 1-in-4 back cavity power divider, the third and fourth output ports of the third 1-in-4 back cavity power divider, and the third and fourth output ports of the fourth 1-in-4 back cavity power divider in the first back cavity power divider group are all connected to the second line source generator, and the first and second output ports of the first 1-in-4 back cavity power divider, the first and second output ports of the second 1-in-4 back cavity power divider, the first and second output ports of the third 1-in-4 back cavity power divider, and the first and second output ports of the fourth 1-in-4 back cavity power divider in the second back cavity power divider group are all connected to the third line source generator The third and fourth output ports of the first 1-to-4 back cavity power divider in the second back cavity power divider group, the third and fourth output ports of the second 1-to-4 back cavity power divider, the third and fourth output ports of the third 1-to-4 back cavity power divider, and the third and fourth output ports of the fourth 1-to-4 back cavity power divider are all connected to the fourth line source generator, and the first and second output ports of the first 1-to-4 back cavity power divider in the third back cavity power divider group, the first and second output ports of the second 1-to-4 back cavity power divider, the first and second output ports of the third 1-to-4 back cavity power divider, and the first and second output ports of the fourth 1-to-4 back cavity power divider are all connected to the fifth line source generator. The generator is connected, the 3rd and 4th output ports of the first 1-to-4 back cavity power divider in the third back cavity power divider group, the 3rd and 4th output ports of the second 1-to-4 back cavity power divider, the 3rd and 4th output ports of the third 1-to-4 back cavity power divider and the 3rd and 4th output ports of the fourth 1-to-4 back cavity power divider are all connected to the sixth line source generator, the 1st and 2nd output ports of the first 1-to-4 back cavity power divider in the fourth back cavity power divider group, the 1st and 2nd output ports of the second 1-to-4 back cavity power divider, the 1st and 2nd output ports of the third 1-to-4 back cavity power divider and the 1st and 2nd output ports of the fourth 1-to-4 back cavity power divider are all connected to the first The seven-line source generator is connected, the third and fourth output ports of the first 1-to-4 back cavity power divider in the fourth back cavity power divider group, the third and fourth output ports of the second 1-to-4 back cavity power divider, the third and fourth output ports of the third 1-to-4 back cavity power divider and the third and fourth output ports of the fourth 1-to-4 back cavity power divider are all connected to the eighth line source generator; the planar single-ridge power divider layer includes a fourth metal plate, a standard coaxial port arranged on the fourth metal plate and a 1-to-16 single-ridge power divider arranged on the fourth metal plate, the fourth metal plate is located below the third metal plate, and the 1-to-16 single-ridge power divider is an equal-amplitude and in-phase power divider;The 1-to-16 single-ridge power divider has 1 input port and 16 output ports, the standard coaxial port and the input port of the 1-to-16 single-ridge power divider are connected through a 3rd-order flared impedance transformer, the 1-to-16 single-ridge power divider is realized by slotting the fourth metal plate, the 1-to-16 single-ridge power divider is composed of 4 1-to-4 single-ridge power dividers, each 1-to-4 single-ridge power divider has 1 input port and 4 output ports, the input ports of the 4 1-to-4 single-ridge power dividers are connected and their connection ends serve as the 1-to-16 single-ridge The input port of the power splitter, the 4 output ports of the 4 1-to-4 single-ridge power splitters, a total of 16 output ports, are used as the 16 output ports of the 1-to-16 single-ridge power splitter; the output port of each 1-to-4 single-ridge power splitter is a rectangular waveguide adapter, and the 4 1-to-4 single-ridge power splitters are respectively called the first 1-to-4 single-ridge power splitter, the second 1-to-4 single-ridge power splitter, the third 1-to-4 single-ridge power splitter and the fourth 1-to-4 single-ridge power splitter, and the 4 output ports of the first 1-to-4 single-ridge power splitter are connected to the input ports of the 4 1-to-4 back cavity power splitters in the first back cavity power splitter group. The input ports are connected one-to-one, the four output ports of the second 1-to-4 single-ridge power splitter are connected one-to-one with the input ports of the four 1-to-4 back-cavity power splitters in the second back-cavity power splitter group, the four output ports of the third 1-to-4 single-ridge power splitter are connected one-to-one with the input ports of the four 1-to-4 back-cavity power splitters in the third back-cavity power splitter group, and the four output ports of the fourth 1-to-4 single-ridge power splitter are connected