BANDWIDTH EXTENSION FOR LINE-SERIES-SHUNT CALIBRATION TECHNIQUE OF BROADBAND S-PARAMETER MEASUREMNTS

摘要

This paper presents a new method for extending the bandwidth of LINE-SERIES-SHUNT (LST) calibration in microwave scattering parameter measurements, by using additional lines in SERIES and SHUNT standards. The minor modifications of the standards avoid the ill-conditioned problem for the self-calibration equations as the phase shift of the LINE standard approaching 0 or 180 degrees. Simulation studies are demonstrated with Gaussian white noises to ensure applicability and robustness of the proposed approach. The further experimental verifications are performed using the printed-circuit-board (PCB) from 45 MHz to 20 GHz.