A program for computer-controlled impedance measurement within the microwave range

A program for computer-controlled impedance measurement on antennas, by means of a network analyzer, sweep generator, and frequency counter, is presented. The reflection factor was measured. The corresponding scattering parameter was determined in the form of its amount and phase from which the complex number S11 was obtained, corrected by parameters, and stored on a file specified by the user. The correction parameters were determined by a calibrating routine preceding the measurement. A minicomputer was used for control and monitoring of the measuring data. A program plotting the S-parameters in a Smith chart is shown.