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419results about How to "Large power capacity" patented technology
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Printing antenna with baseplate integrated waveguide feeder
ActiveCN101075702ASealing is simple, convenient and economicalTo achieve the purpose of sealingRadiating elements structural formsRadarEngineering
A chip integrated waveguide feeding print antenna is composed by a chip with its two metal sides being transfixed with metal through holes in array. The two metal sides are in axial symmetry. There is an intergrading section to one side of the waveguide centerline on two surface of the chip linking with transmission line. To the outer end of the intergrading section links a vibrator antenna. To the opposite side of the intergrading section on the waveguide links a micro-strip intergrading commutator linking with micro-strip transmission line.
Owner:南京易太可通信技术有限公司
Printing antenna with baseplate integrated waveguide feeder
ActiveCN101075702BSealing is simple, convenient and economicalTo achieve the purpose of sealingRadiating elements structural formsRadarEngineering
Owner:南京易太可通信技术有限公司
Single-inductor-multiple-output regulator with auto-hopping control and the method of use
ActiveUS20110043181A1Minimized cross-regulationLarge power capacityDc network circuit arrangementsDc-dc conversionSwitching frequencyInductor
A switching regulator is provided herein comprising a voltage source, a plurality of switching elements, an inductive element, and a controller. The controller coordinates the plurality of switching elements as to sequentially and periodically switching the inductive element to generate a plurality of regulated DC voltages. The controller adjusts a switching frequency of the regulator in accordance with at least one characteristic of a load current.
Owner:THE HONG KONG UNIV OF SCI & TECH
Power distribution network fault arc extinction method by connecting neutral point to the ground through multi-level converter
ActiveCN104218563AReduce switching frequencyLarge power capacityEmergency protective arrangements for limiting excess voltage/currentHarmonic reduction arrangementEngineeringTotal current
The invention relates to a power distribution network fault arc extinction method by connecting a neutral point to the ground through multi-level converter. The power distribution network fault arc extinction method is characterized in that the cascade H-bridge multi-level converter is adopted and directly connected at the position of the neutral point of a power distribution network through a reactor; at the initial moment when the power distribution network has a single-phase earth fault, synthetic operation is conducted to generate offset currents needed to be injected (img file='69356dest_path_image001. TIF'wi'19' he'=25' / ), then the offset currents are quickly put into the multi-level converter, the multi-level converter is controlled by aid of the current tracking control algorithm and the PWM (Pulse-Width Modulation) modulation strategy to generate offset currents (img file='652784dest_path_image001. TIF'wi'19' he'=25' / ), and the offset currents are put into the neutral point of the power distribution network so as to compensate grounding total currents of the fault point. In addition, the fault phase voltage is forced to be 0 constantly so the instantaneous grounding fault can be cleared automatically, and further the technical problem of the existing fault arc extinction technology of poor arc extinction effect can be solved.
Owner:SHANGHAI HOLYSTAR INFORMATION TECH
Method and apparatus for enabling communication and synchronization between an information processing device and a personal digital assistant using impulse radio wireless techniques
InactiveUS20020128039A1Guarantee smooth developmentSmall sizeAssess restrictionConnection managementInformation processingWeb service
A method and apparatus for communications between an information processing device and an external device, such as a personal digital assistance (PDA), via impulse radio wireless communications techniques and a method for controlling the same. The information processing apparatus can periodically accesses a predetermined server machine (e.g., a Web server) to acquire a desired file (e.g., an HTML file). The information processing apparatus attempts to continually perform caching of the most recent downloaded data. As a result, when the PDA, as an external device, is set into impulse radio communication mode and a user simply holds the PDA to a predetermined discoverable region of the information processing apparatus, a connection between them is established, thereby enabling the PDA to receive the most recent downloaded data.
