53results about How to "Radiation stable" patented technology

There is provided a light-emitting apparatus with favorable radiation light intensity, which is excellent in light extraction efficiency, color temperature and color rendering property. The light-emitting apparatus includes a light-emitting element, a base body having, on its top surface, a placement portion for emplacing thereon the light-emitting element, a frame body attached to the top surface of the base body so as to surround the placement portion, a light transmitting member disposed inside the frame body so as to cover the light-emitting element, and phosphors contained in the light transmitting member, which performs wavelength conversion on the light emitted from the light-emitting element. The light transmitting member has a pre-cured viscosity ranging from 0.4 to 50 Pa.s.

An antenna system is assembled to a dielectric medium on a vehicle and is spaced from an electrically conductive member so as to allow for enhanced antenna performance. The dielectric medium has first and second surfaces and a dielectric thickness between the first and second surfaces. An antenna is mounted to the first surface of the dielectric medium for receiving and / or transmitting signals. An electrically conductive member is mounted to the second surface of the dielectric medium for providing a floating ground that forms a capacitive coupling with the antenna. The electrically conductive member is dielectrically isolated from vehicle electrical ground.

The invention discloses a back point contact crystalline silicon solar cell and a preparation method thereof. The front surface of the solar cell is passivated by a silicon nitride / alumina double-layer film, the back surface of the solar cell is passivated by an alumina / silicon nitride double-layer film, and the back surface conducts current by point contact. The preparation method comprises the following steps: preparing the silicon nitride and the alumina, opening pores on the alumina / silicon nitride on the back surface, and removing an affected layer. The solar cell has the advantages of good surface passivation effect, good ultraviolet (UV) radiance resistance performance, high photoelectric conversion efficiency and the like, the back surface enhances internal reflection on the infrared light, and the front surface double-layer anti-reflection coating reduces surface reflection.

The present invention relates to an ultra-wideband (UWB) antenna, which comprises: a rectangular aperture portion, formed from a ground plane of a printed circuit board and having an aperture; and a co-plane feeding structure, having a horizontal portion and a vertical portion, wherein the vertical portion is perpendicular to the horizontal portion, and the vertical portion is disposed in the aperture and connected with an external terminal. The ultra-wideband (UWB) antenna of the present invention can receive the wireless signal with 3.1˜10.6 GHz band, and have a very compact area (13 mm×23 mm) and is easy to be mass produced. Furthermore, a parasitism element can be added into the co-plane feeding structure, so as to reject the in-band interferences from the existing systems like 5˜6 GHz signals of wireless LAN.

The present invention provides an improved process and an apparatus for producing collimated UV radiation for exposing printed circuit boards. The process consists in shortening the optical length of the downstream optics by dividing the UV radiation over many radiation sources, and in distributing the UV radiation uniformly on the substrate by using a scanning slide.

The invention discloses anti-radiation lithium-aluminum-silicate system low-expansion window glass and belongs to lithium-aluminum-silicate system glass ceramics. The glass is prepared from, by mass, 2.5-8.5% of Li2O, 16.2-26% of Al2O3, 40-71.8% of SiO2, 0.8-4.6% of TiO2, 0.6-3.7% of ZrO2, 1.3-7% of P2O5, 0.7-3.1% of F-, 0.7-3.9% of CeO2, 1.8-6.9% of B2O3, 0.5-3.5% of Na2O, 0.4-3% of K2O, 0.6-4.5% of MgO, 0.2-5.2% of CaO, 0-3.7% of SrO, 0-3% of BaO, 1.9-8.2% of ZnO, 0-1.2% of Cl- and 0-1.3% of SO42+. The invention further provides a machining process of the anti-radiation lithium-aluminum-silicate system low-expansion window glass. The window glass has high transmission, high strength, good in cold-heat impact resistance, small expansion coefficients and anti-radiation stability, can be widely applied in the aerospace field such as a transparent observation window of a spacecraft.

