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40results about How to "Change phase" patented technology
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Sequential control signal generation method and device of cold ion quantum information processor
ActiveCN105281886ARealize intuitive descriptionAvoid duplication of workSynchronising arrangementControl signalRadio frequency signal
The invention provides a sequential control signal generation method of a cold ion quantum information processor. Radio frequency signal and digital signal parameters are set through a principal computer command on a principal computer; the principal computer command is converted into a machine command which is transmitted to a sequential control FPGA; the sequential control FPGA executes the machine command and digital signals and radio frequency signals are output through a conversion module and a radio frequency synthesis module. The invention also provides a sequential control signal generation device of a cold ion quantum information processor. The device comprises a principal computer, a sequential control module, a radio frequency synthesis module and a conversion module. According to the invention, sequential control signals for experiments are described intuitively; programmed principal computer commands can be used repeatedly, so that repeated work is prevented and improvement can be made according to experiment results conveniently; the parameters such as the frequency, the phase and the amplitude of radio frequency signals can be changed conveniently; multiple paths of control signals can be controlled accurately to work cooperatively; the extendibility is great.
Owner:WUHAN INST OF PHYSICS & MATHEMATICS CHINESE ACADEMY OF SCI
Mach-Zehnder optical switch structure based on coupling of double resonant cavities
InactiveCN103487889AAchieve outputPhase changes drasticallyCoupling light guidesResonant cavityRefractive index
A Mach-Zehnder optical switch structure based on coupling of double resonant cavities comprises a pair of input waveguides, a front coupler, a rear coupler, a pair of output waveguides and a pair of optical resonant cavities, wherein the input end of the front coupler is connected with the input waveguides and is used for dividing a path of light into two paths of light, and the two paths of light enter an upper interference arm and a lower interference arm respectively; the rear coupler combines the two paths of light into one path of light to be coupled into a certain optical waveguide of the input waveguides; one end of each output waveguide is connected with the output end of the rear coupler; the two ends of the upper interference arm and the two ends of the lower interference arm are connected with the front coupler and the rear coupler respectively; the optical resonant cavities are coupled with the upper interference arm and the lower interference arm respectively. According to the Mach-Zehnder optical switch structure, the advantage of drastic phase changes of wave lengths near resonance points is utilized, the two-arm interference characteristic of the Mach-Zehnder interference structure is combined, the refractive index of one resonant cavity only needs to be changed, and light signals are output from different ports.
Owner:SHANGHAI JIAO TONG UNIV
Dynamic power flow control device and method of controllable transformer
ActiveCN102324742AChange amplitudeChange phaseReactive power adjustment/elimination/compensationReactive power compensationElectronic switchEngineering
The invention provides a dynamic power flow control device of a controllable transformer. The dynamic power flow control device is composed of the controllable transformer, a power unit, a measurement and control module, a bypass switch, an input voltage transformer, an output voltage transformer and an output current transformer. The dynamic power flow control method comprises the following steps of: controlling the ON and OFF of a subconnector at an input side (original edge) of the controllable transformer by using a quickly powered-on / off electronic power switch; injecting a duple-frequency signal in a pulse-width modulation signal of the electronic power switch of the controllable transformer by using a DC (Direct Current) signal; and changing the phase position and the amplitude of output voltage of the controllable transformer through changing the amplitude of the DC signal in the pulse-width modulation signal as well as the amplitude and the initial phase position of the duple-frequency signal so as to realize the adjustment of active power and reactive power. In the invention, as the conduction of the subconnector of the controllable transformer is controlled, the dynamicpower flow of a power network is adjusted and controlled; and the dynamic power flow control device has the characteristics of low cost and high reliability for the control of dynamic power flow.
