Dual-polarized antenna array and dual-polarized phased-array antenna

Abstract

The invention provides a dual-polarized antenna array and a dual-polarized phased-array antenna. The dual-polarized antenna array includes two antenna modules arranged in a 180-degree rotationally symmetric manner. Each antenna module includes a polarization feeder line component, a coupling slit component, and a plurality of a radiation patches. The polarization feeder line component includes a first polarization feed line and a second polarization feed line. The first polarization feed line and the second polarization feed line are both disposed on the same side of a rotation center in the arrangement direction. The coupling slit component includes a plurality of mutually perpendicular first coupling slits and a plurality of second coupling slits. Each radiation patch covers a first coupling slit and a second coupling slit. In the dual-polarized antenna array, the rotationally symmetric arrangement pattern make adjacent line arrays generate inverted influences, so that the cross-polarization components generated by nonideal factors cancel each other out, the mutual coupling effect between different polarization feed networks is reduced to some extent, and finally the polarizationisolation of the obtained array antenna may be as high as over 30dB.

Description

technical field [0001] The invention relates to the field of antennas, in particular to a dual-polarization antenna array and a dual-polarization phased array antenna. Background technique [0002] With the development of radar polarization theory and technology, polarization has become an indispensable technical means of modern fine, high-dimensional and intelligent radar. Dual-polarization phased array radar with accurate polarization measurement capability is an important development trend of multi-functional phased array radar in the future, and has broad application prospects in meteorological observation, air defense and anti-missile and other fields. The accuracy of target polarization information acquisition is one of the key factors affecting the performance of polarization application technology. Precision polarization measurement places very strict requirements on radar system design and signal processing technology. The polarization characteristics of the dual-p...

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Problems solved by technology

Using multi-layer structure and other complex structure designs can get higher polarization isolation, which can reach 20~30dB. The antenna design schemes usually use balanced feeding, multi-layer design and other methods to suppress cross-polarization. The cross-polarization obtained by these schemes Polarization isolation is limited, or the structure is relatively complex

[0005] For traditional dual-polarized arrays arranged in the same direction, the cross-polarized components generated by the non-ideal factors of the actual array antenna (such as impedance mismatch, processing error, etc.) are difficult to avoid, and the mutual coupling between different polarization feed networks Cross-polarization components are also produced, and when these factors are dominant, cross-polarization of the array can become very severe

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