CN-122000705-A - Dual-circular polarization flat-panel array antenna and processing method thereof

CN122000705ACN 122000705 ACN122000705 ACN 122000705ACN-122000705-A

Abstract

The invention discloses a dual-circular polarized flat panel array antenna and a processing method thereof, which relate to the field of flat panel array antennas and are used for realizing miniaturization, low-cost design and processing of the dual-circular polarized flat panel array antenna. In the dual-circular polarization flat panel array antenna, a radiation unit array is connected with an input port array of a dual-circular polarizer array, a first output port array of the dual-circular polarizer array is respectively connected with each output port of a first sealed microstrip power division network, a second output port array of the circular polarizer array is respectively connected with each output port of a second sealed microstrip power division network so as to realize conversion from a waveguide to a microstrip line, and a public port of the first sealed microstrip power division network and a public port of the second sealed microstrip power division network are respectively connected with a waveguide port so as to realize conversion from the microstrip line to the waveguide. The invention has the characteristics of low cost, miniaturization, convenient assembly and the like.

Inventors

XUE SONG
ZHONG JIE
Ye Jiashuai
Liu Lianbiao
TAN LIANG
SUN YUBIN
YANG FENG

Assignees

江苏卫莱通信技术有限公司

Dates

Publication Date: 20260508
Application Date: 20260325

Claims (10)

1. The dual-circular polarization flat panel array antenna is characterized by comprising a radiation unit array, a dual-circular polarizer array, a first sealed microstrip power division network, a second sealed microstrip power division network and two waveguide ports; The first output port array of the double circular polarizer array is respectively connected with each output port of the first sealed microstrip power division network, the second output port array of the circular polarizer array is respectively connected with each output port of the second sealed microstrip power division network so as to realize conversion from a waveguide to a microstrip line, and the public port of the first sealed microstrip power division network and the public port of the second sealed microstrip power division network are respectively connected with one waveguide port so as to realize conversion from the microstrip line to the waveguide.
2. The dual circularly polarized planar array antenna of claim 1, wherein the first sealed microstrip power divider network comprises a first sealed cavity and a first microstrip power divider, wherein the first microstrip power divider is sealed in the first sealed cavity; The second sealed microstrip power division network comprises a second sealed cavity and a second microstrip power divider, and the second microstrip power divider is sealed in the second sealed cavity.
3. The dual circularly polarized planar array antenna of claim 2, wherein the first sealed cavity and the second sealed cavity are disposed on opposite sides of a spacer plate, the first sealed cavity and the second sealed cavity sharing the spacer plate to effect sealing.
4. The dual circularly polarized planar array antenna of claim 3, wherein the first sealed cavity comprises a first sealed plate, the first sealed plate and a first side of the isolator plate interfacing to form the first sealed cavity, the first microstrip power divider sandwiched between the first sealed plate and the first side of the isolator plate; the second sealed cavity comprises a second sealing plate, the second sealing plate is in butt joint with the second side of the isolation plate to form the second sealed cavity, and the second microstrip power divider is clamped between the second sealing plate and the second side of the isolation plate.
5. The dual circularly polarized planar array antenna of claim 4, wherein the first sealed cavity is formed on a first side of the spacer plate and/or the first seal plate, and the second sealed cavity is formed on a second side of the spacer plate and/or the second seal plate.
6. The dual circularly polarized planar array antenna of claim 4 or 5, wherein the first sealing plate is integrally connected to the bottom of the dual circularly polarized array, and the two waveguide ports are opened on the second sealing plate.
7. The dual circularly polarized planar array antenna as claimed in any one of claims 2-5, wherein the first microstrip power divider is disposed on a first dielectric substrate, the second microstrip power divider is disposed on a second dielectric substrate, and the first dielectric substrate and the second dielectric substrate have the same structure.
8. The dual circularly polarized planar array antenna of claim 7, wherein the first microstrip power divider and the second microstrip power divider are each formed by stepwise coupling of multiple stages of microstrip two power dividers.
9. The dual circularly polarized planar array antenna as claimed in any one of claims 2-5, wherein the first sealed cavity comprises a first rectangular waveguide corresponding to the common port of the first microstrip power divider and a second rectangular waveguide array corresponding to each output port of the first microstrip power divider, respectively; The second sealed cavity comprises a third rectangular waveguide corresponding to the public port of the second microstrip power divider and a fourth rectangular waveguide array corresponding to each output port of the second microstrip power divider respectively.
10. A method of manufacturing a dual circularly polarized planar array antenna according to any one of claims 2 to 9, comprising: A radiation unit array is arranged on the radiation layer; a double circular polarizer array is arranged on the top of the circular polarization layer; Processing a first sealing plate at the bottom of the circularly polarized layer; A first sealing cavity is formed in the bottom of the first sealing plate and/or the top of the isolation plate; a second sealing cavity is formed at the top of the second sealing plate and/or the bottom of the isolation plate; Two waveguide ports are formed in the second sealing plate; Preparing a first microstrip power divider and a second microstrip power divider respectively; Clamping the first microstrip power divider between the bottom of the first sealing plate and the top of the isolation plate; clamping the second microstrip power divider between the bottom of the isolation plate and the top of the second sealing plate; And screwing the second sealing plate, the isolation plate, the circular polarization layer and the radiation layer into a whole.

