Measurement of the permittivity and loss tangent of dielectric sheets

A previously introduced resonant measurement technique is extended to include dielectric sheets. The technique is not limited by the sheet's thickness or dielectric constant because it involves a full-wave analysis of the fixture. A method to account for conduction loss due to the surface resistance of the metal walls of the fixture is presented. Experimental results are presented and compared to previously reported values, and are in excellent agreement. © 1997 John Wiley & Sons, Inc. Microwave Opt Technol Lett 15: 355–358, 1997.