Active hydrogen maser atomic frequency standard
Atomic beam frequency standard having RF chain with higher frequ
Atomic clock employing ion trap of mono- or multi-planar geometr
Atomic clock system with improved servo system
Atomic frequency oscillator
Atomic frequency standard based upon coherent population...
Atomic frequency standard using digital processing in its freque
Atomic frequency standard using free induction technique
Atomic frequency standard using optical pumping for state prepar
Atomic or molecular beam frequency standard with optical pumping
Autolock for resonators for frequency standards