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

被引：4

作者：

Chen, X. L. ^{[1
]}

Chavannes, N. ^{[1
]}

Ng, G. H. ^{[2
]}

Tay, Y. S. ^{[2
]}

Mosig, J. ^{[3
]}

机构：

[1] SPEAG, CH-8004 Zurich, Switzerland

[2] AAC Technol Pte Ltd, Singapore 569059, Singapore

[3] Swiss Fed Inst Technol EPFL, CH-1015 Lausanne, Switzerland

来源：

IEEE ANTENNAS AND PROPAGATION MAGAZINE | 2015年 / 57卷 / 01期

关键词：

Antenna; cross-frequency component integration; moving coil; mutual coupling; radiation loss; speaker; INVERTED-F ANTENNA; PHONE ANTENNA; MONOPOLE;

D O I：

10.1109/MAP.2015.2397159

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

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.

引用

页码：97 / 109

页数：13

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