BANDPASS FILTERS WITH MIXED HAIRPIN AND PATCH RESONATORS | Zendy

Eugene A. Ogbodo | Zendy; Yi Wang | Zendy; Predrag Rapajic | Zendy

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BANDPASS FILTERS WITH MIXED HAIRPIN AND PATCH RESONATORS

Author(s) -

Eugene A. Ogbodo,

Yi Wang,

Predrag Rapajic

Publication year - 2015

Publication title -

progress in electromagnetics research c

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.341

H-Index - 34

ISSN - 1937-8718

DOI - 10.2528/pierc15072905

Subject(s) - band pass filter , resonator , materials science , electronic engineering , optoelectronics , engineering

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.

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