parabolic
Light weighted antennas are used for communication
A satellite dish is a parabolic television antenna that receives signals from communication satellites in orbit around the earth. Its sole function is to provide the television viewer with a wider variety of channels.
Because of economics. On the ground you an afford to use a big transmitter and a big antenna, while on the satellite both have to be smaller. Therefore most of the power and the gain happens at the ground station.
A satellite antenna has one very important purpose. It is designed to allow a home to receive a satellite signal, which then allows users to receive a television signal.
satellite is satellite
An XM satellite radio antenna cannot be used as a cell phone antenna as they use a different type of connection. Satellite signals operate on a different frequency from cell phones and use different technologies in their antennas as well.
The options for car radio antennas include internal car antennas, external car antennas, power antennas, and satellite antennas. The internal antenna is the least effective and most cars come with either the external fixed antenna or the power antenna unless their is a satellite radio in the car and then it is a satellite antenna.
definition of optical satellite communication
The first communication satellite was Echo NASA
Transmitter => Antenna =========> Antenna => Receiver Receiver <=== Antenna <========= Antenna <= Transmitter
VSAT