Radio frequency filter having a temperature compensated...

Details Radio frequency filter having a temperature compensated... Radio frequency filter having a temperature compensated...

H - Electricity

01

P

333/57

H01P 7/10 (2006.01) H01P 1/20 (2006.01)

Patent

CA 1234882

RADIO FREQUENCY FILTER HAVING A TEMPERATURE COMPENSATED CERAMIC RESONATOR Abstract An RF filter (100) includes a ceramic resonator (116) sandwiched between first and second compensating discs (114 and 120) for temperature compensation, low loss mounting and heat sinking of the ceramic resonator (116). Good thermal contact between the ceramic resonator (116) and discs (114 and 120) is produced by a compressive force applied by copper plates (112 and 128) and copper can (124). The resonant frequency of the RF filter is tuned by means of a copper-plated invar tuning shaft (104) and ceramic tuning slug (118) which are positioned by brass bushing (134) in copper pipe (130 and 132). Input and output signals are coupled to the RF filter via respective probes (122).

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