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Angular Momentum of a Rotating Dipole
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نویسنده
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Ahmad Mohd Riduan ,Esa Mona Riza Mohd
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منبع
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journal of telecommunication, electronic and computer engineering - 2014 - دوره : 6 - شماره : 1 - صفحه:17 -20
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چکیده
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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(kr −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_0 t −ω_0 t' =ω_0 r /c .
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کلیدواژه
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angular momentum ,electric field ,magnetic field ,rotating dipole
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آدرس
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Uppsala University, Department of Engineering Sciences, Sweden. Universiti Teknikal Malaysia Melaka, Faculty of Electronic and Computer Engineering, Malaysia, Uppsala University, Department of Engineering Sciences, Sweden. Universiti Teknologi Malaysia, Faculty of Electrical Engineering, Malaysia
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Authors
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