Temperature compensated resonant cavity

Details Temperature compensated resonant cavity Temperature compensated resonant cavity

1982-12-13

1984-12-11

Nussbaum, Marvin L.

Wave transmission lines and networks

Resonators

Cavity resonator

333230, 333252, H01P 706, H01P 130

Patent

active

044881320

ABSTRACT:
A resonant microwave cavity 2 has a bi-metal end cap 4 or a tri-metal end cap 26. The end caps 4, 26 include irises 10, 28. The end caps are affixed to walls of the cavity 2 in the usual manner. As temperature varies, the end caps or irises expand into or out of the cavity to compensate for the increase or decrease in length of the cavity walls due to variations in temperature. The internal volume of the cavity is maintained substantially constant. When a bi-metal end cap is used, each layer of metal has a different coefficient of expansion. When a tri-metal end cap is used, the center layer has the highest of coefficient of thermal expansion.

REFERENCES:
patent: 3414847 (1968-12-01), Johnson
Crain and Williams-"Method of Obtaining Pressure and Temperature Insensitive Microwave Cavity Resonators", The Review of Scientific Instruments, vol. 28, No. 8, Aug. 1957; pp. 620-623.

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