Abstract: Systems, methods, and apparatus for processing a signal using a non-uniform antenna array are disclosed. In one aspect, a receiver apparatus for processing high frequency signals is provided. The receiver apparatus may comprise an antenna array including a plurality of antenna elements. The plurality of antenna elements may include a first antenna element and a remainder of the plurality of antenna elements. The remainder of the plurality of antenna elements may be uniformly spaced apart from one another by a first distance and arranged in a substantially linear orientation. The remainder of the plurality of antenna elements may include a second antenna element spaced apart from the first antenna element by a second distance. The second distance may be different than the first distance.

Abstract: The present invention relates to a pair of pure wireless earphones using optimal monopole antennae in the technical field of communications, comprising in-ear type earphone housings and RF signal generation devices disposed in the in-ear type earphone housings, wherein positioning stages matched with the shape of auricular concha cavities are at the tops of bottom housings; each RF signal generation device consists of an antenna, a main PCB and a battery; each antenna is used for establishing an RF communication link with an audio source and a secondary earpiece; and a ball is drawn with each antenna as a center point and the outer wall of the corresponding in-ear type earphone housing closest to the antenna as a radius to form a space as an antenna holding area in which the antenna is located, and the radius of the ball is greater than 4 mm.

Abstract: The present invention relates to a pure wireless headphone with a ground reflector, pertaining to the field of communication technology, including an in-ear headphone shell and an RF signal generating device arranged in the in-ear headphone shell. The RF signal generating device includes an antenna, a main RF PCB, a battery and a charging PCB, wherein the helical antenna is used, the top tail end of which is connected with a laterally extending metal tail line. The RF signal generating device further includes a metal frame and a metal ground ring. The main RF PCB is arranged at the top of the metal frame, the metal ground ring is located under the helical antenna, and a gap is reserved between a bottom coil of the helical antenna and the top of the metal ground ring. The metal ground ring can change a radiation ground current, and adjust the angle of the radiation direction. The radiation direction of the antenna inclines about 15 degrees.

Abstract: A laser Doppler vibrometer architecture and detection technique that can remotely identify targets based on their natural vibration frequencies using a scanning Fabry-Pérot interferometer. The proposed systems and methods can have stand-off distances longer than the coherence length of the laser by using spectroscopic detection methods instead of coherent heterodyne detection using a local oscillator. Pulsed lasers can be used which have high power output. In addition, by not using an acousto-optic modulator, the speed of the detectable target is not limited. Also the mixing efficiency of the return signal can be improved.

Abstract: A protective material that includes a dielectric mirror having at least one layer, each layer of the dielectric mirror being configured to reflect at least a portion of incident energy of a predetermined wavelength; and a photonic, crystal array of periodic structures disposed within the dielectric mirror, the photonic crystal array of periodic structures being configured to disperse non-reflected incident energy of the predetermined wavelength transmitted through the dielectric mirror across the photonic crystal array of periodic structures in a direction parallel to a plane of the dielectric mirror.

Abstract: A machine vision system and method uses captured depth data to improve the identification of a target object in a cluttered scene. A 3D-based object detection and pose estimation (ODPE) process is use to determine pose information of the target object. The system uses three different segmentation processes in sequence, where each subsequent segmentation process produces larger segments, in order to produce a plurality of segment hypotheses, each of which is expected to contain a large portion of the target object in the cluttered scene. Each segmentation hypotheses is used to mask 3D point clouds of the captured depth data, and each masked region is individually submitted to the 3D-based ODPE.

Abstract: A machine vision system and method uses captured depth data to improve the identification of a target object in a cluttered scene. A 3D-based object detection and pose estimation (ODPE) process is use to determine pose information of the target object. The system uses three different segmentation processes in sequence, where each subsequent segmentation process produces larger segments, in order to produce a plurality of segment hypotheses, each of which is expected to contain a large portion of the target object in the cluttered scene. Each segmentation hypotheses is used to mask 3D point clouds of the captured depth data, and each masked region is individually submitted to the 3D-based ODPE.

Abstract: The present invention relates to a pure wireless headphone with a ground reflector, pertaining to the field of communication technology, including an in-ear headphone shell and an RF signal generating device arranged in the in-ear headphone shell. The RF signal generating device includes an antenna, a main RF PCB, a battery and a charging PCB, wherein the helical antenna is used, the top tail end of which is connected with a laterally extending metal tail line. The RF signal generating device further includes a metal frame and a metal ground ring. The main RF PCB is arranged at the top of the metal frame, the metal ground ring is located under the helical antenna, and a gap is reserved between a bottom coil of the helical antenna and the top of the metal ground ring. The metal ground ring can change a radiation ground current, and adjust the angle of the radiation direction. The radiation direction of the antenna inclines about 15 degrees.

Abstract: A protective material that includes a dielectric mirror having at least one layer, each layer of the dielectric mirror being configured to reflect at least a portion of incident energy of a predetermined wavelength; and a photonic, crystal array of periodic structures disposed within the dielectric mirror, the photonic crystal array of periodic structures being configured to disperse non-reflected incident energy of the predetermined wavelength transmitted through the dielectric mirror across the photonic crystal array of periodic structures in a direction parallel to a plane of the dielectric mirror.

Abstract: The present invention relates to a pair of pure wireless earphones using optimal monopole antennae in the technical field of communications, comprising in-ear type earphone housings and RF signal generation devices disposed in the in-ear type earphone housings, wherein positioning stages matched with the shape of auricular concha cavities are at the tops of bottom housings; each RF signal generation device consists of an antenna, a main PCB and a battery; each antenna is used for establishing an RF communication link with an audio source and a secondary earpiece; and a ball is drawn with each antenna as a center point and the outer wall of the corresponding in-ear type earphone housing closest to the antenna as a radius to form a space as an antenna holding area in which the antenna is located, and the radius of the ball is greater than 4 mm.

