Title :
A bandpass filter using electrically coupled TM/sub 01 delta / dielectric rod resonators
Author :
Kobayashi, Y. ; Minegishi, M.
Author_Institution :
Dept. of Electr. Eng., Saitama Univ., Japan
Abstract :
A compact bandpass filter having Chebyshev, low-loss, and good spurious response has been constructed by placing high-Q TM/sub 01 delta / dielectric rod resonators coaxially in a TM/sub 01/ cutoff circular waveguide. Precise design of the high-Q resonators and interresonator coupling is performed by the mode-matching technique. The interresonant coupling is equivalently expressed by a capacitively coupled LC resonant circuit. A four-stage Chebyshev filter having ripple of 0.035 dB and equiripple bandwidth of 27 MHz at the center frequency of 11.958 GHz, fabricated using these resonators, is discussed.<>
Keywords :
Chebyshev approximation; band-pass filters; dielectric resonators; microwave filters; passive filters; waveguide components; 11.958 GHz; 27 MHz; SHF; TM/sub 01/ cutoff circular waveguide; bandpass filter; capacitively coupled LC resonant circuit; compact design; dielectric rod resonators; four-stage Chebyshev filter; high-Q resonators; interresonator coupling; low-loss response; microwave filters; mode-matching technique; Band pass filters; Chebyshev approximation; Coaxial components; Coupling circuits; Dielectrics; Permittivity; RLC circuits; Resonance; Resonant frequency; Resonator filters;
Conference_Titel :
Microwave Symposium Digest, 1988., IEEE MTT-S International
Conference_Location :
New York, NY, USA
DOI :
10.1109/MWSYM.1988.22085
