In-the-Ear Spiral Monopole Antenna for Hearing Instruments

Nikolaj Peter Iversen Kammersgaard, Søren Helstrup Kvist, Jesper Thaysen, Kaj Bjarne Jakobsen

Research output: Contribution to journalJournal articleResearchpeer-review


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
Original languageEnglish
JournalElectronics Letters
Issue number21
Pages (from-to)1509 – 1511
Publication statusPublished - 2014


  • Hearing
  • Body sensor networks
  • Monopole antennas
  • Bluetooth
  • Biomedical communication
  • Spiral antennas
  • Hearing aids

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