| 摘要 |
PURPOSE: A small GPS(Global Positioning System) antenna outputting a digital signal is provided to reduce the size by integrating into one unit a GPS antenna, an LNA(Low Noise Amplifier), a GPS down converter, a GPS correlator, and a power regulator. CONSTITUTION: A GPS patch antenna(121) is provided on an upper portion of a GPS antenna. A PCB(Printed Circuit Board)(25) is mounted on a lower portion of the GPS antenna at a predetermined distance. An LNA(23) amplifies an RF(Radio Frequency) signal of the GPS patch antenna(121). A GPS down converter(20) downs the RF signal passing through the LNA(23) to an intermediate frequency. A GPS correlator(21) digitizes the intermediate frequency. A port transmits a digital signal from the GPS correlator(21). The LNA(23), the GPS down converter(20), and the GPS correlator(21) are fixed on the PCB(Printed Circuit Board)(25).
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