Abstract: An LED tube lamp comprises a lamp tube, a diffusive layer covered on a surface of the lamp tube, two end caps, a light strip, LED light sources on the light strip, and a power supply. Each of the two end caps is coupled to a respective end of the lamp tube. The light strip is attached to an inner circumferential surface of the lamp tube. The power supply module comprises a printed circuit board electrically connected to the light strip, a rectifying circuit and a filtering circuit coupled to the rectifying circuit. An end of the light strip is detached from the inner circumferential surface of the lamp tube and electrically connected to the printed circuit board.

Abstract: A LED based lighting apparatus is disclosed. The light engine used in the lighting apparatus may use printed circuit board and have a plurality of LED groups that are independently controllable by a control unit. The power supply input and return paths connected to each LED group may be implemented on different layers to allow a compact footprint that may be used with traditional fluorescent encasements with relatively little modification. The LEDs may comprise a subset of LEDs having a first colour and a subset of LEDs having a second colour different from said first colour intertwined on the light engine.

Abstract: A method of making a dielectric, Dk, electromagnetic, EM, structure, includes: providing a first mold portion comprising substantially identical ones of a first plurality of recesses arranged in an array; filling the first plurality of recesses with a curable first Dk composition having a first average dielectric constant greater than that of air after full cure; placing a substrate on top of and across multiple ones of the first plurality of recesses filled with the first Dk composition, and at least partially curing the curable first Dk composition; and, removing the substrate with the at least partially cured first Dk composition from the first mold portion, resulting in an assembly having the substrate and a plurality of Dk forms including the at least partially cured first Dk composition, each of the plurality of Dk forms having a three dimensional, 3D, shape defined by corresponding ones of the first plurality of recesses.

Abstract: A scanning antenna includes a transmission and/or reception region including a plurality of antenna units and a non-transmission and/or reception region other than the transmission and/or reception region. The scanning antenna includes a TFT substrate, a slot substrate, a liquid crystal layer provided between the TFT substrate and the slot substrate, a seal portion provided in the non-transmission and/or reception region and surrounding the liquid crystal layer, and a reflective conductive plate disposed opposing a second main surface of a second dielectric substrate with a dielectric layer interposed between the reflective conductive plate and the second main surface. The slot electrode includes an opening or a recessed portion formed in the non-transmission and/or reception region and in the region surrounded by the seal portion.

Abstract: A multiple antenna system comprises at least two dipole-type radiators with first and second radiator elements, respectively, which are arranged at a distance from a reflector arrangement. A phase shifter arrangement with a phase shifter adjustment device is connected to the first and second radiator elements to adjust the phase relationships between the first radiator elements and between the second radiator elements. A decoupling arrangement is coupled to a decoupling adjustment device. The decoupling adjustment device is mechanically coupled to the phase shifter adjustment device, so that when the phase shifter adjustment device is moved, the decoupling arrangement: is changeable in its length, width and/or shape; or is changeable in its position, whereby the change of position is accelerated or only partially synchronized with the adjusting movement of the phase-shifting device; or is changeable in its position, wherein the decoupling arrangement is arranged within at least one of the radiators.

Abstract: A device, comprising: an antenna array provided with a plurality of antennas each having a semiconductor layer having terahertz-wave gain; and a coupling line for mutual frequency-locking of at least two of the antennas at a frequency of the terahertz-wave, wherein the coupling line is connected to a shunt device, and the shunt device is connected in parallel to the semiconductor layer of each of the two antennas.

Abstract: Systems and methods related to multi-die integrated circuits that may include dies having high-speed core interconnects. The high-speed core interconnects may be used to directly connect two adjacent dies.

Abstract: An electric circuit includes a plurality of superconducting components, each of the plurality of superconducting components having: a respective first terminal; a respective second terminal; and a respective input. The electric circuit further includes a bias current source electrically-connected to the respective first terminal of each of the plurality of superconducting components. The bias current source is configured to provide a bias current adapted to cause the electric circuit to function as a logical OR gate on the respective inputs of the plurality of superconducting components. The electric circuit further includes an output node adapted to output a state of the logical OR gate.

Abstract: Disclosed is a device including a first line, a second line including a first section disposed on a first side of the first line and a second section disposed on a second side of the first line, the second side being opposite to the first side and the second section being separate from the first section by a distance, and at least one bridge electrically connecting an end of the first section with an end of the second section and extending across the first line. The device may be a directional coupler that achieves significantly higher directivity than conventional directional coupler structures, and hence, improves power detection accuracy.

Abstract: According to various embodiments of the present invention, an antenna device can comprise: a substrate layer; a source antenna arranged on the substrate layer so as to include a radiating conductor for radiating electromagnetic waves in the direction in which one surface of the substrate layer is oriented; and a planar lens for converting quasi-spherical electromagnetic waves radiated from the source antenna into plane waves. The antenna device can be varied according to embodiments.

Abstract: The present subject matter provides technical solutions for the technical problems facing quantum computing by improving the accuracy and precision of qubit readout. Technical solutions described herein improves the readout fidelity by reducing the ambiguity between the bright and dark states. In an embodiment, this includes transferring the qubit population that is in the dark quantum state to an auxiliary third state. The auxiliary third state remains dark and reduces the mixing between the logical bright and dark states. This process uses multiple laser pulses to ensure high fidelity population transfer, thus preserving the dark nature of the dark state. Improving readout fidelity of 171Yb+ qubits may improve fidelity by an order of magnitude, such as by improving readout fidelity from 99.9% to 99.99%. This improvement in detection fidelity may substantially increase the computational power of a quantum computer.