one-to-one with the input ports of the four 1-to-4 back-cavity power splitters in the fourth back-cavity power splitter group; each of the 1-to-4 single-ridge power splitters The invention is realized by sequentially cascading a plurality of H-plane single-ridge T-type junctions, a matching short section for improving input impedance matching is arranged at the center of each of the H-plane single-ridge T-type junctions, and in each of the 1-to-4 single-ridge power dividers, the H-plane single-ridge T-type junction used for connecting to the standard coaxial port is called the first H-plane single-ridge T-type junction, and the first H-plane single-ridge T-type junction is connected to the standard coaxial port through a metal ridge line coupling structure, and the metal ridge line coupling structure is connected to the fourth metal plate, and broadband impedance matching can be achieved by adjusting the thickness of the fourth metal plate;When the all-metal ultra-wideband CTS antenna realizes the transmitting function, the standard coaxial port is excited by the circuit to generate a quasi-TEM mode with a frequency of 17-32GHz, which is equally transmitted to the four 1-to-4 single-ridge power dividers in the 1-to-16 planar single-ridge power divider, and each 1-to-4 single-ridge power divider converts the quasi-TEM mode transmitted thereto into a TE10 mode and then equally transmits it to the back cavity power divider group connected thereto, wherein the first 1-to-4 single-ridge power divider equally transmits the TE10 mode to the four 1-to-4 back cavity power dividers in the first back cavity power divider group, the second 1-to-4 single-ridge power divider equally transmits the TE10 mode to the four 1-to-4 back cavity power dividers in the second back cavity power divider group, and the third 1-to-4 single-ridge power divider equally transmits the TE10 mode to the third back cavity power divider group Among the four 1-in-4 back cavity power dividers, the fourth 1-in-4 single ridge power divider transmits the TE10 mode equally to the four 1-in-4 back cavity power dividers in the fourth back cavity power divider group, the four 1-in-4 back cavity power dividers in the first back cavity power divider group, the four 1-in-4 back cavity power dividers in the second back cavity power divider group, the four 1-in-4 back cavity power dividers in the third back cavity power divider group, and the four 1-in-4 back cavity power dividers in the fourth back cavity power divider group respectively distribute the power of the TE10 mode transmitted thereto equally and feed it to the line source generator connected thereto, and the eight line source generators convert the TE10 mode fed thereto into a quasi-TEM mode and feed it to the radiation layer, and the quasi-TEM mode at the radiation layer forms a beam through each CTS radiation slit and radiates energy to the free space. ;

[0008] Compared with the prior art, the present invention has the advantage that by directly connecting the line source generator layer with the CTS radiation slot of the radiation layer, the vertical PPW power divider network is avoided, the back cavity power divider layer and the planar single ridge power divider are combined to form a broadband multi-channel power divider to excite the line source generator layer, and the quasi-TEM wave generated by the line source generator layer is directly fed to the CTS radiation slot of the radiation layer, which greatly improves the quality of the quasi-TEM wave, and the 1-to-4 single ridge power divider in the planar single ridge power divider layer is realized by cascading multiple H-plane single ridge T-junctions in sequence. Based on this fully parallel-fed topological structure, when the number of CTS radiation slots in the radiation layer increases, it is only necessary to horizontally extend the broadband feeding network composed of the planar single ridge power divider layer, the back cavity power divider layer and the line source generator layer without increasing the overall height of the CTS antenna, which significantly improves the efficiency of the CTS antenna and increases the bandwidth of the CTS antenna. The structure is more compact and the scalability of the CTS antenna is greatly improved. Therefore, the present invention is easy to manufacture and assemble, can achieve a low profile, and has high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 An overall diagram of an all-metal ultra-wideband CTS antenna of the present invention;

[0010] Figure 2 A burst diagram of an all-metal ultra-wideband CTS antenna of the present invention;

[0011] Figure 3 It is a right view of an all-metal ultra-wideband CTS antenna of the present invention;

[0012] Figure 4 A side view of a planar single-ridge power divider layer of an all-metal ultra-wideband CTS antenna of the present invention;

[0013] Figure 5 It is a simulation diagram of the peak gain, directivity and efficiency of an all-metal ultra-wideband CTS antenna of the present invention. DETAILED DESCRIPTION

[0014] The present invention is further described in detail below with reference to the accompanying drawings.

