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Broadband low-profile high-isolation dual-circular polarization two-dimensional wide-angle scanning sparse array

A high-isolation, sparse array technology, applied in antenna arrays, specific array feeding systems, radiating element structures, etc., can solve the problems of less research on sparse arrays and the inability of arrays to achieve wide-angle scanning, reducing the number of, The effect of increasing impedance bandwidth and reducing cost

Active Publication Date: 2020-12-11
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0006] Literature "Circularly-Polarized Sparse Arrays Realized by Randomly-Rotated Linearly-Polarized Antennas" (Smolders A, Geluk S, Reniers A. Circularly-Polarized Sparse Arrays Realized by Randomly-Rotated Linearly-Polarized Antennas[J]. IEEE Antennas and Wireless Propagation Letters, 2016,16:736-739.) proposed a circularly polarized sparse array composed of linearly polarized antenna elements arranged in random rotation, which can achieve low sidelobes and low cross-polarization levels, but The array cannot achieve wide-angle scanning
[0007] At this stage, there are still relatively few studies on sparse arrays with dual circular polarization, and further research is needed on how to realize circularly polarized wide-angle scanning

Method used

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  • Broadband low-profile high-isolation dual-circular polarization two-dimensional wide-angle scanning sparse array
  • Broadband low-profile high-isolation dual-circular polarization two-dimensional wide-angle scanning sparse array
  • Broadband low-profile high-isolation dual-circular polarization two-dimensional wide-angle scanning sparse array

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Embodiment Construction

[0038] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0039] The structure of the dual circularly polarized antenna unit in this embodiment is as follows figure 1 As shown, while ensuring good port isolation, dual circular polarization with wide bandwidth axial ratio beamwidth can be realized. The antenna unit includes a first dielectric substrate, a ground plate, and a second dielectric substrate stacked from top to bottom, a radiator is provided on the upper surface of the first dielectric substrate, and a feeder is provided on the lower surface of the second dielectric substrate. network. The feed network includes a three-section coupled line directional coupler, two bent input microstrip lines, and two bent output microstrip lines, and the three-section coupled line directional coupler is arranged in the middle of the lower surface of the second dielectric substrate , wherein the second coup...

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Abstract

The invention discloses a broadband low-profile high-isolation dual-circular polarization two-dimensional wide-angle scanning sparse array, and belongs to the technical field of microwave antennas. The sparse array is composed of periodically arranged dual-port antenna units, and activated antenna unit ports at different scanning angles are optimized through a genetic algorithm, so that the gain of a main wave beam of the sparse array during working is reduced by less than or equal to 0.5 dB compared with the gain of a main wave beam during full array. An SIW back cavity type structure is adopted in the antenna unit, a three-section coupling line directional coupler is adopted at the same time, and a second section of coupling line gap is a sawtooth-shaped gap. According to the dual-circular polarization sparse array, dual-circular polarization two-dimensional wide-angle scanning can be achieved, and the purpose of achieving the effect close to a full array can be achieved through a small number of T / R assemblies.

Description

technical field [0001] The invention belongs to the technical field of microwave antennas, and in particular relates to a wide-band low-profile high-isolation double-circular polarization two-dimensional wide-angle scanning sparse array. Background technique [0002] The antenna is the front end of the wireless communication system and is a device used to transmit or receive electromagnetic waves. In recent years, the development of communication technology has put forward higher requirements on the performance of antennas. The phased array antenna array composed of antenna units in a specific arrangement can obtain the deflection of the array beam by adding an appropriate phase shift (or delay) to each unit, and can realize fast beam scanning and multi-beam scanning and flexible beam pointing. In the field of satellite communications, linearly polarized antennas have problems of polarization mismatch, multipath interference, and Faraday rotation effects. Since circularly...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/38H01Q1/48H01Q1/50H01Q21/00H01Q21/29
CPCH01Q1/38H01Q1/48H01Q1/50H01Q21/0006H01Q21/0075H01Q21/293
Inventor 丁霄王阳
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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