WIRELESS TECHNOLOGY AND DEVICE

WIRELESS TECHNOLOGY AND DEVICE

1. ELECTROMAGNETIC WAVE

   • CARRY INFORMATION BETWEEN DEVICES
   • EXAMPLE: CELLULAR PHONE

2. ELECTROMAGNETIC SPECTRUM

   • EXAMPLE: RADIO, TELEVISION BROADCAST BANDS, VISIBLE LIGHT

3. MOST COMMON WAVELENGHT

   • USE FOR PUBLIC WIRELESS COMUNICATIONS INCLUDE THE INFRARED AND RADIO FREQUENCY BAND
   • INFRARED ( IR )
     • ONE TO ONE TYPE OF CONNECTION
     • USED FOR SHORT RANGE
   • RADIO FREQUENCY ( RF )
     • ONE TO MANY COMUNICATON
     • LIMITED TO SHORT RANGE COMMUNICATION
     • CERTAIN AREA OF RF BANDS HAVE BEEN SET ASIDE FOR USED BY UNLICENSED DEVICE SUCH AS WIRELESS LAN , CORDLESS PHONE, AND COMPUTER PERIPHERAL

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