Body-Worn Spiral Monopole Antenna for On-Body Communications

A novel body-worn spiral monopole antenna is presented. The antenna consists of a ground plane and a spiral monopole. The antenna was designed for Ear-to-Ear (E2E) communication between In-the-Ear (ITE) hearing instruments at 2.45 GHz and has been simulated, prototyped, and measured. The antenna yielded a measured and simulated E2E path gain at 2.45 GHz of ?82.1 dB and ?85.9 dB, respectively. The radiation pattern of the antenna when mounted in the ear is presented and discussed.

[1]  R. W. Lau,et al.  The dielectric properties of biological tissues: III. Parametric models for the dielectric spectrum of tissues. , 1996, Physics in medicine and biology.

[2]  Jesper Thaysen,et al.  Polarization of unbalanced antennas for ear-to-ear on-body communications at 2.45 GHz , 2011, 2011 Loughborough Antennas & Propagation Conference.

[3]  L. Huitema,et al.  Miniature antenna effect on the ear-to-ear radio channel characteristics , 2012, 2012 6th European Conference on Antennas and Propagation (EUCAP).

[4]  Kaj Bjarne Jakobsen,et al.  In-the-ear spiral monopole antenna for hearing instruments , 2014 .

[5]  Julien Ryckaert,et al.  Channel model for wireless communication around human body , 2004 .

[6]  Jesper Thaysen,et al.  Body-worn spiral monopole antenna for body-centric communications , 2015, 2015 International Workshop on Antenna Technology (iWAT).

[7]  J. Thaysen,et al.  Improvement of the ear-to-ear path gain at 2.45 GHz using parasitic antenna element , 2012, 2012 6th European Conference on Antennas and Propagation (EUCAP).

[8]  C. Parini,et al.  Antennas and propagation for on-body communication systems , 2007, IEEE Antennas and Propagation Magazine.

[9]  Anders J. Johansson,et al.  A Link Loss Model for the On-Body Propagation Channel for Binaural Hearing Aids , 2013, IEEE Transactions on Antennas and Propagation.

[10]  R. Chandra,et al.  Miniaturized antennas for link between binaural hearing aids , 2010, 2010 Annual International Conference of the IEEE Engineering in Medicine and Biology.

[11]  Jesper Thaysen,et al.  Pinna model for hearing instrument applications , 2014, 2014 Loughborough Antennas and Propagation Conference (LAPC).