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http://dx.doi.org/10.5515/KJKIEES.2008.19.10.1122

Tunable Bandstop Filter with Combined Right/Left-Handed Transmission Lines  

Sung, Gyu-Je (Dept. of EE, Hankyong National University)
Kim, Ell-Kou (School of Electronics Engineering, Kumoh National Institute of Technology)
Kim, Young (School of Electronics Engineering, Kumoh National Institute of Technology)
Yoon, Young-Chul (Electronics and Information Communication Engineering, Kwandong University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.19, no.10, 2008 , pp. 1122-1128 More about this Journal
Abstract
A novel tunable bandstop filter was proposed. It is composed of a right-handed transmission line, which has lowpass characteristics, and a left-handed transmission line which has highpass characteristics. Dispersion relations for the unit cells of RHTL and LHTL were derived by the method of ABCD parameter analysis. Varactor diodes and chip inductors were used to make the unit cells of RHTL and LHTL. A tunable bandstop filter was designed and fabricated by the parallel connection of RHTL and LHTL. The measured results of the proposed tunable bandstop filter are agreed well with the simulated results.
Keywords
Bandstop Filters; Left-Handed Transmission Lines; Right-Handed Transmission Lines; Tunable Filters; Varactors;
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