Antireflective Coating: Sugar-based Carbon Hollow Spheres That Mimic Moth Eyes
http://www.sciencedaily.com/releases...0105223546.htmThe new material cuts down reflections from microwaves rather than from visible light -- invisible energy from a different part of the energy spectrum. Blocking microwave reflection is an important application for precise microwave measurements, and the coating may be used as a radar absorbing material in stealth technology, a technique that makes make an airplane invisible to radar, or police traffic radar that uses microwaves to measure car speed.
Described this week in the journal Applied Physics Letters from AIP Publishing, the new technology is based on a monolayer of hollow carbon spheres packed in two dimensions and has been demonstrated to be able to achieve almost perfect microwave absorption, i.e. near 100 percent absorption of microwaves in the Ka-band (26-37 gigahertz) frequency range, the first antireflective material to achieve this.
Would change things somewhat for military aircraft if it proved to be a practical RAM, wouldn't it?