Tunable Capacitive Coupling for Cavity Resonator Filters

Author

Höft, Michael

Author_Institution

Panasonic Electron. Devices Eur. GmbH, Lueneburg

fYear

2009

fDate

16-18 March 2009

Firstpage

1

Lastpage

4

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2009 German

Conference_Location

Munich

Print_ISBN

978-3-9812668-0-1

Electronic_ISBN

978-3-8007-3150-3

Type

conf

DOI

10.1109/GEMIC.2009.4815881

Filename

4815881