The Research Of Metamaterials Based On SISL

Metamaterials are synthetic materials with artificial physical properties that do not exist in nature.Their special properties are not due to the use of special materials,but their special periodic structures.Relative dielectric constant and relative permeability are used to describe its unique physical properties.Metamaterials have a lot of room for development in many fields.The main work of this thesis is as follows:First,the research background and significance of metamaterials are introduced.Then the main characteristics of metamaterials are presented,and the application of metamaterials in some major fields is listed.Secondly,the equivalent material theory of metamaterials is analyzed,and the equivalent parameters extraction method of metamaterials is introduced and verified.Then,a metamaterial structure with high dielectric constant was proposed.The structure was studied with the assistance of electromagnetic simulation software.By analyzing its electrical resonance,magnetic resonance,electromagnetic resonance and weak resonance modes,its relative permittivity and relative permeability were studied.Its relative permittivity can reach a maximum value of 300 in the electrical resonance state.And based on the new SISL(Substrate Integrated Suspension Line)technology platform,a SISL metamaterial structure with high dielectric constant characteristics is realized,providing a new idea for the miniaturization design of the module circuit.Finally,the basic knowledge of the filter is introduced.Firstly,a microstrip step impedance filter is designed.Then,based on the microstrip step impedance filter,a step-impedance low-pass filter based on SISL is designed to verify that the designed SISL-based high dielectric constant metamaterials have the characteristics of circuit miniaturization.The verification shows that the filters using SISL-based high dielectric constant metamaterial can be reduced in size by 41.2% over equivalent filters.