subject: A Quick Guide To Gps Antenna [print this page] GPS Antenna is an important part of the user facility: GPS receiver gets satellite signals and related data through an antenna; the baseline and three-dimensional coordinates vector GPS obtained which used for geodetic measurements, is the result of the coordinate vector between the centres of GPS antenna, plus the antenna height, then after corresponding correction.
GPS antenna, a device used by GPS to transmit and receive signals, has similar use of TV and mobile phone antenna.
GPS antenna receives and sends signals continuously and updates the user's location information continuously by means of refreshing information every second.
The GPS antenna works by combining a planar antenna and a frequency converter, which converts the high-frequency phase-modulated spread spectrum signal of the GPS system to an intermediate frequency.
The GPS antenna receives the signal (active antennas amplify the signal a bit) and sends it down the line to the receiver.
GPS antenna should be mounted outside with a clear view of the sky. Never mount a GPS antenna at an angle to the horizon, since, the antenna cannot "see" below that angle. For similar reasons, mounting a GPS antenna between tall buildings can get unpredictable results.
Often a GPS antenna is used in a situation where the GPS unit itself is somehow removed from a line of sight to the sky, as in a car, to help the GPS "see" the sky without having to be moved. GPS antennae may be purchased for a range of budgets, or cheaper home versions can be made with fairly common components.
GPS Antenna splitters eliminate the need to run several antenna cables from several antennas on the roof.
The GPS antenna can either be an active type or passive type. A GPS antenna is 'active', meaning they have an amplifier build-in next to the antenna to enhance the signal from the satellites and to overcome cable losses.
The GPS antenna also needed to be lightweight and small enough to meet the challenging design criteria set for the product for ultimate customer usability. Normally the GPS antenna is pretty tiny in dimension, measuring much less than 90cm in diameter.