Owner:STATE GRID CORP OF CHINA +1
AC/AC converter
InactiveCN102364862AImprove conversion efficiencySimple structureConversion without intermediate conversion to dcCapacitanceLow-pass filter
The invention discloses an AC / AC converter. A corresponding principle comprises: acquiring alternating current power Uin (AC) from power grid (L, N, grounding); sending to a high-frequency transformer T-2 after passing through an EMI filter which is formed by differential mode capacitors C1, C2, a common mode choke T-1 and common mode capacitors C3, C4; performing by turns high frequency conduction to primary switches S1, S2of the high-frequency transformer T-2. Then, a power frequency voltage added on primary windings N3, N4 of the high-frequency transformer T-2 is converted into a high frequency voltage so that secondary windings N5, N6 of the high-frequency transformer T-2 can get the corresponding high frequency voltage. Through correspondingly controlling the switches S3, S4 of the secondary windings, any alternating current voltage Uo (AC) which is common-frequency, same-phase or anti-phase with an input voltage can be acquired on an output terminal. Through carrying out filtering by using a low pass filter which is formed by a L1 and a C5, a distortion factor of the Uo (AC) can be reduced.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Magnetic metal doped vanadium nitride nano-composite fiber microwave absorbent and preparation method thereof
PendingCN110894624AImprove absorbing performanceExpand the way to combineOther chemical processesFibre chemical featuresFiberPyrrolidinones
The invention discloses a magnetic metal doped vanadium nitride nano-composite fiber microwave absorbent and a preparation method thereof. Vanadium acetylacetonate and polyvinylpyrrolidone are added into a N,N-dimethylformamide solvent, and dissolved via stirring to acquire a mixed solution; then a magnetic metal precursor is added into the mixed solution, and the mixed solution is stirred under room temperature to acquire electrospinning fluid; the acquired electrospinning fluid is formed into one-dimensional nanofibers via electrospinning; the prepared nanofibers are subjected to pre-oxidation, and then nitrogen treatment is performed to acquire the Fe / (Co,Ni)VN / C nanofiber electromagnetic microwave absorbent. The magnetic metal doped vanadium nitride nano-composite fiber microwave absorbent prepared according to the invention is complete in shape, large in length-diameter ratio, stable in structure, simple in preparation method, excellent in repeatability and good in microwave absorption performance, and effectively improves the microwave absorption performance of vanadium nitride.
Owner:SHAANXI UNIV OF SCI & TECH
Massive MIMO electrical adjusting antenna
PendingCN110534903AIncrease the number of portsLow costRadio transmissionDifferential interacting antenna combinationsPhase shift modulePhase shifted
A Massive MIMO electrical adjusting antenna comprises a physical phase shift portion and a digital phase shift portion. The physical phase shift portion comprises a radiation unit module, a power division network module, a phase shifter module, a connection structure module, a driving device and an RET control portion which are successively connected from top to bottom. The radiation unit module comprises a plurality of groups of radiation units arranged in parallel. The power division network module comprises a plurality of groups of power division networks arranged in parallel. The phase shift module comprises a plurality of phase shifters arranged in parallel, and the connecting structure module comprises a plurality of connecting structures arranged in parallel. The plurality of radiation units in a single group are connected in parallel and are correspondingly connected with a group of power division networks. The single-group power dividing network is connected to one phase shifter, the phase shifter is correspondingly connected with the connecting structure respectively, the connecting structures are connected to the driving device together, the driving device is electrically connected with the RET control portion, and the connecting structures are connected with the driving device and the phase shifters respectively and drive the phase shifters to move. In the invention, the number of ports of the antenna is prevented from being increased, and a beam scanning function can be covered more widely.
