Low-cross-polarization ultra-wideband strong-coupling opposite-dipole phased array antenna

Abstract

The invention discloses a low-cross-polarization ultra-wideband strong-coupling opposite-dipole phased array antenna. The antenna comprises an opposite strong-coupling dipole unit, an impedance matching layer and a reflection ground plate; the bottom of the opposite strong-coupling dipole unit is vertically embedded in the reflection ground plate; and the impedance matching layer is arranged at the top of the opposite strong-coupling dipole unit and is parallel to the reflection ground plate. According to the low-cross-polarization ultra-wideband strong-coupling opposite-dipole phased array antenna of the invention, two dielectric substrates and the opposite-dipole structure are adopted, so that the intrinsic defect of low cross polarization of a traditional vertical strong coupling phasedarray antenna can be eliminated; unique metal vias are designed at feed Balun portions connected with two dipole patches so as to suppress the resonance of the array at high frequencies and improve the degree of isolation between array units to some extent; and the open-loop metamaterial wide-angle impedance matching layer at the upper part of the antenna is adopted to replace a traditional puredielectric wide-angle impedance matching layer, and therefore, the antenna of the invention has the advantages of light weight, easiness in realizing conformality, modularity and the like.

Description

technical field [0001] The invention belongs to the technical field of antenna engineering, and in particular relates to a low-cross polarization ultra-wideband strong-coupling antipodal dipole phased array antenna. Background technique [0002] The phased array antenna adds the ability to phase control the beam in the array antenna. Phased array antennas have nanosecond-level fast beam scanning capabilities, and have no shortcomings such as motion inertia, time delay, and mechanical vibration that mechanical beam scanning systems have, so they are widely used in target detection, tracking, imaging, and satellite communications. . The phased array antenna with wide-band and wide-angle scanning characteristics is a commonly used antenna form in modern radar systems. With the rapid development of modern military technology, various military electronic systems have put forward higher requirements for the wide-bandwidth and wide-angle scanning characteristics of phased arrays....

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Problems solved by technology

[0004] In view of the above-mentioned deficiencies in the prior art, the cross-polarized ultra-broadband strong-coupled antipodal dipole phased array antenna provided by the present invention solves the problems of poor cross-polarization, excessive weight and isolation in the existing phased array antennas. The problem of poor degree characteristics

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