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The paper presents a compact planar Ultra Wide Band fllter employing folded stepped impedance resonators with series capacitors and dumb bell shaped defected ground structures. An interdigital quarter wavelength coupled line is used for achieving the band pass characteristics. The transmission zeros are produced by stepped impedance resonators. The fllter has steep roll ofi rate and good attenuation in its lower and upper stop bands, contributed by the series capacitor and defected ground structures respectively.

HIGH SELECTIVITY FILTER EMPLOYING STEPPED IMPEDANCE RESONATORS,SERIES CAPACITORS AND DEFECTED GROUND STRUCTURES FOR ULTRA WIDE BAND APPLICATIONS