ROUND-ROBIN TEST ON A DIELECTRIC RESONATOR METHOD FOR MEASURING COMPLEX PERMITTIVITY AT MICROWAVE FREQUENCY

The dielectric resonator method is now widely accepted as a precise measurement method for determining the dielectric properties at microwave frequencies. This paper describes the measurement results of epsilon(r), tan delta and TC(f) determined by a round robin test of this method. The resultant measurement errors were DELTAepsilonr/epsilon(r)=0.10%, DELTA tan delta < 0.5 X 10(-5) and DELTATC(f) < 0.5 ppm/K, where DELTA denotes a standard deviation. The causes of measurement errors and the conditions to improve the measurement accuracy are discussed.