[0015] Example: Figure 1-Figure 4As shown, an all-metal ultra-wideband CTS antenna includes a radiation layer 1, a line source generator layer 2, a back cavity power divider layer 3 and a planar single-ridge power divider layer 4 arranged in order from top to bottom, the planar single-ridge power divider layer 4 is used to receive a TE10 mode and transmit the TE10 mode to the back cavity power divider layer 3 in equal parts, the back cavity power divider layer 3 is used to transmit the TE10 mode and feed the TE10 mode to the line source generator layer 2 to excite the line source generator layer 2, and the line source generator layer 2 is used to feed the TE10 mode fed thereto. After being converted into a quasi-TEM mode, it is transmitted, and finally the quasi-TEM mode is coupled to the radiation layer 1, the radiation layer 1 is used to radiate the quasi-TEM mode transmitted thereto into free space, the planar single-ridge power divider layer 4, the back cavity power divider layer 3 and the line source generator layer 2 constitute a broadband feeding network, which is used to feed the quasi-TEM mode to the radiation layer 1; the radiation layer 1 includes a first metal plate 5 and a CTS radiation slot 6 group arranged on the first metal plate 5, and the CTS radiation slot 6 group consists of 8 CTS radiation slots perpendicular to the first metal plate 5. The first metal plate 5 is composed of 8 CTS radiation slits 6, 8 CTS radiation slits 6 are arranged at equal intervals in sequence from front to back, the spacing between any two adjacent CTS radiation slits 6 is 9 mm, the width of each CTS radiation slit 6 is 6.5 mm, and the 8 CTS radiation slits 6 are respectively realized by opening a hollow T-section air slot on the first metal plate 5; the line source generator layer 2 includes a second metal plate 7 and 8 line source generators with the same structural size arranged on the second metal plate 7, the second metal plate 7 is located below the first metal plate 5, the 8 line source generators are connected to the 8 CTS radiation slits 6 in a one-to-one correspondence, the 8 line source generators are respectively realized by opening a slot on the second metal plate 7, and the 8 line source generators are respectively realized by adopting a PPW structure based on multi-port excitation; the 8 line source generators are respectively called a first line source generator 8, a second line source generator 9, a third line source generator 10, a fourth line source generator 11, a fifth line source generator 12, a sixth line source generator 13, a seventh line source generator 14 and an eighth line source generator 15;The back cavity power divider layer 3 includes a third metal plate 16 and four back cavity power divider groups arranged on the third metal plate 16. The four back cavity power divider groups are arranged at equal intervals from left to right. Each back cavity power divider group is composed of four 1-to-4 back cavity power dividers 28 arranged at equal intervals from front to back. Each 1-to-4 back cavity power divider 28 is composed of a single ridge waveguide and is realized by grooving the third metal plate 16. Each 1-to-4 back cavity power divider 28 has one input port and four output ports. The four 1-to-4 back cavity power dividers are respectively referred to as a first 1-to-4 back cavity power divider, a second 1-to-4 back cavity power divider, and a second 1-to-4 back cavity power divider. 4 back cavity power dividers, a third 1-to-4 back cavity power divider and a fourth 1-to-4 back cavity power divider, the four back cavity power divider groups are respectively called a first back cavity power divider group 17, a second back cavity power divider group 18, a third back cavity power divider group 19 and a fourth back cavity power divider group 20, the first and second output ports of the first 1-to-4 back cavity power divider, the first and second output ports of the second 1-to-4 back cavity power divider, the first and second output ports of the third 1-to-4 back cavity power divider and the first and second output ports of the fourth 1-to-4 back cavity power divider in the first back cavity power divider group 17 are all connected to the first line source generator 8;The third and fourth output ports of the first 1-to-4 back cavity power divider, the third and fourth output ports of the second 1-to-4 back cavity power divider, the third and fourth output ports of the third 1-to-4 back cavity power divider, and the third and fourth output ports of the fourth 1-to-4 back cavity power divider in the first back cavity power divider group 17 are all connected to the second line source generator 9, and the first and second output ports of the first 1-to-4 back cavity power divider, the first and second output ports of the second 1-to-4 back cavity power divider, the first and second output ports of the third 1-to-4 back cavity power divider, and the first and second output ports of the fourth 1-to-4 back cavity power divider in the second back cavity power divider group 18 are all connected to the third line source generator 