The invention discloses an infrared radiation coating. The infrared radiation coating is formed by mixing a solid material with a liquid material based on a weight ratio of 1:1, wherein grain sizes of the components of the coating are from 100 nanometers to 2 microns; the liquid material is an adhesion agent; and the solid material comprises the following components in percentage by weight: 45-75percent of blackening agent, 20-45 percent of zircon sand and 0-15 percent of aluminum oxide. The grains sizes of the principal components of the coating are from 100 nanometers to 2 microns, so thatthe radiation property of the coating is improved and the service life of the coating is prolonged. The radiance (Epsilon) of the coating is higher at a high temperature of 1,000-1,400 DEG C and can reach more than 0.9; and even at the temperature of 1500 DEG C, the stable radiation still can be maintained and the normal total emissivity of the coating still can reach 0.87; meanwhile, the infrared radiation coating can be applied to different heating types of kilns.

Disclosed are a device and a method for measuring air-solid fluidized bed particle mixture. The device comprises a microwave reflecting screen (7) set on the two sides of the fluidized bed (1); a microwave transmitting device is comprised with cascading the microwave generating device (4), a transmitting antenna (5) and a waveguide (6), wherein the waveguide (6) is installed in the middle of the microwave reflecting screen (7); a microwave receiving and processing device is comprised with an optical imaging object lens (8), a infrared probe (9), an amplifier (10) and a computer (11), wherein the optical imaging object lens (8) is locate on the other side of the fluidized bed (1) between two microwave reflecting screens (7). The method comprises that the microwave transmits to the fluidized bed layer via the guidance of the antenna and the waveguide; the tracking particles with polar H2O molecule are heated and employs the optical imaging object lens to receive the infrared radiation power distribution graph and reflect it to the infrared probe.

An antenna system is provided that includes an antenna having an elongated conducting segment, such as a metal rod. An anisotropic metamaterial surrounds the elongated conducting segment of the antenna. The presence of the metamaterial remarkably expands the VSWR<2. An example antenna is a monopole antenna, such as a quarter-wavelength monopole antenna, surrounded by the metamaterial.

An antenna module mainly includes at least one antenna capable of radiating signals of two frequencies, a grounding portion, and at least one isolation metal sheet capable of isolating signals of a frequency generated by different antennas from each other to avoid interference. The antenna module is integrally formed, which can reduce the volume of the antenna module, and provide a stable radiation pattern and broadband and multi-band functions.

Disclosed herein is a high-density chip scale package which is capable of increasing circuit density and expanding a circuit-formable zone. The high-density chip scale package comprises a die having a circuit pattern formed thereon, and a printed circuit board adapted for mounting the die thereon. The printed circuit board has an area 100% to 150% as large as an area of the die, and the printed circuit board has a circuit pattern formed thereon. On the die is mounted a heat sink for radiating heat from the die. Between the printed circuit board and the heat sink is filled an encapsulant for securely connecting the printed circuit board and the heat sink and shielding the printed circuit board from the outside.

The invention provides a patch antenna with a reconfigurable directional diagram. The patch antenna comprises a microstrip resonator group, a first dielectric plate, a metal floor, a second dielectricplate and a switchable feed network which are sequentially stacked from top to bottom; and the antenna also comprises a radiation patch which works in a high-order mode TM02 and a TM20, wherein the radiation patch is placed above a microstrip resonator group in a suspended manner. The microstrip resonator group is composed of a first microstrip resonator and a second microstrip resonator which are orthogonal to each other; and the feed network is used for feeding the first microstrip resonator and / or the second microstrip resonator. The antenna has the advantages of low profile, light weight,enough bandwidth, simple structure, simplicity in operation, beam reconfiguration, stable radiation and the like; a communication system can realize reconstruction of three beams by controlling a feed conduction path of the feed network under the condition of not changing a hardware structure and a station layout; and the requirements of different application scenes can be met.

