Metasurface-Loaded Biodegradable Mobile Phone Back Cover for Enhanced Radiation Performance.

This article introduces a novel biodegradable metasurface-loaded mobile phone back cover designed to reduce electromagnetic exposure and enhance antenna performance. The cover operates across the low GHz band (2-8 GHz) and the millimeter-wave band (22-25.6 GHz), utilizing polylactic acid as an eco-friendly substrate.