宽调谐电调双工器小型化设计  

Miniaturization Design of Wide Electronically Tunable Duplexer

作　　者：李春红[1] 魏隽 LI Chunhong;WEI Jun(The 54th Research Institute of CETC,Shijiazhuang 050081,China)

机构地区：[1]中国电子科技集团公司第五十四研究所,河北石家庄050081

出　　处：《无线电工程》2021年第3期217-221,共5页Radio Engineering

基　　金：国家重点研发计划项目(254)。

摘　　要：针对腔体电调双工器频率调谐范围窄、体积大的问题,研究了可调滤波器的外部Q值、腔间耦合系数对通带带宽的影响,以及谐振腔频率失谐导致滤波器调谐范围变窄的原因,提出了一种多孔耦合的级间耦合结构和解决谐振频率失谐的处理方法,设计出一收两发的体积紧凑的UHF频段电调双工器。试验结果表明,双工器可达到小型化、高选择性和绝对带宽基本恒定的效果,其中2套滤波器同步调谐,全频段内可保持同频率同幅频的特性。Aiming at the problem of narrow frequency tuning range and large volume of cavity electrically tunable duplexer,the influence of external Q value and the coupling coefficient on passband bandwidth is studied,as well as the reason of narrow tuning range caused by frequency detuning of resonant cavity.A porous coupling structure and the treatment method to solve the resonance frequency detuning are put forward,and a compact UHF band electrically tunable duplexer is designed.The experimental results show that the duplexer can achieve the effect of miniaturization,high selectivity and constant absolute bandwidth,in which two sets of filters can be tuned synchronously to maintain the characteristics of the same frequency.

关 键 词：腔体滤波器 电调滤波器 超高频 耦合结构 频率补偿 耦合系数 

分 类 号：TN454[电子电信—微电子学与固体电子学]