Improvement of Stopband Performance OF Microstrip Reconfigurable Band Pass Filter By Defected Ground Structure
نویسندگان
چکیده
A scheme for designing reconfigurable parallel-coupled-line bandpass filters using a SPDT MEMS switch, capable of operating at two different passband is presented. The spurious resonance of the filter has been removed by using defected ground structures to obtain better stopband performance. A proto-type filter with passband center frequency around 3.5 GHz and 5.0 GHz has been designed. The simulation has been done by MOM based IE3D software. Applying defected ground structures under output feed lines, we have achieved stopband with minimum attenuation of -25 dB upto 12 GHz.
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