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US 6,661,368 B1Granted
Control of reflected electromagnetic fields at an IFSAR antenna
AssigneeSandia Corporation
InventorsSteven E. Allen, Billy C. Brock
Life of this patent
Estimating the term…
Abstract
A system for reducing multi-path reflections from adjacent metal objects which cause distortion in an IFSAR includes a reflective cone extending between the top of the IFSAR and the skin of its aircraft, and a reflective shroud surrounding the IFSAR. Each of these components may be coated with radar absorbing material.
Claims20
A system for reducing phase errors from scattering in an IFSAR system comprising:
- an IFSAR antenna system having a reflective surface for focusing energy along a collimated beam and a feedhorn at a focal point of said reflective surface for receiving reflected energy from said surface;
- and
- a shroud made of radar reflective material extending around the reflective surface, said shroud shielding said surface from reflected energy from objects adjacent said surface and not along said beam.
A system for reducing phase errors from scattering in an IFSAR system comprising:
- an IFSAR antenna for focusing energy along a collimated beam, said antenna being mounted adjacent the metal skin of an aircraft;
- and
- a truncated electrically conductive cone having a larger diameter end affixed to said metal skin and a smaller end surrounding said IFSAR antenna, said beam extending outside said smaller diameter end of said cone.
Dependencies are inferred from the claim text.