41results about How to "Efficient radiation" patented technology

The invention discloses a compact multi-beam antenna array with high and low frequencies of filtering oscillators in interlacing arrangement. The antenna array comprises first and second subarrays arranged on a substrate, the first and second subarrays work in first and second frequency ranges respectively and are arranged in an interlacing manner, array elements of one subarray are distributed in spaces among array elements of the other subarray dispersely, the first subarray is formed by a first filtering antenna unit of at least one applied-loss-free circuit, and the second subarray is formed by a second filtering antenna unit of at least one applied-loss-free circuit. The whole array is formed by interlacing arrangement of oscillators in two frequency ranges, and compared with a design in which the high-frequency oscillators and low-frequency oscillators are arranged separately, the size can be reduced; and compared with design of interlacing oscillator array without a filtering characteristic, mutual coupling between the oscillators is lower, and a high isolation performance can be maintained.

The invention relates to a CZ method silicon single crystal growth furnace quartz crucible carbon protection crucible and a manufacturing process thereof. The CZ method silicon single crystal growth furnace quartz crucible carbon protection crucible comprises an upper crucible edge, a lower crucible edge and a crucible support, wherein the upper crucible edge and the lower crucible edge comprise green bodies and matrix carbon, the surface is provided with a silicon carbide coating, each green body is formed by the superposition of two-dimensional carbon fiber fabrics or is formed by a quasi-three-dimensional punched carbon fiber felt body, and the weight is not lower than 40 percent of weight of the protection crucible; the matrix carbon comprises carbon resin and chemical vapor depositioncarbon, wherein the content of the chemical vapor deposition carbon is not higher than 30 percent of total weight of the product; the density of materials of the upper crucible edge and the lower crucible edge is higher than or equal to 1.3g/cm <3>; holes with the diameters ranging from 5 to 30 mm are uniformly distributed on the upper crucible edge and the lower crucible edge, the walls of the holes and the inner surfaces of the crucible edges are provided with silicon carbide coatings, and the thickness ranges from 10 to 100 mu m; and the crucible support comprises high strength and high purity graphite and surface deposited carbon coatings, the density thereof is higher than or equal to 1.7g/cm <3>, and the thickness of the surface deposited carbon coatings ranges from 10 to 100 mu m.

The package has a base body (51) with a mounting portion for mounting a light-emitting unit. A frame body is joined to an outer edge of the body (51) to surround the portion. A wiring conductor has its one end formed on an upper surface of the base body, to electrically connect an electrode of the light emitting unit. The light transmitting unit (53) is inside the frame body to cover the light emitting unit. - Independent claims are also included for the following: - (A) a light-emitting apparatus comprising a package for housing a light emitting unit - (B) an illumination apparatus constructed by setting up a light-emitting apparatus in a predetermined arrangement.

The invention belongs to the technical field of antennas, and discloses a ridge gap waveguide based circularly polarized antenna. The circularly polarized antenna is sequentially provided with a feed network layer and a radiation layer from bottom to top, and is characterized in that the feed network layer comprises a lower metal floor, periodically arranged metal pins, a power distribution metal ridge transmission structure and four through holes; the power distribution metal ridge transmission structure provides phase output with pairwise phase difference being 180 degrees according to the arrangement of four slot antennas; the slot radiation layer comprises an upper cover metal plate, four ring-shaped slots with braches and four through holes; and the four ring-shaped slotted slots with branches are distributed in a central symmetry manner, and the four slot antenna units radiate circularly polarized waves respectively and form a 2*2 circularly polarized antenna array. The impedance bandwidth of the antenna reaches up to 24.5%, the axis ratio bandwidth reaches up to 11.4%, and the gain in the frequency band can also meet requirements of practical applications. The ridge gap bandwidth based circularly polarized antenna stays at a high level in antennas of the same kind, and meets requirements of simple structure, small size and easy processing for antennas in practical applications.

