Sketch electric field of beamed antenna.

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SUMMARY

The discussion focuses on sketching the electric field of a beamed antenna with large directional gain that broadcasts linearly polarized radiation. The participants confirm that the electric field can be derived from the dipole radiation pattern, suggesting that a proper deformation of the dipole's electric field can yield the desired sketch. Additionally, it is established that the magnetic field will appear similar but rotated 90 degrees about the beam axis. The concept of using multiple dipole radiators aligned on a common axis to achieve the beamed radiation is also highlighted.

PREREQUISITES
  • Understanding of dipole radiation patterns
  • Knowledge of electromagnetic field theory
  • Familiarity with linear polarization concepts
  • Basic skills in sketching vector fields
NEXT STEPS
  • Research the mathematical modeling of dipole radiation patterns
  • Explore the principles of electromagnetic wave propagation
  • Learn about the effects of antenna array configurations on radiation patterns
  • Investigate the relationship between electric and magnetic fields in electromagnetic waves
USEFUL FOR

Electrical engineers, antenna designers, physicists, and students studying electromagnetic theory will benefit from this discussion.

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Suppose we have an antenna which has large directional gain. Suppose the antenna broadcasts linearly polarized radiation in a narrow beam and at constant frequency. Sketch the electric field in the plane which contains both the electric field and the beam axis. Does the attached come close?
 

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Will the magnetic field look similar but rotated a quarter turn about the beam axis?

Given the electric field work backwards and sketch the vector potential.

Thanks for any help!
 

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