Tuesday, 21 August 2012

WIRELESS TRANSMISSION MEDIA


WIRELESS TRANSMISSION MEDIA
Typs of light wave
·          Infrared (irDA)
·          Radio wave
·          Microwave
#. Infrared wireless transmission media :-
Ø  Used in small distance communication or controlling  section
Ø  Range 1 to 500 miter
Ø  DTR     1 to 100 mbps
Ø  Developed by irDA (infrared data associate )
Ø  Frequency 1000 GHz to 400 THz
#. Radio wave wireless transmission media:-
Ø  Range 70 miter to 1 km
Ø  DTR 1 to 10 mbps
Ø  Used in small distance communication or mobile data communication with frequency 10 kHz to 1000 MHz
Imp :- ILD = Injection laser diode   
#. Microwave wireless transmission media :-
Ø  Range  50 miter or more
Ø  DTR 1 to 10 mbps
Ø  With frequency 1000 MHz to 1000 GHz
Ø  Long distance communication
Note :- èirDA  - infrared energy is light that we can’t see but our bodies can detect as heat

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