Tagged Questions
2
votes
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 ...
0
votes
1answer
398 views
The limit of radio wave penetration
Why can I listen to my mobile phone's radio clearly inside the bus, inside the train, but not inside the elevator? Also, there is an interference of radio signal when the train is accelerating or ...
0
votes
3answers
112 views
How is extra information encoded in digital radio?
Earlier today, I was listening to my digital radio, and was intrigued as to how they are able to encode the information displayed on the LCD screen (which was basically a short string of text giving a ...
1
vote
3answers
911 views
Is visible light and radio waves made of the same thing?
I understand that there is such a thing as the electro magnetic spectrum, and that light and RF are both on it, so dose that mean that they are made of the same thing? Just at different frequencies.
6
votes
2answers
163 views
Multiple channels of information in single electromagnetic wave?
I'm trying to understand how can multiple radio stations transmit information just by transmitting using different frequency. The way I understand it all those different frequency waves add up to a ...
1
vote
1answer
485 views
How radio waves penetrate through buildings?
For example how radio signals of a base transceiver station (BTS) penetrate through buildings?
