The following outline is provided as an overview of and topical guide to radio:
Radio – transmission of signals by modulation of electromagnetic waves with frequencies below those of visible light.[1] Electromagnetic radiation travels by means of oscillating electromagnetic fields that pass through the air and the vacuum of space. Information is carried by systematically changing (modulating) some property of the radiated waves, such as amplitude, frequency, phase, or pulse width. When radio waves pass an electrical conductor, the oscillating fields induce an alternating current in the conductor. This can be detected and transformed into sound or other signals that carry information.
Essence of radio edit
Applications edit
- Amateur radio
- Direction finding
- Radio broadcasting
- Radar
- Radio astronomy
- Radio navigation
- Radiotelephone
- Software-defined radio
- Two-way radio (Aviation, Land-based commercial, Government, Marine)
- Wireless power transfer
Types of radio broadcasting edit
Radio broadcasting topics edit
History of radio edit
Radio science edit
- Antenna (radio)
- Carrier current
- Electromagnetic radiation
- Radio frequency (electricity and electromagnetic waves)
- Radio spectrum (electromagnetic waves)
- Radio propagation
- Receiver (radio)
- Transmitter
- Types of radio emissions
Radio technology edit
Radio stations edit
Persons influential in the field of radio edit
- Michael Faraday (predictions)
- James Clerk Maxwell (theoretical work)
- Heinrich Rudolf Hertz (experimental demonstrations)
- Oliver Lodge (techniques for transmitting and receiving radio waves)
- Guglielmo Marconi (adapted radio waves for use in signalling)
- Reginald Fessenden (developed amplitude modulation (AM) radio and first voice transmission)
- Edwin Howard Armstrong (developed frequency modulation (FM) )
Alternatives edit
Other edit
- Bandstacked
- List of radios – List of specific models of radios
- Years in radio
See also edit
References edit
- ^ Dictionary of Electronics By Rudolf F. Graf (1974). Page 467.
External links edit