GPS antenna module

The utility model provides a GPS antenna module, which comprises a biasing circuit unit, a switching current detection unit, a low-sound amplifier unit and a cutoff unit. The switching current detection unit detects whether an external antenna signal is inputted or not, if an inputted external anten...

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Bibliographic Details
Main Authors LIAO HONGJIN, CAI YUELIN, ZHUANG YITANG
Format Patent
LanguageChinese
English
Published 02.12.2009
Subjects
ANALOGOUS ARRANGEMENTS USING OTHER WAVES
DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES
MEASURING
PHYSICS
RADIO DIRECTION-FINDING
RADIO NAVIGATION
TESTING
TRANSMISSION
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Summary:The utility model provides a GPS antenna module, which comprises a biasing circuit unit, a switching current detection unit, a low-sound amplifier unit and a cutoff unit. The switching current detection unit detects whether an external antenna signal is inputted or not, if an inputted external antenna signal is detected, the switching current detection unit outputs a switching signal to the cutoff unit, the cutoff unit then outputs a cutoff signal to cut off the output signal of the low-sound amplifier unit, so that the GPS antenna module outputs the external antenna signal, and otherwise, the GPS antenna module outputs an internal antenna signal.
Bibliography:Application Number: CN20082176747U