A miniaturized band rejection filter with new compact PBG (photonic band gap) cell employing T-type microstrip line
نویسندگان
چکیده
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 Ttype 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.
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