Frequency selection structure with adjustable wave transmission frequency

The invention discloses a wave-transparent frequency adjustable frequency selection structure, which comprises m * n frequency selection units arranged according to an m-row n-column array mode, the frequency selection units in the same row are seamlessly spliced in sequence, and the frequency selection units in the same column are seamlessly spliced in sequence, each frequency selection unit comprises a variable capacitance diode, a first metal copper layer, a dielectric substrate layer and a second metal copper layer, the first metal copper layer, the dielectric substrate layer and the second metal copper layer are sequentially stacked from top to bottom, the dielectric substrate layer is provided with a vertically-through first rectangular groove, the first metal copper layer is attached to the upper surface of the dielectric substrate layer, and the second metal copper layer is attached to the lower surface of the dielectric substrate layer. The second metal copper layer is attached to the lower surface o