Title :
In-the-ear spiral monopole antenna for hearing instruments
Author :
Kammersgaard, Nikolaj P. I. ; Kvist, Soren H. ; Thaysen, Jesper ; Jakobsen, Kaj B.
Author_Institution :
Tech. Univ. of Denmark, Lyngby, Denmark
Abstract :
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 |S21| 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.
Keywords :
Bluetooth; biomedical communication; body sensor networks; hearing; hearing aids; monopole antennas; spiral antennas; Bluetooth chip; ISM band; ITE antenna; ear-to-ear link; frequency 2.40 GHz to 2.48 GHz; ground plane; hearing instruments; in-the-ear spiral monopole antenna; industrial band; medical band; quarter wave monopole; scientific band; simulated path gain;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2014.2874
