How to install TV antenna in car navigation

Installed on the roof of a car, a plate of the car antenna is suction-type, and the antenna base can be supported by a thin cloth, and the porcelain on the roof can be protected by magnets. Add an antenna! And there is a very important problem, the problem of satellite signals. If you want to open this, you need to pay a fee, which is about 100 yuan per year.