| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electromagnetic wave absorber unlike a conventional electromagnetic wave absorber having a problem in that it is almost impossible for the conventional electromagnetic wave absorber to absorb electromagnetic waves in a frequency band of 3 to 30 GHz, particularly in a frequency band of centimeter waves of 5.8 GHz, whereby electronic devices using that frequency range, such as an ETC, are caused to malfunction, and other types of electronic devices and human bodies are affected. <P>SOLUTION: The electromagnetic wave absorber is a composite body formed of an electromagnetic wave absorbing sheet having a complex dielectric constant measured by the coaxial tube method in which its real part (ε') has a range of 18.0<ε'<24.0 and its imaginary part (ε") has a range of 3.0<ε"<8.0, and a sheet material having a complex dielectric constant measured by the coaxial tube method in which its real part (ε") has a range of 2.0<ε'<3.0 and its imaginary part (ε") has a range of 0.2<ε<0.4. The electromagnetic wave absorbing sheet is a rubber electromagnetic wave absorbing sheet in which carbon nano-tubes are dispersed in silicone rubber. <P>COPYRIGHT: (C)2012,JPO&INPIT |
