Title :
Tunable lumped-distributed capacitively-coupled transmission-line filter
Author :
Carey-Smith, B. ; Warr, P.A. ; Beach, M.A. ; Nesimoglu, T.
Author_Institution :
Dept. of Electr. & Electron. Eng., Univ. of Bristol, UK
fDate :
4/1/2004 12:00:00 AM
Abstract :
A wide tuning range filter is proposed based on lumped-distributed capacitively-coupled transmission lines. The proposed structure maintains a constant inter-resonator coupling factor over a wide centre-frequency tuning range leading to a constant fractional bandwidth design. A bandpass filter with a two-octave tuning range has been designed, fabricated and measured.
Keywords :
band-pass filters; coupled circuits; coupled transmission lines; resonator filters; tuning; bandpass filter; fractional bandwidth design; frequency tuning; interresonator coupling factor; lumped-distributed capacitively coupled transmission line filter; two-octave tuning;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20040291
