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The rubidium atomic clock based on coherent population trapping (CPT) has advantages of low power consumption, small size and quick start-up. It is potential to be applied in many fields of science. The rubidium atomic clock requires a microwave signal source whose center frequency is 3.417GHz (half of the rubidium atomic hyperfine energy difference) with the ability to be tuned during a certain frequency...
With the progress of science and technology, astronomy, navigation, space travel and other fields need higher precision time and frequency standards to provide a strong guarantee. Atomic clocks based on coherent population trapping (CPT) can not only meet the accuracy requirement, but also be improved in the direction of miniaturization and low power consumption. Cesium atomic clocks have superiority...
A 15 GHz voltage-controlled-oscillator (VCO) with coupled coplanar waveguide (CCPW) inductor for LC resonator is proposed in this work. Methods including optimization of varactors and CCPW are applied to minimize the supply voltage and current. The CCPW is fabricated with the second top metal layer to improve the quality factor and isolate noise from substrate. The VCO is implemented using IBM 90...
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