AN INSTRUMENT FOR MEASURING THE RADIO QUALITY OF DIELECTRIC MATERIALSAND ARTICLES AT MICROWAVE-FREQUENCIES

The problem involved in constructing a radio-wave monitoring device at microwave frequencies for the accurate measurement of the phase of th e transmission coefficient of a plane electronmagnetic wave through a dielectric specimen or a dielectric article of limited area are consid ered. The circuit of a precision measuring instrument which uses the m odulated-reflection method is described. The main components of the me asurement error are considered. Ways of improving and extending the po ssibilities of the instrument are indicated.