Abstract: Described embodiments include a system and method. A system includes a tracking circuit configured to determine a location of a target device within a Fresnel region of an electronically reconfigurable beam-forming antenna. The antenna is configured to implement at least two selectable focused electromagnetic beams within its Fresnel region. The system includes a beam selector circuit configured to select from the at least two selectable focused electromagnetic beams a focused electromagnetic beam having a focal spot that covers at least a portion of the determined location of the target device. The system includes a beam definition circuit configured to determine an electromagnetic field distribution over an aperture of the electronically reconfigurable beam-forming antenna implementing the selected focused electromagnetic beam. The system includes an output circuit configured to transmit a signal indicative of the determined electromagnetic field distribution.

Abstract: An apparatus includes a base having a first surface and an array of pillars. Each pillar of the array of pillars includes (i) a first end attached to the first surface of the base; (ii) a second end having an electric charge retention portion; (iii) a physical separation from adjacent pillars of the array of pillars; and (iv) an electrical conductor configured to electrically connect the electric charge retention portion with a bus structure. The bus structure is configured to addressably connect with the electrical conductor of each respective pillar of the array of pillars.

Abstract: Described embodiments include a system and method. An antenna is configured to implement at least two selectable radiative electromagnetic field spatial distributions. Each selectable radiative electromagnetic field spatial distributions respectively has a bounding surface that describes a specified power density in the radiative electromagnetic field. A sensor circuit is configured to detect a presence of an object within the bounding surface of an implemented radiative electromagnetic field. A countermeasure circuit is configured to select a response to the detected presence of the object within the bounding surface of the implemented radiative electromagnetic field.

Abstract: Described embodiments include a system and method. A system includes a tracking circuit configured to determine a location of a target device within a Fresnel region of an electronically reconfigurable beam-forming antenna. The antenna is configured to implement at least two selectable focused electromagnetic beams within its Fresnel region. The system includes a beam selector circuit configured to select from the at least two selectable focused electromagnetic beams a focused electromagnetic beam having a focal spot that covers at least a portion of the determined location of the target device. The system includes a beam definition circuit configured to determine an electromagnetic field distribution over an aperture of the electronically reconfigurable beam-forming antenna implementing the selected focused electromagnetic beam. The system includes an output circuit configured to transmit a signal indicative of the determined electromagnetic field distribution.

Abstract: Described embodiments include a system and method. An antenna is configured to implement at least two selectable radiative electromagnetic field spatial distributions. Each selectable radiative electromagnetic field spatial distributions respectively has a bounding surface that describes a specified power density in the radiative electromagnetic field. A sensor circuit is configured to detect a presence of an object within the bounding surface of an implemented radiative electromagnetic field. A countermeasure circuit is configured to select a response to the detected presence of the object within the bounding surface of the implemented radiative electromagnetic field.

Abstract: The present disclosure provides system and methods for calibrating a tunable metamaterial device. A sequence of port impedance vectors, (z(m), m), may be generated. Each of the port impedance vectors may be applied to the tunable metamaterial device, and measuring at least one S-parameter. A simulated S-Matrix may be generated by associating each of the port impedance vectors, z(m), with the unknown admittance matrix. The unknown admittance matrix may be solved for by determining a plurality of optimization variables by comparing each of the S-parameters, S(m), to the simulated S-Matrix for each port impedance vector, z(m), and generating an estimated admittance matrix by associating each of the optimization variables with the unknown admittance parameters. The estimated admittance matrix may be used for more accurate radiation patterning.

Abstract: The present disclosure provides system and methods for calibrating a tunable metamaterial device including a plurality of external antennas. A sequence of port impedance vectors, (z(m), m) may be generated. Each of the port impedance vectors may be applied to the tunable metamaterial device, and measuring at least one S-parameter associated with an antenna external to the tunable metamaterial device. A simulated S-Matrix may be generated by associating each of the port impedance vectors, z(m), with the unknown admittance matrix. The unknown admittance matrix may be solved for by determining a plurality of optimization variables by comparing each of the S-parameters, S(m), to the simulated S-Matrix for each port impedance vector, z(m), and generating an estimated admittance matrix by associating each of the optimization variables with the unknown admittance parameters. The estimated admittance matrix may be used for more accurate radiation patterning.

Abstract: A surface scattering reflector antenna includes a plurality of adjustable scattering elements and is configured to produce a reflected beam pattern according to the configuration of the adjustable scattering elements.

Abstract: An array of scattering and/or reflector antennas are configured to produce a series of beam patterns, where in some embodiments the scattering antenna and/or the reflector antenna includes complementary metamaterial elements. In some embodiments circuitry may be configured to set a series of conditions corresponding to the array to produce the series of beam patterns, and to produce an image of an object that is illuminated by the series of beam patterns.

Abstract: An array of scattering and/or reflector antennas are configured to produce a series of beam patterns, where in some embodiments the scattering antenna and/or the reflector antenna includes complementary metamaterial elements. In some embodiments control circuitry is operably connected to the array to produce an image of an object in the beam pattern.

Abstract: An array of scattering and/or reflector antennas are configured to produce a series of beam patterns, where in some embodiments the scattering antenna and/or the reflector antenna includes complementary metamaterial elements. In some embodiments circuitry may be configured to set a series of conditions corresponding to the array to produce the series of beam patterns, and to produce an image of an object that is illuminated by the series of beam patterns.

Abstract: An array of scattering and/or reflector antennas are configured to produce a series of beam patterns, where in some embodiments the scattering antenna and/or the reflector antenna includes complementary metamaterial elements. In some embodiments control circuitry is operably connected to the array to produce an image of an object in the beam pattern.

Abstract: A surface scattering reflector antenna includes a plurality of adjustable scattering elements and is configured to produce a reflected beam pattern according to the configuration of the adjustable scattering elements.