Far-field radiation properties of impedance-loaded loop antennas from RF to optical frequencies

Jogender Nagar, Arnold F. McKinley, Douglas H. Werner

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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.

Original languageEnglish (US)
Title of host publicationIET Conference Publications
PublisherInstitution of Engineering and Technology
EditionCP741
ISBN (Electronic)9781785618161, 9781785618437, 9781785618468, 9781785618871, 9781785619427, 9781785619694, 9781839530036
ISBN (Print)9781785617911
DOIs
StatePublished - 2018
Event12th European Conference on Antennas and Propagation, EuCAP 2018 - London, United Kingdom
Duration: Apr 9 2018Apr 13 2018

Publication series

NameIET Conference Publications
NumberCP741
Volume2018

Other

Other12th European Conference on Antennas and Propagation, EuCAP 2018
CountryUnited Kingdom
CityLondon
Period4/9/184/13/18

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

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