FUNCTION	LIMITATIONS
SATELLITE ANTENNA	Sends and receives data, voice, or video signals from a source, through the air to a satellite in space, and then back down to Earth to a receiver antenna.	Expensive to launch satellite. Must install antenna dish at both ends to receive or send signals.
MICROWAVE ANTENNA	Sends voice or data signals through the air using a cellular network that picks up the signals and transfers them to adjacent cells until they reach their destination.	Requires line of sight so not good for areas with tall building or hills. May need to construct a tower to mount equipment that receives and sends signals.
CABLE OR PHONE LINES	Sends data, voice, and video signals over copper, coaxial, or fiber optic lines to and from a source on the ground.	Expensive to lay the lines to cover the area, on telephone poles or in the ground. Not practical for remote areas.

3 Minutes If Pete was trying to send a message to BJ using a wireless communication device, which antenna(s) could be used to send the signal? Click on the letter that reflects the best answer. HINT: Refer to the chart to see how information is sent and received. A) satellite B) microwave C) cable or phone lines D) A or B

HELP

Please send any comments to:
Curator: Tom.Benson@grc.nasa.gov
Responsible Official: Kathy.Zona@grc.nasa.gov