Design of a Dual-Feed Orthogonal Polarized Patch Antenna Array

摘要

A dual-feed orthogonal polarized patch array with high polarized isolation has been designed in this paper. A very foundational rectangular patch is adopted to be array elements which provide desirable isolation between two feeding ports for orthogonal polarizations, and desirable axis ratio for circularpolarized array. The feed network is designed as a planar structure which can be extended to construct the larger array conveniently. Two 4x4 arrays are designed and fabricated to investigate the isolation performance between two feeding ports for orthogonal polarizations and the axis ratio performance for circular-polarized arrays. Simulated and measured results show that desirable performance of isolation below -40dB and bandwidth of axis ratio less than 3dB of 6% can be achieved.