An antenna system mounted on a vehicle according to the present invention comprises: a first antenna comprising a plurality of conductive members and operating as a radiator in a first frequency band; and a second antenna disposed in the antenna system separate from the first antenna, and operating in a second frequency band higher than the first frequency band. The first antenna may include a loop antenna configured in a loop shape to surround the plurality of conductive members such that signals from the plurality of conductive members are coupled.