Compact microwave and millimeter wave radar
AssigneeMillitech Corporation
InventorsG. Richard Huguenin, Ellen L. Moore
Life of this patent
Estimating the term…
Abstract
Compact microwave and millimeter wave radars operating at 77 Ghz and having resolution of no less than 3.2 meters at a distance of 100 meters. The exemplary dimensions of the radars are 145 millimeters in diameter and 100 or 85 millimeters long. The antenna of the radars employs folded optic design, with the actual focal length of the radar being less than that of the lens in the antenna alone.
Claims38
An antenna for directing electromagnetic radiation to or from a radiation source or detector comprising:
- a biconvex lens for focusing such electromagnetic radiation and defining an axis of the antenna;
- a transreflector in a plane orthogonal to and disposed on said axis at a first distance from the lens;
- and
- a twistreflector substantially in a plane orthogonal to and disposed on said axis at a second distance greater than said first distance from the lens such that the far field along the axis is focused at a point near the intersection of the twistreflector and the axis, which point is closer to the lens than the focal point of the lens alone.
An antenna for directing electromagnetic radiation to or from a radiation source or detector comprising:
- a zoned lens for focusing such electromagnetic radiation and defining an axis of the antenna;
- a transreflector in a plane orthogonal to and disposed on said axis at a first distance from the lens;
- and
- a twistreflector substantially in a plane orthogonal to and disposed on said axis at a second distance greater than said first distance from the lens such that the far field along the axis is focused at a point near the intersection of the twistreflector and the axis, which point is closer to the lens than the focal point of the lens alone.
An antenna for directing electromagnetic radiation to or from a radiation source or detector comprising:
- a zoned plate for focusing such electromagnetic radiation and defining an axis of the antenna;
- a transreflector in a plane orthogonal to and disposed on said axis at a first distance from the plate;
- and
- a twistreflector substantially in a plane orthogonal to and disposed on said axis at a second distance greater than said first distance from the plate such that the far field along the axis is focused at a point near the intersection of the twistreflector and the axis, which point is closer to the plate than the focal point of the plate alone.
An antenna for directing electromagnetic radiation to or from a radiation source or detector comprising:
- a Fresnel lens for focusing such electromagnetic radiation and defining an axis of the antenna;
- a transreflector in a plane orthogonal to and disposed on said axis at a first distance from the lens;
- and
- a twistreflector substantially in a plane orthogonal to and disposed on said axis at a second distance greater than said first distance from the lens such that the far field along the axis is focused at a point near the intersection of the twistreflector and the axis, which point is closer to the lens than the focal point of the lens alone.
A compact microwave and millimeter wave radar for emitting and receiving electromagnetic radiation comprising:
- an antenna comprising:
- a biconvex lens for focusing such electromagnetic radiation and defining an axis of the antenna,
- a transreflector in a plane orthogonal to and disposed on said axis at a first distance from the lens,
- a twistreflector substantially in a plane orthogonal to and disposed on said axis at a second distance greater than said first distance from the lens such that the far field along the axis is focused at a point near the intersection of the twistreflector and the axis, which point is closer to the lens than the focal point of the lens alone,
- RF circuit means for generating and receiving the electromagnetic radiation;
- and
- means for coupling the EM radiation from the RF circuit means to the antenna, and for coupling EM radiation from the antenna to the RF circuit means.
A compact microwave and millimeter wave radar for emitting and receiving electromagnetic radiation comprising:
- an antenna comprising:
- a zoned lens for focusing such electromagnetic radiation and defining an axis of the antenna,
- a transreflector in a plane orthogonal to and disposed on said axis at a first distance from the lens,
- a twistreflector substantially in a plane orthogonal to and disposed on said axis at a second distance greater than said first distance from the lens such that the far field along the axis is focused at a point near the intersection of the twistreflector and the axis, which point is closer to the lens than the focal point of the lens alone,
- RF circuit means for generating and receiving the electromagnetic radiation;
- and
- means for coupling the EM radiation from the RF circuit means to the antenna, and for coupling EM radiation from the antenna to the RF circuit means.
A compact microwave and millimeter wave radar for emitting and receiving electromagnetic radiation comprising:
- an antenna comprising:
- a zoned plate for focusing such electromagnetic radiation and defining an axis of the antenna,
- a transreflector in a plane orthogonal to and disposed on said axis at a first distance from the plate,
- a twistreflector substantially in a plane orthogonal to and disposed on said axis at a second distance greater than said first distance from the plate Such that the far field along the axis is focused at a point near the intersection of the twistreflector and the axis, which point is closer to the plate than the focal point of the plate alone,
- RF circuit means for generating and receiving the electromagnetic radiation;
- and
- means for coupling the EM radiation from the RF circuit means to the antenna, and for coupling EM radiation from the antenna to the RF circuit means.
A compact microwave and millimeter wave radar for emitting and receiving electromagnetic radiation comprising:
- an antenna comprising:
- a Fresnel lens for focusing such electromagnetic radiation and defining an axis of the antenna,
- a transreflector in a plane orthogonal to and disposed on said axis at a first distance from the lens,
- a twistreflector substantially in a plane orthogonal to and disposed on said axis at a second distance greater than said first distance from the lens such that the far field along the axis is focused at a point near the intersection of the twistreflector and the axis, which point is closer to the lens than the focal point of the lens alone,
- RF circuit means for generating and receiving the electromagnetic radiation;
- and
- means for coupling the EM radiation from the RF circuit means to the antenna, and for coupling EM radiation from the antenna to the RF circuit means.
Dependencies are inferred from the claim text.