Design Of Microwave Lens Based On Huygens' Surfaces For Manipulation Of Electromagnetic Wave

By studying the relationship between subwavelength scale material and electromagnetic waves,metasurface break the natural characteristic of the material,giving the material a new electromagnetic characteristic,and provide an infinite possibilities to the design of electromagnetic devices.Huygens surface is design by the Huygens theory,and the theoretical loss of 0 is it's most unique feature,that can effectively enhance the efficiency of the metasurface,with great advantages.The main contents of this article are as follows:First,the Huygens surface theory system was studied.Based on the GSTCs model,the mathematical model of the artificial electromagnetic scatter is demonstrated,and the theory is combined with the Huygens principle to introduce the electromagnetic polarization response current in the Huygens surface.And we deduce the transmission coefficient,and the reflection coefficient mathematical expression of the Huygens surface.Secondly,the equivalent circuit of Huygens surface is studied,and the design of Huygens transmission phase control unit is carried out with electromagnetic resonance unit as the basic design method.The design of the unit structure,including the parallel metal strip,double open ring,open double rings as the representative of the electrical resonance structure,and open ring,open double rings as the representative of the magnetic resonance structure.Through the organic combination of the electromagnetic resonance structure,the design of the transmission phase control unit in the range of 360 with low loss of is realized,and the Huygens surface theory is analyzed for the surface response current.Finally,based on the generalized Snieler principle and the equivalent wave source theory,the design and simulation of the electromagnetic wave refraction lens and the electromagnetic wave converging lens are carried out in combination with the designed transmission phase control unit.The designed 45 electromagnetic wave refraction lens produces a good refraction effect on the polarized wave of the perpendicular incident line,which is close to the theoretical value.At the same time,the equivalent wave source theory is used to design the single point and the bifocal lens.According to the simulation results,the designed lens has good convergence effect of electromagnetic wave,which is consistent with the theoretical value.