Abstract: A radar altering structure comprises: a structure; and at least one layer of conductive material disposed at at least one surface of the structure, the layer comprising a plurality of conductive paths arranged in a specular pattern to reduce the radar cross section of the structure.

Abstract: An electrothermal deicing apparatus comprises: at least one heater conductor formed into a predetermined pattern for application to a structure, each conductor of the pattern coated with at least one layer of a material active to absorb electromagnetic energy, the pattern of the at least one coated heater conductor is operative to attenuate radar wave transmissions incident thereon to reduce the radar cross-section of the structure; and a heater controller coupled to the pattern of at least one coated heater conductor for controlling the deicing of the structure.

Abstract: Radar absorbing electrothermal deicing apparatus for use in deicing an airfoil surface comprises: a heater element including a predetermined area pattern of conductive metallic material; and a layer of radar absorbing material disposed over the heater element. In addition, a method of absorbing radar signals in an electrothermal deicer comprises the steps of: disposing an electrothermal deicing element at a surface of an airfoil; and disposing a layer of dielectric material comprising a filler of magnetic material over the electrothermal deicing element.

Abstract: A frame for a game racquet such as a tennis racquet is formed by winding a resin-free filament over a mandrel to form a tube, inserting the wound tube into a mold, and injecting resin into the mold.