Design of An Integrated Frequency Selective Surface Structure for Wave Transmission and Stealth

Frequency selective surface (FSS) is widely used in radar stealth radomes because of its excellent integrated function of wave transmission and stealth. In this paper, the characteristics of high-frequency broadband transmission and low-frequency broadband absorption are realized through the cascade structure design of lossy layer frequency selective surface and lossless layer bandpass frequency selective surface loaded with lumped resistance devices. The lossy layer frequency selection surface is a six-sided ring branch loaded lumped resistor device structure, and the lossless layer bandpass frequency selection surface is a six-sided slot structure. Full-wave simulation shows that the reflection coefficient of the structure is less than - 10dB in the frequency range of 3.9GHz-15.5GHz, and it can cover C-band, X-band and some Ku-band. The insertion loss of the structure is less than 1 dB, and the frequency band range is 24.77GHz-30.9GHz. At the same time, the structure has good polarization stability. The structure can be widely used in satellite communication radar radomes equipped with carrier platforms.