USA As Represented by Secretary of the Navy

Georgia Tech Research Corporation

Walter D Sessions

Kevin A Boulais

Pearl Rayms-Keller

Simin Feng

Karen J Long

Robert B Nichols

Michael S Lowry

Francisco Santiago

William F Smith

Reniery Cevallos

Lucas R Hale

Victor H Gehman, Jr

Blaise L Corbett

Yehoshua Dan Agassi

Albert J Corda

Jack L Price

Michael H Fugate

Craig Andrew Calcagno

Natasha Laguodas Wilkerson

Henry P Freund

Sarah C Weston

A light transmission system is provided for operating an optically responsive circuit. The system includes a light guide film (LGF) to transmit light emitted from its edge, and a scattering node for directing the light to the circuit. The circuit is disposed on a proximate face of the LGF. The scattering node is disposed on a distal face of the LGF opposite the circuit. The circuit can be an integrated circuit, a light detection sensor or a photovoltaic cell.

Flexible light guide film for electronic activation and control

An optically tunable metamaterial unit cell is provided for photonic switching. The cell is optically tunable and includes a dielectric substrate with upper and lower surfaces. The cell further includes arrays of metamaterial elements and a layer of photo-capacitive material. The arrays are disposed the upper surface of the dielectric substrate. The metamaterial is capable of reflecting electromagnetic radiation. The layer of photo-capacitive material overlaps the arrays of metamaterial elements. The photo-capacitive material is optically tunable.

Optically controlled reflect phased array based on photosensitive reactive elements

A radio frequency (RF) modulating signal splitter used by a multi-beam electron beam RF amplification system includes an RF input port and a plurality of RF output ports. A body frame distributes the RF modulating signal from the input port to the of output ports. The body frame and each one of the RF output ports have dimensions so that each one of the plurality of RF output ports is impedance matched with each other. In a method of modulating a RF input signal onto a plurality of electron beams, the RF input signal is split into a plurality of different paths directed to a plurality of output ports that are impedance matched to each other. RF energy is directed from each output port to a different input cavity of electronic beam RF amplification devices of a multi-beam electronic beam RF amplification system.

Ultra-high efficiency single-beam and multi-beam inductive output tubes

A control device is provided for photonic switching. The device includes an optically tunable metamaterial unit cell. This structure includes a dielectric substrate; at least two arrays of metamaterial elements located on the top surface thereof, the metamaterial being capable of reflecting electromagnetic radiation, and a layer of photo-capacitive material overlapping the at least two arrays of metamaterial elements, the photo-capacitance of the photo-capacitive material being optically tunable; and a reflectarray or phased array system containing the unit cell.

A metal lens is provided for length compacting a horn antenna across a frequency bandwidth. The metal lens includes a feed guide segment having an input cross-section, an intermediate segment, and an exit segment. The feed guide segment receives a signal from the horn antenna along a carry direction; an intermediate segment that expands from the input cross-section laterally to the carry direction. The intermediate segment incorporates an intermediate split vane perpendicular to the carry direction to divide the signal along the carry direction. The exit segment incorporates a plurality of terminating split vanes lateral to the carry direction for transmitting the output signals.

Broadband metal lens antenna

A cloak is provided for concealing an object to an electromagnetic field. A first vane encloses the object and a second vane encloses the first vane. The distance between the first and second vanes varies relative to the object, so as to conceal the object to the electromagnetic field.

Electromagnetic cloak using metal lens

A material is provided for switching dielectric constant between distinct first and second values responsive to electromagnetic radiation having a specified energy. The material includes a medium transparent to the radiation and a plurality of particulates. Each particulate has a dipole that assumes one of distinct first and second parameters that correspond to the first and second values. The particulates are suspended within the medium. The parameters are either dipole span or charge strength. The dipole of each particulate sets to the first parameter by default and sets to the second parameter in response to the radiation. The particulates can be composed from undoped semi-insulating gallium arsenide. The medium can be polymethylmethacrylate, for example.

Broadband artificial dielectric with dynamically optical control

A flux compression generator (FCG) is provided for producing an electromagnetic pulse (EMP). The FCG includes an environmental case, a reactive load, a dielectric core, a superconducting stator, an electric energy source, a load switch, and a transition device. The reactive load transmits the EMP in response to an electric current pulse. The dielectric core has proximal and distal ends within the case, with the stator disposed coaxially around the core that provides structural support. The case contains the electrical energy source, the stator, the core and the transition device. The energy source connects to the stator at the proximal end and powers the transition device. The load switch connects the reactive load to the stator at the distal end. The energy source initially provides an electric current to the stator. The device upon activation heats at least a portion of the stator to reversibly transition the portion from a superconducting state to a non-superconducting state. The stator transfers the electric current as the pulse to the reactive load upon the portion's transition to the non-superconducting state. The stator can be a superconducting helical coil that wraps around the core connected to a superconducting conductor disposed coaxially within the core. Alternatively, the stator can be a stack of superconducting rings disposed coaxially along the core. The superconducting coil and rings can preferably be composed of a high temperature superconductive material on a metal substrate.

Flux compression generator

An optically tunable cavity for an electronic device concurrently achieves high bandwidth (for example, at least about 10 percent, typically greater than about 50 percent) with high DC-RF efficiency (for example, at least about 50 percent, typically greater than about 85 percent). The electronic device may be a vacuum electronic device, including linear-beam and cross-field devices, with either an input circuit or an output circuit, or both, containing a photocapacitance-controlled resonator embedded such that a laser beam can impinge upon a semiconductor gap of the resonator. The laser beam may instantaneously change the resonant mode of the overall loaded cavity, thus allowing for amplification or oscillation of the desired frequency throughout the vacuum electronic device.

Growing community of inventors

Marietta, GA, United States of America

Walter D Sessions