公开(公告)号：US11656332B2

公开(公告)日：2023-05-23

申请号：US17818124

申请日：2022-08-08

Applicant: Fractal Antenna Systems, Inc.

Inventor： Nathan Cohen

IPC: G01S7/41 ,  G01S13/88 ,  G01N21/31 ,  G01N21/45

CPC classification number: G01S7/41 ,  G01N21/31 ,  G01N21/45 ,  G01S13/88

Abstract: Systems, apparatus, and methods are described that provide for detection of a metamaterial surface (metasurface) on a device or object. Multitone EM radiation is transmitted to the object having the metasurface. Two or more heterodyned tones are backscattered from the object and detected.

公开(公告)号：US11555907B2

公开(公告)日：2023-01-17

申请号：US17672071

申请日：2022-02-15

Applicant: Fractal Antenna Systems, Inc.

Inventor： Nathan Cohen ,  Alexander Shelman-Cohen

IPC: G01S13/06 ,  H01Q15/00 ,  G01S13/75 ,  B64G3/00 ,  B64G1/22

Abstract: Metamaterials are described which can be employed with satellites, e.g., small sats, to increase the observability of such satellites. Any type of suitable metamaterial can be used. In exemplary embodiments fractal-based patterns or structures may be used.

公开(公告)号：US20210123693A1

公开(公告)日：2021-04-29

申请号：US17122151

申请日：2020-12-15

Applicant: Fractal Antenna Systems, Inc.

Inventor： Nathan Cohen

IPC: F28F7/00 ,  H02J50/12 ,  G02B1/00 ,  H02J50/40 ,  F41H3/00 ,  H01Q17/00 ,  G02B5/00 ,  H01Q15/00 ,  H01Q1/36

Abstract: Systems according to the present disclosure provide one or more surfaces that function as power radiating surfaces for which at least a portion of the radiating surface includes or is composed of “fractal cells” placed sufficiently closed close together to one another so that a surface wave causes near replication of current present in one fractal cell in an adjacent fractal cell. The fractal cells may lie on a flat or curved sheet or layer and be composed in layers for wide bandwidth or multibandwidth transmission. The area of a surface and its number of fractals determines the gain relative to a single fractal cell. The boundary edges of the surface may be terminated resistively so as to not degrade the cell performance at the edges. The fractal plasmonic surfaces can be utilized to facilitate electrical conduction with lower ohmic resistance than would otherwise be possible in the absence of the fractal plasmonic surface(s) at the same temperature.

公开(公告)号：US10971294B2

公开(公告)日：2021-04-06

申请号：US16411654

申请日：2019-05-14

Applicant: Fractal Antenna Systems, Inc.

Inventor： Nathan Cohen

IPC: H01F3/00 ,  H01F27/10 ,  H01F3/10 ,  H01F7/06 ,  H01F7/20 ,  H01F41/071 ,  H02K3/04

Abstract: This invention entails the use of fractal shapes as cores for electromagnets, and a concurrent shape of a fractal for the windings which surround it. The novelty of this invention lies not only with the shaping, but the advantage of such shaping, which includes producing a smaller form factor electromagnet for the same desired magnetic field strength, when compared to a conventional electromagnet. It will be appreciated that a range of devices including electromagnets, based on such fractal shaping, are additionally novel and include but are not limited to solenoid switches, relays, and other devices in which the fractal electromagnets are used to make a change in state of some device.

公开(公告)号：US20200212587A1

公开(公告)日：2020-07-02

申请号：US16733116

申请日：2020-01-02

Applicant: Fractal Antenna Systems, Inc.

Inventor： Nathan Cohen

IPC: H01Q15/00 ,  H01Q1/52

Abstract: Metamaterials are described which can be employed with satellites, e.g., small sats, to increase the observability of such satellites. Any type of suitable metamaterial can be used. In exemplary embodiments fractal-based patterns or structures may be used.

公开(公告)号：US20200044353A1

公开(公告)日：2020-02-06

申请号：US16539695

申请日：2019-08-13

Applicant: Fractal Antenna Systems, Inc.

