Boosting the Efficiency

被引：135

作者：

Boaventura, Alirio ^{[1
]}

Belo, Daniel ^{[1
]}

Fernandes, Ricardo ^{[1
]}

Collado, Ana ^{[2
]}

Georgiadis, Apostolos ^{[2
]}

Carvalho, Nuno Borges ^{[1
]}

机构：

[1] Univ Aveiro, Inst Telecomunicaoes, Dept Elect Telecomunicaoes & Informat, P-3800 Aveiro, Portugal

[2] CTTC, Castelldefels, Spain

来源：

IEEE MICROWAVE MAGAZINE | 2015年 / 16卷 / 03期

关键词：

SIGNALS;

D O I：

10.1109/MMM.2014.2388332

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：

Traditionally, wireless power is delivered through single-carrier, continuous-wave (CW) signals. Most research efforts to enhance the efficiency of wireless power transfer systems have been confined to the circuit-level design. However, in recent years, attention has been paid to the waveform design for wireless power transmission. It has been found that signals featuring a high peak-to-average power ratio (PAPR) can provide efficiency improvement when compared with CW signals. A number of approaches have been proposed, such as multisines/multicarrier orthogonal frequency division multiplex (OFDM) signals, chaotic signals, harmonicsignals, ultrawideband (UWB) signals, intermittent CW (ICW) signals, or white-noise signals. This article reviews these techniques with a focus on multisines/multicarrier signals, harmonic signals, and chaotic signals. A theoretical explanation for efficiency improvement is provided and accompanied by experimental results. Circuit design considerations are presented for the receiver side, and efficient transmission architectures are also described with an emphasis on spatial power combining. © 2000-2012 IEEE.

引用

页码：87 / 96

页数：10

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