Designs and Performance Characteristics of Coated Nanotoroid Antennas

Sami Ur Rehman; Junping Geng; Richard W. Ziolkowski; Ying Wang; Xianling Liang; Ronghong Jin

doi:10.1155/2015/345137

International Journal of Antennas and Propagation (Jan 2015)

Designs and Performance Characteristics of Coated Nanotoroid Antennas

Sami Ur Rehman,
Junping Geng,
Richard W. Ziolkowski,
Ying Wang,
Xianling Liang,
Ronghong Jin

Affiliations

Sami Ur Rehman: Department of Electronic Engineering, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Shanghai 200240, China
Junping Geng: Department of Electronic Engineering, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Shanghai 200240, China
Richard W. Ziolkowski: Electrical and Computer Engineering Department, University of Arizona, 1230 E. Speedway, Tucson, AZ 85721-0104, USA
Ying Wang: Ministry of Information of the Navy Command, No. 19 West Sanhuan Road, Beijing 100036, China
Xianling Liang: Department of Electronic Engineering, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Shanghai 200240, China
Ronghong Jin: Department of Electronic Engineering, Shanghai Jiao Tong University, No. 800 Dongchuan Road, Shanghai 200240, China

DOI: https://doi.org/10.1155/2015/345137
Journal volume & issue: Vol. 2015

Abstract

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The electromagnetic properties of a toroidal coated nanoparticle (T-CNP) antenna with an active core (doped with rare earth erbium Er3+ ions) are investigated. It is demonstrated that the active T-CNP acts as a strong dipole radiator at its resonance frequency when it is excited by a plane wave or an electric Hertzian dipole (EHD) radiating element. It is shown that in comparison to being a passive structure, the plane wave scattering cross section of the T-CNP can be increased by nearly 108 dBsm at its resonance frequency when it is active. Moreover, it is further demonstrated that the maximum peak of the power radiated by an EHD element in the presence of a properly designed active T-CNP is more than 120 dB over its value when radiating in free space; that is, its Purcell factor is 1012.

Published in International Journal of Antennas and Propagation

ISSN: 1687-5869 (Print); 1687-5877 (Online)
Publisher: Wiley
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering; Social Sciences: Transportation and communications: Cellular telephone services industry. Wireless telephone industry
Website: https://onlinelibrary.wiley.com/journal/8039

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