Decoupling Sensor Network Design Method for High-Density RFID Tag Arrays in Fiber-Pairing Management

In high-density deployments of passive radio frequency identification (RFID) tags for Internet of Things (IoT) applications, strong antenna mutual coupling severely degrades radio frequency energy harvesting (RFEH) and wireless communication reliability. This article presents a novel strategy to overcome this challenge by characterizing the coupling-induced impedance mismatch using an integrated electromagnetic (EM) and equivalent circuit analysis to design a compact decoupling fiber-pairing management network. Large-scale statistical experiments demonstrate that our approach reduces bulk inventory time by up to 38% in high-density, 288-tag deployments. Furthermore, it enables a critical advancement: reliable, low-power wired communication between passive tag pairs with a bit error rate (BER) below 10^-3. This work provides a practical and effective solution for deploying robust and self-sustaining passive IoT systems in high-density environments, solving critical limitations in energy harvesting and communication stability.