TY - GEN
T1 - Far-field radiation properties of impedance-loaded loop antennas from RF to optical frequencies
AU - Nagar, Jogender
AU - McKinley, Arnold F.
AU - Werner, Douglas H.
N1 - Funding Information:
Partial support for this work was provided by the Center for Nanoscale Science, an NSF Materials Research Science and Engineering Center, under the award DMR-1420620.
Publisher Copyright:
© Institution of Engineering and Technology.All Rights Reserved.
PY - 2018
Y1 - 2018
N2 - Impedance loading of antennas has been of interest for more than half a century due to its ability to fundamentally change an antenna's operating characteristics. Variable reactive loading can be employed for configurability of the frequency response, polarization and far-field properties of an antenna. Closed-form expressions for the current and input impedance of a thin-wire loop antenna with loads in the periphery were derived in the RF and optical regimes in 1965 and 2017, respectively. Meanwhile, closed-form far-field radiation properties of circular loop antennas in the RF and optical regimes were derived in 1996 and 2017. This paper extends this theory to provide closed-form analytical expressions for the far-field radiation properties of impedance-loaded loop antennas valid from the RF to the optical regimes. The expressions are validated by comparison with commercial simulation tools. In addition, a beam steering example is presented as a potential application of the theory.
AB - Impedance loading of antennas has been of interest for more than half a century due to its ability to fundamentally change an antenna's operating characteristics. Variable reactive loading can be employed for configurability of the frequency response, polarization and far-field properties of an antenna. Closed-form expressions for the current and input impedance of a thin-wire loop antenna with loads in the periphery were derived in the RF and optical regimes in 1965 and 2017, respectively. Meanwhile, closed-form far-field radiation properties of circular loop antennas in the RF and optical regimes were derived in 1996 and 2017. This paper extends this theory to provide closed-form analytical expressions for the far-field radiation properties of impedance-loaded loop antennas valid from the RF to the optical regimes. The expressions are validated by comparison with commercial simulation tools. In addition, a beam steering example is presented as a potential application of the theory.
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U2 - 10.1049/cp.2018.1114
DO - 10.1049/cp.2018.1114
M3 - Conference contribution
AN - SCOPUS:85057310975
SN - 9781785617911
T3 - IET Conference Publications
BT - IET Conference Publications
PB - Institution of Engineering and Technology
T2 - 12th European Conference on Antennas and Propagation, EuCAP 2018
Y2 - 9 April 2018 through 13 April 2018
ER -