Analysis And Application For The Reflection Characteristics Of Metamaterials

In recent decades, the development of metamaterials caused widespread concern of researchers. In some frequency bands, the material will exhibit many unique electromagnetic properties, such as "Reverse Doppler Effect" and "Reverse Snell Refraction Phenomenon". These unique features make it very valuable in the microwave, optical, electromagnetic field. The layered media is the basic physical model of metamaterials, and reflection problem is the super-hot topic in engineering fields. Therefore, researching on reflecting problem of layered media is necessary for both theory and application. Current research methods for this problem include quasi-static field method, experimental - numerical method. However, these methods can not clearly explain the wave mode components of the reflection fields. And most of the models are built on low frequency, ignoring many high-frequency electromagnetic effects. Analytical method can solve the two problems effectively, and make the reflection characteristic of metamaterial more clear.Based on electromagnetic theory, this paper will construct general solution expressions for reflection fields excited by different dipole sources. For the half-space model, the mathematical characteristics for the reflection fields of different metamaterials will be given. Employ MATLAB software, the influent mechanisms of poles and branches for different metamaterials will be given comprehensively. According to steepest descent method, wave pattern analysis will be developed for reflection field analytical expression in this paper. This paper will obtain the wave patterns supported by different metamaterials and the propagation characteristics. And give appropriate prediction for application. Moreover, the results will be used in the analysis of high-impedance structure problem. The result can explain the surface wave suppression characteristics and identical phase reflection characteristics effectively. And , provides theoretical basis for experimental results. The method in this paper does not restricted by the structure size and application frequency of high-impedance structure. It is convenient to develop further analysis for the structure.The results will provide basic information to other researches on electromagnetic properties of metamaterials. The Sommerfeld integral method used in this paper can provide new ideas for analysis on metamaterials reflection field in high frequency situation. And make the designing for metamaterials more rational. Moreover, provides basis for further development of metamaterials.