The antenna is an external car four-in-one antenna. The antenna is highly integrated which integrates the LTE communication antenna system and the navigation information receiving system and the radio signal receiving system. The LTE communication system is composed of two parts, including a main antenna and a diversity antenna. The high integration degree can realize platform production and reduce the production cost. At the same time, the antenna design has the characteristics of high isolation. The antenna has passed the global common functional testing, GM depot high standard EMC testing. The structure of the antenna is compact, fashion and easy.