10. The third and fourth output ports of the first 1-to-4 back cavity power divider in the second back cavity power divider group 18, the third and fourth output ports of the second 1-to-4 back cavity power divider, the third and fourth output ports of the third 1-to-4 back cavity power divider, and the third and fourth output ports of the fourth 1-to-4 back cavity power divider are all connected to the fourth line source generator 11, and the first and second output ports of the first 1-to-4 back cavity power divider, the first and second output ports of the second 1-to-4 back cavity power divider, the first and second output ports of the third 1-to-4 back cavity power divider, and the first and second output ports of the fourth 1-to-4 back cavity power divider in the third back cavity power divider group 19 are all connected to the fifth line source generator 12, the 3rd and 4th output ports of the first 1-to-4 back cavity power divider in the third back cavity power divider group 19, the 3rd and 4th output ports of the second 1-to-4 back cavity power divider, the 3rd and 4th output ports of the third 1-to-4 back cavity power divider and the 3rd and 4th output ports of the fourth 1-to-4 back cavity power divider are all connected to the sixth line source generator 13, and the 1st and 2nd output ports of the first 1-to-4 back cavity power divider in the fourth back cavity power divider group 20, the 1st and 2nd output ports of the second 1-to-4 back cavity power divider, the 1st and 2nd output ports of the third 1-to-4 back cavity power divider and the 1st and 2nd output ports of the fourth 1-to-4 back cavity power divider are all connected to the seventh line source generator 13. The generator 14 is connected, the 3rd and 4th output ports of the first 1-to-4 back cavity power divider in the fourth back cavity power divider group 20, the 3rd and 4th output ports of the second 1-to-4 back cavity power divider, the 3rd and 4th output ports of the third 1-to-4 back cavity power divider and the 3rd and 4th output ports of the fourth 1-to-4 back cavity power divider are all connected to the eighth line source generator 15; the planar single-ridge power divider layer 4 includes a fourth metal plate 21, a standard coaxial port 22 arranged on the fourth metal plate 21 and a 1-to-16 single-ridge power divider 23 arranged on the fourth metal plate 21, the fourth metal plate 21 is located below the third metal plate 16, and the 1-to-16 single-ridge power divider 23 is an equal-amplitude and in-phase power divider;The 1-to-16 single-ridge power divider 23 has 1 input port and 16 output ports. The standard coaxial port 22 and the input port of the 1-to-16 single-ridge power divider are connected through a 3rd-order flared impedance transformer 24. The 1-to-16 single-ridge power divider is realized by slotting the fourth metal plate 21. The 1-to-16 single-ridge power divider is composed of 4 1-to-4 single-ridge power dividers 25. Each 1-to-4 single-ridge power divider 25 has 1 input port and 4 output ports. The input ports of the 4 1-to-4 single-ridge power dividers 25 are connected and their connection ends are used as 1-to-16 single-ridge power dividers. The input port of the power divider 23 and the four output ports of the four 1-to-4 single-ridge power dividers 25, a total of 16 output ports, are used as the 16 output ports of the 1-to-16 single-ridge power divider 23; the output port of each 1-to-4 single-ridge power divider 25 is a rectangular waveguide adapter 26, and the four 1-to-4 single-ridge power dividers are respectively referred to as the first 1-to-4 single-ridge power divider, the second 1-to-4 single-ridge power divider, the third 1-to-4 single-ridge power divider and the fourth 1-to-4 single-ridge power divider, and the four output ports of the first 1-to-4 single-ridge power divider are connected to the four 1 The input ports of the 1-in-4 back cavity power splitters are connected one-to-one, the 4 output ports of the second 1-in-4 single-ridge power splitter are connected one-to-one with the input ports of the 4 1-in-4 back cavity power splitters in the second back cavity power splitter group 18, the 4 output ports of the third 1-in-4 single-ridge power splitter are connected one-to-one with the input ports of the 4 1-in-4 back cavity power splitters in the third back cavity power splitter group 19, and the 4 output ports of the fourth 1-in-4 single-ridge power splitter are connected one-to-one with the input ports of the 4 1-in-4 back cavity power splitters in the fourth back cavity power splitter group 20; each 1-in-4 single-ridge power splitter The invention is realized by sequentially cascading a plurality of H-plane single-ridge T-type junctions, and a matching short section for improving input impedance matching is arranged at the center of each H-plane single-ridge T-type junction. In each 1-to-4 single-ridge power divider, the H-plane single-ridge T-type junction used for connecting to the standard coaxial port 22 is called the first H-plane single-ridge T-type junction, and the first H-plane single-ridge T-type junction