Radio wave absorber and production method thereof
US6870497B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 4, 2004 |
| Grant date | Mar 22, 2005 |
| Priority date | — |
| Expiry date | Aug 4, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q17/004
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A radio wave absorber is provided which can be produced at a low cost compared to the case of using silicon carbide fiber and which is also superior in radio wave absorption property in 76 GHz band (75-77 GHz frequency band). The radio wave absorber is produced by arranging a radio wave absorbing layer onto the surface of a metal body. The radio wave absorbing layer is made of a radio wave absorbing material containing silicon carbide powder dispersed in matrix resin. Average particle diameter of the silicon carbide powder is 4-40 μm. Silicon carbide powder content in the radio wave absorbing material is 15-45 volume %. Thickness of the radio wave absorbing layer is adjusted so that reflection attenuation of not less than 10 dB is provided in 76 GHz band.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.