Planar single-pole built-in antenna working in ultra high frequency (UHF) full band

The utility model relates to a built-in antenna, and provides a planar single-pole built-in antenna working in an ultra high frequency (UHF) full band, which comprises a printed circuit board (PCB) and a rectangular block-shaped metal plate used as an antenna radiating body, wherein the metal plate is welded on an antenna interface of the PCB; and one or multiple grooves arrayed in parallel at equal intervals are arranged on the metal plate. When the size of the PCB is 55 multiplied by 50 square millimeters, a groove of which the size is 47 multiplied by 2 multiplied by 0.5 cubic millimeters is arranged at one end of the metal plate. When multiple grooves are arranged on the metal plate, the distance between adjacent grooves is 3mm and two adjacent grooves are respectively arranged at two opposite ends of the metal plate in a staggered manner. The planar single-pole built-in antenna is applied to receivers and emitters of television signals, electronic devices of wireless communication equipment, and the like