Patent ID: 8035465

Claim:
Cavity resonator ( 20 ; 40 ; 80 ; 70 ) with temperature compensation which comprises a pot ( 21 ; 41 ; 51 ; 61 ; 71 ) and a cover ( 22 ; 42 ; 52 . 1 , 52 . 2 ; 62 ; 72 ), which together enclose a cavity resonance volume (V), the cavity resonator having a characteristic resonance frequency in operation, which resonance frequency has a coefficient of temperature which is not equal to zero, wherein the pot ( 21 ; 41 ; 51 ; 61 ; 71 ) comprises a first material which has a first temperature expansion coefficient (α 1 ), the cover ( 22 ; 42 ; 52 . 1 , 52 . 2 ; 62 ; 72 ) comprises a second material which has a second temperature expansion coefficient (α 2 ), the second temperature expansion coefficient (α 2 ) being greater than the first temperature expansion coefficient (α 1 ) and an expansion of the pot ( 21 ; 41 ; 51 ; 61 ; 71 ) and a deformation of the cover ( 22 ; 42 ; 52 . 1 , 52 . 2 ; 62 ; 72 ) resulting upon a temperature increase which, together and also each individually, cause an enlargement of the cavity resonance volume (V), wherein further, the deformation comprises the cover bulging out due to the deformation thereof, resulting in an increase in the resonance frequency and an enlargement of the diameter of the pot due to the expansion of the pot, resulting in a reduction of the resonance frequency, the increase and the reduction of the resonance frequency thus essentially offsetting one another in order to ensure that the resonance frequency remains essentially stable in an operating temperature range.