本文描述了在三厘米波段，利用谐振腔测量介质的电特性ε和ｔｇδ的方法。分析了对所用测量设备的一些要求，对于测试的条件和测量的误差进行了初步的探讨。并给出一些国产介质材料的测试结果。 本文所述的方法可适用室温下测量ε不大于１０，ｔｇδ在１０－２—１０－４范围内的固体电介质材料。 This paper describes a method of measuring the electrical properties ε and tgδ of a medium using a resonator in the three centimeter band. Some requirements of the measuring equipment used are analyzed, and the conditions of the test and the errors of measurement are discussed preliminarily. And some domestic test results of dielectric materials are given. The methods described herein can be applied to solid dielectric materials having a measured ε of no greater than 10 at room temperature and a tgδ in the range of 10 -2 to 10 -4.