完美匹配微波表面及其在新概念微波器件中的应用

发生在自然媒质表面电磁波的Brewster效应本质上是角度选择性的。本项研究旨在通过引入增益媒质和非均匀媒质等概念、以及采用3D打印等先进制造技术，在微波毫米波频段实现符合原本通过数学定义的完美匹配层（PML）本构参数模型的新型微波材料，通过等效媒质方法获取具有宽带、全角度匹配吸收和匹配透明特性的PML微波表面。在此基础上，研究全新概念的隐身/自隐身微波器件、桌面微波暗室、微波毫米波空间调制器、以及最优微波能量接收表面等新概念微波器件，并实验演示其在微波隐身、微波测量及成像、新概念天线、无线能量传输等诸多领域中的应用。

The Brewster effect occurring on the surfaces of natural media is essentially angle-selective. In this project, we aim to implement at microwave frequencies a class of effective material by introducing the concept of gain media, inhomogeneous media and advanced 3-D printing fabrication technology. Satisfying the constitutive parameter models of perfectly matched layers (PMLs), such microwave surfaces are able to exhibit wide-band, all-angle Brewster effects, based on which new-concept microwave devices such as invisible/self-invisible devices, desktop anechoic chambers, microwave/mmWave spatial modulators, and optimal micowave energy receiving surfaces can be implemented and experimentally demonstrated. Such new-concept devices can be widely used in diverse applications in microave/mmWave area.