Owner:TIME DOMAIN
One-cavity three-mode filter
The invention relates to the technical field of microwave filters or duplexers, in particular to a one-cavity three-mode filter based on the one-cavity three-mode technology. The one-cavity three-mode filter is characterized by at least comprising a cubic rectangular waveguide resonant cavity, three modes of TE101, TE011 and TE110 are arranged in the cubic rectangular waveguide resonant cavity and have the same resonance frequency, a non-conductive medium material is filled in the chamber of the cubic rectangular waveguide resonant cavity with six conductive surfaces, and the side length is square root of one half of the wavelength when the mid frequency is in the medium material. The one-cavity three-mode filter has the advantages of small size and low manufacturing cost.
Owner:XIDIAN UNIV
Millimeter-wave four-polarized frequency scanning antenna
ActiveCN101533960AImprove polarization isolationRealize scanningPolarised antenna unit combinationsSlot antennasHigh volume manufacturingCommunications system
The invention discloses a millimeter-wave four-polarized frequency scanning antenna, and relates to a multi-polarized frequency scanning antenna capable of being applied in fields such as millimeter-wave wireless communication system, radar detection and the like. An upper-layer metal copper-clad surface (1) and a lower-layer metal copper-clad surface (2) of the antenna are positioned on a front side and a back side of a dielectric substrate (3) respectively; and a metalized through hole (4) pass through the dielectric substrate (3) and is connected with the upper-layer metal copper-clad surface (1) and the lower-layer metal copper-clad surface (2) to form a substrate integrated waveguide 90 DEG directional coupler (5), a substrate integrated waveguide 16-groove 45 DEG slot leaky-wave antenna (6), a first clearance channel (61), a substrate integrated waveguide 16-groove -45 DEG slot leaky-wave antenna (7), and a second clearance channel (71). The whole antenna adopts substrate integrated waveguide for design, can be directly integrated with a radio-frequency circuit, and has the characteristics of low consumption, low cost, easy mass production and the like.
Owner:SOUTHEAST UNIV
Space positioning platform
InactiveCN103738882ASimple structureReasonable designLifting framesRectangular coordinatesReciprocating motion
The invention discloses a space positioning platform which comprises an X-direction guide rail, a Y-direction guide rail driven by an X-direction driving mechanism to be in linear reciprocating motion along the X-direction guide rail, a Z-direction guide rail driven by a Y-direction driving mechanism to be in linear reciprocating motion along the Y-direction guide rail, and a carrying platform driven by a Z-direction driving mechanism to be in up-down reciprocating motion along the Z-direction guide rail. The Y-direction guide rail is mounted on the X-direction guide rail , the Z-direction guide rail is mounted on the Y-direction guide rail, the carrying platform is mounted on the Z-direction guide rail, and the X-direction driving mechanism, the Y-direction driving mechanism and the Z-direction driving mechanism form a servo driving system for adjusting position of the carrying platform in directions X-axis, Y-axis and Z-axis of a space rectangular coordinate system. The space positioning platform is simple in structure, reasonable in design, simple and convenient to use and operate, good in using effect and high in positioning efficiency, and the problem that an existing lifting device is single in moving direction, inaccurate in positioning, poor in reliability and the like can be effectively solved.
Owner:CHANGAN UNIV
Interactive safety helmet for bicyclists
InactiveUS6017049AComfortable to wearLarge power capacityOptical signalCycle standsLoudspeakerMicrophone
An interactive safety helmet for a bicyclist, making it possible for a group of bicyclists wearing like helmets to communicate with each other and thereby coordinate their activities. The helmet is formed by an outer shell shaped to fit onto the head of the bicyclist and an inner cushioning liner having a pair of miniature loud speakers embedded therein at opposing sides adjacent the ears of the bicyclist. Extending from the shell is a gooseneck supporting a microphone at a position adjacent the mouth of the bicyclist. Mounted on the shell is a miniature radio transceiver whose transmitter section is coupled to the microphone and whose receiver section is coupled to the loud speakers. The transceiver is connected by a line extending from the helmet to an external battery power pack. In operation, a bicyclist wearing the helmet can by talking into the microphone and listening to the loud speakers interact with other bicyclists in the group. The helmet is also provided on either side thereof with an LED safety flashing light powered by the same power pack.
