發(fā)布時間：2018-07-13 11:35

【摘要】：針對以往的人工電磁表面器件只能實現(xiàn)一種電磁功能的現(xiàn)象,提出一種可以根據(jù)電磁波極化方向改變其反射方向的人工電磁表面.依據(jù)廣義菲涅爾反射定律,通過選擇x和y方向上的相位梯度分布,電磁波在兩個方向反射角可任意調(diào)節(jié).以具有兩個參數(shù)可調(diào)的矩形三明治結(jié)構(gòu)為基本單元,基于數(shù)值擬合的方法合理選擇單元尺寸,搭建6周期和12周期的極化反射人工電磁表面,CST仿真表明,該人工電磁表面系統(tǒng)對x極化和y極化入射的電磁波其反射方向完全相反,并且其反射角可以通過改變周期進行靈活調(diào)節(jié),仿真結(jié)果和理論分析相吻合.該方法設(shè)計的極化反射人工電磁表面器件與傳統(tǒng)的極化反射器件相比具有設(shè)計簡單、體積小、成本低等優(yōu)勢.
[Abstract]:In view of the phenomenon that artificial electromagnetic surface devices can only realize one kind of electromagnetic function in the past, an artificial electromagnetic surface which can change its reflection direction according to the polarization direction of electromagnetic wave is proposed. According to the generalized Fresnel's law of reflection, by selecting the phase gradient distribution in the x and y directions, the reflection angle of the electromagnetic wave can be adjusted arbitrarily in both directions. Taking the rectangular sandwich structure with two parameters adjustable as the basic element and selecting the unit size reasonably based on the numerical fitting method, the simulation of the polarized reflection artificial electromagnetic surface (CST) with 6 cycles and 12 cycles is built. In this artificial electromagnetic surface system, the reflection direction of x polarization and y polarization incident electromagnetic waves is completely opposite, and the reflection angle can be adjusted flexibly by changing the period. The simulation results are in good agreement with the theoretical analysis. Compared with the traditional polarimetric reflectors, this method has the advantages of simple design, small size and low cost.
【作者單位】： 蘭州理工大學電氣工程與信息工程學院;蘭州城市學院培黎工程技術(shù)學院;
【基金】：國家自然科學基金(61302116) 甘肅省自然科學基金(148RJZA021)
【分類號】：O441.4
，

本文編號：2119225