Broadband frequency selection wave absorber with double passbands

The broadband frequency selection wave absorber comprises a loss layer and a transmission layer which are sequentially arranged from top to bottom, and a gap is formed between the loss layer and the transmission layer; the loss layer comprises a square-ring metal patch, T-shaped metal patches, a folded square-ring metal patch, a Jerusalem cross-shaped metal patch and a first dielectric plate, the square-ring metal patch is located at the center of the upper surface of the first dielectric plate, the outer surface of the square-ring metal patch is electrically connected with the four T-shaped metal patches, the T-shaped metal patches are electrically connected with resistor elements in the forward direction, and the resistor elements are electrically connected with the T-shaped metal patches in the forward direction. The inner side of the square-ring metal patch is surrounded by the folded square-ring metal patch, and the Jerusalem cross-shaped metal patch is located at the central position of the lower surfac