The invention discloses a 5G full-band vehicle-mounted antenna based on a tight
coupling technology. The 5G full-band vehicle-mounted antenna comprises an antenna shell similar to a shark fin, and the antenna shell is installed on the top of an automobile, provided with a front screw hole and a rear screw hole, and is small in size and convenient to install; the rectangular base is used for bearing the
microstrip antenna plate, the rectangular base is made of a
copper sheet plate, the length of the long side of the rectangular base is equal to that of the
microstrip antenna plate, and a grounded structure is constructed for the
microstrip antenna plate; the
microstrip antenna board is used for receiving and transmitting signals in a 5G full
frequency band (namely from a
low frequency band 617MHz-960MHz to a
high frequency band 1710MHz-5000MHz), the
microstrip antenna board is characterized by comprising three parts, namely a structure for realizing tight
coupling by digging a hole in the middle, a structure for expanding the bandwidth of the antenna by grounding a patch extension line
branch knot and a feeding point, and the whole
microstrip antenna board is an FR-4
glass fiber board and is erected in the middle of a rectangular base. According to the 5G full-band vehicle-mounted antenna, a structure with a hole dug in the middle is adopted to achieve the effect that the
antenna bandwidth is widened through the tight
coupling technology, and the
antenna efficiency can reach 90% or above through a direct
feeding mode.