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US 6,147,643 AGranted
Method to determine the error of orientational adjustment of the radiating face of an electronic scanning array antenna
AssigneeThomson-CSF
InventorsClaude Aubry, Valerie Lamy
Life of this patent
Estimating the term…
Abstract
In order to carry out the on-site determining of the error of orientational adjustment of an electronic scanning antenna, this error being due to defects of manufacture of the radiating face of this antenna, radioelectric measurements are used during the qualification of this antenna. These measurements are made for several directions of the antenna beam, and the most likely components of the aiming error are selected.
Claims6
A method of determining an aiming error for a scanning antenna, comprising:
- requesting said scanning antenna to be aimed in N aiming directions;
- measuring N actual directions with respect to a first reference system, said scanning antenna being actually aimed at said N actual directions and said first reference system being independent of said scanning antenna;
- calculating an orientation defect component of said aiming error by summing products between direction cosines of said N aiming directions and elementary rotations about axes of said first reference system, said direction cosines defining said N aiming directions with respect to a second reference system associated with said scanning antenna;
- defining a radioelectronic defect component of said aiming error as a random value independent from said N aiming directions;
- adding said orientation defect component to said radioelectronic defect component;
- and
- statistically solving for said elementary rotations.
4 more elements
Dependencies are inferred from the claim text.