Tunable lumped-distributed capacitively-coupled transmission-line filter
ELECTRONICS LETTERS, vol.40, no.7, pp.434-436, 2004 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: 40 Issue: 7
- Publication Date: 2004
- Doi Number: 10.1049/el:20040291
- Journal Name: ELECTRONICS LETTERS
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Page Numbers: pp.434-436
- Middle East Technical University Northern Cyprus Campus Affiliated: No
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.