Passive radar target

Details Passive radar target Passive radar target

H - Electricity

01

Q

343/64

H01Q 15/23 (2006.01)

Patent

CA 1297970

Abstract A passive radar target comprises a solid lens (50) of substantially uniform dielectric constant, having a reflecting surface (51) integrally formed therewith, the lens being constructed of particulate material having a dielectric constant selected such that radar waves striking the surface of the lens are focussed on the reflecting surfac.e In one form the particulate material comprises silica flour (91,101) contained within a thin radar transparant polycarbonate shell. The shell is formed of two similar halves (102,103) with a pressed aluminium reflective lining (92)106) in one half. By making the lens axially symmetrical such that the forward and rearward surfaces have a radius of curvature that decreases with distance from the transmitter. Two such lens-reflectors back-to-back will provide substantially omnidirectional operation. In an alternative arrangement back-to-back concave reflecting surfaces (114,115) are centrally located within a single spherical shell (117) filled with particulate material (116). In some applications a particulate filler such as powdered slate is held by means of a polyurethane foam.

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