McKinley, AF;
Nagar, J;
Werner, D;
(2018)
Far-Field Radiation Properties of Impedance-Loaded Loop Antennas from RF to Optical Frequencies.
In: Hao, Yang and Brown, Tony, (eds.)
Proceedings of the 12th European Conference on Antennas and Propagation.
EuCap: London, UK.
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Abstract
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.
| Type: | Proceedings paper |
|---|---|
| Title: | Far-Field Radiation Properties of Impedance-Loaded Loop Antennas from RF to Optical Frequencies |
| Event: | EuCAP 2018, 9-13 April 2018, |
| Location: | London, England, UK |
| Dates: | 09 April 2018 - 13 April 2018 |
| Open access status: | An open access version is available from UCL Discovery |
| Publisher version: | http://www.eucap2018.org/conference/programme |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | antennas, nano-antennas, adaptive and reconfigurable antennas, metamaterials |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10040566 |
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