1. Technology
You can opt-out at any time. Please refer to our privacy policy for contact information.

10 Things You Didn’t Know About Radio or Could Do With Radio

By

2 of 10

Did You Know Your Cell Phone is Really a Radio?
10 Things You Didn’t Know About Radio or Could Do With Radio
According to HowStuffWorks.com:

One of the most interesting things about a cell phone is that it is actually a radio -- an extremely sophisticated radio, but a radio nonetheless.

In the dark ages before cell phones, people who really needed mobile-communications ability installed radio telephones in their cars. In the radio-telephone system, there was one central antenna tower per city, and perhaps 25 channels available on that tower. This central antenna meant that the phone in your car needed a powerful transmitter -- big enough to transmit 40 or 50 miles (about 70 km).

It also meant that not many people could use radio telephones -- there just were not enough channels. The genius of the cellular system is the division of a city into small cells.

Read more at HowStuffWorks.com

Click NEXT or SCROLL DOWN for this feature's menu.

©2014 About.com. All rights reserved.