Title :
A piezoelectric tuned combline filter
Author :
Al Ahmad, Mahmoud ; Maenner, Ruth ; Matz, Richard ; Russer, Peter
Author_Institution :
Lehrstuhl fur Hochfrequenztechnik, Technische Univ. Munchen, Munich, Germany
Abstract :
A piezoelectrically tunable combline bandpass filter with a measured tuning range of 135% is presented. The filter incorporates a novel parallel-plate capacitor that can be tuned by a piezoelectrically movable electrode. This paper discusses the effects of tuning mechanism on the overall quality factor, return loss, insertion loss, and the relative bandwidth at the mid of the band as a function of frequency across the entire tuning range.
Keywords :
Q-factor; band-pass filters; capacitors; comb filters; crystal filters; bandpass filter; combline filter; insertion loss; parallel-plate capacitor; piezoelectric filter; piezoelectrically movable electrode; quality factor; return loss; tuning mechanism effects; Band pass filters; Bandwidth; Capacitors; Electrodes; Frequency; Insertion loss; Q factor; Resonator filters; Tunable circuits and devices; Tuning;
Conference_Titel :
Microwave Conference, 2005 European
Print_ISBN :
2-9600551-2-8
DOI :
10.1109/EUMC.2005.1608914