is connected to the standard coaxial port 22 through a metal ridge line coupling structure 27, and the metal ridge line coupling structure 27 is connected to the fourth metal plate 21. By adjusting the thickness of the fourth metal plate 21, broadband impedance matching can be achieved;When the all-metal ultra-wideband CTS antenna realizes the transmitting function, the standard coaxial port 22 is excited by the circuit to generate a quasi-TEM mode with a frequency of 17-32GHz, which is equally transmitted to the four 1-to-4 single-ridge power dividers in the 1-to-16 planar single-ridge power divider. Each 1-to-4 single-ridge power divider converts the quasi-TEM mode transmitted thereto into a TE10 mode and then equally transmits it to the back cavity power divider group connected thereto, wherein the first 1-to-4 single-ridge power divider equally transmits the TE10 mode to the four 1-to-4 back cavity power dividers in the first back cavity power divider group 17, the second 1-to-4 single-ridge power divider equally transmits the TE10 mode to the four 1-to-4 back cavity power dividers in the second back cavity power divider group 18, and the third 1-to-4 single-ridge power divider equally transmits the TE10 mode to the four 1-to-4 back cavity power dividers in the third back cavity power divider group 19. Among the four 1-to-4 back cavity power dividers, the fourth 1-to-4 single-ridge power divider transmits the TE10 mode equally to the four 1-to-4 back cavity power dividers in the fourth back cavity power divider group 20, the four 1-to-4 back cavity power dividers in the first back cavity power divider group 17, the four 1-to-4 back cavity power dividers in the second back cavity power divider group 18, the four 1-to-4 back cavity power dividers in the third back cavity power divider group 19, and the four 1-to-4 back cavity power dividers in the fourth back cavity power divider group 20 respectively distribute the power of the TE10 mode transmitted thereto equally and feed it to the line source generators connected thereto, and the eight line source generators convert the TE10 mode fed thereto into a quasi-TEM mode and feed it to the radiation layer 1, and the quasi-TEM mode at the radiation layer 1 forms a beam through each CTS radiation slit 6 and radiates energy to the free space. ;

[0016] The peak gain, directivity and efficiency simulation diagram of an all-metal ultra-wideband CTS antenna of the present invention are shown in FIG. Figure 5 shown. Figure 5 In the above figure, Simulated efficiency is the efficiency simulation curve of CTS antenna, Simulated peak gain is the peak gain simulation curve of CTS antenna, and Simulated directivity is the directivity simulation curve of CTS antenna; Analysis Figure 5 It can be seen that within the frequency range of 17-32 GHz, the peak gain of the present invention varies between 23.2-28.4 dBi, the efficiency reaches 85%, and the directivity varies between 23.3-28.34 dBi. Therefore, the present invention has a higher peak gain, higher efficiency and a good radiation pattern.

Claims

1. An all-metal ultra-wideband CTS antenna, comprising a radiation layer, a line source generator layer, a back cavity power divider layer and a planar single ridge power divider layer arranged in order from top to bottom, Features The planar single-ridge power divider layer is used to receive the TE10 mode and transmit the TE10 mode to the back cavity power divider layer in equal parts. The back cavity power divider layer is used to transmit the TE10 mode and feed the TE10 mode to the line source generator layer to stimulate the line source generator layer. The line source generator layer is used to convert the TE10 mode fed thereto into a quasi-TEM mode for transmission, and finally couple the quasi-TEM mode to the radiation layer. The radiation layer is used to radiate the quasi-TEM mode transmitted thereto into free space. The planar single-ridge power divider layer, the back cavity power divider layer and the line The source generator layer constitutes a broadband feeding network for feeding the quasi-TEM mode to the radiation layer; the radiation layer comprises a first metal plate and a CTS radiation slit group arranged on the first metal plate, the CTS radiation slit group consists of 8 CTS radiation slits perpendicular to the first metal plate, the 8 CTS radiation slits are arranged at equal intervals in a sequence from front to back, the spacing between any two adjacent CTS radiation slits is 9 mm, the width of each CTS radiation slit is 6.5 mm, and the 8 CTS radiation slits are respectively realized by opening hollow T-section air slots on the first metal plate; The line source generator layer includes a second metal plate and 8 line source generators with the same structural size arranged on the second metal plate, the second metal plate is located below the first metal plate, the 8 line source generators are connected to the 8 CTS radiation slots one by one, the 8 line source generators are respectively realized by slotting the second metal plate, and the 8 line source generators are respectively