The radio tag has no wiki summary.
4
votes
4answers
807 views
How does radio receives signal from particular station?
When you tune your radio (digital or analog) to receive say 100 MHz frequency and while in the environment there are hundreds of channels everywhere around the radio. How does it chooses to receive ...
8
votes
3answers
260 views
Why is this radio telescope's reflector spherical and not parabolic?
This is the Arecibo Observatory in Arecibo, Puerto Rico. Its reflector is spherical, measuring 1,001 ft. in diameter. It is considered the most sensitive radio telescope on Earth, but the fact that ...
3
votes
2answers
193 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 ...
3
votes
4answers
2k views
Understanding the cause of sidebands in Amplitude Modulation
I've read it many places that Amplitude Modulation produces sidebands in the frequency domain. But as best as I can imagine it, modulating the amplitude of a fixed-frequency carrier wave just makes ...
0
votes
1answer
330 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 ...
0
votes
1answer
165 views
What makes up a resonator of radio?
I was reading this article about resonators.
Quote:
The sine wave that matches that particular frequency will get
amplified by the resonator, and all of the other frequencies will be
...