The invention discloses an extremely-low-frequency high-power transmitting system. The system comprises a high-precision exciter, a signal processing unit, a transmitting host, a change-over switch, a tuning device and a dummy load; the tuning device is connected with a transmitting antenna; the transmitting host comprises two power amplifier units which are arranged in a dual-frequency-band dual-power-bridge cascading mode, and the two power amplifier units are used for conducting high-power signal synthesis on the extremely-low-frequency band and the ultra-low-frequency band on a power amplifier circuit of the same transmitting host. According to the invention, the high-power extremely-low-frequency emission host with extremely-low-frequency and ultra-low-frequency dual-band dual-power bridge cascade power synthesis is designed, and efficient synthesis of extremely-low-frequency and ultra-low-frequency (0.1-300Hz) dual-band 500kW high-power signals is realized on the same main power circuit. A combined tuning method of direct coupling, capacitance tuning and matching tuning is designed to perform matching tuning with a horizontal low-rack transmitting antenna as long as hundreds of kilometers, so that impedance matching tuning of a full-frequency-point horizontal low-rack transmitting antenna within a wide frequency range of 0.1Hz to 300Hz and efficient radiation of high-power extremely/ultra-low frequency signals are realized.

The invention discloses an infrared radiation automatic door induction system. The infrared radiation automatic door induction system is composed of an infrared emission device, an infrared detectiondevice, a circuit processing system and a mechanical control system; the infrared emission device emits infrared light after being powered on, the infrared light is received by the infrared detectiondevice, converted into an electric signal through the circuit processing system and transmitted to a mechanical system, and finally the mechanical system converts the received electric signal into a mechanical signal to control opening and closing of an automatic door. According to the infrared radiation automatic door induction system, a corrugated structure of the spherical graphene is utilized,under the cohesion and combination effect of macromolecules and the cooperation of micromolecule high-radiation inorganic particles, multi-stage infrared rapid infrared emission is achieved, and theinfrared radiation automatic door induction system has the characteristics of being low in cost, easy to manufacture, resistant to interference, high in weather resistance and the like.

The invention discloses an infrared radiation insulating coating and paint and a preparation method thereof. The infrared heating coating is mainly prepared from the following components in parts by weight: 1 part of spherical graphene, 0.02 to 0.12 part of graphitizable macromolecular oligomer, 1 to 4 parts of polyaluminosilicate, 0.5 to 2 parts of hyperbranched carbosilane and 0.01 to 0.1 part of peroxide cross-linking agent. According to the infrared heating coating, by means of the corrugated structure of spherical graphene, under the cohesion and combination effect of macromolecules, theinsulation effect of an insulation aluminum-silicon compound and the cooperation of small-molecule high-radiation inorganic particles, the multi-stage infrared heating is achieved. By means of the infrared heating coating, the heating efficiency is greatly improved; meanwhile, in the field of infrared radiation heating, the comfort of a human body is improved, and the energy consumption is greatlyreduced.

The invention discloses a high efficiency broadband dual polarization cavity array antenna. A rectangular open waveguide antenna is used as an array unit form, feed is performed through a strip wire,dual polarization feed is realized by a laminated structure of a multilayer PCB substrate, moreover, the strip wire is utilized to form a power divider feed network to expand a cell structure to a 16*4 antenna array, weighted processing based on the Chebyshev principle is performed on the power divide feed network to suppress the antenna sidelobe level, the antenna array is fed by an SMA connectorto improve portability of the antenna, and conversion from the strip wire to a coaxial wire is designed at a tail end of the feed network. The antenna is advantaged in that needs of a microwave system for polarization diversity are met, and electromagnetic performance superior to conventional antennas can still be obtained under limited physical conditions.

An alert device and method include an elongated cavity (306) and a loudspeaker (302) coupled to a first end portion of the cavity wherein sound produced by the loudspeaker is directed through the cavity to provide an audible sound. The cavity and the loudspeaker are configured and dimensioned to provide the audible sound substantially at an anti-resonant frequency (Fb) between first and second resonant frequency peaks for system impedance in a response spectrum for the loudspeaker and the cavity.

