Excitation slot type cavity antenna

The utility model provides an excitation slot type cavity antenna. The excitation slot type cavity antenna comprises a cavity; the resonance element is arranged at a cavity opening of the cavity, the resonance element is provided with a closed slot hole, an open slot hole, a metal radiation part and a grounding part, a feed-in point is arranged above the closed slot hole, and the closed slot hole is divided into a slot hole first radiation part and a slot hole second radiation part by the feed-in point; a slotted hole is formed in one side of the resonance element above the slotted hole second radiation part; the metal radiation part is metal around the open slot and the closed slot; the grounding part is located below the closed slot hole, is electrically connected with the cavity, and generates a resonance mode with the cavity by exciting the closed slot hole and the metal radiation part. According to the utility model, the slot first radiation part, the slot second radiation part and the metal radiation pa