An Absorbing-Through Integrated Frequency Selctive Surface with Broadband Absorption and Angel Stabilization

With the rapid development of modern reconnaissance technology, radomes designed with traditional frequency selective surfaces can no longer meet the stealth requirements of the antenna system. In order to further improve the ability of the radome to reduce multi-station RCS, the frequency selective surface is combined with the circuit simulation absorber to design a structure with both wave absorption and wave transmission functions. This paper achieves structural miniaturization through zigzag design, improves the selectivity of the structure through a two-layer bandpass frequency selective surface cascade, and improves the angular stability of the structure through the design of replacing straight lines with curves. The simulation results show that the structure designed in this paper satisfies <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">|S₂₁| ></tex> -1dB in the 8.7GHz∼10.4GHz frequency band and has good transmission characteristics; it satisfies <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">|S₁₁| <-10dB</tex> and <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">|S₂₁| <-10dB</tex> in the 6.0GHz∼8.3GHz and 11.0GHz∼12.7GHz frequency bands, and has bilateral broadband wave absorption characteristics; and the entire structure has good angular stability within the incident angle range of 0 to 30°.