Title :
Design of dual-mode band-pass filter employing dumbbell-shape resonator
Author :
Naibo Zhang ; Lirong Mei
Author_Institution :
Fifty-Fourth Res. Inst., Beijing R&D Center, China Electron. Technol. Group Corp. (CETC-54), Beijing, China
Abstract :
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.
Keywords :
band-pass filters; microstrip filters; resonator filters; bandwidth 2.8 GHz; coupling coefficient; dual-mode band-pass filter; dual-mode resonator; dumbbell-shape resonator; gain 0.7 dB; input coupling structures; low passband insertion loss; output coupling structures; perturbation size; Band-pass filters; Couplings; Filtering theory; Microstrip filters; Microwave filters; Resonant frequency; Resonator filters;
Conference_Titel :
General Assembly and Scientific Symposium (URSI GASS), 2014 XXXIth URSI
Conference_Location :
Beijing
DOI :
10.1109/URSIGASS.2014.6929001
