Spatial measurements using solid-state microwave devices

Solid-state microwave devices are described, together with a discussion of radar systems using such devices. The Transferred Electron and the IMPATT devices, employed as transmitter and receiver oscillators are considered, as are the Field-Effect Transistors with gallium arsenide and the Schottky Barrier devices, the former used in receivers as low-noise amplifiers, the latter as mixer and detector diodes in receivers. The Doppler radar system for velocity measurements, the pulse Doppler radar system providing information for both velocity and range of targets, and the frequency modulated CW radar system for range measurements are taken into account. Projected applications of microwave radar techniques in the construction of safer cars are noted.