Patent ID: 7911395
Filing Date: 2011-03-22
Classification: H01Q

Abstract:
1. An optically driven, transmitting and receiving antenna-mirror, transformable into an electrically invisible antenna-mirror, when inactive, comprising: a light source for producing a light beam; at least one semiconductor mirror-wafer, illuminatable by said light beam; a microwave source or a microwave sensor; a microwave absorbing enclosure, enclosing said light source and said microwave source, having a window for microwave transmission therethrough; said wafer having a surface for forming optically induced plasma or electron hole concentration, assuming a spatial and temporal pattern defined by a light beam impinging thereon; wherein, upon said wafer being exposed to the light beam having a power level sufficient for creating a dense plasma or electron hole concentration in said wafer, said wafer becomes reflective to microwaves, and returns to transparency when light from said light source is turned off.