Personal Radio Presentation on Radio Waves Tech_1002

1. Naomi Fegan P11254419 Tech_1002 Studies in Media Technology Use and importance of radio waves and signals beyond radio broadcasting

3. Radio in Broadcasting

4. Telephones and Televisions

5. Wi-Fi

6. Navigation and Radar

7. References

9. Radio in Broadcasting Radio has come a long way from when it was invented in the 1800's and found it's way in home in the 1900's. Mainly in how the way the waves reach your radio set at home. At first it was AM, Amplitude Modulation, where the height (amplitude) of the wave changed with each section of signal, however this leads to much interference and is mostly used for talk shows today. FM followed, more popular today than AM, where the frequency of the wave changes, this means there is less chance of interference because the signal can be decoded easier than AM. However, like most things, radio is now turning Digital. Which is meant to be better than FM however there have been many arguments against this, saying Digital Audio Broadcasing (DAB) has poor reception quality and even a time delay.

12. A wireless router receives the radio waves and decodes it, then the router sends the information to the internet.

13. The radios used for Wi-Fi are similar to the radios used for walkie-talkies, mobile phones and other devices by converting the electrical signals into radio waves and then back again after.

14. They also transmit at a higher frequency allowing the signal to carry more data.

17. http://en.wikipedia.org/wiki/Digital_Audio_Broadcasting

18. http://electronics.howstuffworks.com/cordless-telephone5.htm

19. http://computer.howstuffworks.com/wireless-network1.htm

20. http://electronics.howstuffworks.com/gadgets/travel/gps2.htm