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In this work, The mechanical movements of a piezoelectric actuator is used to change the capacitance values of an air-gap capacitor. With a bias voltage up to 200 V the effective air gap size, Seff, increases continuously from 5 mum to 10.5 mum. Due to that the coupling capacitance is tuned from 0.22 pF to 0.1 pF, i.e. tuning ratio of 2.2. When employing in hybrid packaged tunable voltage-controlled...
Tunable voltage controlled oscillators (VCO's) are expected to be useful in enhancing the multi-band pro- grammability of wired/wireless communication terminals. A voltage tunable oscillator employing barium strontium titanate (BST) tunable capacitor is presented. The utilized BST tunable capacitor shows a tuning of 20% at 35 GHz. The oscillation frequency of the voltage controlled oscillator (VCO)...
A simple but efficient architecture based on up-conversion of impulse radio (IR) signals at 55 GHz is presented. This complete architecture has been designed using a pHEMT foundry process (ft =100 GHz). Key results on mm-waves devices-VCO, frequency doubler, RF switch, LNA and RF detector-are presented and discussed. Baseband devices, composed of a pulse generator and a sample-and-hold amplifier,...
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