access icon free In-the-ear spiral monopole antenna for hearing instruments

© The Institution of Engineering and Technology
Received 06/08/2014, Published 02/10/2014
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A novel in-the-ear (ITE) antenna solution for hearing instruments that operates at 2.45 GHz is presented. The antenna consists of a quarter wave monopole and a ground plane that are placed in the ear. The simulated path gain |S 21| is −86 dB and the measured path gain is −80 dB. Simulations and measurements show that the antenna covers the entire 2.40–2.48 GHz industrial, scientific and medical (ISM) band. It is the first ever ITE-antenna solution that demonstrates the possibility of establishing an ear-to-ear link by using a standard Bluetooth chip.

Inspec keywords: hearing; body sensor networks; monopole antennas; Bluetooth; biomedical communication; spiral antennas; hearing aids

Other keywords: frequency 2.40 GHz to 2.48 GHz; hearing instruments; ITE antenna; ear-to-ear link; industrial band; medical band; ground plane; scientific band; Bluetooth chip; ISM band; simulated path gain; in-the-ear spiral monopole antenna; quarter wave monopole

Subjects: Prosthetics and other practical applications; Audition; Sensing devices and transducers; Antennas; Auditory prostheses and hearing aids; Radio links and equipment; Wireless sensor networks; Single antennas; Prosthetics and orthotics; Biomedical communication

References

    1. 1)
      • 3. Huitema, L., Sufyar, S., Delaveaud, C., D'Errico, R.: ‘Miniature antenna effect on the ear-to-ear radio channel characteristics’. 6th European Conf. on Antennas and Propagation, Prague, Czech Republic, March 2012, pp. 3402–3406.
    2. 2)
      • 1. Kvist, S.H., Özden, S., Thaysen, J., Jakobsen, K.B.: ‘Improvement of the ear-to-ear path gain at 2.45 GHz using parasitic antenna element’. 6th European Conf. on Antennas and Propagation (EuCAP), Prague, Czech Republic, March 2012, pp. 944–947.
    3. 3)
      • 2. Chandra, R., Johansson, A.J.: ‘Miniaturized antennas for link between binaural hearing aids’. Proc. 32nd Annual Int. Conf. of the IEEE Engineering in Medicine and Biology Society, Buenos Aires, Argentina, September 2010, pp. 688–691.
    4. 4)
      • 5. Pehrson, S., Kvist, S.H., Thaysen, J., Jakobsen, K.B.: ‘Morphological investigation of the differences on the ear-to-ear path gain and the packet loss at 2.45 GHz’. 34th Annual Antenna Measurement Techniques Association Symp. (AMTA 2012), Seattle, WA, USA, October 2012, pp. 38–42.
    5. 5)
http://iet.metastore.ingenta.com/content/journals/10.1049/el.2014.2874
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Correspondence
This article has following corresponding article(s):
play it by ear