Theoretical proposal for the experimental realisation of a monochromatic electromagnetic knot
Date
2021-05
Authors
Cameron, R. P.
Loffler, W.
Stephan, Karl D.
Journal Title
Journal ISSN
Volume Title
Publisher
IOP Science
Abstract
We propose an antenna designed to generate monochromatic electromagnetic knots and other 'unusual electromagnetic disturbances' in the microwave domain. Our antenna is a spherical array of radiating dipolar elements configured to approximate the desired electromagnetic field near its centre. We show numerically that a specific embodiment of the antenna with a radius of 61.2 cm and only 20 element pairs driven at a frequency of 2.45 GHz can yield linked and torus-knotted electric and magnetic field lines approximating those of an 'electromagnetic tangle': a monochromatic electromagnetic knot closely related to the well-known Rañada–Hopf type electromagnetic knots but simpler in its construction. The antenna could be used to locally excite plasmas.
Description
Keywords
electromagnetic knots, microwaves, antenna theory, Ingram School of Engineering
Citation
Cameron, R. P., Löffler, W., & Stephan, K. D. (2021). Theoretical proposal for the experimental realisation of a monochromatic electromagnetic knot. Journal of Optics, 23, 06.
Rights
Rights Holder
© 2021 The Author(s).
Rights License
This work is licensed under a Creative Commons Attribution 4.0 International License.