The prime purpose of radio is to convey information Radio waves have the from one place to another. longest wavelengths in the electromagnetic spectrum. Radio waves do more than just bring music to your radio. They also carry signals for your television and mobile phones. Mobile phones use radio waves to transit information they are smaller than TV and FM radio waves.
What is wireless technology ?Wireless is a term used to describetelecommunications in whichelectromagnetic waves carry the signalover the communication path. Why is it so useful?It goes where the wire/cable cannot(Wireless analytical systems utilize field-replaceable lithium thionyl chloridepower modules, requiring no externalpower sources or additional wiring.) itprovides broadband access extension,it is cost effective and it increasesefficiency. It is used on most things weuse daily like mobile phones, internetand home entertainment systems.Wireless enables a fully comprehensiveaccess technology portfolio to work withexisting dial, cable, and DSLtechnologies.
Radio is one of our most important ways of communicating. Radio waves have frequencies from 300 GHz to as low as 3 kHz, and corresponding wavelengths from 1 millimeter to 100 kilometers Radio stations arrange songs and programs of particular genres to broadcast to listeners who tune in to hear them. Most stations provide short newscasts and talk radio provides a public forum where people can listen to interviews or call in to speak with the host or his or her guests. Sports events can be broadcast as an announcer provides a play-by-play description of the action. Companies can buy ad space on privately owned stations to air commercials designed to appeal to that stations listeners. Commercial vehicles such as taxis, trucks, and airplanes use radios to receive directions and report difficulties. Construction crews, farmers, ranchers, and other groups use radio to send and receive information such as instructions and warnings. Radio is used extensively in the military to facilitate communication between bases, ships, planes, military vehicles, and field units
A microwave oven is akitchen appliance that heatsfood by dielectric heating,using microwave radiation toinduce polarized moleculeswithin the food. A microwavetube(usually a magnetron)converts 60 Hz electric powerinto an electromagneticwave, withstandardized frequency of2.45 GHz. Below is a figurefrom the original patentdrawn by Dr.Percy Spencerof Raytheon Corporation, in1950 (the first experimentsdate from 1946).
Bluetooth is a wirelesstechnology for exchangingdata over short distances. It isused with mobile phonesconsoles and PC’s. Bluetoothuses a radio technology calledfrequency-hopping whichchops up the data being sentand transmits bits of it on up to79 bands. Because the devicesuse a radio communicationssystem, they do not have to bein visual line of sight of eachother, however beams ofradiation roaming in freespace which are limited interms of wavelengths anddiffractions(quasi optical) mustbe viable.
Wi-Fi is a wireless networking technology that uses radio waves to provide wireless high-speed Internet and network connections. It works without any wires between the receiver and sender using Radio Frequency technology, a frequency that involves radio wave propagation. When an RF current is equipped to an antenna, an electromagnetic field is conceived that then is able to reproduce through space.
Radar is an object- If the wavelength is detection system which much shorter than the uses radio waves to targets size, the wave determine the direction, will bounce off in a speed, altitude, or range similar way to how light of objects. It can be is reflected by a mirror. If used to detect aircrafts, the wavelength is much weather forecasts, longer than the size of guided missiles and the target, the target is motor vehicles and likely not to be visible . terrain. Electromagnetic Short radio waves reflect waves scatter from any from curves and corners large change in the like a sparkle from a dielectric constant or broken bit of glass. diamagnetic constants.
Radio waves are important and they dominate most of today’s ways of transmit information in technology, being the longest wavelength in the spectrum. It is also faster, abrupt and economical way to transmit information. Without radio waves there would not be any good devices out there, the world is dependant upon radio waves to deliver great service.
WORD INFO (2012) Wireless communications with electromagnetic waves [WWW] Word info. Available from: http://wordinfo.info/unit/4003/ip:1/il:W [Accessed 28/01/2012]. KIMALDI (2012) Wireless technology advantages [WWW] Kimaldi. Available from: http://www.kimaldi.com/kimaldi_eng/knowledge_area/wireless_technology/wireless_techn ology_s_advantages [Accessed 28/01/2012] CROWN (2011) Wireless communications [WWW] is4Profit. Available from: http://www.is4profit.com/business-advice/it-telecoms/wireless-communications/the- benefits-of-wireless-communication.html [Accessed 28/01/2012] Bluetooth. 2012. Bluetooth. [ONLINE] Available at: http://thingsfinder.com/info/bluetooth/ [Accessed 30 January 2012]. IEEE Xplore - Sign In. 2012. IEEE Xplore - Sign In. [ONLINE] Available at: http://ieeexplore.ieee.org/stamp/stamp.jsp?arnumber=00175252. [Accessed 30 January 2012]. What is Wi-Fi? - A Word Definition From the Webopedia Computer Dictionary. 2012. [ONLINE] Available at: http://www.webopedia.com/TERM/W/Wi_Fi.html. [Accessed 30 January 2012]. Radar - Wikipedia, the free encyclopedia. 2012. Radar - Wikipedia, the free encyclopedia. [ONLINE] Available at: http://en.wikipedia.org/wiki/Radar [Accessed 30 January 2012]. Microwave oven - Wikipedia, the free encyclopedia. 2012. Microwave oven - Wikipedia, the free encyclopedia. [ONLINE] Available at: http://en.wikipedia.org/wiki/Microwave_oven. [Accessed 30 January 2012]. 2012. . [ONLINE] Available at: http://emlab.uiuc.edu/ece350/suppnotes/moven.pdf. [Accessed 30 January 2012].
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