Title :
Microwave dielectric resonator tuning with balanced loop-varactor circuit
Author :
El-Moussaoui, A. ; Kazeminejad, S. ; Howson, D.P.
Author_Institution :
Dept. of Electr. Eng., Bradford Univ., UK
Abstract :
The authors report a novel electronic tuning method for a shielded dielectric resonator (DR) operating in its dominant mode. The use of a balanced loop structure permits a wider tuning range while maintaining high unloaded Q0. A tuning range of 3 MHz at the centre frequency of 950 MHz with unloaded Q in excess of 9000 have been obtained. A simple analytical expression is also derived for determining the tuning range of such a structure.
Keywords :
dielectric resonators; equivalent circuits; solid-state microwave circuits; tuning; varactors; 950 MHz; UHF; balanced loop-varactor circuit; dielectric resonator tuning; dominant mode; electronic tuning method; microwave circuits; shielded dielectric resonator;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19890879
