With the gradual advancement of the concept of autonomous driving and smart car, people have higher requirements on the interactivity, intelligence and interconnectivity of cars. Today, most automobile manufacturers and suppliers generally integrate GNSS positioning function with other signals such as radio, TV, Bluetooth, Wifi into the car, including Bosch, Continental, Delphi, Marelli, Mitsubishi, Volkswagen, FAW, etc. The whole system will need antennas for external gain and expansion. The entire system will require antennas for external gain and extension, and how to combine these components in a compact, efficient and cost-effective way is a key issue.