Microwave cavity tuner

Details Microwave cavity tuner Microwave cavity tuner

1983-09-15

1985-08-13

Nussbaum, Marvin L.

Wave transmission lines and networks

Resonators

Cavity resonator

333209, 333235, 333263, H01P 706

Patent

active

045353085

ABSTRACT:
In a microwave device, particularly a microwave local oscillator, frequency variations due to temperature changes are reduced by supporting the tuning element, for example a quartz or sapphire crystal, in the end of a tube of INVAR or other material having a low thermal coefficient of expansion. The tube projects into the cavity from a hole in one wall thereof. Preferably the tube is positively located relative to the cavity by means of an external lip on the tube abutting a shoulder formed by a reduced diameter part of the hold adjacent the cavity. The lip may be urged into positive contact with the shoulder by a spring washer acting between the end of the tube and the opposed end of a bush screwed into the hole.

REFERENCES:
patent: 2124029 (1938-07-01), Conklin et al.
patent: 3311839 (1967-03-01), Rutulis
patent: 3737816 (1973-06-01), Honicke

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