Questions about antenna

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In summary, antennas work by producing an electromagnetic field when an alternating current flows through them, and they can also induce an electric current when placed in an alternating electromagnetic field. This allows for various technologies, such as electromagnets and transformers, to function. Resources for further information on antennas can be found through a simple internet search.
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ASidd
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How exactly does an antenna work?

When Alternating current is produced into the conducting rod why does it propagate into space as electromagnetic waves or in other words what causes the current to leave the antenna?

Also when electromagnetic waves interact with a receiving antenna what exactly happens that changes them back into current?

If someone could give me links to some resources; it would be greatly appreciated.

Thanks
 
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Current flowing through a wire creates an electromagnetic field around it; an alternating electric current creates an alternating electromagnetic field.

Similarly, a wire put in an alternating electromagnetic field will have an induced electric current within it. Thus, antennas are born and a lot of other technologies are enabled as well like electromagnets and transformers.

Ever tried a google search?
http://en.wikipedia.org/wiki/Antenna_(electronics [Broken])
 
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What is an antenna?

An antenna is a device that is used to transmit and receive radio frequency signals. It converts electrical currents into electromagnetic waves and vice versa.

How does an antenna work?

An antenna works by converting electrical energy into radio waves. When an alternating current flows through the antenna, it creates an electromagnetic field that radiates outwards as radio waves. These waves can then be received by other antennas tuned to the same frequency.

What are the different types of antennas?

There are many different types of antennas, including dipole, monopole, loop, patch, and yagi antennas. Each type has its own unique design and characteristics, making them suitable for different applications.

What factors affect the performance of an antenna?

The performance of an antenna can be affected by several factors, including its size, shape, material, and surroundings. The frequency and direction of the signal also play a role in determining the antenna's performance.

How do I choose the right antenna for my needs?

Choosing the right antenna depends on your specific needs and the application you are using it for. Factors to consider include the frequency range, gain, and directionality of the antenna. It is best to consult with an expert or do research to determine the best antenna for your specific use case.

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