GaAs monolithic circuit for FMCW radars

Abstract
A brief description is given of a monolithic GaAs chip that incorporates a varactor-tuned voltage-controlled oscillator (VCO), buffer amplifier and double balanced mixer with active phase splitters for an FM continuous-wave (CW) radar transmit-receiver. The circuit operates between 4 and 6 GHz with a 200 to 400 MHz tuning range with excellent VCO-tuning linearity, very high external quality factor, and low 1/f noise at the 5-kHz-to-10-MHz output port, achieved at reduced size.<>

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