realized by using a PPW structure based on multi-port excitation; the 8 line source generators are respectively called a first line source generator, a second line source generator, a third line source generator, a fourth line source generator, a fifth line source generator, a sixth line source generator, a seventh line source generator and an eighth line source generator; The back cavity power divider layer includes a third metal plate and four back cavity power divider groups arranged on the third metal plate, the four back cavity power divider groups are arranged at equal intervals from front to back, each of the back cavity power divider groups is composed of four 1-to-4 back cavity power dividers arranged at equal intervals from left to right, each of the 1-to-4 back cavity power dividers is composed of a single ridge waveguide and is realized by grooving the third metal plate, each of the 1-to-4 back cavity power dividers has one input port and four output ports, and the four 1-to-4 back cavity power dividers are respectively referred to as first 1-to-4 back cavity power dividers. , a second 1-to-4 back cavity power divider, a third 1-to-4 back cavity power divider and a fourth 1-to-4 back cavity power divider, the four back cavity power divider groups are respectively referred to as a first back cavity power divider group, a second back cavity power divider group, a third back cavity power divider group and a fourth back cavity power divider group, the first and second output ports of the first 1-to-4 back cavity power divider, the first and second output ports of the second 1-to-4 back cavity power divider, the first and second output ports of the third 1-to-4 back cavity power divider and the first and second output ports of the fourth 1-to-4 back cavity power divider in the first back cavity power divider group are all connected to the first line source generator;The third and fourth output ports of the first 1-in-4 back cavity power divider, the third and fourth output ports of the second 1-in-4 back cavity power divider, the third and fourth output ports of the third 1-in-4 back cavity power divider and the third and fourth output ports of the fourth 1-in-4 back cavity power divider in the first back cavity power divider group are all connected to the second line source generator, and the first and second output ports of the first 1-in-4 back cavity power divider, the first and second output ports of the second 1-in-4 back cavity power divider, the first and second output ports of the third 1-in-4 back cavity power divider and the fourth 1-in-4 back cavity power divider in the second back cavity power divider group are all connected to the second line source generator. The first and second output ports of the power divider are both connected to the third line source generator, the third and fourth output ports of the first 1-to-4 back cavity power divider in the second back cavity power divider group, the third and fourth output ports of the second 1-to-4 back cavity power divider, the third and fourth output ports of the third 1-to-4 back cavity power divider and the third and fourth output ports of the fourth 1-to-4 back cavity power divider are all connected to the fourth line source generator, the first and second output ports of the first 1-to-4 back cavity power divider in the third back cavity power divider group, the first and second output ports of the second 1-to-4 back cavity power divider, the third and fourth output ports of the third 1-to-4 back cavity power divider The first and second output ports of the third 1-in-4 back cavity power splitter and the first and second output ports of the fourth 1-in-4 back cavity power splitter are all connected to the fifth line source generator, the third and fourth output ports of the first 1-in-4 back cavity power splitter in the third back cavity power splitter group, the third and fourth output ports of the second 1-in-4 back cavity power splitter, the third and fourth output ports of the third 1-in-4 back cavity power splitter and the third and fourth output ports of the fourth 1-in-4 back cavity power splitter are all connected to the sixth line source generator, the first and second output ports of the first 1-in-4 back cavity power splitter in the fourth back cavity power splitter group The first and second output ports of the second 1-in-4 back cavity power splitter, the first and second output ports of the third 1-in-4 back cavity power splitter and the first and second output ports of the fourth 1-in-4 back cavity power splitter are all connected to the seventh line source generator, the third and fourth output ports of the first 1-in-4 back cavity power splitter in the fourth back cavity power splitter group, the third and fourth output ports of the second 1-in-4 back cavity power splitter, the third and fourth output ports of the third 1-in-4 back cavity power splitter and the third and fourth output ports of the fourth 1-in-4 back cavity power splitter are all connected to the eighth line source generator; The planar single-ridge power divider layer includes