930 results about "Radiation properties" patented technology

A switchable resistive device has a multi-layer thin film structure interposed between an upper conductive electrode and a lower conductive electrode. The multi-layer thin film structure comprises a perovskite layer with one buffer layer on one side of the perovskite layer, or a perovskite layer with buffer layers on both sides of the perovskite layer. Reversible resistance changes are induced in the device under applied electrical pulses. The resistance changes of the device are retained after applied electric pulses. The functions of the buffer layer(s) added to the device include magnification of the resistance switching region, reduction of the pulse voltage needed to switch the device, protection of the device from being damaged by a large pulse shock, improvement of the temperature and radiation properties, and increased stability of the device allowing for multivalued memory applications.

An arrangement for enhancing electrical isolation between antennas in antenna structures comprising at least two antennas, and a radio device applying the arrangement. The interfering antenna comprises components causing substantial degradation in radiation characteristics in the operating band of another antenna. For example, a PIFA (310) may comprise, instead of a short-circuit conductor, a conductive structure (312, 313, 314) having a parallel resonance in the operating band of another antenna (320). Mutual interference of radio parts using separate antennas can be made relatively small without electrical isolation arrangements between antenna elements. Moreover, the invention makes antenna filter design easier and reduces disadvantages caused by antenna filters.

A damped structural panel includes a panel having bending modes including demanding bending modes. The demanding bending modes have subsonic bending waves along at least one axis, and require damping treatment based on sound radiation properties of the panel. A viscoelastic material is applied within a limited area adjacent to the panel edges based on the demanding bending modes. The viscoelastic material damps sound radiation caused by bending waves during use of the structural panel, such as use as a body panel on an aircraft.

An illumination unit includes a light guide having an incidence surface, a frame which is spaced apart from the incidence surface of the light guide, an accommodation section which is formed between the incidence surface of the light guide and the frame, and a light source unit including light-emitting diodes, a film substrate on which the light-emitting diodes are amounted, a heat radiation member having a support portion which supports the film substrate and a reflection portion which extends from the support portion, and an adhesive tape which adheres the film substrate to the support portion and has heat radiation properties, the light source unit being accommodated in the accommodation section.

The radiation properties and wave guiding properties of frequency selective surfaces are used in conjunction with closely spaced antenna elements to fabricate antenna structures having adjustable radiation characteristics. The direction, magnitude, and polarization of radiation patterns for such antenna structures can be adjusted by varying the texture or patterning of layers of conducting material forming the frequency selective surfaces. The invention enables the fabrication of low profile antenna structures that can easily be conformed or integrated into complex surfaces without sacrificing antenna performance.

The radiation properties and wave guiding properties of frequency selective surfaces are used in conjunction with closely spaced antenna elements to fabricate antenna structures having adjustable radiation characteristics. The direction, magnitude, and polarization of radiation patterns for such antenna structures can be adjusted by varying the texture or patterning of layers of conducting material forming the frequency selective surfaces. The invention enables the fabrication of low profile antenna structures that can easily be conformed or integrated into complex surfaces without sacrificing antenna performance.

The invention discloses a PC/ABS alloy modified engineering plastic dedicated for laptop casings. The plastic comprises the following components in percentage by weight: 22% to 65% of polycarbonate, 1% to 10% of compatilizer, 22% to 65% of acrylonitrile-butadiene-styrene, 5% to 40% of mineral filling material, 0.3% to 1% of antioxidant, 3% to 20% of halogen-free fire retardant, 0.5% to 2% of dispersed lubricant, and 3% to 20% of flexibilizer. The invention also discloses a production method of the PC/ABS alloy modified engineering plastic dedicated for laptop casings. The PC/ABS alloy modified engineering plastic dedicated for laptop casings has the advantages of capability of being recycled and utilized, multi-choice of color and outer layer treatment, stable size, good heat radiation property, and high cost performance. The production method has the advantages of simple operation and suitability for mass production.

