Accession Number : ADD011715

Title :   Dielectric Resonator Oscillators with Digital Temperature Compensation.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Slobodnik,A J

Report Date : 27 Mar 1985

Pagination or Media Count : 24

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 :   *PATENT APPLICATIONS, *RESONATORS, *COMPENSATION, *OSCILLATORS, CALIBRATION, CORRECTIONS, TABLES(DATA), DIELECTRICS, DIGITAL SYSTEMS, COUPLERS, DIRECTIONAL, TEMPERATURE, PHASE SHIFT, FUNCTIONS, FILTERS, DRIFT, FREQUENCY, STRIP TRANSMISSION LINES, PHASE SHIFT CIRCUITS, OSCILLATION, RADIOFREQUENCY, STABILITY, TEMPERATURE SENSITIVE ELEMENTS, CONTROL, PHASE SHIFT CIRCUITS, VOLTAGE

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE