Patent
Sub-nyquist complex-holographic aperture antenna configured to define selectable, arbitrary complex electromagnetic fields
Pai-Yen Chen,Tom Driscoll,Siamak Ebadi,John Desmond Hunt,Nathan Ingle Landy,Melroy Machado,Milton Perque,David R. Smith,Yaroslav A. Urzhumov +8 more
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TLDR
In this paper, a sub-Nyquist complex-holographic aperture is configured to define at least two selectable, arbitrary complex radiofrequency electromagnetic fields on a surface with tangential wavenumbers up to 2π over the aperture element spacing.Abstract:
Described embodiments include an antenna, method, and an apparatus. The antenna includes a sub-Nyquist complex-holographic aperture configured to define at least two selectable, arbitrary complex radiofrequency electromagnetic fields on a surface with tangential wavenumbers up to 2π over the aperture element spacing (k_apt=2π/a).read more
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Liquid-crystal tunable metasurface for beam steering antennas
TL;DR: In this paper, an electronically tunable metasurface whose reflective phase can be electronically reconfigured to allow effective antenna beam steering is presented. But the first and second double-sided substrates define an intermediate region between them containing liquid crystal in a nematic phase.
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Patent
Wireless power transfer using tunable metamaterial systems and methods
Eric J. Black,Brian Mark Deutsch,Alexander Remley Katko,Melroy Machado,Jay Howard McCandless,Yaroslav A. Urzhumov +5 more
TL;DR: In this paper, a scattering matrix (S-Matrix) of field amplitudes for each of a plurality of modeled lumped antenna ports, N, with impedance values corresponding to the impedance values of associated impedance elements and at least one modeled external port, N e, located external to the antenna system at a specified radius vector.
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Andrew Joyce,Paul Reynolds +1 more
TL;DR: In this article, a beamforming system for wireless power transfer is described, where the phase of a wave front of the simulated beam that would be received by elements of the first WPT device is determined and a control signal for each of the elements for which phases were determined is generated based on the determined phase of the wave front that would have been received at the element.
Patent
Wireless power transfer management
TL;DR: In this article, a beam definition circuit is used to determine an electromagnetic field distribution over an aperture of the electronically reconfigurable beam-forming antenna implementing the selected focused electromagnetic beam.
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Patent
Surface scattering antennas
Adam Bily,Anna K. Boardman,Russell J. Hannigan,John Desmond Hunt,Nathan Kundtz,David R. Nash,Ryan Stevenson,Philip A. Sullivan +7 more
TL;DR: In this article, surface scattering antennas provide adjustable radiation fields by adjustably coupling scattering elements along a wave-propagating structure, where the scattering elements are complementary metamaterial elements.
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TL;DR: In this paper, a holographic surveillance system including means for generating electromagnetic waves, means for transmitting the electromagnetic waves toward a target at a plurality of predetermined positions in space; means for receiving and converting electromagnetic waves reflected from the target to electrical signals at a multiplicity of predetermined locations in space, and means for processing the electrical signals to obtain signals corresponding to holographic reconstruction of the target.
Patent
Agile holographic optical phased array device and applications
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Patent
Metamaterial devices and methods of using the same
David R. Smith,David J. Brady,Tom Driscoll,John Desmond Hunt,Alex Mrozack,Matthew S. Reynolds,Daniel L. Marks +6 more
TL;DR: In this article, the transformation of an emitted multimodal signal is measured, and then the image is captured in compressed form using a set of metamaterial antennas and transceivers.