Abstract
This contribution highlights the usage of a high-quality voltage controlled oscillator (VCO) at 19.25 GHz fundamental frequency with a succeeding times four frequency multiplication scheme facilitating a 77 GHz output frequency. Signal tapping at the VCO's common emitter node allows obtaining the second-order harmonic tone that drives a single Gilbert frequency doubler. Beneficial to the PLL implementation is a reduced overall prescaler ratio allowing faster frequency ramps.
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