Temperature compensating cavity bandpass filter

Details Temperature compensating cavity bandpass filter Temperature compensating cavity bandpass filter

H - Electricity

01

P

H01P 1/30 (2006.01) H01P 7/04 (2006.01) H01P 7/06 (2006.01) H03H 9/02 (2006.01)

Patent

CA 2312318

A method and apparatus for frequency stabilization of cavity filters of the class including an outer tubular conductor and an inner conductor is effected by supporting the inner conductor of the resonant cavity by an apparatus comprised of a reference collar and an interface collar connected together by a means having a first coefficient of thermal expansion. The reference collar is structurally connected to the reference end of the outer tubular conductor by adjustable tuning means. It is not connected directly to the inner conductor. The inner conductor is structurally connected to the interface collar by a means having a second coefficient of thermal expansion. The first coefficient of thermal expansion and the second coefficient of thermal expansion are selected to provide compensation for the difference in thermal expansion between the outer conductor and the inner conductor of the cavity filter.

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