Accession Number : ADD013657
Title : Dielectric Resonator Oscillators with Digital Temperature Compensation.
Descriptive Note : Patent, Filed 27 Mar 85, patented 8 Dec 87,
Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC
Personal Author(s) : Slobodnik, Andrew J , Jr ; Stiglitz, Martin R ; Roberts, George A ; Webster, Richard T
Report Date : 08 Dec 1987
Pagination or Media Count : 10
Abstract : 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).
Descriptors : *DIELECTRICS, *RESONATORS, *TEMPERATURE SENSITIVE ELEMENTS, *THERMAL STABILITY, *PATENTS, CALIBRATION, CIRCUITS, COMPENSATION, CONTROL, CORRECTIONS, COUPLERS, DETECTORS, DIGITAL SYSTEMS, DIRECTIONAL, DRIFT, FILTERS, FREQUENCY, FUNCTIONS, LOOPS, OSCILLATION, OSCILLATORS, PHASE SHIFT, PHASE SHIFT CIRCUITS, RADIOFREQUENCY, STRIP TRANSMISSION LINES, TABLES(DATA), TEMPERATURE, VOLTAGE
Subject Categories : Electrical and Electronic Equipment
Distribution Statement : APPROVED FOR PUBLIC RELEASE