Efficient electrically small antenna facilitated by a near-field resonant parasitic

Richard W. Ziolkowski

doi:10.1109/LAWP.2008.2000558

Efficient electrically small antenna facilitated by a near-field resonant parasitic

Richard W. Ziolkowski

Electrical and Computer Engineering

Research output: Contribution to journal › Article › peer-review

27 Scopus citations

Abstract

An electrically small electric-based metamaterial-inspired antenna system that is designed for narrow bandwidth operation near 300 MHz is presented. It consists of a lumped element-based resonant parasitic element that is introduced into the very near field of a coax-fed monopole. It is demonstrated that several idealized lossless versions are capable of achieving a near perfect impedance match to the source and, thus, have overall efficiencies near 100% without an external matching circuit. It is established that the entire system makes effective use of the radiansphere volume it occupies. The overall efficiencies are shown to remain high even when conductor losses are introduced. Potential frequency agility is also demonstrated.

Original language	English (US)
Article number	2000558
Pages (from-to)	581-584
Number of pages	4
Journal	IEEE Antennas and Wireless Propagation Letters
Volume	7
DOIs	https://doi.org/10.1109/LAWP.2008.2000558
State	Published - 2008

Keywords

Antenna efficiency
Antenna theory
Electrically small antennas
Metamaterlals
Parasitic antennas
Q factor

ASJC Scopus subject areas

Electrical and Electronic Engineering

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10.1109/LAWP.2008.2000558

Cite this

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title = "Efficient electrically small antenna facilitated by a near-field resonant parasitic",

abstract = "An electrically small electric-based metamaterial-inspired antenna system that is designed for narrow bandwidth operation near 300 MHz is presented. It consists of a lumped element-based resonant parasitic element that is introduced into the very near field of a coax-fed monopole. It is demonstrated that several idealized lossless versions are capable of achieving a near perfect impedance match to the source and, thus, have overall efficiencies near 100% without an external matching circuit. It is established that the entire system makes effective use of the radiansphere volume it occupies. The overall efficiencies are shown to remain high even when conductor losses are introduced. Potential frequency agility is also demonstrated.",

keywords = "Antenna efficiency, Antenna theory, Electrically small antennas, Metamaterlals, Parasitic antennas, Q factor",

author = "Ziolkowski, {Richard W.}",

note = "Funding Information: Manuscript received March 24, 2008; revised April 25, 2008. First published May 16, 2008; current version published December 30, 2008 This work was supported in part by DARPA under Contract HR0011-05-C-0068. The author is with the Department of Electrical and Computer Engineering, University of Arizona, Tucson, AZ 85721-0104 USA (e-mail: ziolkowski@ece. arizona.edu). Color versions of one or more of the figures in this letter are available online at http://ieeexplore.ieee.org. Digital Object Identifier 10.1109/LAWP.2008.2000558",

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AU - Ziolkowski, Richard W.

N1 - Funding Information: Manuscript received March 24, 2008; revised April 25, 2008. First published May 16, 2008; current version published December 30, 2008 This work was supported in part by DARPA under Contract HR0011-05-C-0068. The author is with the Department of Electrical and Computer Engineering, University of Arizona, Tucson, AZ 85721-0104 USA (e-mail: ziolkowski@ece. arizona.edu). Color versions of one or more of the figures in this letter are available online at http://ieeexplore.ieee.org. Digital Object Identifier 10.1109/LAWP.2008.2000558

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N2 - An electrically small electric-based metamaterial-inspired antenna system that is designed for narrow bandwidth operation near 300 MHz is presented. It consists of a lumped element-based resonant parasitic element that is introduced into the very near field of a coax-fed monopole. It is demonstrated that several idealized lossless versions are capable of achieving a near perfect impedance match to the source and, thus, have overall efficiencies near 100% without an external matching circuit. It is established that the entire system makes effective use of the radiansphere volume it occupies. The overall efficiencies are shown to remain high even when conductor losses are introduced. Potential frequency agility is also demonstrated.

AB - An electrically small electric-based metamaterial-inspired antenna system that is designed for narrow bandwidth operation near 300 MHz is presented. It consists of a lumped element-based resonant parasitic element that is introduced into the very near field of a coax-fed monopole. It is demonstrated that several idealized lossless versions are capable of achieving a near perfect impedance match to the source and, thus, have overall efficiencies near 100% without an external matching circuit. It is established that the entire system makes effective use of the radiansphere volume it occupies. The overall efficiencies are shown to remain high even when conductor losses are introduced. Potential frequency agility is also demonstrated.

KW - Antenna efficiency

KW - Antenna theory

KW - Electrically small antennas

KW - Metamaterlals

KW - Parasitic antennas

KW - Q factor

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Efficient electrically small antenna facilitated by a near-field resonant parasitic

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Keywords

ASJC Scopus subject areas

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