Design method for bandpass filter with enhanced stopband rejection using spiral SIRs

A new design method for a compact narrowband bandpass filter with high out-of-band rejection level is presented. A cross-coupled spiral stepped-impedance resonator (SIR) filter is proposed, which consists of four spiral SIRs to realise the sharpest skirt characteristic. The fundamental mode is stren...

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Bibliographic Details
Published inElectronics letters Vol. 48; no. 17; p. 1
Main Authors Won, Y S, Bae, K U, Myung, N H
Format Journal Article
LanguageEnglish
Published Stevenage John Wiley & Sons, Inc 16.08.2012
Subjects
Bandpass filters
Narrowband
Noise levels
Rejection
Resonators
Skirts
Spirals
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Summary:A new design method for a compact narrowband bandpass filter with high out-of-band rejection level is presented. A cross-coupled spiral stepped-impedance resonator (SIR) filter is proposed, which consists of four spiral SIRs to realise the sharpest skirt characteristic. The fundamental mode is strengthened while spurious modes are suppressed, so the proposed filter rejects 4.79 dB more on average than the conventional filter. The loaded Q is 59.36.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
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content type line 23
ISSN:0013-5194
1350-911X