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What does an antenna do?
• Converts signals to and from electromagnetic waves
• Enables wireless communication by transmitting and receiving
waves through space
Antennas work both ways
• A single RF antenna can transmit and receive signals
• Same structure, different function at different times
Types of antennas
• Omnidirectional: Radiates signal in all directions (360° coverage)
• Directional: Focuses signal in one direction for greater range and clarity
Transmitters Receivers
Metal conductor
Metal conductor
Antenna that generates
electromagnetic waves
Metal conductor
Metal conductor
Antenna that receives
electromagnetic waves
Transmitting antenna
Electrical signal € wave
motion € EM wave
Commonly used for
broadcasting, satellite,
transmission towers,
and live media
Receiving antenna
EM wave € intercepted by
antenna € converted to
electrical signal
Commonly used for TV
antennas, satellite dishes,
and signal receivers
Magnetic
wave
Electrical
wave
