Electrically small superdirective endfire arrays of metamaterial-inspired low-profile monopoles

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Electrically small superdirective endfire arrays of metamaterial-inspired low-profile monopoles. / Kokkinos, T.; Feresidis, A.P.

In: IEEE Antennas and Wireless Propagation Letters, Vol. 11, 15.05.2012, p. 568-571.

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@article{3281156505774135b1ca9c3761e85f61,
title = "Electrically small superdirective endfire arrays of metamaterial-inspired low-profile monopoles",
abstract = "This letter presents the design and experimental characterization of subwavelength, superdirective, endfire antenna arrays operating in the 2.45-GHz band. Microstrip-fed, low-profile folded monopoles are designed using metamaterial-inspired phase-shifting lines composed of inductively coupled spiral resonators and employed for the synthesis of three different superdirective, two-element antenna arrays with variable interelement spacing. High directivity values are obtained experimentally. The experimental results show that the radiation efficiency of the reported arrays decreases as the interelement spacing of the arrays is reduced. Nevertheless, the directivity increase that is achieved with the interelement spacing reduction compensates the efficiency reduction, enabling even the more compact arrays to deliver reasonable gain values.",
author = "T. Kokkinos and A.P. Feresidis",
note = "Copyright 2012 Elsevier B.V., All rights reserved.",
year = "2012",
month = may,
day = "15",
doi = "10.1109/LAWP.2012.2199460",
language = "English",
volume = "11",
pages = "568--571",
journal = "IEEE Antennas and Wireless Propagation Letters",
issn = "1536-1225",
publisher = "IEEE Xplore",

}

RIS

TY - JOUR

T1 - Electrically small superdirective endfire arrays of metamaterial-inspired low-profile monopoles

AU - Kokkinos, T.

AU - Feresidis, A.P.

N1 - Copyright 2012 Elsevier B.V., All rights reserved.

PY - 2012/5/15

Y1 - 2012/5/15

N2 - This letter presents the design and experimental characterization of subwavelength, superdirective, endfire antenna arrays operating in the 2.45-GHz band. Microstrip-fed, low-profile folded monopoles are designed using metamaterial-inspired phase-shifting lines composed of inductively coupled spiral resonators and employed for the synthesis of three different superdirective, two-element antenna arrays with variable interelement spacing. High directivity values are obtained experimentally. The experimental results show that the radiation efficiency of the reported arrays decreases as the interelement spacing of the arrays is reduced. Nevertheless, the directivity increase that is achieved with the interelement spacing reduction compensates the efficiency reduction, enabling even the more compact arrays to deliver reasonable gain values.

AB - This letter presents the design and experimental characterization of subwavelength, superdirective, endfire antenna arrays operating in the 2.45-GHz band. Microstrip-fed, low-profile folded monopoles are designed using metamaterial-inspired phase-shifting lines composed of inductively coupled spiral resonators and employed for the synthesis of three different superdirective, two-element antenna arrays with variable interelement spacing. High directivity values are obtained experimentally. The experimental results show that the radiation efficiency of the reported arrays decreases as the interelement spacing of the arrays is reduced. Nevertheless, the directivity increase that is achieved with the interelement spacing reduction compensates the efficiency reduction, enabling even the more compact arrays to deliver reasonable gain values.

UR - http://www.scopus.com/inward/record.url?partnerID=yv4JPVwI&eid=2-s2.0-84861924007&md5=ded6f85648f0df41081a57111ad4bde5

U2 - 10.1109/LAWP.2012.2199460

DO - 10.1109/LAWP.2012.2199460

M3 - Article

AN - SCOPUS:84861924007

VL - 11

SP - 568

EP - 571

JO - IEEE Antennas and Wireless Propagation Letters

JF - IEEE Antennas and Wireless Propagation Letters

SN - 1536-1225

ER -