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http://dx.doi.org/10.6109/jkiice.2013.17.10.2233

Ultra Wideband Bandpsss Filter Design using the CRLH Transmission Line  

Kim, Gi-Rae (Department of Electronic Engineering, Silla University)
Publication Information
Journal of the Korea Institute of Information and Communication Engineering / v.17, no.10, 2013 , pp. 2233-2238 More about this Journal
Abstract
A novel design method of ultra wideband based on the composite right-/left handed (CRLH) transmission line is presented in this paper. Defected ground structure and microstrip interdigital coupler are used to implement the CRLH transmission line. The proposed CRLH transmission line in this paper have composite characteristics of low pass filter and high pass filter, also it has good advantages of low insertion loss and ultra wide passband characteristics. The structure with different cell number are studied, and the UWB filter using 3-cell CRLH transmission line is fabricated and measured, which shows a good agreement between simulated and measured results. It has center frequency of 5 GHz, fractional bandwidth of 105 %, and insertion loss of 0.7 dB at center frequency.
Keywords
DGS(Defect Ground Structure); Ultra Wideband Filter(UWB); Metamaterial; CRLH-TL;
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