Apparatus for reducing scattering and methods of using and making same

Patent metadata

Field	Value
Publication number	US-9831560-B2
Application number	US-201414448711-A
Country	US
Kind code	B2
Filing date	Jul 31, 2014
Priority date	Jul 31, 2014
Publication date	Nov 28, 2017
Grant date	Nov 28, 2017

Abstract

An apparatus for reducing electromagnetic scattering includes a first component having a plurality of curved segments, each including a first reflective material, and together forming an enclosed cavity; and a second component having a plurality of flat or cylindrically-curved segments, each comprising a second reflective material. The second component is positioned external to the cavity.

First claim

What is claimed:

1. An apparatus for reducing electromagnetic scattering, comprising:
a first component including a plurality of curved segments, each including a first reflective material, and together forming an enclosed cavity; and
a second component including a plurality of flat or cylindrically-curved segments, each including a second reflective material, wherein the second component is positioned external to the enclosed cavity;
wherein a first curved segment of the plurality of curved segments is configured to focus a plurality of incident signal waves on a focal point of a first flat or cylindrically-curved segment of the plurality of flat or cylindrically-curved segments; and
wherein the first flat or cylindrically-curved segment is configured to redirect the focused waves from the focal point onto a second curved segment of the plurality of curved segments.

2. The apparatus of claim 1 , wherein the plurality of curved segments is a plurality of parabolically-curved segments.

3. The apparatus of claim 1 , wherein both the first and second components are rotationally invariant.

4. The apparatus of claim 1 , wherein the first component includes four curved segments.

5. The apparatus of claim 1 , wherein the first component is symmetric about two different planes.

6. The apparatus of claim 1 , wherein the first and second components are configured to reduce scattering of a signal, wherein the signal includes electromagnetic radiation.

7. The apparatus of claim 1 , wherein each of the plurality of curved segments is rotationally invariant about an axis of revolution, and wherein the flat or cylindrically-curved segments are cylindrically-curved segments concentric to the axis of revolution.

8. The apparatus of claim 1 , wherein the apparatus is configured to receive an incident electromagnetic wave having a first impact parameter and provide an exiting electromagnetic wave having a second impact parameter, wherein the second impact parameter is greater than 90% of the first impact parameter and less than 110% of the first impact parameter.

9. An apparatus for reducing electromagnetic scattering, comprising:
a first component including a plurality of curved segments, each including a first reflective material, and together forming an enclosed cavity; and
a second component including a plurality of flat or cylindrically-curved segments, each including a second reflective material, wherein the second component is positioned external to the enclosed cavity;
wherein a first curved segment of the plurality of curved segments is configured to focus a first portion of an incident plane wave on a focal point of a first flat or cylindrically-curved segment of the plurality of flat or cylindrically-curved segments;
wherein the first flat or cylindrically-curved segment is configured to redirect the focused waves from the focal point onto a second curved segment of the plurality of curved segments; and
wherein the second curved segment is configured to expand the redirected and focused waves into a first portion of a plane wave exiting the apparatus.

10. The apparatus of claim 9 , wherein a third curved segment of the plurality curved segments is configured to focus a second portion of the incident plane wave on a focal point of a second flat or cylindrically-curved segment of the plurality of flat or cylindrically-curved segments;
wherein the second flat or cylindrically-curved segment is configured redirect the focused waves from the focal point onto a fourth curved segment of the plurality of curved segments; and
wherein the fourth curved segment is configured to expand the redirected and focused waves into a second portion of the plane wave exiting the apparatus.

Assignees

• Elwha Llc

Inventors

• Driscoll Tom
• Smith David R
• Urzhumov Yaroslav A

Classifications

• H01Q15/14 Primary

  Reflecting surfaces; Equivalent structures {(electromagnetic shields H01Q1/526)} · CPC title

• H01Q1/528

  reducing the re-radiation of a support structure (in a parabolic reflector antenna H01Q19/023) · CPC title