The invention relates to a thread (4, 5) for producing fabrics (2) for insect screens (1), comprising a core which has a coating (11) that comprises a heat-activatable adhesive in order to bond to itself or to other threads of the fabric (2), said core having a higher melting point than the adhesive; to a fabric (2) for insect screens (1) with a mesh (7) web structure, comprising warp threads (4) and weft threads (5) which are connected to one another by means of adhesive at node points (6); to an insect screen (1) comprising a frame (3) and a fabric (2) which is stretched by means of the frame (3); and to a method for producing fabrics (2) for insect screens (1), having the steps of a) providing threads (4, 5) as warp threads (4) and weft threads (5), b) weaving a fabric (2) using the warp threads (4) and weft threads (5), and c) heating the fabric (2) to a temperature which is higher than the melting point of the adhesive and lower than the melting point of the core in order to produce bonds between the warp threads (4) and the weft threads (5) at the thread node points (6). The aim of the invention is to provide such a thread which can be processed into an transparent fabric (2) for insect screens (1) in a particularly efficient manner. This is achieved in that the coating (11) comprises hydrophobic repellents.

The invention discloses a 5G antenna and a radiation unit thereof, the radiation unit comprises two groups of polarized orthogonal dipoles, each group of dipoles comprises two radiation arms which areoppositely arranged at an interval, and each radiation arm is provided with a first expansion branch knot and a second expansion branch knot which are arranged at an interval. The radiation unit canrealize expansion of a working frequency band and has good radiation performance. In this way, the 5G antenna adopting the radiation unit is good in radiation performance.

The present invention provides a compound represented by the following formula (I):whereinR1 and R2 each independently designates an alkyl group of 1 to 12 carbon atoms or a cycloalkyl group of 5 or 6 carbon atoms or R1 and R2 form together with the carbon atom to which they are attached a cycloaliphatic ring of 5 or 6 carbon atoms,Si* represents an organopolysiloxane residue bonded via a silicon atom of this residue to the oxygen shown in formula (I), or a silane group SiR4R5R6, wherein R4, R5 and R6 each independently designates an alkyl group of 1 to 12 carbon atoms, a cycloalkyl group of 5 or 6 carbon atoms or an aryl group of 6 to 10 carbon atoms, andR3 designates a hydrogen atom or a group represented by the following formula (II)whereinR7 and R8 each independently designates an alkyl group of 1 to 12 carbon atoms or a cycloalkyl group of 5 or 6 carbon atoms or R7 and R8 form together with the carbon atom to which they are attached a cycloaliphatic ring of 5 or 6 carbon atoms, andSi** represents an organopolysiloxane residue bonded via a silicon atom of this residue to the oxygen shown in formula (II), or a silane group SiR9R10R11, wherein R9, R10 and R11 each independently designates an alkyl group of 1 to 12 carbon atoms, a cycloalkyl group of 5 or 6 carbon atoms or an aryl group of 6 to 10 carbon atoms,a method to produce this compound and the use thereof as photoinitiator and / or photosensitizer.

A dual-polarized duplex antenna includes a top-layer dielectric substrate; a metal reflective ground plate below the top-layer dielectric substrate; vertically-placed duplex baluns for duplexing operation between the top-layer dielectric substrate and the metal reflective ground plate; and four dipole arms horizontally printed on an upper surface of the top-layer dielectric substrate. Each of the duplex balun includes a vertical dielectric substrate, a balun feedline printed on a front side of the vertical dielectric substrate, and a ground plane with a printed slot line printed on a reverse side of the vertical dielectric substrate. The balun feedline includes a low-pass filter, a high-pass filter and a microstrip feeding structure serving as a connection. The low-pass filter and the high-pass filter are located on two sides of the slot line, and are connected together by the microstrip feeding structure.

