presentation of antenna

presentation of antennaANTENNA
Report Aman ( )

AUDEN TECHNO. COM.

What is antenna?


A device is designed for radiating (or receiving) electromagnetic energy. (IEEE)
Energy radiating Energy receiving

Antenna

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Wave




C= 3 x 108 m/sec
v= c

ε

r

v c λ= = f f εr
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Dipole Antenna
/4 AC /4

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AUDEN TECHNO. COM.

Monopole Antenna
Actual antenna /4

ground /4 Image antenna
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Antenna of Mobile Phone
Antenna

Monopole Antenna PCB

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GSM & DCS-Wave length


GSM(880~960 MHz) Frequency 900 MHz

λ / 4 = 83mm
λ / 4 = 40mm
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DCS/PCS(1710~1990 MHz) Frequency 1880 MHz

Antenna Theory
Transmission

Line Theory Wave

V.S.W.R Characteristic Impedance….etc.
Electromagnetic

Gain, EIRP, Sensitivity…etc.

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