紧凑型波导滤波器及测试.pdfVIP

第四部分 微波毫米波无源器件及电路 紧凑型波导滤波器及其测试 王清源 李洪 刘荣军 廖翱 电子科技大学物理电子学院 摘要：本文介绍了一种电容加载的紧凑型波导滤波器。论文首先根据传输线理论说明采用电容加载的方式可以使传输线的长 度缩短，然后根据波导滤波器设计理论和CAD模拟设计了一只普通的波导滤波器和两只电容加载的紧凑型波导滤波器。为 了测试该滤波器，我们还设计加工了两只同轴－波导转接器。采用该转接器对一只紧凑型滤波器样品进行了测试。测试结果 证明了该滤波器具有体积小，阻带选择性好，寄生通带远等优点。 关键字：紧凑型 波导 滤波器 转接头 Compact waveguide filter and its measurement Qingyuan Wang, Hong Li, Rongjun Liu and Ao Liao School of Physical Electronics, University of Electronic Science and Technology of China , Chengdu 610054, P. R. China. Abstract: This paper will present a capacity -loaded compact waveguide filter. Transmission line theory will be used to show that length of a transmission line can be shortened by capacity-loading. A conventional waveguide filter and two capacity-loaded compact filters will then be designed based on waveguide filter theory and CAD simulations. In addition, two coaxial-waveguide transitions which have been designed to test the sample filter, will also be introduced. Tested results show that the compact waveguide filter has many advantages such as small size, better skirt selectivity, and further spurious passbands. Key Words : Compact, waveguide, filter, transition ZZZZ0000 ,l,l,l,l ZZZZ0000 ,l,l,l,l Z , LZ , LZ , LZ , L 1 引言 jBjBjBjB 波导滤波器具有高功率容量，低插损和良好的频