Radio Broadcasting

These days, many people think of "radio" as that thing attached to their clock or what they listen to in their cars. But radio transmission is a science. Learn more about this technology, from Ham Radio to Sirius and XM.

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How Radio Scanners Work

The air around you is bursting with radio waves -- and you can tap into them with minimal effort. With a simple radio scanner, all sorts of transmissions are within your earshot. Find out how radio scanners let you listen in on everything from police to astronaut transmissions.


How Walkie-talkies Work

From the playground to the war front, walkie-talkies play a significant role in keeping humans in contact with one another. How have two-way radios managed to stay relevant in an age of smartphones?

Building a radio is easier than you think. Read on and learn how to build your own radio.

History of Radio Pictures

You can’t see radio waves, but you can check out relevant telegraphs, vacuum tubes and early radio models in this gallery.

Could a wireless radio network save a miner's life?

A good communication network could help mine workers notify one another of unsafe conditions, but radio waves don't like to travel through rock. So what do you do?

Why do all FM radio stations end in an odd number?

The band that radio stations use is completely arbitrary. Learn how that relates to the specific frequency that FM stations use, and why all the FM radio stations in the United States end in an odd number?

How FCC Auctions Work

FCC auctions are a big deal in the communications industry. Learn more about how FCC auctions work in this article.

How HD Radio Works

A new radio format is set to add features to your radio listening experience: HD Radio. Learn how it works.

How Satellite Radio Works

Can you listen to your music as you drive cross country without searching for radio stations or fiddling with your MP3 player? Satellite radio subscribers can.

How Internet Radio Works

A college student in Wisconsin hears a dj in Jamaica play the latest calypso tune. An advocacy group unites members across the country via a private broadcast. It's made possible by Internet radio, the latest innovation in radio broadcasting since the business began in the early 1920s.

Is there an easy way to record a radio show so I can listen to it later?

Did you know you can record radio programs with a VCR? Next time, don't miss out on your favorite program!