Design and Application of Multilayer Medium for Impedance Matching Based on Transmission Model

The mature application of sensor technology and target recognition technology in the military field has promoted the rapid development of dielectric material technology. The degree of impedance matching and absorbing loss mechanism of multilayer dielectric materials are important factors affecting the transmission loss of electromagnetic waves in the medium. In this paper, according to the terminal characteristics of the application case, the multilayer medium is divided into two types: the open-circuit type and the short-circuit type. The physical layer structure model and the transmission equivalent model are established respectively. Aiming at the impedance matching problem, based on the field characterization of the multilayer medium and the equivalent wave impedance method, the impedance matching constraint relationship of the electromagnetic parameters and thickness parameters of the multilayer medium is derived. The prototype design and development are carried out, and the test results verify the effectiveness of design methods.