Title :
Varactor-tuned active miniature notch filter
Author :
Lababidi, R. ; Bourdel, S. ; Gaubert, J. ; Louzir, A. ; Robert, J.-L. ; Le Naour, J.-Y. ; Tong, D. Lo Hine ; Lintignat, J. ; Jarry, B. ; Barelaud, B.
Author_Institution :
IM2NP, Univ. of Aix-Marseille, Marseille, France
Abstract :
In this paper a novel tunable miniature active notch filter based on short circuited quarter-wavelength resonator is presented. This simple filter topology uses tunable Active Capacitance (AC) circuit and serves for trial purposes which are described below. Thanks to the use of a varactor diode in parallel within the AC circuit which allows a simultaneous tuning of the notch central frequency and depth whilst maintaining an electrically stable filter. Experimental prototypes based on conventional discrete surface mount components and assembled on a low-cost FR4 substrate have been built up in order to prove this new concept.
Keywords :
active filters; network topology; notch filters; resonator filters; varactors; AC circuit; discrete surface mount component; electrically stable filter; filter topology; low-cost FR4 substrate; notch central frequency; short circuited quarter-wavelength resonator; tunable active capacitance circuit; tunable miniature active notch filter; varactor diode; varactor-tuned active miniature notch filter; Capacitance; Filter banks; Microwave filters; RLC circuits; Resonant frequency; Resonator filters; Varactors;
Conference_Titel :
New Circuits and Systems Conference (NEWCAS), 2012 IEEE 10th International
Conference_Location :
Montreal, QC
Print_ISBN :
978-1-4673-0857-1
Electronic_ISBN :
978-1-4673-0858-8
DOI :
10.1109/NEWCAS.2012.6328958