Inventor： Nathan Cohen ,  Ryan Thistle

IPC: H01Q15/00 ,  H01Q21/06 ,  G02B5/00 ,  H01Q19/30 ,  H01Q9/28

Abstract: Novel directional antennas are disclosed which utilize plasmonic surfaces (PS) that include or present an array of closely-spaced parasitic antennas, which may be referred to herein as “parasitic arrays” or fractal plasmonic arrays (FPAs). These plasmonic surfaces represent improved parasitic directional antennas relative to prior techniques and apparatus. Substrates can be used which are transparent and/or translucent.

公开(公告)号：US20190260133A1

公开(公告)日：2019-08-22

申请号：US16405340

申请日：2019-05-07

Applicant: Fractal Antenna Systems, Inc.

Inventor： Nathan Cohen

IPC: H01Q15/00 ,  H01Q1/44 ,  H01Q1/36 ,  H01Q1/28 ,  H01Q3/44 ,  H01Q19/00 ,  H02S99/00 ,  H01L31/042 ,  H01Q19/08

Abstract: Aspect of the present disclosure are directed to methods and apparatus producing enhanced radiation characteristics, e.g., wideband behavior, in or for antennas and related components by providing concentric sleeves, with air or dielectric material as a spacer, where the sleeves include one or more conductive layers, at least a portion of which includes fractal resonators closely spaced, in terms of wavelength. A further aspect of the present disclosure is directed to surfaces that include dual-use or multiple-use apertures. Such aperture engine surfaces can include a first layer of antenna arrays, a second layer including a metal-fractal backplane player, and a third layer including solar cells for solar cell or solar oriented power collection. Fractal metamaterial ribbons with multiple closely-packed fractal resonators are also disclosed.

公开(公告)号：US10381738B2

公开(公告)日：2019-08-13

申请号：US16006569

申请日：2018-06-12

Applicant: FRACTAL ANTENNA SYSTEMS, INC.

Inventor： Nathan Cohen ,  Ryan Thistle

IPC: H01Q15/02 ,  H01Q15/00 ,  H01Q19/06 ,  G02B1/00 ,  G02B5/00 ,  H01Q17/00 ,  H01Q21/20

Abstract: Novel directional antennas are disclosed which utilize fractal plasmonic surfaces (FPS) that include or present an array of closely-spaced parasitic antennas, which may be referred to herein as “parasitic arrays” or fractal plasmonic arrays (FPAs). These fractal plasmonic surfaces represent improved parasitic directional antennas relative to prior techniques and apparatus.

公开(公告)号：US20190128624A1

公开(公告)日：2019-05-02

申请号：US16168396

申请日：2018-10-23

Applicant: Fractal Antenna Systems, Inc.

Inventor： Nathan Cohen ,  Daniel Earle ,  Philip Salkind

IPC: F28F7/00 ,  H02J50/12 ,  G02B1/00 ,  G02B5/00 ,  H02J50/40 ,  F41H3/00 ,  H01Q17/00

Abstract: Systems and techniques are described that provide for enhanced gain and radiation characteristics of antennas. The systems and techniques employ layers or cards of fractal plasmonic surfaces to provide gain to the antennas. The fractal plasmonic surfaces each include a close-packed arrangements of resonators having self-similar or fractal shapes, which may be referred to as “fractal cells.” The cards can be held by a frame adapted to fit an antenna. The FPS cards can provide benefits for gain, field emission, directivity, increased bandwidth, power delivery, and/or heat management. One or more dielectric layers or cards may be used to enhance gain and/or directivity characteristics.

公开(公告)号：US20190109368A1

公开(公告)日：2019-04-11

申请号：US16214708

申请日：2018-12-10

Applicant: Fractal Antenna Systems, Inc.

Inventor： Nathan Cohen

IPC: H01Q1/27 ,  H01Q9/40

Abstract: Antennas, antenna systems, and communications devices are described that provide an antenna utilizing a fractal and/or self-similar conductive element that is novel and inventive in that its small in size and exhibits multiple-band or wideband frequency coverage which allows a miniature communications device incorporating the antenna to operate (e.g., function) with wide-band capabilities in close-proximity to a user's body and in form factor suitable for wearing by the user. As noted above, previous size and performance limitations of prior art antennas/devices were poor and made those devices either of limited utility or inoperable.