Owner:TONGYU COMM INC
Phase shifting device, antenna and base station
ActiveCN108232378AReduce volumeHighly integratedAntenna supports/mountingsWaveguide type devicesElectrical and Electronics engineeringBase station
The invention provides a phase shifting device. The phase shifting device comprises two phase shifters and at least one circuit combiner arranged between the two phase shifters, wherein the circuit combiner comprises an output end and two input ends; each phase shifter comprises at least one output end, one input end of the circuit combiner is connected with the output end of one of the two phaseshifters, and the other input end of the circuit combiner is connected with the output end of the other phase shifter; and each phase shifter comprises at least two U-shaped phase shifting circuits which are sequentially connected, and an output end of each of any two adjacent U-shaped phase shifting circuits is connected with an input end of the other U-shaped phase shifting circuit and the inputend of the circuit combiner, respectively. By utilizing relatively few cables and welding points, the phase shifting device has relatively small volume and relatively high integration level. Correspondingly, the invention further provides an antenna and a base station which adopt the phase shifting device.
Owner:COMBA TELECOM TECH (GUANGZHOU) CO LTD
Phase shifter and electrically tunable antenna
ActiveCN112751148AAvoid interferenceStable structureRadiating elements structural formsAntennas earthing switches associationSignal onDielectric plate
The invention discloses a phase shifter and an electrically tunable antenna, the phase shifter comprises a dielectric component, a phase shifting component and a shielding component, the dielectric component comprises a bottom dielectric plate and a top dielectric plate; the phase shifting component includes two fixed transmission lines arranged on the top face of the bottom layer dielectric plate and arranged side by side in parallel on the two sides of the longitudinal direction of the bottom layer dielectric plate and a phase shifting element arranged on the bottom face of the top layer dielectric plate, and the phase shifting element comprises a transverse strip line and two movable transmission lines which are folded in parallel from the two ends of the transverse strip line in the same direction. The movable transmission lines and the fixed transmission lines are coupled in one-to-one correspondence; the shielding component comprises two coupling lines and a shielding cover, the two coupling lines are arranged side by side and parallel to the two fixed transmission lines correspondingly, and the shielding cover is fixedly connected with the two coupling lines on the two sides of the longitudinal direction to form a shielding cavity for shielding the phase shifting assembly. According to the invention, the shielding cover is welded with the coupling line to form a shielding cavity for accommodating the top dielectric plate, so that the interference of external signals on phase shift is shielded.
Owner:COMBA TELECOM TECH (GUANGZHOU) CO LTD +1
Single-pole multi-throw switch with high harmonic suppression
ActiveCN112688651ASmall insertion lossEasy to useOne-port networksElectronic switchingRadio frequencyInductor
The invention relates to a single-pole multi-throw switch with high harmonic suppression, relates to a radio frequency switch device, and belongs to the technical field of basic electrical elements. The high-harmonic suppression switch comprises an input transmission line with one end being an input end, the other end of the input transmission line is connected to one ends of a plurality of harmonic control circuits at the same time, the other end of each harmonic control circuit is connected to one end of a corresponding switch arm, and the other end of each switch arm is an output end. Each harmonic control circuit is composed of an inductor, a capacitor and a tube core, the phase of harmonic waves is changed by selecting proper inductors, capacitors and tube cores for series-parallel connection, and high harmonic suppression is achieved. On the basis of a single-pole double-throw switch, a plurality of harmonic control circuits and switch arms are added to form the single-pole multi-throw switch.
Owner:NO 55 INST CHINA ELECTRONIC SCI & TECHNOLOGYGROUP CO LTD
Optical fiber photo-thermal stimulated Raman spectrum detection method and system for trace gas
The invention discloses an optical fiber photo-thermal stimulated Raman spectrum detection method and system for trace gas. A to-be-detected gas is loaded into the hollow-core optical fiber in a side surface drilling manner; pump light and the first detection light are modulated, and the light enters the hollow-core optical fiber through a coupling lens; the wavelength of the pump light is adjusted, so that the laser wavelength energy difference between the pump light and the first detection light is equal to the transition energy difference of the to-be-detected gas; the first detection light is used as stimulated Raman trigger laser, and the stimulated Raman trigger laser and periodically modulated pump light jointly excite gas to generate a stimulated Raman process, so that the phase of second detection light is influenced to change; and the second detection light forms multi-beam interference light in an FP cavity, phase signals of the interference light are demodulated through a demodulator, and the gas concentration is obtained. The phase change is detected by using an interferometry, the system has very high sensitivity, trace gas detection can be realized, the optical fiber is used for replacing limitations brought by a free space light path, a system size and the like, the application of the system is further promoted, and the development of a photo-thermal spectrum gas detection sensing technology is promoted.
