A modulated subcarrier technique with instantaneous amplitude and phase information

An accurate and instantaneous microwave phase and amplitude measurement technique is described, that makes use of a single-sideband generator and a single-sideband detector. The phase and amplitude values of a microwave signal are transposed to an IF signal of a convenient frequency. The dynamic range may be as high as 80 dB and the phase and amplitude errors in this range are below 1° and 0.1 dB, respectively.