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Ultra-Wideband Transceivers for Cochlear Implants

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Author(s): Thomas Buchegger | Gerald O├čberger | Alexander Reisenzahn | Erwin Hochmair | Andreas Stelzer | Andreas Springer

Journal: EURASIP Journal on Advances in Signal Processing
ISSN 1687-6172

Volume: 2005;
Issue: 18;
Start page: 3069;
Date: 2005;
Original page

Keywords: broadband antenna | cochlear implant | detector receiver | step recovery diode | back tunnel diode | ultra-wideband.

ABSTRACT
Ultra-wideband (UWB) radio offers low power consumption, low power spectral density, high immunity against interference, and other benefits, not only for consumer electronics, but also for medical devices. A cochlear implant (CI) is an electronic hearing apparatus, requiring a wireless link through human tissue. In this paper we propose an UWB link for a data rate of 1.2 Mbps and a propagation distance up to 500 mm. Transmitters with step recovery diode and transistor pulse generators are proposed. Two types of antennas and their filter characteristics in the UWB spectrum will be discussed. An ultra-low-power back tunnel diode receiver prototype is described and compared with conventional detector receivers.
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