Owner:CHONGQING UNIV +1
Organic composite phase change energy storage material and preparation method and application thereof
InactiveCN110669476AChange phaseLower crystallization temperatureHeat-exchange elementsUltraviolet lightsHeat storage material
The invention discloses an organic composite phase change energy storage material and a preparation method and application thereof. The material consists of fatty alcohol and an azobenzene compound ina mass ratio of 55-75: 25-45. The azobenzene compound in the organic composite phase change energy storage material disclosed by the invention can change the structure from a trans configuration to acis configuration under the ultraviolet light irradiation condition, changes the steric repulsion force and dipole interaction, can change the phase state of the organic phase change material, enables the crystallization temperature of the organic composite phase change energy storage material to be lower than that of the original organic composite phase change energy storage material, and has alonger recovery half life, thereby obtaining the organic composite phase change energy storage material with adjustable crystallization temperature and energy storage density, adjusting the crystallization temperature, realizing long-term supercooling stability, and being prepared into a medium-term and long-term heat storage material for application.
Owner:GUANGDONG UNIV OF TECH
Output-side-switching-based dynamic power flow control device and control method for controllable transformer
ActiveCN102354972AChange amplitudeChange phaseReactive power adjustment/elimination/compensationReactive power compensationPower gridPulse width modulated
The invention discloses an output-side-switching-based dynamic power flow control device for a controllable transformer. The device consists of the controllable transformer, a power unit, a measurement and control module, a bypass switch, an input voltage transformer, an output voltage transformer and an output current transformer. In a dynamic power flow control method, the switching-on and switching-off of an output side / secondary tapping point of the controllable transformer are controlled by utilizing a fast switching-on / off power electronic switch, a frequency doubling signal is injectedinto a pulse width modulation signal of the power electronic switch of the controllable transformer by adopting a direct current signal, and the amplitude of the direct current signal and the amplitude and initial phase of the frequency doubling signal in the pulse width modulation signal are changed, thereby changing the phase and amplitude of output voltage of the controllable transformer and realize active power adjustment and passive power adjustment. The switching-on of the tapping point of the controllable transformer is controlled, thereby realizing adjustment control over the dynamic power flow of a power grid. The device and the method have the characteristics of low cost and high dynamic power flow control reliability.
Owner:SHANGHAI JIAO TONG UNIV
Optical-fiber-interference water level sensing device and method based on sweep-frequency-laser-device demodulation
ActiveCN107356306ASimple and precise demodulationImprove demodulation accuracyMachines/enginesWater resource assessmentLight beamErbium lasers
The invention relates to an optical-fiber-interference water level sensing device and method based on sweep-frequency-laser-device demodulation. The device comprises a sweep-frequency laser device, laser generated by the laser device is divided into two ways through a coupler and transmitted through an optical fiber, one way laser generates first multiple-beam interference through a fabry-perot etalon, and the other way laser generates second multi-beam interference through a water pressure probe; the first multiple-beam interference and the second multi-beam interference are demodulated, a water pressure value in the water pressure probe is obtained, and according to the relationship of the pressure intensity and the water level, a water-level measuring value can be obtained. The water pressure probe comprises a shell, a water pressure strain gauge, a fabry-perot cavity and a fabry-perot-cavity adjusting mechanism, wherein the water pressure strain gauge is in directly contact with water and connected with the fabry-perot-cavity adjusting mechanism; when the water level is changed, the water pressure strain gauge suffers from changes of the water level to drive the abry-perot-cavity adjusting mechanism to move, the cavity length of the fabry-perot cavity is changed along with moving accordingly, and laser generates the second multi-beam interference in the water pressure probe.
