2. Radiocommunication First radio transmission made in 1895 (Marconi) After this radio was used on a everyday basis Now its estimated that more than 60% of the UK population use mobile phones
3. What is a radio wave? Mobiles & their base signals gain and give out signals by using electromagnetic fields All electromagnetic radiation involves of changing the electric & magnetic fields & the frequency Most radios have a frequency range, e.g. AM radio has a frequency between 180khz and 1.6mhz, FM radio ranges from 88 to 108mhz
4. How radio communicators work? Radio frequency used for radio communication is known as a carrier wave This is produced by a transmitter, which sends little information as its repeated If more information is sent then another process called modulation is used This process includes a feature of the carrier wave to be different in agreement with the info being sent
5. Base Stations Many of these are required so that it can hold a higher and stronger quality transmitted signal If there was just the one base station then that would only allow a limited amount of calls that would be transmitted at one time To help the slow increasing users, other network operators need to use a limited number of radio frequencies so that there could be a higher support for the amount of mobile phone users
6. Bibliography Linking Example (2000) Image of how radio communicators work. Available at: http://panhandleares.org/wp-content/uploads/2010/11/LinkingExample.gif (Accessed 25/01/2011) Mobile Evolution (2011) Image of mobile phones. Available at: http://www.celtnet.org.uk/mobile-phone/img/mobile-evolution.gif(Accessed 25/01/2011) Public Telecommunication Networks Unit (2001) How mobile phone networks work (WWW) Ofcom. Available at: http://www.sitefinder.ofcom.org.uk/mobilework.htm (Accessed 25/01/2011)
