Chin. Phys. B ›› 2013, Vol. 22 ›› Issue (4): 44101-044101.doi: 10.1088/1674-1056/22/4/044101
• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇 下一篇
郭绍丽, 王六定, 王一明, 吴宏景, 沈中元
Guo Shao-Li (郭绍丽), Wang Liu-Ding (王六定), Wang Yi-Ming (王一明), Wu Hong-Jing (吴宏景), Shen Zhong-Yuan (沈中元)
摘要: Ordered mesoporous carbon (OMC) and metal-doped (M-doped) OMC composites are prepared and their electromagnetic (EM) parameters are measured. Using the measured EM parameters we calculate the EM wave absorption properties of double-layer absorber which is composed of OMC as an absorbing layer and M-doped OMC for matching layer. The calculated results show that the EM wave absorption performance of OMC/OMC-Co (2.2 mm/2.1 mm) is improved remarkably. The obtained effective absorption bandwidth is up to 10.3 GHz and the minimum reflection loss reaches -47.6 dB at 14.3 GHz. The enhanced absorption property of OMC/OMC-Co can be attributed to the impedance match between air and absorber. Moreover, it can be found that for the absorber with given matching layer, larger value of Δ tanδε (=tan δε absorbing -tan δε matching) can induce better absorption performance, indicating the impedance difference between absorbing layer and matching layer plays an important role in improving the absorption property of double-layer absorber.
中图分类号: (Magnetostatics; magnetic shielding, magnetic induction, boundary-value problems)