Owner:JILIN UNIV
Variable valve timing time correction device
ActiveCN106121758AChange phaseChange opening and closing timeMachines/enginesElectronic controlVariable valve timingData acquisition
The invention relates to a variable valve timing time correction device. The variable valve timing time correction device comprises a data acquisition module, an outer sun wheel, an inner sun wheel and planetary wheels, wherein the outer sun wheel and the inner sun wheel are coaxially arranged, the planetary wheels are located between the outer sun wheel and the inner sun wheel and engaged with the outer sun wheel and the inner sun wheel at the same time, a connecting hole of a camshaft for valve transmission is coaxially formed in the center of the inner sun wheel, and the planetary wheels are provided with a planetary frame in a matched manner; the planetary frame is provided with a clutch or brake in a matched manner, the outer sun wheel achieves power input through transmission of a time correction chain, the number of the planetary wheels is three, at least one planetary wheel is coaxially and fixedly connected with a motor, the data acquisition module is provided with an engine station data acquisition input end, and the data output end of the data acquisition module is connected into a controller of the motor. According to the different working conditions of an engine, valve timing of a valve is automatically adjusted, the automobile engine can obtain the charge amount corresponding to the engine under the different working conditions, and meanwhile, exhausting can become smoother.
Owner:ZHEJIANG UNIV
Output-side-switching-based dynamic power flow control device and control method for controllable transformer
ActiveCN102354972BChange amplitudeChange phaseReactive power adjustment/elimination/compensationReactive power compensationElectronic switchEngineering
The invention discloses an output-side-switching-based dynamic power flow control device for a controllable transformer. The device consists of the controllable transformer, a power unit, a measurement and control module, a bypass switch, an input voltage transformer, an output voltage transformer and an output current transformer. In a dynamic power flow control method, the switching-on and switching-off of an output side / secondary tapping point of the controllable transformer are controlled by utilizing a fast switching-on / off power electronic switch, a frequency doubling signal is injectedinto a pulse width modulation signal of the power electronic switch of the controllable transformer by adopting a direct current signal, and the amplitude of the direct current signal and the amplitude and initial phase of the frequency doubling signal in the pulse width modulation signal are changed, thereby changing the phase and amplitude of output voltage of the controllable transformer and realize active power adjustment and passive power adjustment. The switching-on of the tapping point of the controllable transformer is controlled, thereby realizing adjustment control over the dynamic power flow of a power grid. The device and the method have the characteristics of low cost and high dynamic power flow control reliability.
Owner:SHANGHAI JIAO TONG UNIV
Mode-insensitive optical waveguide type optical switch and preparation method thereof
PendingCN114153025ASimple preparation processChange phaseOptical waveguide light guideSilicon chipOptical switch
The invention discloses a mode-insensitive optical waveguide type optical switch and a preparation method thereof, and belongs to the technical field of planar optical waveguide optical switches and preparation. The mode-insensitive optical waveguide type optical switch is prepared by taking a silicon wafer as a substrate, taking an organic polymer material as a lower cladding and an upper cladding of a waveguide and taking an organic polymer material with a relatively large thermo-optical coefficient as a core layer of the waveguide. The advantages of various types, high processability and large thermo-optical coefficient of organic polymer materials are fully utilized, the refractive index of the modulation arm is changed by changing the temperature of the modulation arm, then the phase of light in the modulation arm is changed, and the purpose of changing an output port of light is achieved; the thickness of the modulation arm is adjusted through reactive ion etching, so that the effective refractive indexes of different modes are almost the same, the modulation temperatures required by different optical modes are the same, and the purpose that the modes are insensitive is achieved. The planar optical waveguide optical switch is low in cost, high in preparation efficiency and suitable for batch production and practical application.
