Abstract
This paper presents the design and development of miniature coils for wireless power and data transfer through metal. Our coil has a total size of 15 mm × 13 mm × 6 mm. Experimental results demonstrate that we can harvest 440 mW through a 1 mm-thick aluminum plate. Aluminum and stainless-steel barriers of different thicknesses were used to characterize coil performance. Using a pair of the designed coils, we have developed a through-metal communication system to successfully transfer data through a 1 mm-thick aluminum plate. A maximum data rate of 100 bps was achieved using only harvested power. To the best of our knowledge, this is the first report that demonstrates power and data transfer through aluminum using miniature coils.
Highlights
Wireless power and data transfer through metal enables a new set of applications in critical fields such as sensing of temperature and pressure behind sealed metal containers in aircraft fuselages, vehicle armor, and isolated chambers [1,2,3,4]
We present the development of a miniature coil for through metal power and data transfer using inductive coupling
CommunicaThe inside subsystem is made of a harvesting subsystem, Tx subsystem, Rx subsystion is based on amplitude shift keying (ASK) modulation due to its simplicity for wireless tem and microcontroller ATtiny104 Xplained Nano from Microchip Technology
Summary
Wireless power and data transfer through metal enables a new set of applications in critical fields such as sensing of temperature and pressure behind sealed metal containers in aircraft fuselages, vehicle armor, and isolated chambers [1,2,3,4]. The planar circular geometry coils were used in an inductive link to demonstrate 100 mW harvested power through a 1 mm-thick aluminum plate without any data communication. We present the development of a miniature coil for through metal power and data transfer using inductive coupling. We report the measured harvested power and efficiency of the new developed a through-metal communication system where the same pair of coils is used coil for stainless steel and aluminum barriers with different thicknesses. Where the same pair of coils is used for both energy nication subsystem (inside a metal box) only uses harvested power for operation. Communication through aluminumthrough is significant since is a light-weight energy for the inside subsystem a 1 mm aluminum barrier. Communication through aluminum is significant since is a light-weight material
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