Theoretical proposal for the experimental realisation of a monochromatic electromagnetic knot
| Autor: | Robert P. Cameron, Wolfgang Löffler, Karl D. Stephan |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Electromagnetic field
FOS: Physical sciences 02 engineering and technology Physics - Classical Physics 020210 optoelectronics & photonics Knot (unit) Optics 0202 electrical engineering electronic engineering information engineering QC Physics business.industry Classical Physics (physics.class-ph) Radius Mathematics::Geometric Topology Atomic and Molecular Physics and Optics Physics - Plasma Physics Electronic Optical and Magnetic Materials Magnetic field Plasma Physics (physics.plasm-ph) Dipole Monochromatic color Antenna (radio) business Microwave Optics (physics.optics) Physics - Optics |
| Zdroj: | Journal of Optics, 23(6) |
| ISSN: | 0972-8821 |
| Popis: | 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 Ra\~nada-Hopf type electromagnetic knots but simpler in its construction. The antenna could be used to locally excite plasmas. Comment: 6 pages, published version |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink