Material measurements are indispensable when researching and developing applications in the RF and microwave frequency ranges. PCBs, microwave circuit design, materials science, biological research, automotive engineering, and metrology and research institutions need to characterize various materials to better understand their impact on electromagnetic wave propagation to achieve more expected designs, or to test manufacturing processes to control product quality, etc. Similar problems from different application fields create a continuous demand for accurate characterization and measurement of dielectric properties of materials. At present, most of the industry uses measuring instruments and algorithm software such as vector network analyzers, impedance analyzers and LCR meters, coupled with various professional measuring fixtures, to accurately measure the dielectric constant, magnetic permeability and other parameters of materials through various methods.