Accession Number : ADD005281

Title :   Microwave Power Level Stabilizing Circuit for Cesium Beam Frequency Standards.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON D C

Personal Author(s) : Allen,David W

Report Date : 19 Jul 1978

Pagination or Media Count : 21

Abstract : Perceived atomic resonance frequency error resulting from microwave power level changes in atomic clocks is eliminated by controlling the device microwave power source output in response to deviations from a fixed frequency relationship between the main atomic peak and a sidelobe peak of the atomic beam frequency spectrum. This is accomplished by a microwave power control servo system that includes a time sharing interrogation circuit for detecting and monitoring the frequencies of the main atomic peak and the sidelobe peak and a comparator that compares the frequencies of the main atomic and sidelobe peaks and generates a feedback control signal in response to frequency differences between the two that deviate from a fixed difference frequency. The feedback signal is used to control the microwave power source output in a manner that constrains the main atomic peak and the sidelobe peak at a fixed offset frequency. (Author)

Descriptors :   *Patent applications, *Microwaves, *Power levels, *Circuits, *Cesium, *Atomic clocks, Stabilization, Frequency standards, Resonant frequency, Error analysis, Time interval counters, Servomechanisms

Subject Categories : Electrical and Electronic Equipment
      Test Facilities, Equipment and Methods
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE