200results about How to "Reduce radiation loss" patented technology

A system and method for containing plasma and forming a Field Reversed Configuration (FRC) magnetic topology are described in which plasma ions are contained magnetically in stable, non-adiabatic orbits in the FRC. Further, the electrons are contained electrostatically in a deep energy well, created by tuning an externally applied magnetic field. The simultaneous electrostatic confinement of electrons and magnetic confinement of ions avoids anomalous transport and facilitates classical containment of both electrons and ions. In this configuration, ions and electrons may have adequate density and temperature so that upon collisions they are fused together by nuclear force, thus releasing fusion energy. Moreover, the fusion fuel plasmas that can be used with the present confinement system and method are not limited to neutronic fuels only, but also advantageously include advanced fuels.

An external mirror assembly for an automotive vehicle has a shell having an aperture. A mirror is carried by the shell, substantially occluding the aperture. The mirror assembly has a lighting element having an electroluminescent film electrically connected to a triggering device for energizing the film and illuminating the mirror assembly. The triggering device includes first and second switches for generating a series of high and low frequency pulses and a control device connected to each of the switch for triggering each of the switches to illuminate the lighting element in either a flashing or continuous pattern.

The invention relates to a method for rapidly, efficiently heating and dispensing a flowable food product, using a device preferably of limited footprint whereby removable cassettes are provided for receiving a food-containing package. The cassettes at least include a direct conduction surface and an insulating coverage that substantially reduces radiant heat loss outside the cassettes. Preferably, there is provided peristaltic pumps, each one being adapted to engage a discharge tube of the food pouch wherein the pumps have their rotor plane oriented in alignment or parallel to the axial plane of the cassettes. Cassettes are heated by low power density generating heating members, such as a thin film heater or equivalent.

An electronic device including a display unit; an array antenna including a transparent electrode material and being disposed within the display unit; and a radio frequency integrated circuit (RFIC) electrically connected to the array antenna. The array antenna includes an antenna element having first and second sides perpendicular to each other disposed slopingly at a predetermined angle with respect to one side of the display unit; and a feeding part connecting the antenna element and the RFIC.

An inverted F-type antenna apparatus is provided with a grounding conductor and an antenna element arranged on the grounding conductor so as to face the grounding conductor. The inverted F-type antenna apparatus further includes at least one coupling element provided between the grounding conductor and the antenna element so as to face the grounding conductor and the antenna element, and a connection conductor is provided for electrically connecting the antenna element with the grounding conductor at least in one place. In the inverted F-type antenna apparatus, the grounding conductor, the antenna element and the coupling element are arranged so as to be substantially parallel to each other.

A resonator structure is presented comprising a closed loop resonator having a distributed Bragg reflector for confining the light within the guiding core. In one embodiment the light is confined from both the internal and the external sides of the device forming a guiding channel (defect) or just by the external side forming a disk resonator. Although the perfectly circular shape is generally preferred, the resonator could be of any closed loop shape such as an ellipse, etc. Although not mentioned explicitly throughout the text, the Bragg reflectors can of any type of distributed reflector such as, for example, a photonic bandgap crystal where the Bragg reflector is constructed by series of holes in a dielectric material. The resonator structure can be used in various applications, such as optical filters, lasers, modulators, spectrum analyzers, wavelockers, interleave filters, and optical add drop multiplexers.

An inverted F-type antenna apparatus is provided with a grounding conductor and an antenna element arranged on the grounding conductor so as to face the grounding conductor. The inverted F-type antenna apparatus further includes at least one coupling element provided between the grounding conductor and the antenna element so as to face the grounding conductor and the antenna element, and a connection conductor is provided for electrically connecting the antenna element with the grounding conductor at least in one place. In the inverted F-type antenna apparatus, the grounding conductor, the antenna element and the coupling element are arranged so as to be substantially parallel to each other.

An impedance matching conductive via structure that is effectively constructed by selecting an outer conductor and an inner conductor diameter through analytical calculation or numerical simulation, such that impedance of the conductive via structure is matched to the impedance of the conductive signal traces of a printed circuit board. The conductive via structure comprises a conductive barrel that either connects to multiple ground planes or to multiple powers planes and serves as the outer conductor for a coaxial structure that provides a current return path and a matched impedance path of via transition, thus improving the signal transition and reducing signal reflection due to via discontinuity. Moreover, the conductive barrel of the conductive via structure also reduces radiation loss through a parallel plane structure and suppresses coupling between neighboring vias as the energy escaping through the conductive barrel and radiating to other vias is minimized.

A resonator structure is presented comprising a closed loop resonator waveguide having a width varying over the circumferential region of the resonator waveguide. The resonator structure can be used in various applications, such as optical filters, lasers, modulators, spectrum analyzers, wavelockers, interleave filters, and optical add drop multiplexers.

Layers or coats of materials with high dielectric constant or permittivity with very low conductivity are inserted in between radiofrequency (RF) coil or coil's conductive elements and the sample to enhance the signal to noise ratio (SNR), improve image contrast, and reduce the specific absorption rate (SAR) of magnetic resonance imaging or magnetic resonance spectroscopy instruments. The embodiments of the present invention can be used as an auxiliary device to the standard pre-constructed RF coils or incorporated with RF coil constructions for enhancing RF coil performances in both transmission and reception.

A high-pressure discharge lamp for motor vehicle headlamps having a mercury-free ionizable fill which consists of xenon with a cold filling pressure of at least 2 000 hPa and metal halides. The discharge vessel has a tubular section (10) which consists of a transparent ceramic and has an internal diameter which is less than or equal to 2 mm and inside which there are arranged electrodes with a spacing less than or equal to 10 mm.

The manufacture method for laser-electroabsorption modulator-analog spot converter comprises: epitaxial growing a buffer layer, a lower waveguide layer, a space layer and an intrinsic layer by turns on substrate; growing silicon dioxide on intrinsic layer with PECVD technique; removing the intrinsic layer for second growth for source zone and intrinsic layer, etching the upper / lower waveguide structure of analog spot converter; epitaxial growing for third time thin P-type indium phosphide layer and cover layer and ohmic contact layer; re-etching the single ridge strip guidewave structure for laser and electroabsorption modulator; etching isolation channel for injecting He+; removing In-Ga-As contact layer of analog spot converter; growing silicon dioxide insulation layer by thermal oxidation method; depositing polyimide onsides of said modulator; opening the electrode window and etching the electrode figure for laser and modulator; sputtering P electrode; reducing the substrate of extension plate to cleavage into die after sputtering N electrode.

In one of its aspects, the present invention relates to a fluid treatment system comprising: an inlet; an outlet; a fluid treatment zone disposed between the inlet and the outlet. The fluid treatment zone: (i) comprises a first wall surface and a second wall surface opposed to the first wall surface, and (ii) having disposed therein at least one array of rows of radiation source assemblies. Each radiation source assembly has a longitudinal axis transverse to a direction of fluid flow through the fluid treatment zone and each of the first wall surface and the second wall surface comprises a first fluid deflector element and a second fluid deflector element. The first fluid deflector element projecting into the fluid treatment zone to a greater extent than the second fluid deflector element.

The invention discloses a reversed-U-type dielectric waveguide wideband directional coupler used for a millimeter wave circuit, which is composed of two medium waveguide transmission lines and an earthing metal plate, wherein two medium waveguide transmission lines close to each other are oppositely bent, arranged separately and symmetrically at two sides of an axle wire and fixed on the earthing metal plate, so as to form an X-type structure; the coupler is characterized in that the reversed-U-type medium waveguide is used for reaching of the wideband plat coupling of the coupling section and the transition section of a coupler, and the waveguide axes of the transition section adopts hyperbolic tangent line type; the fluctuation of a coupling coefficient doesn't exceed plus or minus 0.5Db inside the frequency coverage of 6GHz, and the flat coupling property can be achieved inside wider bandwidth. Compared with the traditionally directional coupler which is completely composed of a medium mirror image line, the inverted-U-type dielectric waveguide wideband directional coupler has the advantages that transition waveguide section of the hyperbolic tangent line type is used, the metal side wall of the prior coupler which is vertical to ground in the transition waveguide section is unnecessarily used, radiation loss and metal loss are reduced, the volume of the coupler is decreased and manufacture complexity and cost are reduced, and can be conveniently produced in large quantity.

A compound material for white LED, including an inorganic phosphor, an inorganic light scatter and a polymer adhesive for interaction with a shortwave light radiated by an InGaN heterostructure. The light scatter is a nano-scale powder material formed of AIIBVI quantum dot compound in which A=Zn, Cd; B═O, S, Se, Te, and composed with (Y2-x-y-z GdxCeyDyzO3)1.5±α(Al2O3)2.5±β inorganic phosphor to form a compound material.

A dross processing system has a motor mounted to a motor support arm by a motor support carriage, and has a carriage guide which engages the motor support carriage to guide the motor along a vertical path between a raised position and a lowered position. The motor is moved by a motor height actuator connected between the motor support arm and the motor support carriage. A hood having a hood rim and a hood upper structure is configured to be engaged by the motor support carriage when moved to the raised position. When the motor is moved to the lowered position, the hood rim engages a reaction vessel upper rim. The motor support arm can rotate between a loading / dumping position and an operating position. The dross processing system can be partially automated by a microprocessor. A preferred impeller for agitating dross and a plug setting tool can be employed.

The invention discloses a planar array microwave antenna for a dual-beam traffic information detection radar; the antenna is formed by connecting one group of 20 serial planar antenna units with another group of 20 serial planar antenna units in parallel, and a central side-feed form is used for feeding to an antenna array; the planar array microwave antenna for dual-beam traffic information detection radar has the advantages that a pair of antennas can produce two beam main lobes between which an included angle, namely the included angle between the beam main lobes of the dual-beam antenna is formed, and the included angle completely meets the demands of the dual-beam traffic information detection radar; the central side-feed form is more favorable for the integration of a radar transmitting-receiving assembly and the antenna; and furthermore, the wiring length of the radar transmitting-receiving assembly can be shortened to reduce the microwave radiation loss and reduce the radar cross section area.

The filter is composed of periodic structured substrate integration wave-guide and coplanar wave-guide. Input end and output ends are setup at substrate integration wave-guide. Metal pasters are covered on upper and lower surfaces of medium substrate. There are at least two rows of metallized through holes on medium substrate. Thus, metal pasters on upper and lower surfaces are connected through the said metallized through holes. Periodic structure of coplanar wave-guide includes at least one compact type coplanar wave-guide unit, whose underside is a metal paster, in same plane. The said compact type coplanar wave-guide unit is positioned within the substrate integration wave-guide. Advantages are: small size, in favor of designing IC in millimeter microwave, realizable to traditional PCB or LTCC techniques, satisfying need of designing 3D IC in millimeter microwave, wide frequency selectivity, simple designing method, and good frequency selectivity.

Provided is a vacuum heat insulation heat fluid energy-saving running pipeline. The vacuum heat insulation heat fluid energy-saving running pipeline comprises an inner fluid pipe and a shell steel pipe, the inner fluid pipe is arranged in the shell steel pipe in a sleeved mode, the two ends of the shell steel pipe is sealed by an end sealing plate and a vacuum heat insulation layer is formed between the two pipes, and the vacuum heat insulation layer is communicated with a sealed valve. By utilizing a triple heat insulation structure, heat energy radiation loss and cold coagulation in a steam, hot water transportation process are reduced, and the problems of relatively large single (double) way heat loss, high heat loss rate and low heat utilization efficiency of an existing running pipeline are reduced.

Apparatus and method for MRI imaging using a coil constructed of microstrip transmission line (MTL coil) are disclosed. In one method, a target is positioned to be imaged within the field of a main magnetic field of a magnet resonance imaging (MRI) system, a MTL coil is positioned proximate the target, and a MRI image is obtained using the main magnet and the MTL coil. In another embodiment, the MRI coil is used for spectroscopy. MRI imaging and spectroscopy coils are formed using microstrip transmission line. These MTL coils have the advantageous property of good performance while occupying a relatively small space, thus allowing MTL coils to be used inside restricted areas more easily than some other prior art coils. In addition, the MTL coils are relatively simple to construct of inexpensive components and thus relatively inexpensive compared to other designs. Further, the MTL coils of the present invention can be readily formed in a wide variety of coil configurations, and used in a wide variety of ways. Further, while the MTL coils of the present invention work well at high field strengths and frequencies, they also work at low frequencies and in low field strengths as well.

The invention discloses a refractive index sensor based on a metal nanostructure and single-layer TMDs composite system and a method. According to the invention, a composite structure formed by clinging a metal nanostructure and a single-layer transition metal sulfide is adopted, and a local surface plasmon polariton refractive index sensor which can be almost independently controlled is realizedin a visible light waveband; local surface plasmon of a metal nanostructure and excitons of a TMDs two-dimensional material are fused, and the advantages of the local surface plasmon and the excitonsare combined, so that the extremely good sensing performance is achieved, and the index requirements of a novel sensor can be met; the scattering spectrum is enhanced, so that the effect of enhancingthe signal-to-noise ratio is achieved; and when the external environment changes, the spectral line width is narrowed relative to a single metal nanostructure, and rich structural information is extracted, so that high-sensitivity sensing is realized; the size of the device can be reduced, and the sensor has potential application in a highly integrated local surface plasmon sensor. The refractiveindex sensor has the advantages of simple structure, small volume, high signal-to-noise ratio, high sensitivity and quick response.

The invention discloses a solar energy collection device for photo-thermal power generation. The device comprises a steel structural frame, a support frame, a heat collector, a light reflecting film and an aluminum base board, wherein the heat collector is supported above the steel structural frame through the support frame; the aluminum base board is connected with the steel structural frame; and the light reflecting film is attached to the aluminum base board. The solar energy collection device has low production cost and a good heat collecting effect.

The invention discloses a Q-band superspeed wireless local area network indoor access antenna which comprises a radiating element and a feeder line part. The radiating element and the feeder line part are printed on a same medium substrate through the printed circuit technology. The radiating element is formed by printed umbrella-shaped symmetrical dipoles and a printed guide unit, the substrate is used for integrating a waveguide to achieve differential feed, an inductive window structure is loaded to achieve broadband impedance matching, and mutual connection with an external circuit can be achieved through the antenna mode by adopting a coplanar waveguide changeover structure or a substrate integrated waveguide changeover structure. Considering the requirements of the new generation Q-band superspeed wireless local area network standard and the related millimeter wave indoor communication system standard 802.11aj (45GHz), the access antenna which is provided with a wide working band (42.4-48.5 GHz), and wide beam coverage larger than or equal to 120 degrees in a main tangent plane and is capable of being integrated with a plane active millimeter wave circuit is achieved through the printed circuit technology.

The invention provides a suspended microstrip antenna array for 60GHz millimeter wave communication and an antenna thereof. The antenna array comprises antenna units and a feed network. The antenna units are arranged in an upper and lower two-row mode; the number of the antenna elements is 2*(2n), and n is a positive integer; the feed network comprises impedance transformers, coplane duel-wires, coplane waveguides and power dividers connected with the coplane duel-wires and the coplane waveguides; each antenna element is connected with one impedance transformer; the impedance transformers of the uplink antenna elements of the antenna units and the impedance transformers of the downlink antenna elements are arranged oppositely; the coplane duel-wires are connected with the antenna units via the impedance transformers; one power divider is connected at the axial central position of each coplane duel-wire; and one end of the coplane duel-wire is connected with the power divider and the other end is provided with a feed port. The suspended microstrip antenna has the advantages that the bandwidth is wide, the radiation loss is small, and integration with a plane millimeter wave circuit is easy.

A multi-band flat antenna that shows excellent radio characteristics in each of multiple different frequency bands. In a patch antenna, a plurality of flat antenna patterns for different frequency bands are formed on a dielectric substrate. The dielectric substrate has different plate thicknesses in each of the regions where the flat antenna patterns are formed.

The invention discloses an LNOI (Lithium Niobate on Insulator) suspended spot size converter and a process implementation method thereof. The LNOI suspended spot size converter comprises an optical fiber fixing groove, an optical coupling end face, a SiO2 cantilever beam supporting structure, a SiO2 suspended optical waveguide, an LNOI conical core layer, a transition structure, an LNOI optical waveguide core layer, a SiO2 cladding and a chip substrate. The LNOI conical core layer is embedded in the middle of the SiO2 suspended optical waveguide, and the LNOI optical waveguide core layer is located in a space defined by the transition structure and the SiO2 cladding; the SiO2 suspended optical waveguide, the transition structure and the SiO2 cladding are connected in sequence, and the embedded LNOI conical core layer is in accurate butt joint with the LNOI optical waveguide core layer. According to the converter, transverse and longitudinal simultaneous conversion of the optical mode size in the LNOI optical waveguide is achieved, the requirement for matching a submicron LNOI optical waveguide with the optical fiber mode size can be met, and the mode converter is suitable for botha ridge-shaped LNOI optical waveguide and a rectangular LNOI optical waveguide.

The invention provides a broadband low-sidelobe series-fed CTS (Continuous Transverse Stub) antenna, and aims to provide a CTS antenna which is high in gain and efficiency, good in standing wave, high in radiation capability and obvious in grating lobe suppressing effect. The broadband low-sidelobe series-fed CTS antenna is implemented according to the technical scheme that a radiation array (1) is provided with a plurality of hollowed-out air elongated slots (12) with a two-stage stepped transition structure, a split waveguide power divider (13) is arranged above a boundary step surface, and each waveguide power divider divides the corresponding air elongated slot into two identical two-stage stepped transition channels (14); and in operation, a feed waveguide cavity (2) at the bottom of the radiation array provides quasi-TEM waves through a hollowed-out inclined air cavity (22), and the quasi-TEM waves sequentially flow into each antenna radiation unit in the radiation array (1) from left to right and radiate into the natural space from the air elongated slot to the waveguide power divider and then to the two-stage stepped transition channels, thereby enabling an antenna directional pattern to realize low sidelobe within a broadband along a radiation unit distribution surface. The antenna provided by the invention is particularly suitable for acting as a broadband low-sidelobe series-fed array antenna.

The invention discloses a method for designing a Taylor-index composite non-equidistant modular array antenna, and relates to a non-equidistant array antenna. The method comprises the following steps: setting parameters required by a system according to an integrated gain requirement, and respectively substituting a non-equidistant Taylor array and an index array to obtain the distribution positions of two groups of array elements; designing a cosine weighting function, and combining the distribution positions of the two groups of array elements to generate an array element distribution position configuration of a Taylor-index composite array; dividing an array antenna into eight modules in a proportion of 4:3:2:1 according to the total quantity of the array elements, and loading an excitation amplitude in the same proportion for the array elements in the modules to obtain the Taylor-index composite non-equidistant modular array antenna. By selecting an appropriate cosine weighting function, the minor lobe level of a radiation pattern can be controlled as required; a modular feed network can be realized by using a phase-impedance matched proportional power divider, so that a simple feed network is maintained, the radiation loss is reduced, and the design cost and the manufacturing cost are reduced; pattern integration can be flexibly regulated as required.