Transmission Line Method for the Measurement of Microwave Permittivity andPermeability

摘要

This memo gives a full description of a method for determining complexpermittivity and permeability at microwave frequencies from 2-port S-parameter measurements of lossy solids in coaxial or waveguide transmission lines. The use of the TRL calibration scheme allows the measuring system to be calibrated right up to the specimen faces thereby eliminating most of the sample cell from the measurement and allowing suitable materials to be moulded directly into the specimen cell in order to eliminate air gaps between specimen and transmission line walls. Some illustrative measurements for dielectric and magnetic materials are presented.