The invention provides an ultra-wideband planar antenna array applied to a millimeter wave communication system. The planar antenna array is composed of a plurality of antenna units arranged at equal intervals and a microstrip feed network. The antenna unit sequentially comprises a radiation patch, a first dielectric substrate, a bonding layer, a metal ground, a second dielectric substrate and a microstrip feeder line from top to bottom; the radiation patch is connected with the metal ground through four metal holes penetrating through the first dielectric substrate and the bonding layer; according to the design, the antenna unit can work in a dipole mode besides working in a patch mode. In the array environment, due to the mutual coupling effect between the units, another new medium resonance mode is excited at the same time. Therefore, the antenna unit provided by the invention can work in three resonant modes at the same time, so that the planar antenna array can realize ultra-wide working bandwidth, and the radiation in the working band is stable.

The invention relates to a method for preparing fluorescence silk fibers from a small soluble organic molecule. The small soluble organic molecule 5-oxo-3,5-dihydro-2H-thiazole [3,2-a] pyridine-7-carboxylic acid (TPCA) or 5-oxo-3,5-dihydro-2H-thiazole [3,2-a] pyridine-3,7-dicarboxylic acid (TPDCA) is used as a fluorescence source, the silk fibers are soaked in a fluorescence source water solution after being degummed, TPCA is combined with and adsorbed to silk fibroin macromolecules at the room temperature or the high temperature of 85 DEG C by adjusting the system pH value, and TPCA and silk fibroin macromolecule chains are fixedly combined through the fixation action of didodecyl dimethyl ammonium chloride (DDTAC) to prepare the small organic molecule fluorescence silk fibers which are nontoxic and good in biocompatibility.

A power supply device of a lighting system using microwaves includes: a high-voltage transformer for converting general-purpose AC power into high-voltage AC power and outputting the high-voltage AC power; and a voltage multiplier unit for converting high-voltage AC power into high-voltage DC power , increasing the frequency of the DC power current, and outputting the DC power with the increased frequency. Since the frequency of electric power applied to the magnetron is increased to eliminate the flicker phenomenon, stable light can be radiated to the outer space.

The invention provides a high-isolation dual-band polarized reconfigurable antenna based on an SIW (substrate integrated waveguide) technology, which comprises a feed layer structure, a radiation layer structure and a fan-shaped branch direct-current bias structure, and is characterized in that the radiation layer structure is bonded above the feed layer structure in an aligned manner through silver paste; the fan-shaped branch direct-current bias structure for realizing antenna direct-current bias is arranged on the feed layer structure, and the feed layer structure comprises a substrate integrated waveguide feed layer metal cavity which is composed of a plurality of first metal through holes, an upper metal floor and a lower metal floor, wherein the upper metal floor and the lower metal floor are located at the upper end and the lower end of the feed layer structure respectively. The upper metal floor is provided with a polarization reconfigurable slot, and the radiation layer structure comprises a substrate integrated waveguide radiation layer metal cavity formed by a plurality of second metal through holes penetrating through the radiation layer structure; the antenna provided by the invention has the advantages of double frequency bands, high isolation, directional radiation and reconfigurable polarization.

The invention discloses a thermal-infrared-spectrum atmospheric extinction measurement method and device. The device comprises a normal-temperature surface source black body. A plane mirror is disposed right ahead the normal-temperature surface source black body in a light transmission direction; and a Fourier spectrometer is disposed at the right side of the plane mirror in a light transmission direction. An aperture diaphragm is arranged between the normal-temperature surface source black body and the plane mirror in the light transmission direction and is arranged at an optical chopper. A chopper plate of the optical chopper is arranged in front of the normal-temperature surface source black body; and the center of the chopper plate is located at the right side of the normal-temperaturesurface source black body. A neutral infrared attenuation sheet is also arranged on the chopper plate. According to the invention, the atmospheric extinction is inverted by measuring atmospheric radiation spectra at different zenith angles, so that the dependence on standard satellites is eliminated and the infrared atmospheric extinction spectral distribution can be obtained simply, convenientlyand efficiently. The high-precision measurement of spectral atmospheric extinction can be realized; and a problem that the calibration black body and atmospheric radiance exceed the linear dynamic range of a measuring instrument is solved.

