Efficient Evaluation of Epithelial/Absorbed Power Density by Multiantenna User Equipment With SAM Head Model

• Published in: IEEE antennas and wireless propagation letters Vol. 23; no. 12; pp. 4059 - 4063
• Main Authors: Wu, Tongning, Chen, Yuming, Li, Congsheng
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.12.2024; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Absorbed power density; Algorithms; Antenna arrays; Avalanche photodiodes; Computing time; Density measurement; Mathematical models; Monte Carlo simulation; multiantenna user equipment; Optimization; Parameterization; Particle swarm optimization; particle swarm optimization (PSO); Power system measurements; semidefinite relaxation; Vectors
• ISSN: 1536-1225; 1548-5757
• DOI: 10.1109/LAWP.2024.3421367

This study introduces a joint optimization algorithm that combines semidefinite relaxation (SDR) and particle swarm optimization (PSO) to efficiently estimate the maximized peak spatial-average APD (mpsAPD) by multiantenna user equipment (MAUE). Utilizing SDR, the algorithm computes the weight of the elements within the antenna array and employs PSO to identify the averaging area for maximum exposure. Quasi-conformal parameterization is utilized to facilitate searches along curved phantom profiles. The proposed approach exhibits superior efficiency and accuracy in calculating the mpsAPD by MAUE, revealing a negligible discrepancy of less than 3% relative to 10 000 times Monte Carlo simulations and reducing 97.5% of computational time. These findings provide substantial significance for the current discussion on international standardization concerning the assessment of APD.