| Abstract |
Electromagnetic waves emitted by a transmitter in practical scenarios are often degraded by obstacles along the transmission path, polarization mismatch, and distance to the receiver, which significantly limits the quality of wireless communication. To overcome these challenges, this study proposes an amplifier-based programmable metasurface designed to enhance the bidirectional propagation of various polarized incident electromagnetic waves. The metasurface consists of patch scatters, reconfigurable phase shifters, and negative resistors. The incident wave is decomposed into two orthogonally polarized components by the patch scatterers, and the direction of the scattered waves can be manipulated by adjusting the reconfigurable phase shifters. A Class-E reflection amplifier, serving as the embedded negative resistor, amplifies both uplink and downlink signals with ultralow power consumption. This proposed amplifier-based programmable metasurface offers a promising solution to enhance wireless communication with minimal power consumption, representing significant potential for next-generation wireless communication systems, the Internet of Things, low-altitude economy, and smart cities. © 2025 The Author(s). Small Structures published by Wiley-VCH GmbH. |
