Accession Number : ADA256462


Title :   Frequency Shifts in a Rubidium Frequency Standard due to Coupling to another Standard


Descriptive Note : Technical rept.


Corporate Author : AEROSPACE CORP EL SEGUNDO CA ELECTRONICS TECHNOLOGY CENTER


Personal Author(s) : Jaduszliwer, B ; Cook, R A ; Frueholz, R P


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a256462.pdf


Report Date : 15 Oct 1991


Pagination or Media Count : 15


Abstract : Highly reliable timing systems, such as used on board satellites, may incorporate a hot standby atomic clock besides the active one. RF couplings between them may affect the performance of the active clock. We have investigated the effect of such couplings between two rubidium atomic clocks and found that they will add an oscillatory term to the Allan Variance of the active clock, degrading its frequency stability, and that under certain circumstances they may also shift the active clock's operating frequency. We discuss these two effects in detail, and establish the level of isolation required to render them negligible. Atomic clock, Allan Variance, RF coupling.


Descriptors :   *COUPLINGS , *RUBIDIUM , *FREQUENCY SHIFT , *FREQUENCY STANDARDS , FREQUENCY , STABILITY , ATOMIC CLOCKS , CLOCKS , ISOLATION , ARTIFICIAL SATELLITES , OSCILLATION


Subject Categories : Inorganic Chemistry
      Electricity and Magnetism
      Atomic and Molecular Physics and Spectroscopy
      Radiofrequency Wave Propagation


Distribution Statement : APPROVED FOR PUBLIC RELEASE