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Evaluation of RF Wireless Power Transfer for Low-Power Aircraft Sensors

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Document pages: 6 pages

Abstract: Low-power sensors can be integrated into an aircraft for numerous use cases.Conventionally, these sensors are powered via cables, which introduces variousdisadvantages to the overall efficiency of the aircraft. Alternatively,batteries may be used. However, this implies the necessity of additionalmaintenance for battery replacement. Another option to remove power cables isto use Radio Frequency (RF) Wireless Power Transfer (WPT) systems. Althoughgeneral RF WPT technology has been studied in the literature, its feasibilityfor aviation use cases is not fully investigated. In this paper, we study thefeasibility of RF WPT to wirelessly power low-power in-cabin sensors. In acabin mock-up we show that RF WPT techonology is capable of almost fullycovering an area of 20 seats and quantitatively assess this using ReceivedSignal Strength Indicators (up to $28$ mW) and packet interval rate (up to$5.5$ Hz). Furthermore, we perform multi-tone sinusoidal wave experiments forpower transmission scheme in a lab environment and thereby present potentialways to improve receiver sensitivity and consequently increase the WPT coveragein the cabin without changing the average transmission power. The overallresults show that certain low-power cabin use cases can be supported by alreadyexisting commercial RF WPT systems.

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