Microwave sensor has self-mixing oscillator, which generates transmission signal and mixes transmission and reception signals, in form of push-pull oscillator with two transistors

摘要

The microwave sensor has a current or voltage supply (1) with a self-mixing oscillator (2), an impedance (3) connected between the supply and oscillator, a transmitter and receiver antenna (4) and an evaluation circuit (5). The self-mixing oscillator, which generates the transmission signal and mixes the transmission and reception signals, is in the form of a push-pull oscillator with two transistors.