Title :
Bandpass varactor tunable filters using step impedance resonators
Author :
Kapilevich, B. ; Shulzinger, A. ; Lukjanets, R.
Author_Institution :
Dept. of Electr. & Electron. Eng, Coll. of Judea & Samaria, Ariel, Israel
Abstract :
A bandpass varactor tunable filter has been designed to operate from 1 to 2 GHz. In order to expand the tuning range and stabilize bandwidth, step impedance resonators with L and T coupling sections are suggested. As an illustrative example, a 2×AMP×2 order filter, tuned within 50% and having almost constant bandwidth, is reported. Integrating such a filter with a low-noise MMIC amplifier has allowed zero insertion loss to be realized.
Keywords :
UHF filters; band-pass filters; circuit tuning; coupled circuits; resonators; strip line filters; strip line resonators; varactors; 1 to 2 GHz; L coupling sections; T coupling sections; bandpass filter; bandpass varactor tunable filter; low-noise MMIC amplifier; microwave filters; narrowband filters; step impedance resonators; Band pass filters; Bandwidth; Communication switching; Impedance; Microwave communication; Microwave filters; Resonator filters; Switching circuits; Tunable circuits and devices; Varactors;
Conference_Titel :
Electrical and Electronics Engineers in Israel, 2004. Proceedings. 2004 23rd IEEE Convention of
Print_ISBN :
0-7803-8427-X
DOI :
10.1109/EEEI.2004.1361147
