TY - GEN
T1 - Multi-objective tradeoff studies of directivity achievable by electrically small nanoloops
AU - Nagar, Jogender
AU - Campbell, Sawyer D.
AU - Wemer, Pingjuan L.
AU - Werner, Douglas H.
N1 - Publisher Copyright:
© 2017 URSI.
PY - 2017/11/10
Y1 - 2017/11/10
N2 - Electrically small antennas typically suffer from a low radiation resistance, efficiency and bandwidth. In particular, achieving a high directivity (often called superdirectivity) from these structures is especially challenging, often requiring arrays which are extremely sensitive to mechanical and electrical tolerancing. Nonetheless, it was recently discovered that superdirectivity could be achieved by an electrically small gold nanoloop. Unfortunately, the initial design suffered from poor efficiency. A thicker nanoloop exhibits higher efficiency at the expense of a shift in the frequency range of high directivity to a region where the loop is no longer electrically small. This paper will explicitly show the tradeoffs between size, directivity and gain for nanoloops through a series of multi-objective optimizations.
AB - Electrically small antennas typically suffer from a low radiation resistance, efficiency and bandwidth. In particular, achieving a high directivity (often called superdirectivity) from these structures is especially challenging, often requiring arrays which are extremely sensitive to mechanical and electrical tolerancing. Nonetheless, it was recently discovered that superdirectivity could be achieved by an electrically small gold nanoloop. Unfortunately, the initial design suffered from poor efficiency. A thicker nanoloop exhibits higher efficiency at the expense of a shift in the frequency range of high directivity to a region where the loop is no longer electrically small. This paper will explicitly show the tradeoffs between size, directivity and gain for nanoloops through a series of multi-objective optimizations.
UR - http://www.scopus.com/inward/record.url?scp=85046116687&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85046116687&partnerID=8YFLogxK
U2 - 10.23919/URSIGASS.2017.8105379
DO - 10.23919/URSIGASS.2017.8105379
M3 - Conference contribution
AN - SCOPUS:85046116687
T3 - 2017 32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017
SP - 1
EP - 4
BT - 2017 32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 32nd General Assembly and Scientific Symposium of the International Union of Radio Science, URSI GASS 2017
Y2 - 19 August 2017 through 26 August 2017
ER -