a fourth metal plate, a standard coaxial port arranged on the fourth metal plate, and a 1-to-16 single-ridge power divider arranged on the fourth metal plate, wherein the fourth metal plate is located below the third metal plate, and the 1-to-16 single-ridge power divider is an equal-amplitude and in-phase power divider; the 1-to-16 single-ridge power divider has 1 input port and 16 output ports, the standard coaxial port and the input port of the 1-to-16 single-ridge power divider are connected through a 3rd-order flared impedance transformer, the 1-to-16 single-ridge power divider is realized by slotting the fourth metal plate, and the 1-to-1 The 6 single-ridge power splitter is composed of 4 1-to-4 single-ridge power splitters, each of which has 1 input port and 4 output ports. The input ports of the 4 1-to-4 single-ridge power splitters are connected and their connection ends are used as the input port of the 1-to-16 single-ridge power splitter. The 4 output ports of the 4 1-to-4 single-ridge power splitters, a total of 16 output ports, are used as the 16 output ports of the 1-to-16 single-ridge power splitter; the output port of each 1-to-4 single-ridge power splitter is a rectangular waveguide adapter, and the 4 1-to-4 single-ridge power splitters are respectively referred to as the first 1-to-4 single-ridge power splitter, the second 1-to-4 single-ridge power splitter, the third 1-to-4 single-ridge power splitter and the fourth 1-to-4 single-ridge power splitter, the 4 output ports of the first 1-to-4 single-ridge power splitter are connected one-to-one with the input ports of the 4 1-to-4 back cavity power splitters in the first back cavity power splitter group, the 4 output ports of the second 1-to-4 single-ridge power splitter are connected one-to-one with the input ports of the 4 1-to-4 back cavity power splitters in the second back cavity power splitter group, the 4 output ports of the third 1-to-4 single-ridge power splitter are connected one-to-one with the input ports of the 4 1-to-4 back cavity power splitters in the third back cavity power splitter group, the 4 output ports of the fourth 1-to-4 single-ridge power splitter are connected one-to-one with the input ports of the 4 1-to-4 back cavity power splitters in the fourth back cavity power splitter group The input ports of the devices are connected one by one; each of the 1-to-4 single-ridge power splitters is realized by sequentially cascading a plurality of H-plane single-ridge T-junctions, and a matching short section for improving input impedance matching is arranged at the center of each of the H-plane single-ridge T-junctions. In each of the 1-to-4 single-ridge power splitters, the H-plane single-ridge T-junction used for connecting to the standard coaxial port is called the first H-plane single-ridge T-junction, and the first H-plane single-ridge T-junction is connected to the standard coaxial port through a metal ridge coupling structure, and the metal ridge coupling structure is connected to the fourth metal plate, and broadband impedance matching can be achieved by adjusting the thickness of the fourth metal plate; When the all-metal ultra-wideband CTS antenna realizes the transmitting function, the standard coaxial port is excited by the circuit to generate a quasi-TEM mode with a frequency of 17-32GHz, which is equally transmitted to the four 1-to-4 single-ridge power dividers in the 1-to-16 planar single-ridge power divider, and each 1-to-4 single-ridge power divider converts the quasi-TEM mode transmitted thereto into a TE10 mode and then equally transmits it to the back cavity power divider group connected thereto, wherein the first 1-to-4 single-ridge power divider equally transmits the TE10 mode to the four 1-to-4 back cavity power dividers in the first back cavity power divider group, the second 1-to-4 single-ridge power divider equally transmits the TE10 mode to the four 1-to-4 back cavity power dividers in the second back cavity power divider group, and the third 1-to-4 single-ridge power divider equally transmits the TE10 mode to the third back cavity power divider group Among the 4 1-in-4 back cavity power dividers, the fourth 1-in-4 single-ridge power divider equally transmits the TE10 mode to the 4 1-in-4 back cavity power dividers in the fourth back cavity power divider group, the 4 1-in-4 back cavity power dividers in the first back cavity power divider group, the 4 1-in-4 back cavity power dividers in the second back cavity power divider group, the 4 1-in-4 back cavity power dividers in the third back cavity power divider group and the 4 1-in-4 back cavity power dividers in the fourth back cavity power divider group equally distribute the power of the TE10 mode transmitted thereat and feed it to the line source generator connected thereto, the 8 line source generators convert the TE10 mode fed thereto into a quasi-TEM mode and then feed it into the radiation layer, the quasi-TEM mode at the radiation layer forms a beam through each CTS radiation slit and radiates energy to the free space.

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