| 摘要 |
Frequency stabilization of an oscillator by compensating for slow frequency variations due to ambient temperature variations is achieved by diverting a fraction of the oscillator output to a waveguide line section having a coefficient of thermal expansion/ DEG C which is greater than the coefficient of relative frequency drift/ DEG C of the oscillator comprising, in sequence, a variable attenuator and a movable short. The variable attenuator is used to primarily adjust the amplitude of the diverted signal by one-half the desired amount preferably without varying the phase of the diverted signal. The movable short is primarily used for signal phase adjustment while simultaneously reflecting the attenuated signal back through the attenuator and towards the oscillator output. Temperature variations which cause impedance changes in the oscillator, and in turn frequency changes at the output thereof, similarly affect the components of the divergent waveguide line section to produce reactive load variations therein of corresponding magnitude and opposite sign to the impedance changes in the oscillator.
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