Volume 0x0b, Issue 0x3e, Phile #0x0b of 0x10
|=---------------------=[ The basics of Radio ]=-------------------------=|
|=-----------------------------------------------------------------------=|
|=------------------=[ shaun2k2
0 - Introduction
0.1 - Technical Terms
1 - Radio Basics
1.1 - Radio Waves
1.2 - Carrier
1.3 - (RF) Frequency Bands
1.4 - Wavelength
1.5 - Transmission
1.6 - Receiving
2 - AM Radio
2.1 - What is AM Radio?
2.2 - Modulation
2.3 - Demodulation
2.4 - Circuits
2.4.1 - Receivers
2.4.2 - Transmitters
3 - FM Radio
3.1 - What is FM radio?
3.2 - Modulation
3.3 - Demodulation
3.4 - Circuits
4 - Misc
4.1 - Pirate Radio
4.2 - Wireless Telephone Tapping
4.3 - Jamming
5 - Conclusion
6 - Bibliography
--[ 0 - Introduction
Ever since our discovery of radio, in around 1902, we have proceeded
to utilise it for many different purposes -- from sending others short
messages, to transmitting large and critical data sequences to other
computer systems. As time has gone on, as useful a technology as
radio is, it is barely noticed anymore. When most people think of
'radio', they picture a small black device sitting in their car,
which they will use to listen to their local radio stations during car
journeys. On the other hand, very few people realise the true
usefullness of radio, often forgetting that their cellphones,
televisions, satellite TV and alarm systems all too use radio to complete
their task on a very regular medium -- radio is not just that boring
old thing gathering dust in the corner.
This article is divided up into four parts. The first part describes
the basic theory of radio, and examples to illustrate some of the
common day uses of it. In parts two and three, AM and FM radio
details are outlined showing various different circuits to illustrate
how these principles can be applied to real-life, functioning
circuits. Section four is a misc. section, presenting some
miscellaneous interesting points. Some electronics knowledge is
useful in radio, though not totally necessary. Most circuits
presented here are quite rough, and can be greatly improved upon in
many ways.
