Superdirective Magnetic Dipole Array as a First-Order Probe for Spherical Near-Field Antenna Measurements

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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@article{51bf84b450324573ab88c3831e2840b4,
title = "Superdirective Magnetic Dipole Array as a First-Order Probe for Spherical Near-Field Antenna Measurements",
keywords = "Electrically small antennas,, First-order probe, Magnetic dipole, Spherical near-field antenna measurements, Superdirectivity, Supergain array",
publisher = "I E E E",
author = "Kim, {Oleksiy S.} and Sergey Pivnenko and Olav Breinbjerg",
year = "2012",
doi = "10.1109/TAP.2012.2207363",
volume = "60",
number = "10",
journal = "I E E E Transactions on Antennas and Propagation",
issn = "0018-926X",

}

RIS

TY - JOUR

T1 - Superdirective Magnetic Dipole Array as a First-Order Probe for Spherical Near-Field Antenna Measurements

A1 - Kim,Oleksiy S.

A1 - Pivnenko,Sergey

A1 - Breinbjerg,Olav

AU - Kim,Oleksiy S.

AU - Pivnenko,Sergey

AU - Breinbjerg,Olav

PB - I E E E

PY - 2012

Y1 - 2012

N2 - The theory as well as numerical and experimental results are presented for a superdirective array composed of closely spaced electrically small resonant magnetic dipole elements. The array operates on a metal ground plane and can exhibit a maximum directivity of 11.5 dBi, 15.2 dBi, and 17.8 dBi (including 3 dB due to the ground plane), for 2, 3, and 4 magnetic dipoles, respectively. The array is self-resonant and is directly excited by a 50-ohm coaxial cable through the ground plane. The array radiates essentially the $\vert\mu\vert=1$ spherical modes, which, despite a narrow bandwidth, makes it an excellent first-order probe for spherical near-field antenna measurements at low frequencies.

AB - The theory as well as numerical and experimental results are presented for a superdirective array composed of closely spaced electrically small resonant magnetic dipole elements. The array operates on a metal ground plane and can exhibit a maximum directivity of 11.5 dBi, 15.2 dBi, and 17.8 dBi (including 3 dB due to the ground plane), for 2, 3, and 4 magnetic dipoles, respectively. The array is self-resonant and is directly excited by a 50-ohm coaxial cable through the ground plane. The array radiates essentially the $\vert\mu\vert=1$ spherical modes, which, despite a narrow bandwidth, makes it an excellent first-order probe for spherical near-field antenna measurements at low frequencies.

KW - Electrically small antennas,

KW - First-order probe

KW - Magnetic dipole

KW - Spherical near-field antenna measurements

KW - Superdirectivity

KW - Supergain array

U2 - 10.1109/TAP.2012.2207363

DO - 10.1109/TAP.2012.2207363

JO - I E E E Transactions on Antennas and Propagation

JF - I E E E Transactions on Antennas and Propagation

SN - 0018-926X

IS - 10

VL - 60

ER -