International Symposium on Electromagnetic Compatibility


Session Number:23P4



A Miniaturized Band Rejection Filter with New Compact PBG (Photonic Band Gap) Cell Employing T-type Microstrip Line

M. H. Kim,  N. S. Kim,  Y. B. Park,  S. H. Kim,  J. W. Jung,  S. Y. Kang,  Y. Yun,  K. H. Park,  


Publication Date:2009/7/20

Online ISSN:2188-5079


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A new type of compact microstrip line photonic band gap(PBG) structure employing T-type microstrip line for filter is presented. A miniature band rejection filter with four cells is simulated, fabricated, and measured. The filter with four proposed PBG structure exhibits band rejection characteristics (lower than -10dB from 23GHz~32GHz). The center frequency of stop-band is at 28GHz. The period of the PBG lattice is about 0.15e. The line length of the filter with PBG cell employing T-type micorstrip line was reduced to about 10.4mm, and its size was 14% of the conventional band rejection filter. The filter is very compact and much easier for fabrication and realization in MIC and MMIC.