2017/04/13 by Casimir Ehrenborg, Mats Gustafsson, Ehrenborg, Casimir +1 · 1 citation
Engineering · #Antenna Design and Analysis #Antenna Design and Optimization #Applied Physics (physics.app-ph) #Classical Physics (physics.class-ph) #Energy Harvesting in Wireless Networks #FOS: Mathematics #FOS: Physical sciences #Optimization and Control (math.OC)
paper · doi:10.48550/arxiv.1704.06600
openalex publication_date 2017/04/13 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Antenna current optimization is often used to analyze the optimal performance of antennas. Antenna performance can be quantified in e.g., minimum Q-factor and efficiency. The performance of MIMO antennas is more involved and, in general, a single parameter is not sufficient to quantify it. Here, the capacity of an idealized channel is used as the main performance quantity. An optimization problem in the current distribution for optimal capacity, measured in spectral efficiency, given a fixed Q-factor and efficiency is formulated as a semi-definite optimization problem. A model order reduction based on characteristic and energy modes is employed to improve the computational efficiency. The performance bound is illustrated by solving the optimization problem numerically for rectangular plates and spherical shells.