A Simple Technique for Real-Time Measurement of Complex Reflection Coefficient (Correspondence)

A simple method for making real-time measurements of complex reflection coefficient p_x is described. The technique uses a hybrid tee and two crystal detectors to provide analog outputs from which the reflection coefficient is obtained. Sample measurements of p_x made at 34.3 GHz are presented which indicate a precision of greater than 0.02 units and 0.05 radians in magnitude and argument, respectively, for 0.1 ≤|p_x|≤ 1.0.