Folding antenna, antenna group and cerebral hemorrhage detection method based on folding antenna group

The invention provides a folded antenna, an antenna group and a cerebral hemorrhage detection method based on the folded antenna group, and relates to the technical field of antennae, the folded antenna comprises a coaxial feeder line, a first radiation sheet, a second radiation sheet, a third radiation sheet, a short circuit wall, a first metal floor, a second metal floor and a third metal floor; the first radiation sheet and the second radiation sheet are vertically connected to form an L-shaped structure, and the coaxial feeder line and the L-shaped radiation sheet are combined to form a folding feed structure; the second radiation sheet is vertically connected with the third radiation sheet, so that the first radiation sheet, the second radiation sheet and the third radiation sheet form a U-shaped structure; the U-shaped structure and the first metal floor form a loop through the short circuit wall and the coaxial feeder line, the first metal floor is vertically connected with the second metal floor, and