Intelligent Radome Design With Multilayer Composites to Realize Asymmetric Transmission of Electromagnetic Waves and Energy Isolation

An intelligent radome that can realize asymmetric propagation of electromagnetic (EM) wave and energy isolation is presented and investigated in this letter. The radome is constructed with multilayer composites. The whole structure mainly consists of a broadband polarization-sensitive polarization converter (PC) and a frequency selective rasorber (FSR) with p-i-n diodes embedded. Among them, the function of PC is to make the EM waves transmit asymmetrically, whereas the FSR loaded with diodes can absorb incident high-power waves, which acts as an energy-selective surface. Thus, the radome can realize both asymmetric transmission of EM wave and EM shielding flexibly. The fabricated structure with 7 × 7 unit cells is experimentally demonstrated using two different measurement methods after full-wave simulation and optimization. The radome has the potential application in EM stealth and high-power EM waves (HPEMWs) shielding, considering the distinctive characteristic of self-actuation.