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Angular momentum of a rotating dipole

In this paper, we derive the far field electromagnetic fields of a rotating half-wave dipole antenna. Theoretically, we have demonstrated that the far electromagnetic fields of a rotating half-wave dipole carry angular momentum in the term of φ-φ′, which is absent from the stationary half-wave dipol...

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Main Authors: Ahmad, Mohd. Riduan, Mohd. Esa, Mona Riza
Format: Article
Published: Universiti Teknikal Malaysia Melaka 2014
Subjects:
TK Electrical engineering. Electronics Nuclear engineering
Online Access:http://eprints.utm.my/id/eprint/51866/
http://journal.utem.edu.my/index.php/jtec/article/view/454
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spelling my.utm.518662018-10-31T12:39:17Z http://eprints.utm.my/id/eprint/51866/ Angular momentum of a rotating dipole Ahmad, Mohd. Riduan Mohd. Esa, Mona Riza TK Electrical engineering. Electronics Nuclear engineering In this paper, we derive the far field electromagnetic fields of a rotating half-wave dipole antenna. Theoretically, we have demonstrated that the far electromagnetic fields of a rotating half-wave dipole carry angular momentum in the term of φ-φ′, which is absent from the stationary half-wave dipole antenna. The term sin(κr -ωt + [φ -φ′]) tells us that the electromagnetic wave propagates outward with the speed of light c (evidence from k = ω/c) from the dipole along the r axis and both electric and magnetic fields are spinning (oscillate with ω rad/s) and orbiting (rotating with ω0 rad/s) along the r axis with the speed of light. The orbital frequency is evidence from the term φ -φ ′ =ω 0t -ω 0t' =ω 0r /c · Universiti Teknikal Malaysia Melaka 2014 Article PeerReviewed Ahmad, Mohd. Riduan and Mohd. Esa, Mona Riza (2014) Angular momentum of a rotating dipole. Journal of Telecommunication, Electronic and Computer Engineering, 6 (1). pp. 17-20. ISSN 2180-1843 http://journal.utem.edu.my/index.php/jtec/article/view/454
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic TK Electrical engineering. Electronics Nuclear engineering
spellingShingle TK Electrical engineering. Electronics Nuclear engineering
Ahmad, Mohd. Riduan
Mohd. Esa, Mona Riza
Angular momentum of a rotating dipole
description In this paper, we derive the far field electromagnetic fields of a rotating half-wave dipole antenna. Theoretically, we have demonstrated that the far electromagnetic fields of a rotating half-wave dipole carry angular momentum in the term of φ-φ′, which is absent from the stationary half-wave dipole antenna. The term sin(κr -ωt + [φ -φ′]) tells us that the electromagnetic wave propagates outward with the speed of light c (evidence from k = ω/c) from the dipole along the r axis and both electric and magnetic fields are spinning (oscillate with ω rad/s) and orbiting (rotating with ω0 rad/s) along the r axis with the speed of light. The orbital frequency is evidence from the term φ -φ ′ =ω 0t -ω 0t' =ω 0r /c ·
format Article
author Ahmad, Mohd. Riduan
Mohd. Esa, Mona Riza
author_facet Ahmad, Mohd. Riduan
Mohd. Esa, Mona Riza
author_sort Ahmad, Mohd. Riduan
title Angular momentum of a rotating dipole
title_short Angular momentum of a rotating dipole
title_full Angular momentum of a rotating dipole
title_fullStr Angular momentum of a rotating dipole
title_full_unstemmed Angular momentum of a rotating dipole
title_sort angular momentum of a rotating dipole
publisher Universiti Teknikal Malaysia Melaka
publishDate 2014
url http://eprints.utm.my/id/eprint/51866/
http://journal.utem.edu.my/index.php/jtec/article/view/454
_version_ 1643653084916744192
score 13.211869

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