Radar reflectors

Details Radar reflectors Radar reflectors

H - Electricity

01

Q

H01Q 15/14 (2006.01) G01S 7/02 (2006.01) H01Q 15/18 (2006.01) H01Q 15/23 (2006.01)

Patent

CA 2113724

A radar reflector comprises a pair of opposed colinear solid dielectric lens reflectors (10) and two corner reflectors (11) be- tween to provide substantially uniform and high reflectivity in the plane of the reflector elements. Radar energy strikes the outer convex surface of a first converging lens element (12) of relatively high dielectric constant and is then transmitted through a sec- ond lens element (17) of material having a relatively lower dielectric constant to a reflecting metallic coating (18) on the outer con- vex surface of the second lens element (17). The surfaces of the two lens elements (13, 14, 18) are formed such that their respective radii of curvature decrease with distance from the axis of symmetry (15). The first lens (12) is preferably silica flour in a polyester resin with a dielectric constant substantially equal to 3.4 while the second lens element (17) is an expanded foam polystyrene with a dielectric constant substantially equal to 2. Preferably the corner reflectors (11) are trihedral reflectors.

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