Class 12 Physics simulations · Electromagnetic Waves

Radiation from a dipole antenna

A half-wave dipole radiates most strongly at right angles to its length and not at all along it.

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What to notice

The 3D radiation pattern is a doughnut wrapped around the antenna.

Key relation

I(θ) ∝ sin²θ ; f = c / 2L

Try this

Move the receiver angle towards 0°. What happens to the signal?

What you can change

• Antenna length L: 0.1 to 3 m
• Receiver angle θ: 0 to 90 °

More in Electromagnetic Waves

• Displacement current between plates
• Light entering a medium (3D fields)
• Electromagnetic wave
• Photon energy across the spectrum
• Explore the EM spectrum

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