Description

Dual-circular polarization flat-panel array antenna and processing method thereof Technical Field The invention relates to the technical field of flat panel array antennas, in particular to a dual circularly polarized flat panel array antenna and a processing method thereof. Background In the design of the planar antenna, the dual-polarization high-frequency planar antenna usually adopts a waveguide horn array, and the dual-circular polarization array antenna usually uses a partition plate type circular polarizer to cooperate with a waveguide network to process a broadband dual-circular polarization array, wherein the waveguide network mainly uses the bandwidth of a ridge waveguide network to be the widest. The planar antenna is thicker due to the complete adoption of the waveguide network structure, and basically can be manufactured only by a milling process, so that the planar antenna is high in cost and heavy in weight. In addition, due to the adoption of the waveguide network structure, the array interval is large, and side lobes can be reduced only by adopting a cross or round hole mode and the like so as to improve the antenna performance. Doing so in turn reduces the bandwidth of the antenna. Broadband ultra-thin antennas are currently a bottleneck in industry development. In order to reduce the thickness of the flat-panel array antenna, a known mode is to use a dual-linear polarized array antenna to be matched with a waveguide bridge to realize a dual-circular polarized array antenna, but for a large-scale array, the mode is difficult to ensure the phase consistency of two waveguide networks, so that the axial ratio data of the circular polarized network is poor, and the fundamental problem cannot be solved. Disclosure of Invention The invention aims to provide a dual circular polarization flat panel array antenna and a processing method thereof, aiming at all or part of the problems, so as to realize miniaturization, low-cost design and processing of the dual circular polarization flat panel array antenna. The technical scheme adopted by the invention is as follows: A dual circular polarization flat panel array antenna comprises a radiation unit array, a dual circular polarizer array, a first sealed microstrip power division network, a second sealed microstrip power division network and two waveguide ports; The first output port array of the double circular polarizer array is respectively connected with each output port of the first sealed microstrip power division network, the second output port array of the circular polarizer array is respectively connected with each output port of the second sealed microstrip power division network so as to realize conversion from a waveguide to a microstrip line, and the public port of the first sealed microstrip power division network and the public port of the second sealed microstrip power division network are respectively connected with one waveguide port so as to realize conversion from the microstrip line to the waveguide. Optionally, the first sealed microstrip power division network comprises a first sealed cavity and a first microstrip power divider, wherein the first microstrip power divider is sealed in the first sealed cavity; The second sealed microstrip power division network comprises a second sealed cavity and a second microstrip power divider, and the second microstrip power divider is sealed in the second sealed cavity. Optionally, the first sealing cavity and the second sealing cavity are disposed on opposite sides of the isolation board, and the first sealing cavity and the second sealing cavity share the isolation board to achieve sealing. Optionally, the first sealing cavity includes a first sealing plate, the first sealing plate and a first side of the isolation plate are abutted to form the first sealing cavity, and the first microstrip power divider is sandwiched between the first sealing plate and the first side of the isolation plate; the second sealed cavity comprises a second sealing plate, the second sealing plate is in butt joint with the second side of the isolation plate to form the second sealed cavity, and the second microstrip power divider is clamped between the second sealing plate and the second side of the isolation plate. Optionally, the first sealing cavity is arranged on the first side of the isolation plate and/or the first sealing plate, and the second sealing cavity is arranged on the second side of the isolation plate and/or the second sealing plate. Optionally, the first sealing plate is integrally connected with the bottom of the dual circular polarizer array, and the two waveguide ports are arranged on the second sealing plate. Optionally, the first microstrip power divider is arranged on a first dielectric substrate, the second microstrip power divider is arranged on a second dielectric substrate, and the first dielectric substrate and the second dielectric substrate have the same structure. Optionally, the fir