Thermally compensating microwave cavity

A temperature compensating device for compensating microwaves passing through a microwave cavity such that a compensated microwave signal is emitted from said cavity, said device comprising:

• a) at least one member defining a broad bandwidth microwave cavity;
• b) an active device, that is stationary relative to said member, that generates microwaves within said microwave cavity such that a first portion of said microwaves travels through said cavity away from said active device and a second portion of said microwaves travels through said cavity away from said active device in an opposite direction;
• c) reflecting means disposed within said cavity for reflecting said second portion of said microwaves such that said second portion combines with said first portion to form a thermally compensated signal;
• and
• d) an expandable and contractible bellows having a thermal expansion coefficient, said bellows operably associated with said reflecting means for moving said reflecting means relative to the active device as said bellows expands and contracts with changes in temperature.

The temperature compensating device for compensating microwaves passing through a microwave cavity such that a compensated microwave signal is emitted from said cavity, said device comprising:

• a) at least one member defining a broad bandwidth microwave cavity;
• b) generating means for generating microwaves within said microwave cavity such that a first portion of said microwaves, traveling in one direction from said generating means, form a broad bandwidth signal that passes through said microwave cavity;
• c) reflecting means for reflecting a second portion of said microwaves, traveling in another direction from said generating means, such that said second portion of microwaves is reflected to combine with and compensate said broadband signal formed by said first portion;
• and
• d) temperature dependent displacing means for displacing said reflecting means and said generating means relative to one another, said reflecting means and said displacing means being coupled to an attaching means such that said reflecting means and said displacing means can be removably attached as a unit to said member defining said microwave cavity, said reflecting means slidingly engaging said attaching means as a result of temperature changes in said temperature dependent displacing means, thereby positioning said reflecting means to compensate for changes in said broad bandwidth signal as a result of temperature changes in said generating means.