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Triple-Mode Substrate Integrated Coaxial Resonator Based Bandpass Filter Featuring Flexible Transmission Zeros and Adjustable Bandwidth
I.S. Krishna,
Published in Institute of Electrical and Electronics Engineers Inc.
Volume: 68
Issue: 4
Pages: 1223 - 1227
This communication presents substrate integrated coaxial resonator (SICR) based triple-mode bandpass filters designed for K{u} -band. A self-shielded SICR based third-order filter is realized using two planar coaxial resonators (SICR) embedded in a substrate integrated waveguide cavity (SIW). Merging the TEM based mode of two SICR's with TE101 mode of SIW significantly enhances the bandwidth in a compact size. A novel topology realized using short circuited metallic via connecting to the top conducting plane through a metal strip demonstrates high degree of flexibility in positioning the transmission zeros to improve the selectivity as well as extend the out-of-band rejection of proposed filter. The three experimental prototypes devised for K{u} -band with fractional bandwidth more than 23% demonstrate multiple transmission zeros for good selectivity and out-of-band rejection with low insertion loss in a compact form factor. © 2004-2012 IEEE.
About the journal
JournalData powered by TypesetIEEE Transactions on Circuits and Systems II: Express Briefs
PublisherData powered by TypesetInstitute of Electrical and Electronics Engineers Inc.
Open AccessNo