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arXiv · 2305.01416

Trade-off Between Optimal Efficiency and Envelope Correlation Coefficient for Antenna Clusters

Vojtech Neuman·Miloslav Capek·Lukas Jelinek·Anu Lehtovuori·Ville Viikari
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Abstract

This paper introduces a theory for assessing and optimizing the multiple-input-multiple-output performance of multi-port cluster antennas in terms of efficiency, channel correlation, and power distribution. A method based on a convex optimization of feeding coefficients is extended with additional constraints allowing the user to control a ratio between the power radiated by the clusters. The formulation of the problem makes it possible to simultaneously optimize total efficiency and channel correlation with a fixed ratio between power radiated by the clusters, thus examining a trade-off between these parameters. It is shown that channel correlation, total efficiency, and allocation of radiated power are mutually conflicting parameters. The trade-offs are shown and discussed. The theory is demonstrated on a four-element antenna array and on a mobile terminal antenna.

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Vojtech Neuman, Miloslav Capek, Lukas Jelinek, Anu Lehtovuori, Ville Viikari. 2023-05-02. Trade-off Between Optimal Efficiency and Envelope Correlation Coefficient for Antenna Clusters. https://doi.org/10.1109/tap.2023.3342939

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