Abstract

This paper presents a functionally reconfigurable metamaterial (FRM) that can satisfy military requirements for electromagnetic communication, radar stealth and high-power electromagnetic shielding. Specifically, the developed FRM is composed of a lossy layer and a frequency selective surface (FSS), which could achieve three different modes by adjusting the tunable resistors and PIN diodes within the FRM. Furthermore, the operating mechanisms of the FRM in these three modes have been analyzed in detail using an equivalent circuit model and transmission line theory. To validate the aforementioned analysis, the FRM was designed and simulated based on these operating mechanisms and professional electromagnetic simulation software. The simulation results demonstrate that the FRM can achieve tri-modal regulation for different polarized electromagnetic waves by adjusting the resistors and PIN diodes. Specifically, it exhibits: the absorption mode is obtained in the 5.92-10.89 GHz range, the transmission mode is achieved in the 7.63-9.22 GHz range, and the reflection mode is realized in the 2.00-9.80 GHz range. Consequently, the designed FRM can be applied in complex military electromagnetic environments.