基于平衡馈电技术双极化天线馈电结构的设计

Feed Part Design Based on the Balanced Feed Technique for Dual-polarized Antennas

设计了一种基于2.6～4GHz双槽波纹喇叭天线的双极化馈电结构,用对称的平衡馈电结构作为馈源的馈电部分,并对平衡馈电结构从场的角度进行定性分析,同时还采用新的馈电探针结构来改善天线的匹配特性。结合180°电桥的测试结果表明,与传统四脊双极化喇叭相比,采用该馈电结构的天线方向图具有轴对称性好、交叉极化低等特点,在测试环境要求较高的情况下,可以作为高性能紧缩场馈源的馈电部分。

A novel symmetric structure is designed as the feed part of the antenna,which is based on the balanced feed technique.In this paper,the propagating modes of the balanced feed structure are analyzed,and a new waveguide feed probe is designed to depress VSWR.Test results show that,compared with the traditional double-polarized quadruple-ridge horn antenna,the performances of VSWR and cross-polarization of the antenna with the balanced feed structure proposed in this paper are improved,and this balanced feed structure can be used as the feed part of the antenna with high performance.