Body-Worn Spiral Monopole Antenna for On-Body Communications

Kammersgaard, Nikolaj P.B.; Kvist, Soren H.; Thaysen, Jesper; Jakobsen, Kaj B.

doi:2015.15.4.213

J. Electromagn. Eng. Sci > Volume 15(4); 2015 > Article

Journal of Electromagnetic Engineering and Science 2015;15(4):213-218.
DOI: https://doi.org/10.5515/JKIEES.2015.15.4.213

Body-Worn Spiral Monopole Antenna for On-Body Communications

Nikolaj P.B. Kammersgaard¹, Soren H. Kvist², Jesper Thaysen², Kaj B. Jakobsen¹

¹Department of Electrical Engineering, Electromagnetic Systems, Technical University of Denmark
²GN ReSound A/S

Abstract

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.

Key words: Body-Centric Communication, Creeping Waves, In-the-Ear Hearing Instruments Antenna, On-Body Path Gain, WBAN