Dielectric Resonator Oscillators with Digital Temperature Compensation.
Patent, Filed 27 Mar 85, patented 8 Dec 87,
DEPARTMENT OF THE AIR FORCE WASHINGTON DC
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A digital compensation circuit for improving the temperature stability of dielectric resonator oscillators is disclosed. A temperature sensor indicates a measure of ambient temperature which is correlated with an amount of phase shift necessary to compensate for frequency drift in a dielectric resonator oscillator. The correlation is made using a correction table or correction function which is determined empirically in a calibration process. The necessary phase shift is then supplied via a voltage controlled phase shifter. This phase shifter is part of the RF oscillation loop which also includes an amplifier, directional coupler and dielectric resonator filter including microstrip.
- *TEMPERATURE SENSITIVE ELEMENTS
- *THERMAL STABILITY
- DIGITAL SYSTEMS
- PHASE SHIFT
- PHASE SHIFT CIRCUITS
- STRIP TRANSMISSION LINES
- Electrical and Electronic Equipment