Abstract: A reflector structure is configured to connect an antenna. The antenna has an excitation source. The reflector structure includes a metal substrate, at least one first flat plate and a second flat plate. The metal substrate is configured to reflect the radiation of the antenna. The at least one first flat plate is disposed on the metal substrate. The second flat plate is floated to the metal substrate along a virtual normal and completely separated from the at least one first flat plate to form a closed slot. A cavity is formed by the metal substrate, the at least one first flat plate and the second flat plate and communicated with the closed slot. The excitation source is projected onto a plane to form an excitation source region. The excitation source region is located in the second flat plate.

Abstract: A circuit and method are provided to monitor a clock for a data processor. The method includes receiving a clock signal and producing a first voltage proportional to a frequency of the clock signal. The first voltage is converted to a digital signal. During an initialization mode, the method ensures the clock signal is at a desired frequency and scales the digital signal using a first configurable ratio to produce a high threshold value. When changing from the initialization mode to an operating mode, the method ceases to scale the digital signal and maintains the high threshold value. During the operating mode, the method compares the digital signal to the high threshold value to determine if the clock signal has been increased in frequency beyond a desired level, and if so, triggers an overclock alert to a system management circuit of the data processor.

Abstract: A system for upgrading and retrofitting existing streetlights. The system enables conventional streetlights using sodium vapor, and other conventional lighting technologies, to be upgraded to more energy efficient and long-lasting LED lighting. At the same time, cellular and wireless communications can be added to the streetlight to provide additional bandwidth over that provided by conventional cell towers. The system can offload bandwidth in otherwise overloaded areas, such as densely populated urban areas. The system can include mini- or micro-cellular routers, GPS, Wi-Fi, Bluetooth®, and other micro cellular and wireless technologies. The system can include a light fixture styled to look like existing conventional light fixtures and can be retrofitted to existing streetlight poles and mounts with little, or no, modification to the pole and wiring.

Abstract: A broadband panel array antenna includes a polarization layer, a radiating layer and a feed layer which are sequentially stacked from top to bottom. The feed layer is used for converting a single path of TE10 mode signals into a plurality of paths of same-power in-phase TE10 mode signals and transmitting the plurality of paths of TE10 mode signals to the radiating layer. The radiating layer is used for radiating the plurality of paths of TE10 mode signals from the feed layer to a free space. The polarization layer is used for rotating the polarization direction of an electric field generated by the radiating layer to reduce the side lobe in an E-plane direction diagram and an H-plane direction diagram. The broadband panel array antenna has the advantages of being low in side lobe, high in gain and efficiency, and low in machining cost.

Abstract: Parabolic reflector antennas advantageously support low side lobe radiation patterns for ETSI class 4 performance, by utilizing: (i) metal choke plates adjacent a distal end of a dielectric cone within a sub-reflector assembly, (ii) “lossy” material feed boom waveguide sleeves and/or (iii) extended length cylindrical shields lined with radiation absorbing materials. Relatively shallow and large diameter parabolic reflectors having an F/D ratio of greater than about 0.25 may be provided with one or more of the identified (i)-(iii) enhancements.

Abstract: A dipole antenna includes an elongate substrate and a first, second, and third conductive pieces on the substrate, the first conductive piece having a main part, a straight part, and a bent part, a free end of the straight part defining a feeding point, the second conductive piece having a bent portion, two U-shaped portions, and a ground portion, wherein the main part of the first conductive piece includes a connecting portion connected to the straight part, a meander portion connected at one end thereof to the connecting portion, and an end portion connected to an opposite end of the meander portion, and the straight part of the first conductive piece is disposed between the two U-shaped portions of the second conductive piece.

Abstract: Provided is an antenna for receiving radio waves including frequencies in the L6 band unique to QZSS to realize accurate positioning by QZSS. A substrate-type antenna 1 comprises an arcuate antenna element 20 including a long arcuate antenna element 22 and a short arcuate antenna element 24, each of which includes an integral antenna element compatible with three frequency bands and a single antenna element compatible with one frequency band and arranged with a space from the integral antenna element. Each of the integral antenna element and the single antenna element extends from an outer peripheral part of the arcuate antenna element toward an inner peripheral part thereof. The substrate-type antenna 1 further comprises a plurality of connection units 34 connected to the long arcuate antenna element 22 and the short arcuate antenna element 24, respectively, and a coupler 30 to which the plurality of connection units 34 is coupled.

Abstract: A substrate integrated waveguide fed antenna includes an electric dipole arrangement, a parasitic patch arrangement operably coupled with the electric dipole arrangement, and a feed structure. The feed structure includes a substrate integrated waveguide operably coupled with the electric dipole arrangement for exciting the electric dipole arrangement. A slotted conductive surface with a slot is arranged between the electric dipole arrangement and the feed structure for operably coupling the feed structure with the electric dipole arrangement.

Abstract: The present invention provides a single-fed wideband circularly-polarized dielectric resonant antenna. The antenna includes a lower antenna portion configured as a twisted inverted-frustum having a twist angle ? between its top and bottom surfaces, wherein the twist angle ? is greater than zero degrees and less than 5 degrees. An upper antenna portion extends from the lower antenna portion top surface. The upper portion includes plural interleaved slabs of first and second dielectric materials having respective first and second dielectric constants, the interleaved slabs having a stepwise-varying height between adjacent slabs. The antenna may be mounted on a printed circuit substrate at a 45 degree angle to an excitation slot. The antenna may be compact and easily manufactured using 3-D printing techniques.