6~20GHz同轴-矩形波导转换器的设计

宽带同轴-矩形波导转换器是高性能天馈系统的重要组件之一。针对现代电子系统对高频宽带特性的迫切需求,采用矩形波导宽壁平行加载金属双脊、同轴探针与脊波导非接触式转接、脊波导-矩形波导渐变转换的结构,设计了一种多过渡段、宽频带的同轴-矩形波导转换器,获得了6～20GHz工作带宽内插入损耗小于1dB、回波损耗小于-18dB的实测结果,可满足一般宽带天馈系统的馈电及测试要求。

Design of a Coaxial to Rect-Waveguide Transition with Enhanced Bandwidth of 6~20GHz

Broadband coaxial to rect-waveguide transitions are key components in modern high-quality antenna-feed systems.To meet the high-frequency and wideband requirement of modern electronic systems,a novel configuration of broadband coax to waveguide transition is described with double ridged wavewguide,untouched transition from the coaxial probe to ridged waveguide and tapered transition from the ridged waveguide to rect waveguide.Ridges are loaded in parallel on the same broad wall of waveguide.Different influences about the structural parameters of waveguide,ridges and SMA connector are discussed via contrast curves.In the measured bandwidth 6~20GHz,less than 1dB of the insertion loss and lower than-18dB of the return loss can be obtained.This transition can be empolyed in the feed and measurement applications of broadband antenna-feed system.