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Fundamental bounds on MIMO antennas. (arXiv:1704.06600v1 [physics.class-ph])
来源于:arXiv
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 maximal gain over Q-factor ratio. The performance of MIMO antennas is more
involved and a single parameter is, in general, 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 bound is illustrated by solving the optimization
problem numerically for a rectangular plate. 查看全文>>