Optically driven antenna
US7911395B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 29, 2007 |
| Grant date | Mar 22, 2011 |
| Priority date | — |
| Expiry date | Apr 25, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q15/148
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
There is provided an optically driven, transmitting and receiving antenna transformable into an electrically invisible antenna when inactive, including a light source, a semiconductor wafer illuminatable by the light source and a microwave source or sensor. The wafer has a surface for forming optically induced plasma or electron hole concentration, assuming a spatial and temporal pattern defined by a light beam impinging thereon. Upon the wafer being exposed to the light beam having a power level sufficient for creating a dense plasma or electron hole concentration in the wafer, the wafer becomes reflective to microwaves, and returns to transparency when light from the light source is turned off.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.