A GPS antenna is a device that helps boost the reception signal to a GPS unit, whether it is a standalone unit or an embedded unit. 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. Access GPS Antenna made in Taiwan & China. Information on company profile, product categories & images of GPS Antenna manufacturers & suppliers from Taiwan & China available online on B2BManufactures.com.
source: wiseGeek.com: Clear Answers for Common Questions