A Dual-Layer Radar Absorbing Material With Fully Embedded Square-Holes Frequency Selective Surface

作者：Wang, Qiang; Tang, Xiu-Zhi^*; Zhou, Ding; Du, Zuojuan; Huang, Xiaozhong^*

来源：IEEE Antennas and Wireless Propagation Letters, 2017, 16: 3200-3203.

DOI：10.1109/LAWP.2017.2768441

• Frequency selective surface (FSS)
• holes
• radar absorbing material (RAM)

A dual-layer radar absorbing material composed of a square-hole dielectric (SHD) layer and an integrated absorbing layer that contains a square-hole frequency selective surface (SHFSS) was designed and fabricated. The obtained materials exhibited two absorption peaks with their reflection loss below -10 dB in 7.74-18 GHz. The detailed simulations and impedance analysis revealed how these peaks were produced and how their absorbing intensities can be enhanced. The power loss density, and electric-and magnetic-field distributions were proposed to explain the resonance mechanisms of the two peaks. It is concluded that the frequency depends on the dimensions of both SHD and cross-shaped wires on SHFSS, suggesting that the variation in 2-9.2 and 9.2-18 GHz is essentially independent. Notably, compared to the pure carbonyl iron powder absorbent, the average absorption intensities observed in the current materials with designed structure increased by 45.8% in 7.74-18 GHz, and the volume fraction of absorbent decreased to 56.1%.

• 出版日期2017
• 单位中南大学