Near-Field Antenna Arrays for Steerable Sub-Wavelength Magnetic-Field Beams

被引：15

作者：

Ludwig, Alon ^{[1
]}

Sarris, Costas D. ^{[1
]}

Eleftheriades, George V. ^{[1
]}

机构：

[1] Univ Toronto, Dept Elect & Comp Engn, Toronto, ON M5S 2E4, Canada

来源：

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION | 2014年 / 62卷 / 07期

关键词：

Beam steering; electromagnetic coupling; equivalent circuits; focusing; loop antenna arrays; near fields;

D O I：

10.1109/TAP.2014.2316297

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：

A two-dimensional array of resonant capacitively loaded loops for magnetic near-field focusing is presented. The array is designed to produce a narrow magnetic-field beam in the near-field with a reduced residual surrounding electric field. It is shown that the array allows subwavelength beam steering and shaping. The array operation is discussed and explained in detail using a simplified circuit model. The observations made based on the model are then utilized to devise an optimization procedure aimed at fine-tuning the array so as to eliminate the need in multiple excitation sources and maximize the achievable magnetic-field beam intensity. The proposed array may prove useful in a variety of applications including the improvement of wireless power transfer devices performance and the creation of efficient external sources for magnetically mediated therapy.

引用

页码：3543 / 3556

页数：14

共 22 条

[1]

COMSOL, 2012, COMSOL MULT V4 3A

[2] Kilohertz magnetic field focusing and force enhancement using a metallic loop array [J].

Dede, Ercan M. ;

Lee, Jaewook ;

Guo, Yuanbo ;

Zhou, Li Qin ;

Zhang, Minjuan ;

Banerjee, Debasish .

APPLIED PHYSICS LETTERS, 2012, 101 (02)

[3]

Dionigi M, 2013, 2013 IEEE WIRELESS POWER TRANSFER (WPT), P17

[4] Sub-diffraction-limited optical imaging with a silver superlens [J].

Fang, N ;

Lee, H ;

Sun, C ;

Zhang, X .

SCIENCE, 2005, 308 (5721) :534-537

[5] Proposal for Superfocusing at Visible Wavelengths Using Radiationless Interference of a Plasmonic Array [J].

Gordon, R. .

PHYSICAL REVIEW LETTERS, 2009, 102 (20)

[6] Near-field plates: Subdiffraction focusing with patterned surfaces [J].

Grbic, Anthony ;

Jiang, Lei ;

Merlin, Roberto .

SCIENCE, 2008, 320 (5875) :511-513

[7] Near-Field Plates: Metamaterial Surfaces/Arrays for Subwavelength Focusing and Probing [J].

Grbic, Anthony ;

Merlin, Roberto ;

Thomas, Erin M. ;

Imani, Mohammadreza F. .

PROCEEDINGS OF THE IEEE, 2011, 99 (10) :1806-1815

[8] Rational approximation of frequency domain responses by vector fitting [J].

Gustavsen, B ;

Semlyen, A .

IEEE TRANSACTIONS ON POWER DELIVERY, 1999, 14 (03) :1052-1061

[9]

Holm P., 2007, P IEEE MILCOM, P1

[10] Magnetic superlens-enhanced inductive coupling for wireless power transfer [J].

Huang, Da ;

Urzhumov, Yaroslav ;

Smith, David R. ;

Teo, Koon Hoo ;

Zhang, Jinyun .

JOURNAL OF APPLIED PHYSICS, 2012, 111 (06)

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