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Broadband dual-polarized phased-array antenna and full-polarization beam forming method

A phased-array antenna and dual-polarization technology, which is applied to the combination of antenna elements with different polarization directions, the connection of antenna grounding switch structure, the structural form of radiation elements, etc., can solve the problem of single polarization mode and narrow signal of phased array radar Bandwidth and other issues, to achieve the effect of simple and reliable structure, lower voltage standing wave ratio, and good isolation characteristics

Active Publication Date: 2016-01-06
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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  • Broadband dual-polarized phased-array antenna and full-polarization beam forming method
  • Broadband dual-polarized phased-array antenna and full-polarization beam forming method
  • Broadband dual-polarized phased-array antenna and full-polarization beam forming method

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Embodiment 1

[0178] 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 uses full-wave electromagnetic simulation software to perform performance analysis on the broadband dual-polarization phased array antenna For 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, and 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 el...

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Abstract

The invention relates to the technical field of microwaves and antennas, in particular to a broadband dual-polarized phased-array antenna and a full-polarization beam forming method. The broadband dual-polarized phased-array antenna is characterized by comprising more than two antenna units, wherein the antenna units are made of pure metal; each antenna unit is comprises a metal cavity and an antenna; each metal cavity is enclosed by a bottom plate and four metal walls; the metal walls are fixed on the periphery of each bottom plate; a gradient broadband gap structure is adopted by each antenna; each antenna is located in each metal cavity; two polarization ports of each antenna are orthogonally arranged; waveguide cavities for achieving an impedance matching function are formed in the bottom of each antenna; the antenna comprises four metal ridges which are crossly arranged; each metal ridge is made of a metal plate; the length of the side, toward the outer side, of each metal ridge is greater than that of the side toward each cross center; the edge, close to the cross center, of each metal ridge is in an protruding arc form; four metal ridges form a radiation gap which is gradually increased from bottom to top at each cross center; each antenna is used for carrying out bottom feeding by coaxial lines; and the coaxial lines of the polarization port I and the polarization port II are respectively led out of the bottom plate of each 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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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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