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Study and analysis of contiguous channel triplexer based on combining method of two filtering circuits using CRLH and RH isolation circuits

Published online by Cambridge University Press:  04 March 2014

Hanseung Lee ,
Chung-Tse Michael Wu  and
Tatsuo Itoh
Hanseung Lee*
Affiliation:
University of California at Los Angeles, 420 Westwood Plaza, Los Angeles, California, USA. Phone: +1 310 733 6495
Chung-Tse Michael Wu
Affiliation:
University of California at Los Angeles, 420 Westwood Plaza, Los Angeles, California, USA. Phone: +1 310 733 6495
Tatsuo Itoh
Affiliation:
University of California at Los Angeles, 420 Westwood Plaza, Los Angeles, California, USA. Phone: +1 310 733 6495
*
Corresponding author: H. Lee Email: hlee0411@ucla.edu
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Abstract

Several types of multiplexers based on isolation circuits have been introduced and investigated. Combining method of two filtering circuits (CMTC) is one way to make multiplexers based on isolation circuits. This method fits well for designing contiguous channel triplexers. A triplexer based on CMTC consists of a conventional transmission line (TL) connected to a diplexer and a composite right/left-handed (CRLH) TL connected to a filter. The triplexer based on CMTC has two significant advantages. One is that it is not necessary to modify the design of a stand-alone filter and diplexer and there is freedom in the choice of filtering circuits. In addition, a designer does not need to perform three-dimensional full-wave optimization, because of a simple and straightforward design concept. In this paper, a triplexer prototype having 1, 1.125, and 1.25 GHz center frequencies, is designed and fabricated. The measured results show good agreement with the simulation results.

Keywords

Passive Components and CircuitsMeta-materials and Photonic Bandgap Structures
Type
Research Paper
Information
International Journal of Microwave and Wireless Technologies , Volume 6 , Issue 3-4: European Microwave Week 2013 , June 2014 , pp. 287 - 295
Copyright
Copyright © Cambridge University Press and the European Microwave Association 2014 

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