Owner:JILIN UNIV
Base station, antenna and phase shifting device
ActiveCN113410592AChange lengthChange phaseAntenna supports/mountingsWaveguide type devicesDielectric plateMechanical engineering
The invention provides a base station, an antenna and a phase shifting device. The phase shifting device comprises a fixed dielectric plate, a movable dielectric plate and a limiting part, the pivoting end of the movable dielectric plate is pivotally arranged on the fixed dielectric plate, the fixed dielectric plate is provided with a fixed transmission line, the fixed transmission line extends along the rotational motion path of the free end of the movable dielectric plate, and signal output ports are respectively formed at the two ends of the fixed transmission line; at least one surface of the movable dielectric plate is provided with a movable transmission line, and the movable transmission line is electrically conducted with the signal input port on the fixed dielectric plate; and the limiting part is arranged above the fixed dielectric plate in parallel along the extension path of the fixed transmission line, so that the limiting part and the fixed transmission line jointly define an arc-shaped gap for the free end of the movable dielectric plate to rotate to realize phase shift. The phase shifting device is compact in overall structure, easy to install, small in occupied space, good in phase shifting performance and particularly suitable for a 5G Mass i veM I MO electrically tunable antenna.
Owner:COMBA TELECOM TECH (GUANGZHOU) CO LTD +1
Field control wavelength interval adjustable multi-wavelength ultrafast fiber laser
ActiveCN106953227AChange phaseChanging the wavelength intervalActive medium shape and constructionMultiplexerControl signal
The invention provides a field control wavelength interval adjustable multi-wavelength ultrafast fiber laser. The output end of the laser is connected to the first input end of a first wavelength division multiplexer, the output end of the first wavelength division multiplexer is connected to the input end of a second coupler, the first output end of the second coupler is connected to the first input end of a third coupler through a first optical fiber, the second output end of the second coupler is connected to the second input end of the third coupler through an evanescent field fiber wrapped with a graphene film, the output end of the third coupler is connected to the input end of the first coupler, the first output end of the first coupler is connected to the second input end of the first wavelength division multiplexer, a field control signal is applied to the graphene film and the optical signal and / or the field control signal input to the evanescent field fiber can be adjusted, and the interval of the wavelength output from the second output end of the first coupler can be adjusted. According to the invention, the wavelength interval adjustment rate and accuracy can be improved.
Owner:CHONGQING UNIV
Dynamic power flow control device based on wide range controllable transformer with bidirectional power transistor
ActiveCN106300360BChange phaseChange amplitudeAc networks with different sources same frequencyTransformerElectronic switch
Owner:上海驹电电气科技有限公司
Method and device for generating timing control signal of cold ion quantum information processor
ActiveCN105281886BRealize intuitive descriptionAvoid duplication of workSynchronising arrangementControl signalMachine instruction
The invention discloses a timing control signal generation method of a cold ion quantum information processor. On the upper computer, radio frequency signals and digital signal parameters are set through the upper computer instructions; the upper computer instructions are converted into machine instructions and transmitted to the timing control FPGA; the timing control FPGA Execute machine instructions and output digital signals and radio frequency signals through the conversion module and radio frequency synthesis module. The invention also discloses a timing control signal generating device for a cold ion quantum information processor, including a host computer, a timing control module, a radio frequency synthesis module, and a conversion module. The invention realizes an intuitive description of the timing control signals required for experiments; The compiled host computer instructions can be used repeatedly, avoiding duplication of work, and are convenient for continuous improvement according to experimental results; parameters such as frequency, phase, and amplitude of radio frequency signals can be easily changed; multiple control signals can be precisely controlled to work together; strong scalability .
