Dual band antenna

The present disclosure provides a dual-frequency antenna and an electronic device thereof. The dual-frequency antenna includes a feeding end, the ring-shaped connecting end has an opening, and the ring-shaped connecting end is connected to the feeding end. The threaded head of the metal screw passes through the opening, so that the metal screw is electrically connected to the ring-shaped connecting end, the first extension path is connected to the feeding end, the second extension path is connected to the first extension path, and the third extension path is connected to the second extension path, the grounding part is connected to the third extension path. Wherein the dual-frequency antenna of the present invention forms a monopole antenna and a loop antenna, so that the dual-frequency antenna forms a wide-band operating frequency band, the antenna frequency band goes widen, and allows the monopole antenna operates at 3.6GHz and the loop antenna operates at 4.6GHz, which can cover the frequency band required