Millimeter Wave Imaging System
AssigneeRafael-Armament Development Authority Ltd.
InventorYonatan Noyman
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Abstract
An imaging system operative in a frequency range starting from X band and including the terahertz region has a receiving antenna having a spheroidal reflector. One or more arrays of detectors disposed at the focus adjacent to the reflector of the receiving antenna provides for imaging targets within a range of a few meters around the second focus of the spheroidal reflector Images of targets such as of concealed objects under clothing are generated and displayed as is known in the art. A method for manufacturing reflectors of receiving antennae given a detection range and a focal range is provided.
Claims6
An imaging system operative in a range of electromagnetic frequencies starting from X band and including the terahertz region, said imaging system comprising at least a receiving antenna having a spheroidal reflector, where a and b are the lengths of the major and minor axes of said spheroid respectively, and whereby said axes of said spheroid conform with the equations:
- a≈L/2,
- b=√{square root over (fL(1−f/L))}, where
- L is the detection range of said imaging system and f is the focal length of said spheroid.
A method for manufacturing a spheroidal reflector for a receiving antenna of an imaging system operative in a range of frequencies starting from X band and including the terahertz region, said method comprising:
- a. selecting a detection range and a focal length for said imaging system;
- b. selecting the axes of said spheroid to conform with the equations:
- a=L/2, and
- b=√{square root over (fL(1−f/L))}, where
- a and b are the lengths of the major and minor axes of said spheroid respectively, f is said focal length, and L is said detection range.
Dependencies are inferred from the claim text.