Optimal Antenna Placement for Two-Antenna Near-Field Wireless Power Transfer

Mayer K, Cottatellucci L, Schober R (2023)

Publication Language: English

Publication Type: Conference contribution, Conference Contribution

Publication year: 2023

Publisher: Institute of Electrical and Electronics Engineers Inc.

Pages Range: 2135-2140

Conference Proceedings Title: IEEE International Conference on Communications, ICC 2023

Event location: Rom IT

ISBN: 978-1-5386-7462-8

DOI: 10.1109/ICC45041.2023.10278773

Abstract

Current trends in communication system design precipitate a change in the operating regime from the traditional far-field to the radiating near-field (Fresnel) region. We investigate the optimal transmit antenna placement for a multiple-input single-output (MISO) wireless power transfer (WPT) system designed for a three-dimensional cuboid room under line-of-sight (LoS) conditions in the Fresnel region. We formulate an optimisation problem for maximising the received power at the worst possible receiver location by considering the spherical nature of the electromagnetic (EM) wavefronts in the Fresnel region while assuming perfect knowledge of the channel at the transmitter. For the case of two transmit antennas, we derive a closed-form expression for the optimal positioning of the antennas which is purely determined by the geometry of the environment. If the room contains locations where the far-field approximation holds, the proposed positioning is shown to reduce to the far-field solution. The analytical solution is validated through simulation. Furthermore, the maximum received power at the locations yielding the worst performance is quantified and the power gain over the optimal far-field solution is presented. For the considered cuboid environment, we show that a distributed antenna system is optimal in the Fresnel region, whereas a co-located antenna architecture is ideal for the far-field.

Authors with CRIS profile

Kenneth Mayer Lehrstuhl für Digitale Übertragung Laura Cottatellucci Professur für Digitale Übertragung Robert Schober Lehrstuhl für Digitale Übertragung

How to cite

APA:

Mayer, K., Cottatellucci, L., & Schober, R. (2023). Optimal Antenna Placement for Two-Antenna Near-Field Wireless Power Transfer. In IEEE International Conference on Communications, ICC 2023 (pp. 2135-2140). Rom, IT: Institute of Electrical and Electronics Engineers Inc..

MLA:

Mayer, Kenneth, Laura Cottatellucci, and Robert Schober. "Optimal Antenna Placement for Two-Antenna Near-Field Wireless Power Transfer." Proceedings of the 2023 IEEE International Conference on Communications, Rom Institute of Electrical and Electronics Engineers Inc., 2023. 2135-2140.

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