A HBAR-oscillator-based 4.596 GHz frequency source: Design, characterization and application to a Cs microcell atomic clock
Résumé
The project aims to develop a 4.596 GHz MEMS HBAR-based microwave voltage controlled oscillator devoted to be used as a local oscillator in a Cs vapor microcell-based CPT atomic clock. These miniature high-spectral purity oscillators are interesting candidates to replace conventional local oscillator architectures using a 4.6 GHz VCO phase-locked to a 10 MHz quartz oscillator (TCXO) through a fractional N-PLL system. Today, about a half of the total power consumption of miniature atomic clocks is dedicated to the local oscillator module. The development of MEMS HBAR oscillators stands as an exciting opportunity to reduce drastically the power consumption of miniature atomic clocks, with additional improvement of absolute phase noise performances. These aspects could help miniature CPT-based atomic clocks to be of great interest in mobile and embedded systems where spectral purity of the local clock is crucial, such as radar defense systems.
Domaines
Autre
Origine : Fichiers produits par l'(les) auteur(s)