Title :
Tunable Capacitive Coupling for Cavity Resonator Filters
Author_Institution :
Panasonic Electron. Devices Eur. GmbH, Lueneburg
Abstract :
In this paper two different bandpass filters are discussed, which consists of 4 and 5 stepped coaxial resonators, respectively. The resonators have different size. Therefore, different temperature compensation arrangements need to be applied to guarantee stable performance in the temperature range from -40degC to 85degC. Both filters have a center-frequency of 2.0175 GHz, a bandwidth of 15 MHz and cross-coupling by a cascaded quadruplet for improved blocking performance. The cross-coupling is realized by a tunable capacitive coupling. The tuning capability is validated by measurements and simulations. As a result, the coupling strength is tunable by factor 5.
Keywords :
band-pass filters; cavity resonator filters; compensation; coupled circuits; bandpass filters; bandwidth 15 MHz; cascaded quadruplet; cavity resonator filters; coaxial resonators; cross-coupling; temperature -40 degC to 85 degC; temperature compensation; tunable capacitive coupling; Assembly; Band pass filters; Cavity resonators; Coaxial components; Insertion loss; Microwave filters; Plastics; Probes; Resonator filters; Temperature distribution;
Conference_Titel :
Microwave Conference, 2009 German
Conference_Location :
Munich
Print_ISBN :
978-3-9812668-0-1
Electronic_ISBN :
978-3-8007-3150-3
DOI :
10.1109/GEMIC.2009.4815881
