Miniature antenna enabling near-field eye-to-eye communication in the MICS band

Authors:
Christoph Beck;Jörg Nagel;Christian Rusch;Georg Bretthauer
Affiliations:
Karlsruhe Institute of Technology (KIT);Karlsruhe Institute of Technology (KIT);Karlsruhe Institute of Technology (KIT);Karlsruhe Institute of Technology (KIT)
Venue:
BodyNets '13 Proceedings of the 8th International Conference on Body Area Networks
Year:
2013

Citing 2
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Antennas And Propagation for Body-Centric Wireless Communications

Antennas And Propagation for Body-Centric Wireless Communications
Impedance measurement for balanced UHF RFID tag antennas

RWS'10 Proceedings of the 2010 IEEE conference on Radio and wireless symposium

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Abstract

The Artificial Accommodation System (AAS) is a set of two tiny active medical implants meant to replace and imitate the natural eye lenses in case of cataract or presbyopia. The implants require a continuous exchange of sensor data between both eyes to determine the object distance. In this paper we present the design and characterization of a compact, differentially fed, multi-turn loop antenna for a near-field eye-to-eye communication link at 402--405MHz (MICS). The bare antennas have a volume of just 1.1mm3 and exhibit a bandwidth of 5.6%. The efficiency of the link was evaluated by 4-port measurements using a customized head phantom. The measured power transfer efficiency of --60.5 dB suggests the wireless link to be reliable and energy-efficient.