A 61.3% Efficiency RF Energy-Harvesting System for Battery-Free ESL With 0.31-μW Quiescent Power. - Yen-Yun Huang; Chen-Yu Wen; Jing-Ren Yan; Yao-Wei Huang; Yu-Chi Chen; Zih-Ting Wang; Chi-Wei Liu; Tsung-Ling Li; Wei-Jen Lai; Jen-Hao Liao; Yu-Te Liao; Po-Hung Chen (IEEE Internet Things J., 2026)