In-the-Ear Circular-Shaped Balanced Inverted-A Antenna for Hearing Instruments

A novel in-the-ear antenna for hearing instruments that operates at 2.45 GHz is presented. The antenna is designed to obtain a polarization perpendicular to the surface of the head in order to optimize the ear-to-ear communication. The antenna consists of a bent dipole with a shorting pin used for i...

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Veröffentlicht in:	IEEE antennas and wireless propagation letters 2016, Vol.15, p.1839-1843
Hauptverfasser:	Kammersgaard, Nikolaj P. B., Kvist, Sren H., Thaysen, Jesper, Jakobsen, Kaj B.
Format:	Artikel
Sprache:	eng
Schlagworte:	Antenna measurements Antenna radiation patterns Creeping waves Dipole antennas Ear ear-to-ear (E2E) Gain Hearing aids hearing instrument (HI) Impedance matching in-the-ear (ITE) on-body path gain Polarization wireless body area networks Wireless communication
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Beschreibung
Zusammenfassung:	A novel in-the-ear antenna for hearing instruments that operates at 2.45 GHz is presented. The antenna is designed to obtain a polarization perpendicular to the surface of the head in order to optimize the ear-to-ear communication. The antenna consists of a bent dipole with a shorting pin used for impedance matching. It is self-resonant and well matched in the entire Industrial, Scientific, and Medical band from 2.40 to 2.48 GHz. The simulated and measured peak ear-to-ear path gain \|S 21 \| is -74.5 and -72.9 dB, respectively. The radiation pattern of the antenna is analyzed, and the implications of the radiation pattern on the ear-to-ear communication are discussed.
ISSN:	1536-1225 1548-5757
DOI:	10.1109/LAWP.2016.2538966