Radio wave absorber
US6771204B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jan 28, 2003 |
| Grant date | Aug 3, 2004 |
| Priority date | — |
| Expiry date | Jan 28, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q17/008
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A radio wave absorber unit includes two or more molded bodies in a pyramid or wedge shape whose radius at the tip end is from 0.5 mm to 7.5 mm and a base. A radius at the trough between adjacent molded bodies is 7.5 mm or less. A unit including molded bodies and the base is integrally formed from propylene-based conductive expanded beads. The bases of adjacent units are connected by fitting their recessed and raised portions to each other. The expanded bead size is in the range from 2 mm to 10 mm, and beads with two or more different bead diameters can be used. A hollow molded body can be formed by providing a hollow structure inside.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.