Vol. 59

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2015-09-24

Bandpass Filters with Mixed Hairpin and Patch Resonators

By Eugene Amobichukwu Ogbodo, Yi Wang, and Predrag B. Rapajic
Progress In Electromagnetics Research C, Vol. 59, 101-106, 2015
doi:10.2528/PIERC15072905

Abstract

This paper presents a new implementation technique of transmission zeros in an in-line coupled filter. Neither cross couplings between non-adjacent resonators nor separate side-line resonators have been used. Instead a mixture of single-mode hairpin resonators and dual-mode patch resonators have been adopted in a bandpass filter with one asymmetric transmission zero. The introduction of the patch led to an improved frequency selectivity through an independently controllable transmission zero. This approach has been verified by a three-pole filter at 2.6 GHz with 8% bandwidth and a transmission zero at 2.4 GHz. Good agreement has been shown between the measurements and the simulation.

Citation


Eugene Amobichukwu Ogbodo, Yi Wang, and Predrag B. Rapajic, "Bandpass Filters with Mixed Hairpin and Patch Resonators," Progress In Electromagnetics Research C, Vol. 59, 101-106, 2015.
doi:10.2528/PIERC15072905
http://jpier.org/PIERC/pier.php?paper=15072905

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