Title :
Active varactor tunable bandpass filter
Author :
Chandler, S.R ; Hunter, I.C. ; Gardiner, J.G.
Author_Institution :
Dept. of Electron. & Electr. Eng., Bradford Univ., UK
fDate :
3/1/1993 12:00:00 AM
Abstract :
A microstrip active varactor tunable bandpass filter is presented. The filter is based upon the negative resistance method using a microstrip combline network. A 1.8-GHz, two-pole device with a bandwidth of 2% was constructed. 0.6 octave tuning with significant improvement in passband performance was achieved compared with its passive counterpart.<>
Keywords :
active filters; band-pass filters; microstrip components; microwave filters; negative resistance; solid-state microwave circuits; tuning; varactors; 1.4 to 2.2 GHz; 1.8 GHz; UHF; combline network; microstrip; negative resistance; tunable bandpass filter; two-pole device; varactor; Active filters; Band pass filters; Frequency; Microstrip filters; Microwave filters; Passband; Resonator filters; Tunable circuits and devices; Tuning; Varactors;
Journal_Title :
Microwave and Guided Wave Letters, IEEE
