Band-pass filter based on three-layer metal plate structure

The invention discloses a band-pass filter based on a three-layer metal plate structure. The structure comprises three layers of metal plates, a first conductor component and a second conductor component. The three layers of metal plates include the first metal plate, the second metal plate and the third metal plate which are sequentially arranged from bottom to top, the left ends of the three layers of metal plates are fixed through a fourth metal plate, the right ends of the three layers of metal plates are fixed through a fifth metal plate, gaps exist between the three layers of metal plates, the second metal plate is provided with slot lines, and the three layers of metal plates are fixed together near the slot lines through metal blocks; the first conductor component is disposed on the fourth metal plate and connected with the left end of the second metal plate, and the second conductor component is arranged on the fifth metal plate and connected with the right end of the second metal plate. The metal pl