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   Vol.E86-C   No.9   pp.1894-1897
Publication Date: 2003/09/01
Online ISSN: 
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 λ00 wavelength in air), and the filter is very compact and much easier for fabrication and realization in MIC and MMIC.