Owner:SPECTOR DONALD
Surface Cleaning Apparatus
ActiveUS20140053367A1Improve performanceReduce air velocityCleaning filter meansSuction filtersCycloneSurface cleaning
A surface cleaning apparatus comprises an air flow path extending from a dirty air inlet to a clean air outlet and includes a suction motor. The surface cleaning apparatus may be battery powered and / or may have a power requirement of 200 Watts or less. A cyclone chamber is provided in the air flow path and has an air outlet which is covered by a screen. In one embodiment, there is an absence of a vortex finder. In another embodiment, a vortex finder that extends into the cyclone chamber less than the height of the cyclone inlet and optionally less than the height of the cyclone inlet may be provided.
Owner:OMACHRON INTPROP
Double frequency combiner
ActiveUS20100278197A1Less differential lossLarge power capacityAutomatic scanning with simultaneous frequency displayPulse automatic controlLow-pass filterBand-pass filter
The invention discloses a dual frequency multiplexer by which a first and second coaxial harmonic oscillator type band pass filters are disposed in a box. The box includes a base body, a cover plate and a cover body. The two coaxial harmonic oscillator type hand pass filters are located on the base body and spaced each other by a metal plate; the multiplexer port, first and second ports are positioned on lateral side of the base body. The blocking capacitors are contained in the coaxial chamber of the two coaxial harmonic oscillator type band pass filters. The cover plate is secured on the base body; the first and second direct current circuits are placed on the cover plate; the low pass filters of the first and second direct current circuits are fixed on an edge of a top surface of the coaxial chamber by means of a support member; the cover body and the base body are fastened with each other. The blocking capacitors each are of distributed parameter capacitor. Utilization of distributed blocking capacitors makes the product of the invention small. Moreover, improvement of the structure of the invention brings effect such as less differential loss, large power capacity, as well as high isolation degree between circuits.
Owner:COMBA TELECOM TECH (GUANGZHOU) CO LTD
Ultrasonic vibration atomizer
InactiveCN103056061ASimple structureLarge power capacityLiquid spraying apparatusLiquid mediumEngineering
The invention discloses an ultrasonic vibration atomizer which comprises a liquid delivery pipeline, a bolt, a rear cover plate, a piezoelectric ceramic wafer, an electrode piece, an amplitude changing rod and a mesh vibration plate. The rear cover plate, the piezoelectric ceramic wafer, the electrode piece and the amplitude changing rod are sequentially sleeved on the bolt and connected and clamped through the bolt, the liquid delivery pipeline is connected at the rear end of the bolt, and the mesh vibration plate is arranged at the front end of the amplitude changing rod. An energy converter is of a sandwich type structure, and the ultrasonic vibration atomizer has the advantages of large power capacity, tiny and uniform in fogdrop after atomizing, effective in liquid medium atomizing, easy to control atomizing amount and the like.
Owner:SUZHOU UNIV OF SCI & TECH
Coaxial RF Device Thermally Conductive Polymer Insulator and Method of Manufacture
ActiveUS20070267717A1Improve thermal conductivityImprove cooling effectSemiconductor/solid-state device detailsSolid-state devicesElectrical conductorConductive polymer
An insulator supporting an inner conductor within the outer conductor of a coaxial device formed from a portion of thermally conductive polymer composition with a thermal conductivity of at least 4 W / m-K. The portion is dimensioned with an outer diameter in contact with the outer conductor and a coaxial central bore supporting there through the inner conductor. Cavities may be formed in the portion for dielectric matching and or material conservation purposes. The insulator may be cost effectively fabricated via injection molding.
Owner:COMMSCOPE TECH LLC
High-power microwave hole interior fracturing device for engineering rock mass
ActiveCN108463020ALarge power capacityCompact structureInsulationFluid removalElectrical conductorCoaxial line
Owner:NORTHEASTERN UNIV LIAONING
Single-electrical signal-stimulated rotation ultrasonic motor
InactiveCN101860259ASimple structureEasy to integratePiezoelectric/electrostriction/magnetostriction machinesMiniaturizationLongitudinal vibration
The invention discloses a single-electrical signal-stimulated rotation ultrasonic motor which comprises a mandrel, a group of piezoelectric ceramic sheets, a window-shaped staggered mode converter, a friction disk, a bearing, a spring and a nut, wherein the piezoelectric ceramic sheets, the window-shaped staggered mode converter, the friction disk, the bearing, the spring and the nut are sequentially sleeved on the mandrel, the piezoelectric ceramic sheets are connected with electrode sheets, the mandrel, the piezoelectric ceramic sheets, the electrode sheets and the window-shaped staggered mode converter form the stator part of the ultrasonic motor, the friction disk and the bearing form the rotor part of the ultrasonic motor, and the spring and the nut form a positive-pressure pretightening force adjusting mechanism of the rotor and the stator parts of the ultrasonic motor. In the invention, a single-electrical signal-stimulated working mode is adopted, the elliptical orbit motion of stator end surface particles is realized by utilizing the longitudinal vibration mode of the group of piezoelectric ceramic sheets, a rotor is driven to rotate, and the ultrasonic motor has simple control-driven system, easy manufacture, easy miniaturization and integration, low cost, small control difficulty and broad application prospect.
Owner:SUZHOU UNIV OF SCI & TECH +1
Coaxial RF device thermally conductive polymer insulator and method of manufacture
ActiveUS7705238B2Improve thermal conductivityImprove cooling effectCoaxial cables/analogue cablesPlastic/resin/waxes insulatorsElectrical conductorConductive polymer
An insulator supporting an inner conductor within the outer conductor of a coaxial device formed from a portion of thermally conductive polymer composition with a thermal conductivity of at least 4 W / m-K. The portion is dimensioned with an outer diameter in contact with the outer conductor and a coaxial central bore supporting there through the inner conductor. Cavities may be formed in the portion for dielectric matching and or material conservation purposes. The insulator may be cost effectively fabricated via injection molding.
Owner:COMMSCOPE TECH LLC
Electric control scanning waveguide leaky-wave antenna based on liquid crystal
ActiveCN105006656AEasy to primeSimple control mechanismLeaky-waveguide antennasWave structureSpecial design
The invention provides an electric control scanning waveguide leaky-wave antenna based on liquid crystal, belongs to the technical field of microwave antenna engineering, and aims at solving problems that a conventional electric control scanning leaky-wave antenna based on a varactor and other conventional electrically controlled elements is difficult to work at a microwave high-frequency band, and existing liquid crystal electric control scanning leaky-wave antennas require the special design of a bias circuit. The electric control scanning waveguide leaky-wave antenna comprises a top part dielectric plate layer, a metal layer, an insulation paste layer, a liquid crystal layer and a bottom part waveguide slot. The metal layer is arranged at the lower surface of the top part dielectric plate layer. The metal layer has a leaky-wave structure with etching of periodic transverse seams. Equivalent series inductance of electromagnetic wave is enabled to be increased by the periodic transverse seams when electromagnetic wave is transmitted between the bottom part waveguide slot and the metal layer. The metal layer is provided with N periodic seam units. Seam unit spacing distance p is from lambdag / 2 to lambdag. The seams of the middle part are main radiation units. Seam length l of the main radiation unit is from lambdag / 4 to lambdag / 2. The former four and the latter four seams are auxiliary radiation units.
Owner:北京超材信息科技有限公司
Impact performance simulation test method and device for grounding body with large simulated size and large amplitude value
Owner:CHINA ELECTRIC POWER RES INST
Beam scanning microstrip planar reflection array antenna based on microcrystal material and fabrication method of beam scanning microstrip planar reflection array antenna
InactiveCN107046176AIncrease working frequencyLarge power capacityAntenna arrays manufactureRadar systemsExternal bias
The invention relates to a beam scanning microstrip planar reflection array antenna based on a microcrystal material and a fabrication method of the beam scanning microstrip planar reflection array antenna, which are mainly used for solving the technical problems of low power capacity and low working frequency band in the prior art. The beam scanning microstrip planar reflection array antenna comprises phase shift units, beam scanning devices and a feeding source, wherein the phase shift units are arranged right below a microstrip reflection array and are in contact with the microstrip reflection array, the beam scanning device are correspondingly connected with the phase shift units, the feeding source is connected with the beam scanning device and is arranged right below the microstrip reflection array, the phase shift units are liquid crystal units and are used for connecting an input / output end of the antenna, and the beam scanning devices are used for providing external bias for the phase shift units. By the technical scheme, the problem is solved very well, and the beam scanning microstrip planar reflection array antenna can be used for a communication and radar system.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Table feeder
InactiveUS20110031280A1Good stress reliefLarge power capacityMovable measuring chambersLarge containersDischargerParticulate material
A table feeder 1 has a bottom assembly 3 of a particulate material processing vessel 2, a discharger 4 provided in the bottom assembly 3 to discharge a particulate material P kept in the vessel 2, a bottom plate 5 included in the bottom assembly 3, a rotating shaft 6 provided vertically to a main face 5a of the bottom plate 5 to rotate on the center of the bottom plate 5, rotary vanes 7 to discharge the particulate material P kept in the particulate material processing vessel 2 via the discharger 4 and a drive device 8 configured to drive and rotate the rotary vanes 7. A cone 10 having a smaller diameter than a diameter of the rotary vanes 7 is provided in the space above the rotary vanes 7 coaxially with the rotary vanes7 to extend over a central area of the rotary vane 7.
Owner:TSUKASA
Millimeter-wave broadband ridged probe radial waveguide power divider/combiner
The invention belonging to the field of the millimeter wave technology discloses a millimeter-wave broadband ridged probe radial waveguide power divider / combiner. The radial waveguide power divider / combiner comprises a coaxial input waveguide, a transition structure, a radial waveguide, and an N-path ridged probe coupled output array. According to the invention, with the broadband low-reflection transition structure for the coaxial waveguide to the radial waveguide, a matched circular ring structure, and the power distribution mode of the ridge probe, the working bandwidth of the power divider / combiner is increased; the radial waveguide power divider completes power distribution by one-time operation, so that the path losses of the power distribution is reduced; and because of the circumferential symmetry of the structure and the radial waveguide working mode, the amplitude-phase consistency of all paths of signals after distribution is guaranteed, so that the high power synthesis efficiency of the power combiner is realized.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Microwave heating device adopting phase scanning
The invention relates to a microwave heating device adopting phase scanning. The device comprises a microwave generator, a waveguide power divider, a waveguide phase shifter, a microwave application cavity, no less than two pairs of microwave antennas and a phase scanning control system; the waveguide power divider has N (N is larger than or equal to two) routes of output, at least one route of output is connected with the waveguide phase shifter; the microwave antennas are divided into N groups, at least one group of input is connected with the output of the waveguide phase shifter, and the input of the other groups of antennas are directly connected with the output of the waveguide power divider; the phase difference between an input port of the waveguide phase shifter and an output portof the waveguide phase shifter is continuously adjustable; the phase scanning control system adjusts a phase shift angle of the waveguide phase shifter at a given speed; by scanning the phase difference among different groups of antennas, the movement of microwave strong field and weak field regions in a microwave application cavity is achieved, and the heating uniformity is improved; the microwave heating device adopting the phase scanning has large power capacity, and is suitable for industrial microwave large-scale production application.
Owner:KUSN JIUHUA ELECTRONICS EQUIP FACTORY
Single-inductor-multiple-output regulator with auto-hopping control and the method of use
ActiveUS8624429B2Minimized cross-regulationLarge power capacityElectric signal transmission systemsBatteries circuit arrangementsSwitching frequencyInductor
Owner:THE HONG KONG UNIV OF SCI & TECH
Liquid crystal electrical control zero-crossing scanning leaky wave antenna based on comb-line waveguide
ActiveCN105071019AImprove radiation efficiencyReduce leakageAntenna supports/mountingsRadiating elements structural formsEquivalent series inductanceLine structure
The invention discloses a liquid crystal electrical control zero-crossing scanning leaky wave antenna based on comb-line waveguide, which belongs to the technical field of microwave antenna construction. The problems that a conventional electrical control scanning leaky wave antenna based on a varactor and other traditional electric tuning elements difficultly works in a microwave high frequency band and the existing liquid crystal electrical control fixed-frequency scanning leaky wave antenna is difficult to realize zero-crossing scanning and requires a bias circuit which is specially designed are solved. The antenna provided by the invention comprises a top dielectric plate layer, a metal layer, a liquid crystal layer and a bottom waveguide groove. The metal layer is arranged between the top dielectric plate layer and the bottom waveguide groove. A longitudinal groove structure is arranged on the upper surface of a rectangular plate to form the bottom waveguide groove. The metal layer is in a comb-line structure. N periodic slit units are arranged between two columns of comb teeth on the comb-line structure. N periodic slit units comprise two groups of vertical slit columns and a group of transverse slit column. Through periodic transverse slits, the equivalent series inductance of electromagnetic waves spreading between the bottom waveguide groove and the metal layer is increased. Through periodic vertical slits, the equivalent parallel capacitance is increased.
Owner:北京超材信息科技有限公司
Inverter parallel-connection loop current restraining system based on PR control and dual-carrier modulation
InactiveCN103888007AIncrease profitSuppress low-frequency zero-sequence circulating currentDc-ac conversion without reversalPower inverterResonance
The invention discloses an inverter parallel-connection loop current restraining system based on PR control and dual-carrier modulation. By means of the inverter parallel-connection mode, the power capacity of an inverter system is increased. Meanwhile, a proportion resonance control device is adopted in an inverter, and therefore low-frequency zero-sequence loop currents can be effectively restrained; the dual-carrier modulation method is used, a zero vector is replaced by a non-zero vector so that the high-frequency zero-sequence loop currents can be restrained. The restraining system has the advantages of being high in direct-current voltage utilization rate and small in zero-sequence loop current.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
GaN high electron mobility transistor (HEMT) technology based monolithic integration active quasi circulator
ActiveCN104868866ALarge power capacityReduce system areaPower amplifiersWaveguide type devicesAudio power amplifierEngineering
The invention discloses a GaN high electron mobility transistor (HEMT) technology based monolithic integration active quasi circulator. The monolithic integration active quasi circulator comprises a transmitting branch power amplifier, a lumped power divider and a receiving branch power amplifier, which are sequentially connected and are integrated in the same chip through an AlGaN / GaN HEMT technology. The transmitting branch power amplifier, from a transmitting port, comprises a first input match circuit, a first stabilizing circuit, a first gallium nitride transistor and a first output match circuit, which are sequentially connected. An output end of the first output match circuit is connected with a first power dividing port J1 of the lumped power divider. A synthesis port of the lumped power divider is an antenna port. The structure of the receiving branch power amplifier is the same as the structure of the transmitting branch power amplifier. A second power dividing port J1 of the lumped power divider is used as an input end. An output end of the receiving branch power amplifier is a receiving port of the active quasi circulator. The monolithic integration active quasi circulator effectively reduces circuit area, has large power capacity, and has a broad application prospect.
