Power-Dependent Metasurface With Self-Induced Bandgap

• Published in: IEEE antennas and wireless propagation letters Vol. 21; no. 6; pp. 1115 - 1119
• Main Authors: Yang, Xiaozhen, Wen, Erda, Sievenpiper, Daniel F.
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.06.2022; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Circuits; Diodes; Energy gap; high power; Illumination; interference suppression; metasurface; Metasurfaces; Photonic band gap; Power measurement; Prototypes; Radio frequency; Reflection; Schottky diodes; Surface impedance; Surface waves; Topology
• ISSN: 1536-1225; 1548-5757
• DOI: 10.1109/LAWP.2022.3158590

A metallic ring-based, diode-integrated, low-profile, power-dependent metasurface working from 3 to 3.6 GHz is proposed in this letter. Unlike the previous study which shifts a band up and down to change the impedance of the surface, the triggering of the diodes directly transforms the structure from a surface wave supportive state to a self-induced bandgap topology if exposed to high-power radio-frequency (RF) illumination. We demonstrate the concept by conducting the electromagnetic (EM)-circuit co-simulation and measurements for a 6-by-8 unit 2-D prototype. Near-field scan experiments verify that the proposed topology works in two distinct states, the on and off states, and high-power measurements prove that the reflection varies with the incident signal power. The highest 10 dB decrement in transmission occurs at 3.3 GHz with 52 dBm illumination. This structure can be used to protect sensitive devices from large signals while otherwise supporting a communication channel for small signals.