Maximum Efficiency of a Two Arm Waveguide Junction (Correspondence)

It is well-known that the efficiency of a two-arm waveguide junction (2-port) depends upon the reflection coefficient /spl Gamma//sub L/ of the load with which one of the arms is terminated. The efficiency is known to vary between the limits 0 and /spl eta//sub m/ (maximum efficiency) as /spl Gamma//sub L/ assumes all possible values within the unit circle. However, there seems to be no published analysis from which one can determine the particular /spl Gamma//sub L/ giving maximum efficiency if the characteristics of the waveguide junction are known.