Patent ID: 6169468
Filing Date: 2001-01-02
Classification: H01P

Abstract:
A microwave device, comprising: a sidewall having a sidewall axis, a sidewall length L.sub.s measured parallel to the sidewall axis, and a coefficient of thermal expansion CTE.sub.s measured parallel to the sidewall axis; an endwall lying substantially perpendicular to the sidewall axis, the endwall having an endwall periphery affixed to the sidewall and an outwardly facing surface, the sidewall and the endwall together defining a microwave cavity; a rigid external support located outside the microwave cavity; and a thermal expansion compensation element outside of the microwave cavity and disposed between the outwardly facing surface of the endwall and the rigid external support, wherein the thermal expansion compensation element has a coefficient of thermal expansion CTE.sub.b measured parallel to the sidewall axis and wherein the thermal expansion compensation element has a length L.sub.b measured parallel to the sidewall axis of about L.sub.s.times.(CTE.sub.s /CTE.sub.b).