Tracking Phaselock Loop Characteristics with a VCO Using a Barium Strontium Titanate (BST) Thin-Film Varactor

Barium strontium titanate (BST) varactors utilized in a VCO demonstrate unique tuning characteristics compared to junction varactors. A 2.7 GHz microstrip line VCO operates in a tracking phaselock loop configured as an X4 frequency multiplier. BST oscillator tuning and the effect on loop dynamics is observed by the intentional design of an under damped… (More)