Open AccessIn‐the‐ear spiral monopole antenna for hearing instruments
Author(s) -
Kammersgaard N.P.I.,
Kvist S.H.,
Thaysen J.,
Jakobsen K.B.
Publication year - 2014
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/el.2014.2874
Subject(s) - monopole antenna , antenna (radio) , spiral antenna , bluetooth , acoustics , dipole antenna , electrical engineering , physics , engineering , telecommunications , coaxial antenna , wireless
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.