Accession Number : ADD009472

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

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Allan,David W ; Garvey,R Michael

Report Date : 25 May 1982

Pagination or Media Count : 8

Abstract : Perceived atomic resonance frequency error resulting from microwave power level changes in atomic clocks is eliminated by controlling the device's 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 :   *Patents, *Power levels, *Microwaves, *Atomic beams, *Frequency stabilizers, Radiofrequency power, Frequency standards, Circuits, Cesium, Power supplies, Atomic spectroscopy, Inventions

Subject Categories : Electric Power Production and Distribution
      Atomic and Molecular Physics and Spectroscopy
      Nuclear Physics & Elementary Particle Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE