A general vector network analyzer employs a super-heterodyne scheme to expand a measuring frequency band. The circuit structure is complicated because of implementing mixers, local oscillators, and amplifiers, therefore, the cost is not affordable. In order to simplify the circuit structure and be affordable, we employ a homodyne scheme, that is the six-port method. In this report, we demonstrated the performance of a six-port reflectometer in the V-band based on a waveguide standing wave detector.