The invention provides a shielding device for controlling an irradiation dose of an electron beam. The shielding device comprises a bottom plate, a support, a plurality of supporting columns, whereinthe supporting columns are fixed above the bottom plate, a liquid container arranged on the support and comprising a container main body and a container top plate, a fixing piece used for fixing the container top plate on the container main body in a height-adjustable manner, and optionally, a liquid level meter disposed on an outer side of the container main body, wherein a liquid is contained between the container main body and the container top plate. The invention also provides a shielding method for controlling the irradiation dose of the electron beam.

The invention discloses a miniaturized teapot-shaped ultra-wideband antenna with a frequency range of 3.0-28.7 GHz. The miniaturized teapot-shaped ultra-wideband antenna comprises a dielectric substrate, a radiation patch, a microstrip feeder line and a truncated grounding plate. The radiation patch adopts a circular structure to load a rectangular branch knot and an L-shaped branch knot structure; and the microstrip feeder line adopts a stepped structure, and the grounding plate adopts a triangular corner cut structure, namely triangular corner cut is performed on the left upper corner and the right upper corner of the grounding plate respectively. According to the invention, the circular structure is adopted to load the rectangular branch knot and the L-shaped branch knot to serve as the radiation patch, the circular structure achieves the basic wideband performance, the rectangular branch knot expands the high-frequency range, the L-shaped branch knot expands the low-frequency range, the three structures are combined together, and the bandwidth of the ultra-wideband antenna is expanded; the micro-strip feeder line adopts the stepped structure and is used for impedance matching; due to a corner cut grounding plate structure, a return loss curve becomes smoother, and radiation is more stable; and the antenna provided by the invention has the advantages of a wide frequency band range, a simple structure, a good radiation characteristic and a high anti-interference capability.

The invention discloses pentamethine cyanine dye and a preparation method thereof. Advantages of long wavelength and good stability of the dye are utilized; dye protection and scintillation triggeringcan be achieved through introducing sulfydryl into the molecule to induce dynamic ring opening and closing of the dye at the physiological pH; the sulfydryl is protected through a disulfide bond so that the dye can radiate stable fluorescence, facilitating confirmation of the dyeing effect; and the disulfide bond in cells can be cleaved by intracellular high-activity sulfydryl protein in cells soas to achieve scintillation.

A method of making a reconfigurable antenna comprises the steps of applying one or more first layers of a prepreg laminate fabric to a form having a desired contour; applying a pattern corresponding to an antenna shape to the first layers of prepreg fabric; applying one or more second layers of the prepreg laminate fabric atop the pattern to form a laminate stack; curing the laminate stack; and removing the pattern to form channels in the antenna shape. The desired contour may be an aircraft skin panel or an airfoil panel. The pattern may be a polymer sheet with an applied cPLA antenna design. The curing step may be performed in a vacuum bag under the application of vacuum and heat. The removing step may be performed by heating the cured laminate stack to remove the pattern.

The present invention discloses an orange phosphor powder having a rare-earth aluminate have garnet structure, which is characterized by that its chemical composition is added with compounds of the IV and V groups elements and the stoichiometry formula of the orange phosphor powder is (ΣLn)3−xMeIVxAl5−ySiyO12−(x+y)N(x+y). Furthermore, the present invention also discloses a warm-white Light-emitting diode employing the orange phosphor powder.

The invention discloses an infrared source circuit of a carbon-sulfur determination analyzer, which comprises a constant current source Darlington pipe drive circuit, an infrared source and a direct current supply, wherein the constant current source Darlington pipe drive circuit is provided with a pulse signal input end, the constant current source Darlington pipe drive circuit is connected with one end of the infrared source, and the direct current supply is connected with the other end of the infrared source. The infrared source of the circuit is driven by the constant current source Darlington pipe drive circuit to realize the modulation of the infrared source, thereby saving the cost and the structure space of a chopping motor, simplifying the system design and more easily realizing the modulation of the infrared source; the adoption of electrical modulation has the largest advantages of no movable members, more stable radiation of the infrared source for the outside, high system accuracy, long life and low cost.