Phon Ratanak, Lim Sungjoon
School of Electrical and Electronic Engineering, Chung-Ang University, Heukseok-dong, Dongjak-gu, 156-756, Republic of Korea.
Sci Rep. 2020 May 26;10(1):8703. doi: 10.1038/s41598-020-65318-0.
In this paper, a radio frequency (RF)-power-modulated active metamaterial loaded with a nonlinear Schottky diode is presented. Its operating mode is a function of the incident power level. It is switched by a change in the operating state (i.e., on/off) of the Schottky diode, which is directly triggered by a change in the incident power level. For instance, when a low-power RF radiation is incident on the proposed metamaterial, the Schottky diode is turned off, and the metamaterial passes a 2 GHz signal in the pass-band mode. By contrast, when a high RF power is incident, the diode is turned on, and the metamaterial reflects all frequencies in the reflection mode. The proposed active metamaterial was analysed by performing numerical simulations for both low- and high-power modes, and the proposed concept was successfully demonstrated by circuit analysis, full-wave simulation, and experimental results.
本文介绍了一种加载非线性肖特基二极管的射频（RF）功率调制有源超材料。其工作模式是入射功率水平的函数。它通过肖特基二极管工作状态（即开/关）的变化进行切换，而这种变化直接由入射功率水平的变化触发。例如，当低功率射频辐射入射到所提出的超材料上时，肖特基二极管关闭，超材料以通带模式传输2 GHz信号。相比之下，当高射频功率入射时，二极管开启，超材料在反射模式下反射所有频率。通过对低功率和高功率模式进行数值模拟分析了所提出的有源超材料，并通过电路分析、全波模拟和实验结果成功验证了所提出的概念。
