Six-port reflectometer capable of optimum performance

The authors describe a six-port reflectometer consisting of a symmetrical five-port waveguide junction and a directional coupler. Theoretical and experimental results show that such an instrument can yield optimum measurement performance over about 80% of the waveguide bandwidth. Measurements taken using the prototype reflectometer indicate that accuracies of +or-0.005 in magnitude and +or-0.5 degrees in phase are obtainable.<
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