radio

Radio is the technology of signaling and communicating using radio waves. Radio waves are electromagnetic waves of frequency between 30 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 very 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 different uses.

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  1. R

    Help AMATEUR RADIO

    Good Day po ask lang po sana ako po ay isang Assistant DRRM Coordinator nagtataka lang ako sa Baofeng UV-17L ko naka manual programming po siya for frequency tapos nilagyan ko lang ng Name sa CHIRP Software wala na po akong ibang ginawa. Nagtataka lang ako lumindol kasi kahapon di ako marinig ng...
  2. X

    New Update XROM Radio

    Hidden content
  3. B

    Website na radio

    hellow po sainyon lahat mayroon akon na tuklas na site na Radio . tutorial . Step 1: Punta ka sa google chrome step2: iresearch mo ang radio.gardin mula sa google searchin bar anf good luck kung gumagana . paki remove mo kung copyright thread ito sainyon lahat
  4. M

    PH Local FM Radio m3u file

    Kinolekta ko lang. Pandagdag sa playlist nyo. Sana makatulong. 🙂 Hidden content
  5. P

    Poll How about a radio station powered by PHC?

    Would like to see a radio station powered by PHC. All we need is a server then the community will take charge of the content. We already have music contributors dumping music regularly to music section so i think it's time to hear them on a radio setup. Comment below your thoughts about it.
  6. E

    Help Online radio for pc

    mam/ser, bka may alam po kaung link ng ONLINE RADIO FM STATION salamat po
  7. J

    Wish 107.5 - Radio Livestream

    WISH 107.5 FM LINK: Hidden content 👉🏻 Thankyou Lang Po Sapat Na 🙂❤
  8. G

    Trivia The Radio took 38 years to reach an audience of 50 million.

    You would think the invention of the radio would be a big deal, but it took 38 years for the radio to reach an audience of 50 million. Meanwhile, the iPod only took 3 years to reach the same milestone.
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    Radio News.

  10. V

    Penge Streaming Link ng Local Radio Stations

    Hi guys. bka meron kayo Streaming links ng local radio stations. un from source. ilalagay q sa bussid thanks sa tutulong
  11. M

    Feast of the Immaculate Conception of Mary Special

    TV Maria & Radio Maria Philippines (for Feast of the Immaculate Conception of Mary) TV Maria is a national Catholic television channel broadcasting from Manila, Philippines managed by the Archdiocese of Manila in the service of the Catholic Bishops' Conference of the Philippines and owned by TV...
  12. M

    TV Maria and Radio Maria

    TV Maria & Radio Maria Philippines (for Feast of the Immaculate Conception of Mary) TV Maria is a national Catholic television channel broadcasting from Manila, Philippines managed by the Archdiocese of Manila in the service of the Catholic Bishops' Conference of the Philippines and owned by...
  13. X

    Anong radio ang maganda sa long ride?

    Anong recommended nyo na radio setup para sa mga naglo-long ride both urban at rural areas?
  14. B

    Help Radio News PH?

    Ano pong radio ngayun dito ss Pilipinas amg nag babalita? Ty po.
  15. L

    PH Local Radio Stations (M3U)

    Download it here : https://bit . ly/PHRadio (Remove the spaces) And put it in any IPTV Player. (I recommend Kodi) Will be updating this every week. UPDATES: 10/11/22 - Added Wish 107.5 for the FM 10/7/22 - Added Star FM 102.7 and Magic 89.9 for the FM. 10/2/22 - 1. You can now load it in...
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    Help Alpine 7524T Casette Sterio

    So habang nagge-general cleaning kami dito sa bahay, nahanap namin tong Alpine 7524T na stereo at mukhang car radio siya. Gusto ko po sana siyang irestore pero di naman ako pamilyar sa components niya at tsaka di naman po ako technician. Meron po bang pamilyar sa inyo nito? Balak ko po siyang...
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    Closed Best radio stations in the Philippines?

    Guys baka may idea kayo kung anong magandang radio station dito satin na pang chill2x lang.
  18. R

    Closed About radio broadcating sfx

    Saan guys pwede magdownload ng free radio broadcasting sound effects? Help
  19. I

    Ham radio operator

    May mga amateur radio operator po ba dito?
  20. C

    Closed Radio station visiting

    Ask ko lang po kung anong AM and FM Station yung pwede magpa-book/reserve ng 6 person for visiting. Kung sino po yung may mga experience sa visiting ng mga station dyan, pahingi naman po advice hehe. Manila area po.
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