Single pole compact narrow band pass filter using periodic ground defects
DOI:
https://doi.org/10.3103/S0735272713090057Keywords:
microstrip band pass filter, defective ground structure, parallel coupling structure, end coupling structureAbstract
In this paper a compact narrow band pass filter has been designed. An H-shape section of microstrip is used to get the smaller band width. The parallel lines are connected to the H section. The periodic slots are made on the ground plane of the microstrip. These defects cause the circuit more compact. The filter has been designed for center frequency 4 GHz and fractional band width 3%. The design methodology has been clearly explained. To verify the proposed technique, a filter has been fabricated and tested. A moderate matching of the results between the measured and simulated results has been observed due to some imperfection in fabrication.
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