An angle-fed broadband high-isolation dual-polarized antenna

Abstract

The invention relates to the technical field of microwave antennas, in particular to a corner-fed type broadband high-isolation dual-polarized antenna. The antenna comprises a first dielectric substrate, a second dielectric substrate, a third dielectric substrate, a fourth dielectric substrate and a fifth dielectric substrate, a parasitic patch, a radiation patch, a gap metal plate, two micro-strip feeder lines, a metal reflector plate, two coaxial lines, a first metal isolated via hole and a second metal isolated via hole, wherein the first dielectric substrate, the second dielectric substrate, the third dielectric substrate, the fourth dielectric substrate and the fifth dielectric substrate are laminated from top to bottom in sequence; the parasitic patch is arranged on the lower surface of the first dielectric substrate; the radiation patch is arranged on the upper surface of the third dielectric substrate; the gap metal plate is arranged on the upper surface of the fourth dielectric substrate, and two orthogonal H-shaped gaps are formed in the gap metal plate; the two micro-strip feeder lines are arranged on the upper surface of the fifth dielectric substrate; the metal reflector plate is arranged on the lower surface of the fifth dielectric substrate; and the inner conductor of each coaxial line is connected with one micro-strip feeder line. The corner-fed type broadband high-isolation dual-polarized antenna disclosed by the invention has the advantages of wide working bandwidth, high port isolation, low cross polarization level, small standing wave, low profile and light weight.

Description

technical field [0001] The invention relates to the technical field of microwave antennas, in particular to an angle-fed broadband high-isolation dual-polarization antenna. Background technique [0002] The phased array antenna radiator is one of the most critical extension systems that determine the performance of the phased array radar. When designing the phased array antenna, the radiator units are arranged in a certain order to achieve performance requirements such as low sidelobes, and then Improve antenna performance. Generally, the port isolation and cross-polarization of the antenna directly affect the sensitivity and resolution of the system, and the port cross-polarization isolation in most antennas is relatively low, resulting in a low level of cross-polarization isolation. [0003] Existing radiator units mainly include Vivaldi antennas, probe-coupled microstrip antennas and slot-coupled antennas. The Vivaldi antenna unit can meet the basic performance of the r...

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Problems solved by technology

[0004] The purpose of the present invention is to provide an angle-fed broadband high-isolation dual-polarization antenna to solve at least one problem existing in the existing phased array antenna

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