Microwave bridge reflectometer

A form of the microwave reflectometer which yields a reflection-coefficient angle as well as modulus is discussed and its analysis presented. A simple compensation method is described whereby the measurement errors due to imperfect performance of the directional couplers can partially be eliminated and partially be allowed for. Finally, the measurement accuracy obtainable from this reflectometer system is shown to be approximately that obtainable from the conventional slotted waveguide section, and hence the system provides an alternative to the slotted section at the millimetre wavelengths.