radio - определение. Что такое radio
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Что (кто) такое radio - определение

TECHNOLOGY OF SIGNALING AND COMMUNICATING USING RADIO WAVES
Radio transmission; Radio communications; Radiocommunication; RADIO; Terrestrial Radio; Radio communication; Radios; Radio communication system; Radio technician; Radio technology; Radio mechanic; Radio data communication; Applications of radio; Radiocommunications
  • Comparison of AM and FM modulated radio waves
  • [[Frequency]] spectrum of a typical modulated AM or FM radio signal.  It consists of a component ''C'' at the [[carrier wave]] frequency <math>f_c</math> with the information ([[modulation]]) contained in two narrow bands of frequencies called [[sideband]]s (''SB'') just above and below the carrier frequency.
  • Albuquerque]], New Mexico, US
  • Rotating marine radar antenna on a ship
  • Radio communication.  Information such as sound is converted by a transducer such as a [[microphone]] to an electrical signal, which modulates a [[radio wave]] produced by the [[transmitter]]. A receiver intercepts the radio wave and extracts the information-bearing modulation signal, which is converted back to a human usable form with another transducer such as a [[loudspeaker]].
  • Volkswagen's RNS-510 receiver supports [[Sirius Satellite Radio]].
  • Wildlife officer tracking radio-tagged mountain lion
  • Neighborhood wireless WAN router on telephone pole
  • shows its own photo]]

radio         
¦ noun (plural radios)
1. the transmission and reception of radio waves, especially those carrying audio messages.
2. the activity of broadcasting sound to the public.
a broadcasting station or channel.
3. an apparatus for receiving radio programmes.
an apparatus capable of receiving and transmitting radio messages.
¦ verb (radioes, radioing, radioed) send a message by radio.
?communicate with by radio.
Origin
early 20th cent.: abbrev. of radio-telephone.
radio         
(radios, radioing, radioed)
Frequency: The word is one of the 700 most common words in English.
1.
Radio is the broadcasting of programmes for the public to listen to, by sending out signals from a transmitter.
The announcement was broadcast on radio and television.
N-UNCOUNT: oft N n
2.
You can refer to the programmes broadcast by radio stations as the radio.
A lot of people tend to listen to the radio in the mornings...
N-SING: the N
3.
A radio is the piece of equipment that you use in order to listen to radio programmes.
He sat down in the armchair and turned on the radio.
N-COUNT
4.
Radio is a system of sending sound over a distance by transmitting electrical signals.
They are in twice daily radio contact with the rebel leader.
N-UNCOUNT: oft N n
5.
A radio is a piece of equipment that is used for sending and receiving messages.
...the young constable who managed to raise the alarm on his radio...
N-COUNT
6.
If you radio someone, you send a message to them by radio.
The officer radioed for advice...
A few minutes after take-off, the pilot radioed that a fire had broken out.
VERB: V adv/prep, V that, also V n, V
Radio         
·add. ·adj Of or pertaining to, or employing, or operated by, radiant energy, specifically that of electric waves; hence, pertaining to, or employed in, radiotelegraphy.

Википедия

Radio

Radio is the technology of signaling and communicating using radio waves. Radio waves are electromagnetic waves of frequency between 3 hertz (Hz) and 300 gigahertz (GHz). They are generated by an electronic device called a transmitter connected to an antenna which radiates the waves, and received by another antenna connected to a radio receiver. Radio is widely used in modern technology, in radio communication, radar, radio navigation, remote control, remote sensing, and other applications.

In radio communication, used in radio and television broadcasting, cell phones, two-way radios, wireless networking, and satellite communication, among numerous other uses, radio waves are used to carry information across space from a transmitter to a receiver, by modulating the radio signal (impressing an information signal on the radio wave by varying some aspect of the wave) in the transmitter. In radar, used to locate and track objects like aircraft, ships, spacecraft and missiles, a beam of radio waves emitted by a radar transmitter reflects off the target object, and the reflected waves reveal the object's location. In radio navigation systems such as GPS and VOR, a mobile receiver accepts radio signals from navigational radio beacons whose position is known, and by precisely measuring the arrival time of the radio waves the receiver can calculate its position on Earth. In wireless radio remote control devices like drones, garage door openers, and keyless entry systems, radio signals transmitted from a controller device control the actions of a remote device.

Applications of radio waves that do not involve transmitting the waves significant distances, such as RF heating used in industrial processes and microwave ovens, and medical uses such as diathermy and MRI machines, are not usually called radio. The noun radio is also used to mean a broadcast radio receiver.

The existence of radio waves was first proven by German physicist Heinrich Hertz on November 11, 1886. In the mid 1890s, building on techniques physicists were using to study electromagnetic waves, Guglielmo Marconi developed the first apparatus for long-distance radio communication, sending a wireless Morse Code message to a source over a kilometer away in 1895, and the first transatlantic signal on December 12, 1901. The first commercial radio broadcast was transmitted on November 2, 1920, when the live returns of the Harding-Cox presidential election were broadcast by Westinghouse Electric and Manufacturing Company in Pittsburgh, under the call sign KDKA.

The emission of radio waves is regulated by law, coordinated by the International Telecommunication Union (ITU), which allocates frequency bands in the radio spectrum for various uses.

Примеры употребления для radio
1. Trimble, acting president of Radio Free Europe/Radio Liberty –– commonly known as Radio Liberty.
2. Its local radio stations are throttling commercial local radio.
3. Ms Zaki owned a radio station called Peace Radio.
4. The writer is president of Radio Free Europe/Radio Liberty.
5. It also owns the Radio Rossii and Mayak radio stations.