The invention relates to a preparation method of an anti-aging uvioresistant shading net, and belongs to the technical field of polymer material preparation. The method comprises the steps that cottonand water are mixed, then, the mixture is mixed with cotton stalk, citric acid and the like for performing microbial fermentation, then, a fermentation product is subjected to microwave treatment, grinding and screening are performed to obtain a screened product, finally, the screened product, polyethylene and other auxiliaries are mixed and extruded, and spinning drying is performed to obtain the anti-aging uvioresistant shading net. The cotton is hydrolyzed, a large number of hydroxyls, carboxyls, carbonyls and other epoxy groups are generated on the surface of fiber, cotton fiber is stuckto other molecules in the shading net, other molecules in the shading net are wrapped, the organic functional groups are used for improving the bonding strength, the shading net is difficultly peeledoff, zinc ions are complexed to the cotton fiber, zinc oxide grows on the cotton fiber molecules through nanoscale particles, the uvioresistant capability of the shading net is enhanced, and the goodapplication prospect is achieved.

A liquid processing apparatus has an ultraviolet ray discharge tube configured in a processing liquid flow path from an influx to an outflux of a processed liquid and used for irradiating ultraviolet rays of the processing liquid flowing past the flow path, the discharge tube has a hollow part penetrating through the interior thus to form a tube, a ferrite core is arranged at the hollow part, and one or more induction coils wraps the periphery of the discharge tube. Therefore, through applying higher voltage to the periphery of the discharge tube, discharge is easy to occur. Additionally, because the discharge space is disposed close to the surface of the discharge tube, the radiation quantity of vacuum ultraviolet rays for effectively resolving organic objects can be increased. Moreover, because a wide gap can be ensured between the ferrite core and the induction coils, stable and continuous discharge can easily occur. In addition, the ferrite core can be simply cooled, and thus the ultraviolet radiation efficiency is optimized.

The present invention relates to an LED lighting heat sink which is capable of being manufactured from an aluminum plate by a relatively simple processing method, and efficiently performs heat radiation even when applied to and installed in a closed space. The LED lighting heat sink according to the present invention is an LED lighting heat sink (1) where an LED element mounting surface (2) and a radiation side surface (3) are formed integrally or continuously on one sheet metal by drawing. The heat sink of the present invention comprises radiation surfaces in a continuous manner, which are formed on a cylindrical body to face any three-dimensional direction.

The invention discloses a directional sound wave disperser which comprises a controller and a sounder. The controller comprises a power amplifier module, and the power amplifier module is a single-stage power amplifier and is used for carrying out power amplification on an audio signal. The controller further comprises a signal processing module which is connected with the input end of the power amplifier module and used for processing audio signals. The sounder comprises a high pitch head and a multi-fold horn, and the high pitch head is connected with the output end of the power amplifier module. A single-stage power amplification module is adopted to perform power amplification on the audio signal, so that the crossover distortion can be effectively eliminated, and the output efficiencyis improved. The multi-fold horn is adopted to output sound signals, so that sound waves are radiated more efficiently, and nonlinear distortion of the sound signals is reduced.

The invention discloses heat dissipation glass with low melting point and high infrared emissivity, wherein the heat dissipation glass comprises the following components in percentage by mole: 60 to 80 mol% of TeO2, 1 to 3 mol% of Al2O3, 10 to 20 mol% of ZnF2, 5 to 15 mol% of Na2CO3 and 1 to 5 mol% of V2O5. According to the invention, the infrared radiance of the obtained heat dissipation glass ata waveband of 8-14 [mu]m is more than 0.90, especially the infrared radiance of the heat dissipation glass is up to 0.965 when the molar doping amount of V2O5 reaches 3 mol%, the heat dissipation performance is good, and good visible light transmittance can be kept; and the melting point of the heat dissipation glass is low, the temperature in the melting process only needs 800-900 DEG C, the melting time is short, the whole process is carried out in the air atmosphere, and the process is simple and easy to implement.