Automobile antenna

The utility model provides an automobile antenna. This automobile antenna includes: the base plate, first the serving of the first face of base plate is provided with an irradiator, one side of irradiator is connected with input impedance and matches the feeder, the irradiator with input impedance matches the feeder and follows the length direction of base plate sets up, just input impedance matches the feeder and extends to the second end of the first face of base plate, the both sides that input impedance matches the feeder are provided with first trapped wave portion, first trapped wave portion includes: two trapped wave T type bodies that have the same shape, the setting of trapped wave T type body symmetry is in input impedance matches the both sides of feeder, the ground connection portion that is provided with on the second face of base plate, be provided with second trapped wave portion in the ground connection portion, wherein, first face with the second face does the two sides that the base plate is