Title :
Near-Field Control of Handset Antennas Based on Inverted-Top Wavetraps: Focus on Hearing-Aid Compatibility
Author :
Holopainen, Jari ; Ilvonen, Janne ; Kivekäs, Outi ; Valkonen, Risto ; Icheln, Clemens ; Vainikainen, Pertti
Author_Institution :
Dept. of Radio Sci. & Eng., TKK Helsinki Univ. of Technol., Helsinki, Finland
fDate :
7/1/1905 12:00:00 AM
Abstract :
In this letter, it is shown that inverted-top wavetraps, which are quarter-wavelength-long resonators, can be used to control the near-fields of a mobile terminal antenna. The local reduction of the near-fields is especially important for the operation of the hearing aid of the user. The reshaping of the near-fields may also enable reduced specific absorption rate (SAR) values.
Keywords :
electromagnetic compatibility; handicapped aids; hearing aids; mobile antennas; electromagnetic compatibility; handset antenna; hearing aid; inverted-top wavetrap; mobile terminal antenna; near-field control; quarter-wavelength-long resonator; specific absorption rate; Electromagnetic compatibility (EMC); electromagnetic interference; hearing aids; microstrip antennas; mobile antennas;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2009.2022352
