A study on jig fabricated by microstrip line for S-parameter method

In this paper, to improve the measurement precision, a jig fabricated by microstrip line is examined. The microstrip line fabricated using a milling machine increases machining accuracy and reproducibility. Three compensating methods using ABCD-matrix, called open-correction, shortcorrection, and open-short-correction, are applied to eliminate the influence of the jig for the Sparameter method. The wideband input impedance of a dipole antenna, which is one of typical balanced fed antennas, is measured using our proposed methods, and are compared with a measured result using a jig fabricated by semi-rigid cable and a calculated results using the moment method.