GPS signal transmission device

Abstract

The invention relates to a GPS signal transmission device, which comprises a direct-current power switching circuit (comprising a GPS power supply unit and more than one other power supply unit), a GPS receiving antenna outside a vehicle, an RF amplifying circuit and a GPS transmitting antenna inside the vehicle, wherein after receiving a direct-current power supply provided by a cigarette lighterinside the vehicle, the direct-current power switching circuit switches the direct-current power supply and provides a driving power supply for the RF amplifying circuit; the GPS power supply unit provides the driving power supply for a GPS device inside the vehicle; and the other power supply units provide the driving power supply for other electronic portable devices. The GPS receiving antennaoutside the vehicle receives an external GPS signal, and the RF amplifying circuit provides signal amplification and signal transmission between the GPS receiving antenna outside the vehicle and the GPS transmitting antenna inside the vehicle so as to transmit the external GPS signal to the GPS device in a wireless mode.

Description

technical field [0001] The present invention relates to a GPS signal transmission device, in particular to a GPS device capable of introducing an external GPS signal into a car in a wired manner and then wirelessly sending it to a GPS device in the car, and simultaneously providing a driver for the GPS device or other electronic portable devices. Power supply for the GPS signal transmission device. Background technique [0002] The Global Positioning System (Global Positioning System, usually abbreviated as GPS) is widely used in car navigation. General car drivers are accustomed to using GPS as car navigation to avoid the inconvenience of searching for traditional paper maps. Please refer to figure 1 , which is a schematic diagram of known GPS car navigation. A GPS device 60 placed in the car receives GPS signals from the GPS satellite 2, but the GPS device 60 is often blocked by the metal heat-insulating paper 4 on the glass or the car shell 6, making it difficult for ex...

AI Technical Summary

Problems solved by technology

This kind of navigation device solves the above-mentioned shortcomings of some GPS devices without an external antenna jack, but its disadvantage is that the navigation device has already occupied the cigarette lighter in the car as its power source, and there is only one cigarette lighter in the car generally. Therefore, it is no longer possible to provide power for GPS devices, not to mention that with the rapid development of technology, more and more electronic portable devices such as MP3 players, mobile phones or mobile phone chargers need to use the cigarette lighter in the car when there is an emergency power failure. Derivative charging products (such as cigarette lighter to USB interface charger) for charging

Therefore, when using the above-mentioned navigation device, the driver will be distressed because the GPS device or other electronic portable devices cannot use the power of the cigarette lighter in the car at the same time

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