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Design and Implementation of Miniaturized LTCC Balanced Filter

In this thesis, we propose a miniaturized LTCC balanced filter that integrates bandpass filter (BPF) and balun. In order to reject interferences, we have the transmission zero of out-band by extra capacities and inductances in the prototype of Second-Order BPF. On the other hand, we miniaturize the balun by revising the length of couple-line with four shunt capacities. The practice size of the miniaturized balanced filter is 2.0mm x 1.25mm x 0.95mm.The insertion and return losses are less than -2.5dB and -20dB over operating frequency band, respectively. The phase difference is less than 5 ¢X, and the amplitude difference is within -0.5dB in operating frequency band. The size is the smallest in the similar commercial product and relative journal.

Identiferoai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0122108-115729
Date22 January 2008
CreatorsLi, Jyun-lin
ContributorsWhei-Min Lin, Yu-Feng Huang, Herng-Yih Ueng
PublisherNSYSU
Source SetsNSYSU Electronic Thesis and Dissertation Archive
LanguageCholon
Detected LanguageEnglish
Typetext
Formatapplication/pdf
Sourcehttp://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0122108-115729
Rightsnot_available, Copyright information available at source archive

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