The complex permittivity measurement of powder materials and the dielectric constant of lunar soil

The method and system of the complex permittivity measurement for powder materials in the band from 1 GHz to 39 GHz are introduced in the paper. As the key of the measurement technology, the de-embedding technology was researched and the influence of sample holder was removed by transmission/reflection line (TRL) calibration and two transmission lines method. The experiment results verify that accuracy of the measurement system is better than 5% in the full band. Finally the dielectric characters of lunar soil simulators were researched using the system. The relative complex permittivity of lunar soil simulators were gotten from 1 to 39 GHz.