公开(公告)号：US09871291B2

公开(公告)日：2018-01-16

申请号：US14257386

申请日：2014-04-21

Applicant: Elwha LLC

Inventor： Pai-Yen Chen ,  Tom Driscoll ,  Siamak Ebadi ,  John Desmond Hunt ,  Nathan Ingle Landy ,  Melroy Machado ,  Milton Perque, Jr. ,  David R. Smith ,  Yaroslav A. Urzhumov

IPC: H01F27/42 ,  H01F37/00 ,  H01F38/00 ,  H01Q3/00 ,  H01Q3/24 ,  H01Q3/46 ,  H01Q15/14

CPC classification number: H01Q3/00 ,  H01Q3/247 ,  H01Q3/46 ,  H01Q15/002 ,  H01Q15/148 ,  H01Q19/067 ,  H02J50/23 ,  H02J50/60 ,  H02J50/80

Abstract: Described embodiments include a system, method, and apparatus. A system includes an antenna comprising a sub-Nyquist holographic aperture configured to define selectable arbitrary complex radiofrequency electromagnetic fields on a surface of the antenna. A path analysis engine tests power transmission pathways from the antenna to a target device located in an environment within a space radiateable by the antenna. The environment includes a human being. An optimization circuit selects responsive to the tested power transmission pathways a power transmission regime. The regime includes an electromagnetic radiation pattern shaped to transfer radiofrequency electromagnetic power from the antenna to the target device without exceeding a radiation exposure limit for humans. A gain definition circuit selects a complex radiofrequency electromagnetic field implementing the selected power transmission regime from the at least two selectable, complex radiofrequency electromagnetic fields. An antenna controller defines the selected arbitrary complex radiofrequency electromagnetic field in the sub-Nyquist holographic aperture.

公开(公告)号：US09825358B2

公开(公告)日：2017-11-21

申请号：US14257415

申请日：2014-04-21

Applicant: Elwha LLC

Inventor： Pai-Yen Chen ,  Tom Driscoll ,  Siamak Ebadi ,  John Desmond Hunt ,  Nathan Ingle Landy ,  Melroy Machado ,  Milton Perque, Jr. ,  David R. Smith ,  Yaroslav A. Urzhumov

IPC: H01F27/42 ,  H01F37/00 ,  H01F38/00 ,  H01Q3/00 ,  H01Q3/24 ,  H01Q3/46 ,  H01Q15/14

CPC classification number: H01Q3/00 ,  H01Q3/247 ,  H01Q3/46 ,  H01Q15/002 ,  H01Q15/148 ,  H01Q19/067 ,  H02J50/23 ,  H02J50/60 ,  H02J50/80

Abstract: Described embodiments include a system, method, and apparatus. The system includes an antenna comprising a sub-Nyquist holographic aperture configured to define selectable arbitrary complex radiofrequency electromagnetic fields on a surface of the antenna. A mapping engine models an environment within a space radiateable by the antenna. The environment includes a target device and a human being. An optimization circuit selects responsive to the model of the environment a power transmission regime. The power transmission regime includes radiation pattern shaped to wirelessly transfer electromagnetic power from the antenna to the target device without exceeding a radiation exposure limit for humans. A gain definition circuit selects a complex radiofrequency electromagnetic field implementing the selected power transmission regime from the at least two selectable arbitrary complex radiofrequency electromagnetic fields. An antenna controller defines the selected arbitrary complex radiofrequency electromagnetic field in the sub-Nyquist holographic aperture.

公开(公告)号：US10236574B2

公开(公告)日：2019-03-19

申请号：US14257187

申请日：2014-04-21

Applicant: Elwha LLC

Inventor： Pai-Yen Chen ,  Tom Driscoll ,  Siamak Ebadi ,  John Desmond Hunt ,  Nathan Ingle Landy ,  Melroy Machado ,  Milton Perque, Jr. ,  David R. Smith ,  Yaroslav A. Urzhumov

IPC: H01Q3/00 ,  H02J50/23 ,  H02J50/60 ,  H01Q19/06 ,  H01Q15/00 ,  H02J50/80 ,  H01Q15/14 ,  H01Q3/46 ,  H01Q3/24

Abstract: Described embodiments include an antenna and a method. In an embodiment, the antenna includes a holographic aperture having a surface including a plurality of individual electromagnetic wave scattering elements distributed thereon with a periodic inter-element spacing equal to or less than one-half of a free space wavelength of an operating frequency of the antenna. The aperture is configured to define at least two selectable complex radiofrequency electromagnetic fields on the surface with tangential wavenumbers up to 2π over the aperture element spacing (k_apt=2π/a). In an embodiment, the holographic aperture includes an amplitude and phase modulation holographic aperture. In an embodiment, each electromagnetic wave scattering element has a respective electronically controllable electromagnetic response to an incident radiofrequency electromagnetic wave, and the plurality of individual electromagnetic wave scattering elements are electronically controllable in combination to define the at least two selectable complex radiofrequency electromagnetic fields on the surface.