Symmetric ultra-wideband omni-directional antenna

The invention discloses a symmetric ultra-wideband omni-directional antenna which relates to ultra-wideband omni-directional antennas and solves the problems of the existing ultra-wideband omni-directional antenna in insufficient broadband index and unstable E plane main radiation direction. According to the symmetric ultra-wideband omni-directional antenna, a first quarter of wafer is vertically connected with a first circular arc as a whole and is located in the same plane with the first circular arc; the tail end of the circular arc of the first quarter of wafer is connected with the head end of the first circular arc located at the same side; a plurality of first metal discs are uniformly arranged by taking the vertical side as the center; a second quarter of wafer is vertically connected with a second circular arc as a whole and is located in the same plane with the second circular arc; the tail end of the circular arc of the second quarter of wafer is connected with the head end of the second circular a