Abstract: A switching device includes a first electrode at least partially disposed within a sealed chamber. The sealed chamber encloses a plasma phase change material. The switching device includes a second electrode at least partially disposed within the sealed chamber. The second electrode is physically separated from the first electrode. When subjected to a signal that satisfies a threshold, the plasma phase change material forms a plasma within the sealed chamber. The first electrode is electrically coupled to the second electrode via the plasma when the plasma is formed. The first electrode is electrically isolated from the second electrode when the plasma is not formed. The switching device includes a first connector electrically coupled to the first electrode and a second connector electrically coupled to the second electrode. The first connector, the second connector, or both, are configured to receive the signal.

Abstract: A laser Doppler vibrometer architecture and detection technique that can remotely identify targets based on their natural vibration frequencies using a scanning Fabry-Pérot interferometer. The proposed systems and methods can have stand-off distances longer than the coherence length of the laser by using spectroscopic detection methods instead of coherent heterodyne detection using a local oscillator. Pulsed lasers can be used which have high power output. In addition, by not using an acousto-optic modulator, the speed of the detectable target is not limited. Also the mixing efficiency of the return signal can be improved.

Abstract: A switching device includes a first electrode at least partially disposed within a sealed chamber. The sealed chamber encloses a plasma phase change material. The switching device includes a second electrode at least partially disposed within the sealed chamber. The second electrode is physically separated from the first electrode. When subjected to a signal that satisfies a threshold, the plasma phase change material forms a plasma within the sealed chamber. The first electrode is electrically coupled to the second electrode via the plasma when the plasma is formed. The first electrode is electrically isolated from the second electrode when the plasma is not formed. The switching device includes a first connector electrically coupled to the first electrode and a second connector electrically coupled to the second electrode. The first connector, the second connector, or both, are configured to receive the signal.

Abstract: A method includes permitting a first signal having a first electromagnetic waveform to pass through an apparatus. The method further includes blocking a second signal having a second electromagnetic waveform at the apparatus, wherein the second electromagnetic waveform is different than the first electromagnetic waveform. The apparatus includes a non-conductive substrate and a plurality of cells including conductive members coupled to the non-conductive substrate, where the conductive members are arranged to form a first discontinuous mesh, where regions between the conductive members of the first discontinuous mesh include a phase change material, and where the phase change material undergoes a phase transition from substantially non-conductive to substantially conductive.

Abstract: A structural wideband aperture assembly and methods are presented. A non-conductive structural backsheet comprises electrical vias. A structural egg-crate core comprises a grid of core strips coupled to the non-conductive structural backsheet and is configured substantially perpendicular to the non-conductive structural backsheet around open boxes. A non-structural grid of antenna feed cards is configured substantially perpendicular to the non-conductive structural backsheet and crosses the core strips. A non-structural grid of antenna feed cards comprises intersections configured within the open boxes, and electronic feed-lines aligned with the electrical vias. Antenna array unit cells comprising antenna cards coupled to the non-structural grid of antenna feed cards and configured to fit within the open boxes.

Abstract: A method includes permitting a first signal having a first electromagnetic waveform to pass through an apparatus. The method further includes blocking a second signal having a second electromagnetic waveform at the apparatus, wherein the second electromagnetic waveform is different than the first electromagnetic waveform. The apparatus includes a non-conductive substrate and a plurality of cells including conductive members coupled to the non-conductive substrate, where the conductive members are arranged to form a first discontinuous mesh, where regions between the conductive members of the first discontinuous mesh include a phase change material, and where the phase change material undergoes a phase transition from substantially non-conductive to substantially conductive.

Abstract: Apparatus, systems and methods for electronic device protection are provided. A particular apparatus includes a non-conductive substrate and a plurality of cells including conductive members coupled to the non-conductive substrate. The conductive members are arranged to form a first discontinuous mesh. Regions between the conductive members of the first discontinuous mesh include a phase change material. The phase change material undergoes a phase transition from substantially non-conductive to substantially conductive responsive to a change of energy.

Abstract: Antenna unit cells suitable for use in antenna arrays are disclosed, as are antenna array and mounting platform such as an aircraft comprising antenna unit cells. In one embodiment, an antenna unit cell comprises a dielectric substrate having a length extending along a first axis and a width extending along a second axis, a first plurality of radiating elements disposed on a first side of the dielectric substrate, and a second plurality of radiating elements disposed on a second side of the dielectric substrate, opposite the first side, wherein the second plurality of radiating elements extend to an edge of the unit cell, and the first plurality of radiating elements overlap portions of the second plurality of radiating elements. Other embodiments may be described.

Abstract: A leaky cavity resonator that includes a waveguide, the waveguide being filled with a dielectric material, and at least two complementary split ring resonators (CSRRs), the CSRRs residing inside the waveguide parallel to each other placed symmetrically both radially and in height, a leaky resonant cavity being formed between the at least two CSRRs and a wall of the waveguide. A frequency band of the leaky cavity resonator is adjustable by varying a distance w between at least one outside perimeter of at least one CSRR and an interior wall of the waveguide. A frequency band of the leaky cavity resonator is also adjustable by varying a size of the leaky resonant cavity. The at least two CSRRs each have at least one stub connecting to a wall of the waveguide. A frequency band of the leaky cavity resonator is also adjustable by varying a size of the stubs.