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  4. Analysis and Design of Mobile Device Antenna-Speaker Integration for Optimum Over-the-Air Performance
 
research article

Analysis and Design of Mobile Device Antenna-Speaker Integration for Optimum Over-the-Air Performance

Chen, X. L.
•
Chavannes, N.
•
Ng, G. H.
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2015
IEEE Antennas and Propagation Magazine

In this paper, the mutual coupling between a mobile device antenna and a closely integrated miniature moving-coil speaker is investigated. The analysis focuses on the speaker radio-frequency harmonic resonance characteristics and the antenna radiation efficiency degradation due to the presence of a speaker. First, antenna structures with simplified speaker models were numerically examined to assess the impacts of speaker harmonic resonance, antenna pattern, speaker location, and coupling mechanisms on antenna radiation performance. Subsequently, highly detailed speaker models based on commercial speaker designs were characterized through simulations and hardware prototyping. The analysis results reveal that the degradation of antenna radiation efficiency is associated with the enhancement of nonradiative energy stored in a conductively or capacitively coupled resonant speaker. Based on the coupling characteristics, practical design guidelines were proposed to achieve cost-effective antenna-speaker coexistence and optimum antenna radiation efficiency even under the most stringent design constraints.

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Type
research article
DOI
10.1109/Map.2015.2397159
Web of Science ID

WOS:000352237400011

Author(s)
Chen, X. L.
•
Chavannes, N.
•
Ng, G. H.
•
Tay, Y. S.
•
Mosig, J.  
Date Issued

2015

Publisher

Institute of Electrical and Electronics Engineers

Published in
IEEE Antennas and Propagation Magazine
Volume

57

Issue

1

Start page

97

End page

109

Subjects

Antenna

•

cross-frequency component integration

•

moving coil

•

mutual coupling

•

radiation loss

•

speaker

Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LEMA  
Available on Infoscience
May 29, 2015
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/114630
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