| 摘要 |
PROBLEM TO BE SOLVED: To provide a cover for a millimeter wave radar which is configured with materials in which not only relative permittivity but also dielectric loss tangent are low and superior in millimeter wave transparency, and to provide a millimeter wave radar provided with the cover for the millimeter wave radar. SOLUTION: The cover for the millimeter wave radar is configured with a resin composition including thermoplastic resin (A) and alumina (B). The alumina (B) is desirable to be a spherical alumina particle. The thermoplastic resin (A) is desirable to be polycarbonate resin, or an alloy of polyphenylene ether resin and styrene resin. Since configuration is made with materials in which the relative permittivity and the dielectric loss tangent are suppressed to be low with sufficient balance, then reflection, absorption, and attenuation factor of the millimeter wave are remarkably low, and transmissivity of the millimeter wave is superior. COPYRIGHT: (C)2011,JPO&INPIT
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