A built-in antenna of a portable terminal and a method of forming the same are provided. The built-in antenna includes a first conductor having a specific length and used for a ground, a second conductor disposed with a specific distance in parallel to the first conductor to couple with the first conductor and used for power feeding, and a separating element disposed between the first conductor and the second conductor to separate the first and second conductors. Accordingly, the built-in antenna may exhibit a smooth radiation property even if a metal construction is used in a device and thus may implement robustness improvement of the device and make the device slim and have an attractive outer appearance. In addition, a method of improving antenna efficiency may prevent deterioration of the radiation property of the antenna radiator of the related art by using simple processing, and the metal construction may be used as a radiator.

A ceramic substrate for mounting a light emitting element. The ceramic substrate has a placement surface for placing a light emitting element having an electrode; and an electrode electrically-connected with the electrode of the light emitting element, wherein the ceramic substrate comprises a substrate body consisting of a nitride ceramics; and a coat layer coating at least a part of a surface of the substrate body and consisting of a ceramics different from the nitride ceramics forming the substrate body; and the coat layer has an optical reflectance of 50% or more for any light having a wavelength of from 300 to 800 nm, which can increase a luminance of the light emitting element by reflecting the light emitted from the element efficiently with certainty, and which has a high heat radiation property; and a manufacturing method therefor.

A semiconductor light-emitting device according to an embodiment of the present invention includes chip LEDs formed on a silicon submount, in which a wiring pattern having a chip connecting terminal portion connecting the chip LEDs, an external connecting terminal portion connecting an external unit, and a plurality of lead portions connecting a corresponding chip connecting terminal portion and a corresponding external connecting terminal portion is formed on the silicon submount, and an area of the chip connecting terminal portions is made larger than an area of a region where the chip connecting terminal portion overlaps with the chip LEDs. Accordingly, a semiconductor light-emitting device of high heat radiation property and heat resistance can be provided.

The invention is directed to a radiation source for generating extreme ultraviolet (EUV) radiation, particularly for photolithography exposure processes. The object of the invention is to find a novel possibility for realizing radiation sources for generating extreme ultraviolet (EUV) radiation which permits a uniform basic construction for ensuring beam characteristics that are reproducible over the long term and in which the source is conceived so as to be flexible with respect to specific applications. This object is met according to the invention in that any plasma generation unit is provided for introducing high energy input supplied in a pulsed manner in a vacuum chamber, and the radiation generated from the plasma is monitored by an energy monitor unit which measures the pulse energy of the emitted radiation and by a radiation diagnosis unit which detects the radiation characteristics to obtain result data for influencing the excitation conditions for the plasma and to influence the parameters of the plasma generation in an application-specific manner by means of the main control unit.

An illuminating device that is improved in heat radiation property and is suppressed in the occurrence of peeling and warping of a reflector. The reflector having a housing portion that houses a light emitting diode element is disposed on a substrate a visible light converting layer is formed on the housing portion and a lens is disposed on the reflector. A circuit pattern, the light emitting diode element, the reflector, the visible light converting layer, and the lens are disposed on the substrate, and the reflector and the lens are respectively adhered using a same type of adhesive agent. The heat radiation property can thus be improved, the peeling and warping of the reflector, etc., is suppressed, and accordingly, the optical characteristics of the device can be maintained.

The invention relates to a double-disk type magnetorheological clutch which comprises a driving disk, a driven disk, a magnetorheological fluid, a transmission shaft, a rotating blade, a magnetic conduction shell, a magnet exciting coil, an insulation ring, a fluid inlet, a fluid outlet, a bearing and a sealing element, wherein the driving disk is connected to a driving shaft; the driven disk is connected to a driven shaft; the magnetorheological fluid is filled between primary and secondary magnetic conduction disks through the fluid inlet; a sealing ring device is rotated so as to keep the magnetorheological fluid between the two disks; the magnet exciting coil is fixed in the magnetic conduction shell with no need of an electric brush; and the magnetorheological fluid is sealed between the two disks, and the rotating blade is arranged on the transmission shaft. The rotating blade is rotated under the driving of the transmission shaft, so air is guided to circularly flow through an air vent, and the excellent radiating property is maintained. The double-disk type magnetorheological clutch has the advantages of compact structure and good radiation property, and can be used for natural air cooling.

