Simple electromagnetic wave including delay

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SUMMARY

The discussion focuses on deriving the electric and magnetic fields around an infinitely long wire carrying a sinusoidal alternating current, incorporating phase delay due to the finite speed of wave propagation. The solution must adhere to Maxwell's equations and is linked to the concept of traveling wave antennas. Key references include sections 8.2-8.3 on retarded potentials in "Electromagnetic Theory" by Stratton and a paper by Beverage, Rice, and Kellogg. The velocity of the sinusoidal wave is crucial for determining the field pattern, particularly for sub-luminal conductor propagation.

PREREQUISITES
  • Understanding of Maxwell's equations
  • Familiarity with sinusoidal alternating current concepts
  • Knowledge of retarded potentials in electromagnetic theory
  • Basic principles of traveling wave antennas
NEXT STEPS
  • Study sections 8.2-8.3 on retarded potentials in "Electromagnetic Theory" by Stratton
  • Read the paper by Beverage, Rice, and Kellogg on wave antennas
  • Explore the effects of phase delay in electromagnetic wave propagation
  • Investigate the design and analysis of traveling wave antennas
USEFUL FOR

Electrical engineers, physicists, and students studying electromagnetic theory, particularly those interested in antenna design and wave propagation phenomena.

a1titude
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TL;DR
$E(r,t)$ and $H(r,t)$ around $I*\sin(2*pi*f*t)$
I want to derive the electric and magnetic field at a point around an infinitely long wire which carries a sinusoidal alternating current. And I want the answer includes the phase delay according to the limited speed of propagation of the wave. Surely the answer must satisfy the Maxwell's equations. I have never seen such answers from anywhere yet. Please, someone derive them for me or recommend me some references.
 
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Look at the sections 8.2-8.3 on retarded potentials in Stratton, Electromagnetic Theory.
 
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a1titude said:
And I want the answer includes the phase delay according to the limited speed of propagation of the wave.
That is a type of travelling wave antenna, but with an infinite length wire.

The velocity of the sinusoid propagating along the wire is critical in determining the field pattern.
For sub-luminal conductor propagation, (with insulation or oxide), most of the energy is launched in the direction the sinusoid is propagating along the conductor, the conductor forward of there, can often be discounted.

The problem was solved over 100 years ago. You have obviously been reading the wrong books and papers.

This paper, by Beverage, Rice and Kellogg, is well worth reading at breakfast.
https://www.crosscountrywireless.net/The Wave Antenna.pdf
 
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