The antennas tag has no wiki summary.
17
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3answers
2k views
2
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3answers
116 views
Radio antennas that are much shorter than the wavelength
From my limited experience with ham radio when I was a kid, I expect transmitting and receiving antennas to have lengths that are on the same order of magnitude as the wavelength, and in fact I recall ...
6
votes
1answer
285 views
Why are fractal geometries useful for compact antenna design?
While most of what I've read about fractals has been dubious in nature, over the years, I keep hearing that these sorts of self-similar (or approximately self-similar) geometries are useful in the ...
3
votes
2answers
200 views
Radio communication and antennas
I'm trying to understand how an antenna is able to understand, but have a few quesions:
I understand that for an antenna to distinguish between 2 (or more) signals, they have to be in different ...
2
votes
3answers
997 views
Some questions about car radio and cellphone antennas
1-Why the antenna of the radio of cars is located outside the car and not inside?
2-If the answer to 1 is because that cars are like Faraday cages then how come my cell phone can receive signal ...
0
votes
1answer
376 views
How do EM waves get detached from an antenna?
How does an electro-magnetic waves get detached from an antenna and spread to the space?
While an antenna receives an EM wave, which quantity of the EM wave (electric or magnetic) is used for ...
