Resonator aperture as an antenna for measuring media variables

Abstract

The use of microwaves to measure conditions of various processes seems to be highly attractive, however the microwave (SHF) methods are still used rarely. The reasons are as follows: a higher cost of microwave system components (e.g. in comparison with LF equipment), and an optics-like (i.e. extremely high) standard of system adjustment. The same is true for the most precise microwave method of material parameters monitoring — a resonator method. To control fluids one has to apply thin tubes putting them inside the resonator, and it is often unacceptable for commercial installations.