Title :
Two-stage bandpass filters based on rotated excitation of circular dual-mode resonators
Author :
Awai, Ikuo ; Yamashita, Takeharu
Author_Institution :
Dept. of Electr. & Electron. Eng., Yamaguchi Univ., Ube, Japan
fDate :
8/1/1997 12:00:00 AM
Abstract :
A new excitation method for dual-mode circular resonators is studied. The bandwidth and the frequency of attenuation poles of the resulting two stage bandpass filter (BPF) are determined by the angle between I/O ports. Addition of a shunt susceptance at the I/O ports gives an independent control of the bandwidth
Keywords :
UHF filters; band-pass filters; coplanar waveguides; microstrip filters; poles and zeros; resonator filters; I/O port angle; attenuation poles; bandwidth control; circular dual-mode resonators; coplanar ring resonators; microstrip ring resonators; rotated excitation; shunt susceptance; two-stage bandpass filters; Attenuation; Band pass filters; Bandwidth; Coplanar waveguides; Coupling circuits; Frequency; Microstrip filters; Optical ring resonators; Resonator filters; Shunt (electrical);
Journal_Title :
Microwave and Guided Wave Letters, IEEE