This invention provides a high-temperature far infrared radiation electric heater of carbon material and its preparation method, among which its heating elements are made from one of carbon felts, carbon cloth, graphite felts, graphite cloth, carbon/carbon composite material sheets and carbon/graphite composite material sheets. The carbon content of its heating heating element is larger than 95%,oxygen content is lower than 0.005%, the resistivity is between (0.001-100) ohm cm, the outside of the electric heater insulator is coated with a ceramic film layer with far infrared radiation property. This invention also provides a preparation method for the high-temperature far infrared radiation electric heater.

A measurement apparatus includes an anechoic chamber, a DUT board, rotation units, and a feeding arm. The anechoic chamber has inner-walls. Each inner-wall is covered with a radio wave absorber. One of the inner-wall is a first wall with an aperture and the other inner-walls are second walls. The DUT board holds a first antenna to be measured with radiation property and a probe to detect a signal from the first antenna. A part of the DUT board is inserted into the anechoic chamber through the aperture opened in the first wall. One end of the feeding arm holds a second antenna radiating a radio wave to the first antenna in the anechoic chamber. Each rotation unit provides on each second wall and is selectively attached to the other end of the feeding arm for rotating the second antenna and for feeding to the second antenna.

The invention discloses an aqueous heat dissipation coating and a preparation method thereof. The aqueous heat dissipation coating comprises an aqueous dispersoid containing a base resin, nanometer carbon material-coated boron nitride composite powder and optional auxiliary materials. The composite powder comprises boron nitride and a boron nitride-coating nanometer carbon material. The preparation method comprises carrying out grinding dispersion on the aqueous dispersoid containing a base resin and the optional auxiliary materials to obtain dispersive slurry, at least adding slowly the composite powder into the dispersive slurry, carrying out high speed stirring and carrying out standing defoaming. The nanometer carbon material-coated boron nitride composite powder is used as a coating filler so that excellent thermal conductivity of the nanometer carbon material and boron nitride and conductive infrared radiation characteristics of the nanometer carbon material are fully utilized, interface thermal resistance of the nanometer carbon material and boron nitride is reduced, and the coating has the advantages of high thermal conductivity, high infrared radiation rate, construction convenience, safety, environmental friendliness and wide application prospect.

The invention provides a quick testing method for the radiation characteristic of an array antenna. In a non-darkroom environment, a transceiver is used for emitting a signal to the antenna to be tested, a probe moving according to a track is used for receiving the signal and transmitting the signal back to the transceiver, a main control computer is used for calculating an output port surface near field value, a directional diagram of the array antenna to be tested is synthesized according to the output port surface near field value, and then a parameter value of the radiation characteristic of the array antenna is obtained. The method has no special requirement for the testing environment and is not limited by site size, weather and the like, a strict shield chamber is not needed, testing can be carried out in the production environment or the research and development environment of the antenna, testing speed and efficiency are high, the testing devices occupy a small area, testing can be carried out anytime conveniently and rapidly, the testing result is comprehensive and accurate, and the method is particularly suitable for quick detection of antenna products on a production line and being used for primary detection of the antenna during product research and development.

A re-reconfigurable built-in antenna of a portable terminal is provided. The antenna includes an antenna radiator having a feeding pad electrically connected to a feeding portion of a main board of the terminal and at least one ground pad disposed in a position different from that of the feeding pad for selectively establishing an electrical connection to a ground portion of the terminal, and a switching element, commonly connected to the at least one ground pad of the antenna radiator, for selectively establishing an electrical connection to the ground portion by a switching operation. The antenna radiator changes a shape of the antenna radiator by using the selective electrical connection of the ground portion so as to have various operational frequency bands and radiation properties.