砷化镓太阳电池表面高透光率吸波材料结构设计与性能研究

Structure design and performance of high light transmittance and electromagnetic transparent materials attached onto GaAs solar cell

文章以卫星砷化镓太阳电池阵在X波段雷达波下的隐身性为研究背景,针对电池阵高透光率与其对电磁波高吸收率的兼容要求,选择碳纳米管薄膜材料建立人工亚波长吸波结构,通过调整其亚波长结构参数及碳纳米管薄膜材料的费米能级等参数,拓展吸波带宽。同时研究发现,在砷化镓太阳电池表面构建双层十字微结构,相比单层结构,材料的吸收带宽更宽,吸波体在8.2～10.3 GHz频率范围内反射率小于-10 dB,相对带宽达到23%。

In this paper,the stealth property of GaAs solar cells used in satellite under X-band radar wave is investigated.In order to achieve a high light transmittance and a high absorption rate of the electromagnetic wave jointly,the carbon nanotube film materials are selected to build an artificial subwavelength absorbing structure.By adjusting the structural parameters and the Fermi energy level of the carbon nanotube membrane materials,the electromagnetic wave absorption band can be broadened.Further study also shows that the two-layers of an artificial subwavelength absorbing structure perform much better than the one-layer structure in terms of the electromagnetic wave absorption bandwidth.The reflectivity is less than-10 dB in the range of 8.2 GHz to 0.3 GHz,with a relative expansion of bandwidth as high as 23%.