超短波宽带阻抗变换器的设计与实现  

Design and Realization of the UHF Broad-Band Impedance Transformer

作　　者：官伯然[1] 余波[1] 

机构地区：[1]杭州电子科技大学天线与微波技术研究所,杭州310018

出　　处：《微波学报》2016年第2期1-5,共5页Journal of Microwaves

基　　金：公安部重点研究计划项目;车载短波盲区通信天馈关键技术(201201ZDYJ014)

摘　　要：基于传输线变压器原理的超短波超宽带阻抗变换器,在短波和超短波电路中具有十分重要的地位。这类器件具有相对带宽宽、尺寸小、传输效率高的优异性能。本文采用铁氧体磁环设计了一款基于传输线变压器原理的宽带Ruthroff型1:4阻抗变换器和一款宽带四路功率分配器。从测量结果可以看出,两款器件在2 MHz到500 MHz的大部分频带范围内,回波损耗均小于-14 dB,传输损耗均小于1 dB。研究成果对于正确理解传输线变压器器件工作原理、合理确定参数诸元、实现预期频带特性等方面具有一定参考价值。Broad-band impedance transformers based on transmission line transformer theory play important role in VHF and UHF circuits. These components have the advantages in wide frequency band,compact structure,and high efficiency. In this paper,a1：4 Ruthroff-Type impedance transformer and a 4-way power splitter are designed and realized using transmission line transformer and ferrite toroid. For these two components insertion loss both less than 1 dB and return loss both less than-14 dB in most band of 2 MHz to 500 MHz are measured. Some results of this paper are meaningful for understanding how transmission line transformer working,selecting materials and realizing anticipated frequency band characteristics.

关 键 词：传输线变压器 阻抗变换 宽带 功率分配器 

分 类 号：TN624[电子电信—电路与系统]