Compact UWB Bandpass Filter with Narrow Notch-Band and Wide Stop-Band

This paper presents a compact ultra-wideband (UWB) band-pass filter (BPF) with a sharply rejected notch-band and wide stop-band. The proposed UWB BPF is realized by cascading two interdigital hairpin resonator units, a spiral slot, a semicircle defected ground structure (S-DGS) and a semicircle step...

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Bibliographic Details
Published in:Journal of electromagnetic waves and applications 2010-01, Vol.24 (7), p.911-920
Main Authors: Wei, F., Chen, L., Wu, Q.-Y., Shi, X.-W., Gao, C.-J.
Format: Article
Language:English
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Summary:This paper presents a compact ultra-wideband (UWB) band-pass filter (BPF) with a sharply rejected notch-band and wide stop-band. The proposed UWB BPF is realized by cascading two interdigital hairpin resonator units, a spiral slot, a semicircle defected ground structure (S-DGS) and a semicircle stepped-impedance shunt stub (S-SISS). The spiral slot is studied and adopted to introduce a notched band. An S-DGS and an S-SISS are cascaded in order to suppress the spurious in stopband. Good insertion/return losses and high out-of-band rejections are achieved as demonstrated in both simulation and experiment.
ISSN:0920-5071
1569-3937
DOI:10.1163/156939310791285155