NOVEL ELECTRONIC TUNER USING VARACTORS FOR TUNABLE RF FRONT-ENDS

查看全文 作　　者：Li [1]Liang;Liu [1]Taijun;Ye [1]Yan;Zhang [2]Haili;Hui [1]Ming;Li [1]Jun;Wen [1]Huafeng 机构地区：[1]College of Information Science and Engineering, Ningbo University;[2]Mechanical and Electrical Engineering School, Zhejiang Textile & Fashion College 出　　处：《Journal of Electronics(China)》索引2013年第30卷第3期,共7页 基　　金：Supported by the National Science and Technology Major Project of China (No. 2010ZX03007-003-04);Ningbo University - Agilent Joint Laboratory, the National Natural Science Foundation of China (No. 61171040);the Key Project of International Cooperation of the Provincial Science Technology Major Projects of Zhejiang (No. 2010C14007);the Provincial Natural Science Foundation of Zhejiang (No. Y1101270);the Natural Science Foundation of Ningbo (No. 2011A610188);the Scientific Research Foundation of Graduate School of Ningbo University (No. G12JA019);Scientific Research Fund of Zhejiang Provincial Education Department (No. Y201224247);Research Foundation of Ningbo University (No. XKL11D2064) 摘　　要：This paper presents a novel electronic tuner with high power handling capability utilizing varactors based on the asymmetric bilateral coupled microstrip transmission line. Through varying the bias voltage of the varactor at the Ultra High Frequency (UHF) band, the performance of the tuner is demonstrated according to simulated and measured results from several cases with the return loss (S11 ) below -20 dB and the insertion loss (S21 ) within ±0.5 dB. Compared with tuners using p and t network, electronic tuner of this paper shows superior frequency agility as well as wide impendence coverage. Advanced biasing structure has been developed to improve power handling for high power level applications. It is expected that the novel tuner would be part of intelligent Radio Frequency (RF) front-ends system and cognitive wireless system in the future. 关 键 词：Electronic tuner Coupled microstrip Matching network MULTI-BAND VARACTORS