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A wideband dual-polarization phased array antenna and full-polarization beamforming method

A phased array antenna, dual-polarization technology, which is applied in the combination of antenna units with different polarization directions, the structural connection of antenna grounding switches, and the structural form of radiating elements. It can solve the problem of narrow signal bandwidth and single polarization of phased array radar. methods, etc., to achieve the effect of reducing the voltage standing wave ratio, simple and reliable structure, and good isolation characteristics

Active Publication Date: 2020-07-14
HARBIN INST OF TECH AT WEIHAI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional phased array radar usually adopts a single polarization mode and a relatively narrow signal bandwidth

Method used

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  • A wideband dual-polarization phased array antenna and full-polarization beamforming method
  • A wideband dual-polarization phased array antenna and full-polarization beamforming method
  • A wideband dual-polarization phased array antenna and full-polarization beamforming method

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Experimental program
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Embodiment 1

[0173] The present invention designs a specific broadband dual-polarization phased array antenna unit, adopts the designed antenna unit to form an eight-unit linear scanning array, and adopts full-wave electromagnetic simulation software to perform performance analysis on the broadband dual-polarization phased array antenna Simulation, define the ports corresponding to the slots on the xoz plane as the polarization ports in the x direction, and the corresponding port numbers are ports 1, 3, 5, 7, 9, 11, 13, 15; the ports corresponding to the slots on the yoz plane are The polarized ports in the y direction correspond to port numbers 2, 4, 6, 8, 10, 12, 14, and 16; the return loss characteristics of these ports are shown in Figure 6 to Figure 14 respectively. It can be seen from the figure that the average return loss of the antenna in the frequency range of 2GHz to 6GHz is about -10dB, which can meet the application requirements of practical broadband dual-polarization electron...

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Abstract

The invention relates to the field of microwave and antenna technology, in particular to a broadband dual-polarization phased array antenna and a full-polarization beamforming method, which is characterized in that more than two antenna units are provided, and the antenna units are made of pure metal It is composed of a metal cavity surrounded by a base plate and four metal walls fixed around the base plate, and an antenna with a broadband tapered slot structure and two polarization ports placed orthogonally in the metal cavity. The bottom of the antenna is provided with a For the waveguide cavity that realizes the impedance matching function, the antenna is composed of four metal ridges arranged in a cross shape. The metal ridges are made of metal plates. The edge close to the center of the cross is a convex arc, and the four metal ridges form a radiation gap that gradually increases from bottom to top at the center of the cross. The antenna uses the bottom feed of the coaxial line. The coaxial lines of the port 2 respectively lead out to the bottom plate of the metal cavity.

Description

Technical field: [0001] The invention relates to the technical field of microwaves and antennas, in particular to a broadband dual-polarization phased array antenna and a full-polarization beamforming method that can be used in radio systems such as radar and communication. Background technique: [0002] Phased array antenna is an important part of phased radar. With the rapid development of electronic technology and the constant change of the electromagnetic signal environment, the antenna has become an important part of the signal processing system. It not only needs to have the function of processing frequency, phase, and amplitude, but also needs to have the ability to control the beam direction and polarization. ability. There are many forms of optional array elements for phased array antennas. One is the line elements evolved from dipole or monopole line antennas, such as sleeve dipoles, folded oscillators, and microstrip printed dipoles. Sub, broadband gradient cut,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q21/24H01Q1/36H01Q1/50
Inventor 宋立众李嘉聂玉明丁畅林涛
Owner HARBIN INST OF TECH AT WEIHAI
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