Resistive loop angular filter

An angular filter which attenuates electromagnetic energy of a wave incident upon and propagating through the filter, the attenuation being dependent upon the angle of the filter, said filter comprising:

• an array of resistive elements disposed parallel to a surface substantially normal to a direction of propagation of the electromagnetic wave;
• a dielectric support substantially transparent to the wave and being disposed along said surface, each of said elements being surrounded by said dielectric and being held in preset positions of said array by said support;
• and wherein
• each of said elements being electrically independent of the other elements, each of said elements comprising an electrically conductive member curved in a plane normal to said direction of propagation for interaction with the magnetic vector component of a portion of a wave having an axis of propagation angled relative to said direction of propagation, there being essentially no interaction between each of said elements and said magnetic vector for zero angle of incidence resulting in substantial transparency of said filter to electromagnetic waves incident at zero angle of incidence, said interaction with a consequent attenuation of the energy increasing with increasing angle of incidence.