# Visualization of electric field around dipole antenna

• GhostLoveScore
In summary, the conversation discusses the behavior of the electric field around a dipole antenna at different distances, specifically in the far field, near field, and in between. The speaker also mentions a point where the field reverses and forms a loop, and how higher frequencies affect this behavior. Ultimately, the conversation concludes that the field will break away from the antenna at a certain point due to its wavelength.
GhostLoveScore
I came across these videos that show how electric field looks around the dipole antenna at three different distances

Far field

Near field

Something between far and near field

That got me thinking - there is a point when the field is reversing and the electric field closes into a loop and propagates away from the antenna.
If this animation is correct it would seem that the E field closes into a loop because the field close to the antenna is changing too rapidly and the rest of the field can't keep up and eventually thick yellow lines come very close and connect. And that leaves the rest of the field not connected to antenna anymore.

Am I making any sense here?

Yes. That makes sense. The higher the frequency, the sooner you get the wave 'breaking away', I.e. it's wavelength related.

GhostLoveScore

## 1. What is a dipole antenna?

A dipole antenna is a type of radio antenna that consists of two conductive elements, typically straight rods or wires, that are oriented parallel to each other. It is commonly used for radio and television broadcasting, as well as in wireless communication systems.

## 2. How does a dipole antenna transmit and receive signals?

A dipole antenna works by converting electrical signals into electromagnetic waves, which can then be transmitted through the air. When an electrical current is applied to the antenna, it creates an oscillating electric field that radiates electromagnetic waves. These waves can then be received by another antenna tuned to the same frequency.

## 3. What is the purpose of visualizing the electric field around a dipole antenna?

Visualizing the electric field around a dipole antenna can help researchers and engineers better understand how the antenna works and identify potential areas for improvement. It can also be used to optimize the placement and orientation of the antenna for maximum signal strength.

## 4. How is the electric field around a dipole antenna visualized?

The electric field around a dipole antenna can be visualized using computer simulations or physical experiments. In computer simulations, mathematical models are used to calculate and display the electric field in different directions and distances from the antenna. In physical experiments, specialized equipment such as an electric field probe can be used to measure and map the electric field.

## 5. What factors can affect the shape of the electric field around a dipole antenna?

The shape of the electric field around a dipole antenna can be affected by several factors, including the length and diameter of the antenna, the frequency of the signal, and the surrounding environment. Changes in any of these factors can alter the shape and strength of the electric field, which can impact the performance of the antenna.

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