Owner:NANJING UNIV OF SCI & TECH
Compact type ultra wide band polarizer
The invention relates to the technical field of communication and in particular discloses a compact type ultra wide band polarizer. The compact type ultra wide band polarizer comprises a circular waveguide port, a transition chamfer square waveguide and an ultra wide band phase shifter, wherein the circular waveguide port is connected with the ultra wide band phase shifter by virtue of the transition chamfer square waveguide, the circular waveguide port is arranged at the two ends, one end is an input circular waveguide port, and the other end is an output circular waveguide port; the transition chamfer square waveguide is a square waveguide with four ridges chamfers; and the ultra wide band phase shifter is a square waveguide the side wall of which is provided with a horizontal ridge and a vertical ridge, and the horizontal ridge is symmetrically distributed on the two opposite side walls of the square waveguide along the axial direction of the square waveguide. In the invention, a simple and compact structure is adopted, linear circular polarization on two direction field vectors are smartly realized, technical indexes of amplitude and phase for a circular polarizer to be orthogonal with two field components are met, and the compact type ultra wide band polarizer disclosed by the invention has the advantages of compact structure, small volume, light weight, low cost, easiness in processing, easiness in tuning, high efficiency, high power capacity and the like.
Owner:INST OF ELECTRONICS ENG CHINA ACAD OF ENG PHYSICS
Single-excitation ultrasound oval vibration turning device
ActiveCN104607671ASimple structureReduce complexityAuxillary equipmentMechanical vibrations separationEllipseTransducer
The invention provides a novel single-excitation ultrasound oval vibration turning device. The single-excitation ultrasound oval vibration turning device comprises a shell unit, an ultrasonic vibration transducer arranged in the shell unit, an oval vibration mode converter and a cutter arranged at the front end of the oval vibration mode converter. The shell unit comprises an outer sleeve, a top plate and a bottom plate, wherein a supporting plate is connected with the outer sleeve in a welding mode or through screws and used for being connected with a lathe cutter rest. The ultrasonic vibration transducer is cylindrical overall and comprises an upper covering plate, a piezoelectric ceramic piece, an electrode piece and a lower covering plate, wherein the electrode piece is connected with an ultrasonic power source, the upper covering plate, the piezoelectric ceramic piece, the electrode piece and the lower covering plate are pressed tightly through bolts to form an energy conversion part of the ultrasonic vibration transducer, ultrasonic electric signals output by the ultrasonic power source are converted into longitudinal ultrasonic vibration of the ultrasonic vibration transducer, and the upper surface of the upper covering plate is connected with the oval vibration mode converter.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Dual-mode reconfigurable filter based on half-mode substrate integrated waveguide and CSR structure
ActiveCN107591595AHigh Q valueReduce weightWaveguide type devicesSpiral resonatorCommunications system
The invention belongs to the technical field of microwaves and millimeter waves and provides a dual-mode reconfigurable filter based on a half-mode substrate integrated waveguide and a CSR structure,mainly to solve the problems that an ordinary tunable filter has large insertion loss and bias voltage of a PIN diode can not be directly added to the substrate integrated waveguide. The half-mode substrate integrated waveguide technology is adopted, an upper metal pattern layer comprises a half-mode substrate integrated waveguide copper clad layer, a DC bias circuit, an epsilon-type microstrip line and other structures. Two complementary circular spiral resonators (CSR) are arranged at two sides of the copper clad layer, through applying forward / reverse bias voltage, the PIN diode is conducted or cut off, the upper metal copper and the epsilon-type microstrip line are conducted or cut off, and finally, single dual passband switching is realized. The reconfigurable filter under the features is particularly suitable for a wireless communication system, and has the advantages of small size, low insertion loss, multiple transmission zero points, high out-of-band suppression, convenient DCfeed loading, quick tuning speed, convenient tuning and the like.
Owner:YANCHUANG PHOTOELECTRIC TECH GANZHOU
Multi-purpose illumination set
InactiveUS20070109803A1Large power capacityOptical signalLighting elementsElectricityLight equipment
An illumination set includes a lighting device, a spare power pack, a cable and two mounting devices. The lighting device includes a light source and at least one battery for energizing the light source. The spare power pack includes at least one battery for energizing the light source. The cable electrically connects the spare power pack to the lighting device. Two mounting devices mount the spare power pack and the lighting device to a bicycle.
Owner:CHUANG LOUIS
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