Title :
Theory on a circular dual-mode resonator and filter with internal coupling scheme
Author :
Awai, Ikuo ; Yamashita, Takeharu
Author_Institution :
Sch. of Eng., Yamaguchi Univ., Ube, Japan
Abstract :
The coupling coefficient and resonant frequency shift of dual modes induced by the internal perturbation are obtained theoretically for a general circular resonator. They are used for the design of a two-stage BPF together with the external Q also theoretically derived. The frequency and the appearance condition of the intrinsic attenuation poles at both sides of the passband are analyzed in a simple form
Keywords :
Q-factor; UHF filters; band-pass filters; linear network analysis; linear network synthesis; passive filters; poles and zeros; resonator filters; resonators; 1.8 GHz; circular dual-mode resonator; coupling coefficient; external Q-factor; internal coupling scheme; internal perturbation; intrinsic attenuation poles; resonant frequency shift; resonator and filter; two-stage BPF; Attenuation; Band pass filters; Couplings; Filtering theory; Inductance; Passband; Resonance; Resonant frequency; Resonator filters; Shunt (electrical);
Conference_Titel :
Microwave Conference Proceedings, 1997. APMC '97, 1997 Asia-Pacific
Print_ISBN :
962-442-117-X
DOI :
10.1109/APMC.1997.654667
