Cross-shaped omnidirectional radiation lightweight antenna

The invention discloses a cross-shaped omnidirectional radiation light weight antenna. The antenna comprises an antenna main radiation unit, a resonant cavity and a feed network circuit board, the antenna main radiation unit comprises a PCB, a cross-shaped patch oscillator is arranged on the upper surface of the PCB, and an adjusting branch knot correspondingly connected with the cross-shaped patch oscillator is arranged on the lower surface of the PCB; the upper surface of the feed network circuit board is a grounding plate, the lower surface of the feed network circuit board is provided witha feed network circuit, branch ports of the feed network circuit are connected with feed points of the cross-shaped patch oscillators in a one-to-one correspondence mode, and the resonant cavities are located below the PCB and fixedly connected to the grounding plate. The antenna provided by the utility model has the comprehensive performances of high gain, wide wave beam, wide frequency band, stable phase center, strong