Thread: How does antenna transmits electromagnetic waves?

How does antenna transmits electromagnetic waves? For example radio antenna. How does the antenna produces moving electromagnetic waves?

Basically, you need to modulate a pulse of electrical activity up and down the shaft of the antenna.

Very primitive stuff.

Usually, the messages are just as primitive............which keeps technology very "organically inclined" in the absence of a more developed theory and technology of electromagnetic propulsion.

Originally Posted by streamSystems

Basically, you need to modulate a pulse of electrical activity up and down the shaft of the antenna.

Very primitive stuff.

Usually, the messages are just as primitive............which keeps technology very "organically inclined" in the absence of a more developed theory and technology of electromagnetic propulsion.

But what makes them travel?

What makes the pulse in the antenna travel is the nature of space-time. Space-time is like the surface of water: a disturbance creates a ripple effect. It is as though space-time is inherently communicative, relaying information about itself everywhere. Still, for anyone to suggest that space-time is "intelligent" is against the grain of science. But that's not the issue here. The "automatically propagative" nature of EM radiation in space-time can also be explained by relativity, the need for a common observor reference. But, ultimately, it is the nature of space-time. The basic and fundamental reason why, well, one would need to derive space-time from a standard axiom base and theorise why. I know of such a theory, but it is not officially "science" as we would know it.

Originally Posted by streamSystems

What makes the pulse in the antenna travel is the nature of space-time. Space-time is like the surface of water: a disturbance creates a ripple effect. It is as though space-time is inherently communicative, relaying information about itself everywhere. Still, for anyone to suggest that space-time is "intelligent" is against the grain of science. But that's not the issue here. The "automatically propagative" nature of EM radiation in space-time can also be explained by relativity, the need for a common observor reference. But, ultimately, it is the nature of space-time. The basic and fundamental reason why, well, one would need to derive space-time from a standard axiom base and theorise why. I know of such a theory, but it is not officially "science" as we would know it.

Ok, I understand now. Thank you. But I have another question.
Ok, I have another question connected with antennas. I found a text from wikipedia, and also found this quote:

When encountering an interface, the waves are partially reflected and partially transmitted through.

Why the electromagnetic waves are partially reflected? When they encounter an interface, I think that there is process called absorption, so the electrons release the excess of energy in form of radiant energy, shouldn't that all energy be reflected?

Can you tell me how dipole antenna works?

What the dipole antenna is it for?

There were just 2 posts related to this a couple of days ago.

I'm curious, do live in a mainly english speaking country? If you are still learning english, then it's fine, but if you can do something about it, try to speak with better grammar...it can be hard to understand your questions because of it.

Dipole antenna.....maybe the electromagnetic field created is fluctuated slightly by the incoming radio waves, and is read through some form of detection system.