Title :
Novel electronically tunable DR band-stop filter
Author_Institution :
Sch. of Electron. & commun. Eng. & Appl. Phys., North London Univ., UK
Abstract :
This paper describes the fundamental characteristics and experimental results of a newly developed electronically tunable dielectric resonator (DR) band-stop filter. The tuning configuration employed consists of a microstrip line ring loaded with GaAs varactor diodes. The tuning circuit has been developed to produce large variation in the dielectric resonator´s fundamental TE01δ mode resonant frequency without affecting its quality factor significantly. The 4-pole filter fabricated is compact and light weight, exhibiting a tuning bandwidth of 58 MHz with steep attenuation slope
Keywords :
III-V semiconductors; Q-factor; band-stop filters; circuit tuning; dielectric resonators; gallium arsenide; microstrip filters; microwave filters; resonator filters; varactors; 3.29 GHz; 4-pole filter; 58 MHz; GaAs; GaAs varactor diodes; attenuation slope; dielectric resonator band-stop filter; electronically tunable DR band-stop filter; fundamental characteristics; fundamental mode resonant frequency; microstrip line ring; quality factor; tuning bandwidth; tuning circuit; tuning configuration; Circuit optimization; Dielectrics; Diodes; Gallium arsenide; Microstrip; RLC circuits; Resonator filters; Tunable circuits and devices; Tuning; Varactors;
Conference_Titel :
Microwave and Optoelectronics Conference, 1995. Proceedings., 1995 SBMO/IEEE MTT-S International
Conference_Location :
Rio de Janeiro
Print_ISBN :
0-7803-2674-1
DOI :
10.1109/SBMOMO.1995.509681
