Design of dual-mode band-pass filter employing dumbbell-shape resonator

A novel band-pass filter using a dual-mode resonator is presented with a excellent performance. The effect of out/input coupling structures arranged at 1800 geometrically is discussed for the dual-mode filter. The coupling coefficient between degenerate modes of dual-mode resonator is investigated b...

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Bibliographic Details
Published in2014 XXXIth URSI General Assembly and Scientific Symposium (URSI GASS) pp. 1 - 4
Main Authors Naibo Zhang, Lirong Mei
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.08.2014
Subjects
Band-pass filters
Couplings
Filtering theory
Microstrip filters
Microwave filters
Resonant frequency
Resonator filters
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Summary:A novel band-pass filter using a dual-mode resonator is presented with a excellent performance. The effect of out/input coupling structures arranged at 1800 geometrically is discussed for the dual-mode filter. The coupling coefficient between degenerate modes of dual-mode resonator is investigated by the perturbation size. The dual-mode band-pass filter is designed, fabricated and measured. The filter is designed and implemented at 2.8 GHz with 10.5% bandwidth, and the performances show a low passband insertion loss of 0.7 dB with good harmonics inhibited and the rejection better than 25 dB from about 3 GHz.
DOI:10.1109/URSIGASS.2014.6929001