Planar metal Fresnel millimeter-wave lens

Patent metadata

Field	Value
Publication number	US-11870148-B2
Application number	US-202117524644-A
Country	US
Kind code	B2
Filing date	Nov 11, 2021
Priority date	Nov 11, 2021
Publication date	Jan 9, 2024
Grant date	Jan 9, 2024

Abstract

A planar conductive millimeter-wave lens includes: a planar conductive plate with a first surface and a second surface, wherein the first surface is parallel to the second surface; a plurality of openings from the first surface through the planar conductive plate to the second surface, where an axis of each opening is perpendicular to the first surface and the second surface. A size of each opening is a function of a position of said each opening on the planar conductive plate such that an insertion phase collectively imposed by the openings on an incident wave causes the incident wave to pass through the first surface and the planar conductive plate, exit from the second surface and to focus at a predetermined distance from the second surface.

First claim

The invention claimed is:

1. A planar conductive millimeter-wave lens comprising:
a single planar conductive plate with a first surface and a second surface, wherein the first surface is parallel to the second surface;
a plurality of openings from the first surface through the planar conductive plate to the second surface, wherein an axis of each opening is perpendicular to the first surface and the second surface, wherein a size of each opening is a function of a position of said each opening on the planar conductive plate such that an insertion phase collectively imposed by the openings on an incident wave causes the incident wave to pass through the first surface of the single planar conductive plate, exit from the second surface and to focus at a predetermined distance from the second surface, without passing through another conductive plate.

2. The planar conductive millimeter-wave lens of claim 1 , wherein the openings are arranged in the planar conductive plate in an equilateral triangular pattern.

3. The planar conductive millimeter-wave lens of claim 1 , wherein the openings are arranged in the planar conductive plate in a rectangular, square or circular pattern.

4. The planar conductive millimeter-wave lens of claim 1 , wherein a shape of the plurality of openings is circular.

5. The planar conductive millimeter-wave lens of claim 1 , wherein a shape of the plurality of openings is hexagonal.

6. The planar conductive millimeter-wave lens of claim 1 , wherein the planar conductive plate comprises of a dielectric material coated with a conductive material.

7. The planar conductive millimeter-wave lens of claim 6 , wherein the conductive material is aluminum, copper, silver, or gold.

8. The planar conductive millimeter-wave lens of claim 1 , wherein the conductive plate is a solid metal plate.

9. The planar conductive millimeter-wave lens of claim 8 , wherein the solid metal plate is aluminum, titanium or stainless steel.

10. The planar conductive millimeter-wave lens of claim 1 , wherein the planar conductive millimeter-wave lens is a Fresnel lens.

Assignees

• Raytheon Co

Inventors

• Crouch David D
• Kazemi Hooman
• Brailovsky Alexander Borisovich

Classifications

• H01Q19/065 Primary

  Zone plate type antennas · CPC title

• H01Q1/38

  formed by a conductive layer on an insulating support {(patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface  H01Q15/142)} · CPC title

• H01Q15/04

  comprising wave-guiding channel or channels bounded by effective conductive surfaces substantially perpendicular to the electric vector of the wave, e.g. parallel-plate waveguide lens · CPC title