Investigation On Permittivity Measurement Methods Of Microwave Dielectric Materials

This paper mainly studies the microwave permittivity measurement techniques of dielectric materials.As a main function parameter of dielectric material, measurement methods of permittivity are diverse.Progress along with science and technology, the dielectric materials apply with a lots science realms , therefore, the better measurement techniques are demanded.This paper introduces the traditional slotted line theory and takes this as the foundation, discussing the hardware and software of auto slotted line system and its design.Next, In order to obtain the complex dielectric constant in terms of parameters measured by auto slotted line,a higher order power series solution has been introduced.The measuring results are accurate.Finally, the simple discussion is made for measurement error of automatic slotted line. A method, named Subsection Calibration method of crystal diode radio detector, is used to minimize the measurement errors aroused by crystal diode radio-detector effectively during the course of measuring. The error network parameters of slotted line can solved by little reflection slip load,and then,with it the network's input reflection coefficient can be analyzed and optimized. Experimental results indicate that error analysis in the paper is available and improves measurement precision.