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New Compact 1-D PBG Microstrip Structure with Steeper Stop-Band Characteristics
Wenmei ZHANG Xiaowei SUN Junfa MAO Rong QIAN Dan ZHANG
IEICE TRANSACTIONS on Electronics
Publication Date: 2003/09/01
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Microwaves, Millimeter-Waves
microstrip, photonic bandgap (PBG), bandstop filter, slow wave,
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A new type of compact one dimension (1-D) microstrip photonic bandgap (PBG) structure for filter is presented. A miniature semiconductor-based structure band-stop filter with four cells is simulated, fabricated, and measured. Agreement between the experimental and simulation results has been achieved. The filter with four proposed PBG structure exhibits deep (about -60 dB) and steep (about 40 dB/GHz) stop-band characteristics. It also has less loss and ripples in the pass-band. The period of the PBG lattice is about 0.2 λe (λe, guiding wavelength at the center frequency of stop-band), or 0.068 λ0 (λ0 wavelength in air), and the filter is very compact and much easier for fabrication and realization in MIC and MMIC.