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The first prototype of an eXtra Small Atomic Resonator (XSAR) was presented by CSEM at the 2009 EFTF conference. This paper describes the progress realized until 2011 towards the realization of a low-power miniature atomic clock. We here present the third generation of the prototype, merging for the first time the physics and electronics packages on a single printed circuit board.

The detailed design of the Swiss Miniature Atomic Clock (Swiss-MAC) was presented by CSEM in 2012. This paper describes the progress made in the meantime towards the realization of the integrated Swiss-MAC, by presenting a first prototype showing preliminary but very promising performances.