Abstract: 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%.