A Method of Determining the Mismatch Correction in Microwave Power Measurements

With the increasing demands for accuracy in microwave measurements, mismatch corrections are assuming an increased importance. In the application of a terminating-type power meter, the appropriate mismatch factor involves the complex reflection coefficients of the generator, load, and power meter. Instead of measuring the individual reflection coefficients, which usually calls for the use of a slotted line, a directional coupler technique is described that obtains the mismatch factor directly.