USE OF THE AUTODYNE DETECTION EFFECT IN SEMICONDUCTOR MICROWAVE-OSCILLATORS TO BUILD RADIOWAVE INSPECTION DEVICES

The feasibility of using the autodyne detection effect in diode microw ave oscillators for checking the parameters of materials is substantia ted theoretically on the basis of numerical analysis. The response of a diode microwave autodyne is described on the basis of a discussion o f the equivalent circuit of an oscillator in which the complex conduct ance of the load is determined by the parameters of the material studi ed and the characteristics of the electrodynamic system. Information f rom theoretical and experimental studies is given about building a non destructive testing instrument with an operating principle based on th e autodyne detection effect: thickness gauges for metal-insulator stru ctures and dielectric-constant meters.