Abstract
A mm-wave voltage controlled oscillator and frequency doubler for 18-GHz applications are presented. A 9-GHz voltage controlled oscillator is implemented by using a double LC-tank resonator to improve loaded Q at high frequencies. Inductive coupling is exploited to design an 18-GHz frequency doubler, which improves spurious rejection and immunity to supply noise. The prototype is implemented in a SiGe BiCMOS process and performs a FOM of -183 dBc/Hz at 19 GHz.
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