Anti-stealth radar location - using plate lens of plastic or pigmented plastic spaced from antenna to give virtual gain

摘要

Plates doped or made of plastic, plastic with chemical pigments, or foils or films, or sintered plates are set up at a pacing, related to the wavelength used, in front of an antenna, or inside a waveguide. The lens effect causes a passive gain increment to allow location. The system may be used in waveguides in front of the receiver input, and in measuring apparatus. ADVANTAGE - Comparable with director on Yagi antenna, dence allows location where none would be possible, as long as lens material is loss-free.