A Smart Cage With Uniform Wireless Power Distribution in 3D for Enabling Long-Term Experiments With Freely Moving Animals

Publication Type:

Journal Article


IEEE Transactions on Biomedical Circuits and SystemsIEEE Transactions on Biomedical Circuits and Systems, Volume 10, Issue 2, p.424 - 434 (2016)




3D uniform wireless power distribution, Animals, biological techniques, Coils, Electric Power Supplies, Equipment Design, freely moving animals, inductive power transmission, Locomotion, long term biomedical experiments, Long-term in-vivo experiments, multicoil inductive link, multicoil inductive links, parallel resonators, power delivery to the load, Power distribution, power harvesting, power localization, power transfer efficiency, Power transmission, power transmission chamber prototype, prototypes, Receivers, resonators, smart cage, Software, Three-dimensional displays, Transmitters, uniform power distribution in 3D, Wireless communication, wireless power transmission, Wireless Technology


<p>This paper presents a novel experimental chamber with uniform wireless power distribution in 3D for enabling long-term biomedical experiments with small freely moving animal subjects. The implemented power transmission chamber prototype is based on arrays of parallel resonators and multicoil inductive links, to form a novel and highly efficient wireless power transmission system. The power transmitter unit includes several identical resonators enclosed in a scalable array of overlapping square coils which are connected in parallel to provide uniform power distribution along x and y. Moreover, the proposed chamber uses two arrays of primary resonators, facing each other, and connected in parallel to achieve uniform power distribution along the z axis. Each surface includes 9 overlapped coils connected in parallel and implemented into two layers of FR4 printed circuit board. The chamber features a natural power localization mechanism, which simplifies its implementation and ease its operation by avoiding the need for active detection and control mechanisms. A single power surface based on the proposed approach can provide a power transfer efficiency (PTE) of 69% and a power delivered to the load (PDL) of 120 mW, for a separation distance of 4 cm, whereas the complete chamber prototype provides a uniform PTE of 59% and a PDL of 100 mW in 3D, everywhere inside the chamber with a size of 27×27×16 cm<sup>3</sup>.</p>

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