Owner:WUHAN INST OF PHYSICS & MATHEMATICS CHINESE ACADEMY OF SCI
High ultraviolet reflection biological ceramic material
The invention discloses a high ultraviolet reflection biological ceramic material, which comprises the following component: Ca10-xZnx(PO4)6(OH)2(x:0.5-2). According to the invention, a calcium salt and a phosphate are selected as reactants, a zinc salt is used as a doping agent, and after a doping reaction, post-treatment is performed to obtain the nanometer zinc-doped calcium phosphorus biological ceramic; the microstructure is in a nanoparticle shape and is an amorphous or weak crystalline structure, and the average particle size of the product is 30-200 nm; and the material has ultrahigh ultraviolet reflectivity, and especially the optimal component Ca9Zn(PO4)6(OH)2 has the average UVA reflectivity of close to 100%, the average UVB reflectivity of close to 100% and the average UVC reflectivity of about 90%.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Antenna components and terminal equipment
ActiveCN108023607BChange phaseImprove the problem of radiation spuriousTransmissionHarmonicComputer terminal
The embodiment of the invention relates to the technical field of terminals, and discloses an antenna assembly, and terminal equipment. The terminal equipment comprises a radio frequency (RF) transceiver, an adjustment unit, and an antenna, wherein the RF transceiver is connected with the antenna through the adjustment unit, and is used for generating RF signals; the adjustment unit is used for changing the phase of higher harmonics carried by the RF signals; and the antenna is used for outputting the RF signals. The terminal equipment has the advantages that the phase of the higher harmonic derived from the RF signals can be changed, so that the intensity of the higher harmonics is relatively low when the intensity of the RF signals reaches the peak, and the problem of stray radiation canbe further reduced.
Owner:GUANGDONG OPPO MOBILE TELECOMM CORP LTD
Phase Shifter and ESC Antenna
ActiveCN112751148BAvoid interferenceStable structureRadiating elements structural formsAntennas earthing switches associationDielectric plateMechanical engineering
The invention discloses a phase shifter and an electric adjustable antenna. The phase shifter includes a dielectric component, a phase shifting component and a shielding component. The dielectric component includes a bottom dielectric plate and a top dielectric plate; the phase shift component It includes two fixed transmission lines arranged on the top surface of the bottom dielectric plate and arranged side by side in parallel on both sides in the longitudinal direction, and a phase shifting element arranged on the bottom surface of the top dielectric plate. The phase shifting element includes a transverse strip line and Two movable transmission lines folded in parallel at both ends of the stripline, and the movable transmission lines are coupled and connected to the fixed transmission lines one by one; the shielding assembly includes two coupling lines arranged side by side and parallel to the two fixed transmission lines, and a shielding case , the shielding case is fixedly connected to two coupled lines on both sides in the longitudinal direction, forming a shielding chamber that shields the phase shifting assembly. The shielding case of the present invention is welded with the coupling line to form a shielding cavity for accommodating the top layer dielectric board, and shields the interference of external signals to the phase shifting.
Owner:COMBA TELECOM TECH (GUANGZHOU) CO LTD +1
Dynamic power flow control device and method of controllable transformer
ActiveCN102324742BChange amplitudeChange phaseReactive power adjustment/elimination/compensationReactive power compensationPower flowElectronic switch
The invention provides a dynamic power flow control device of a controllable transformer. The dynamic power flow control device is composed of the controllable transformer, a power unit, a measurement and control module, a bypass switch, an input voltage transformer, an output voltage transformer and an output current transformer. The dynamic power flow control method comprises the following steps of: controlling the ON and OFF of a subconnector at an input side (original edge) of the controllable transformer by using a quickly powered-on / off electronic power switch; injecting a duple-frequency signal in a pulse-width modulation signal of the electronic power switch of the controllable transformer by using a DC (Direct Current) signal; and changing the phase position and the amplitude of output voltage of the controllable transformer through changing the amplitude of the DC signal in the pulse-width modulation signal as well as the amplitude and the initial phase position of the duple-frequency signal so as to realize the adjustment of active power and reactive power. In the invention, as the conduction of the subconnector of the controllable transformer is controlled, the dynamic power flow of a power network is adjusted and controlled; and the dynamic power flow control device has the characteristics of low cost and high reliability for the control of dynamic power flow.
Owner:STATE GRID CORP OF CHINA +1
Base station, antenna and phase shifting device
ActiveCN113410592BChange lengthChange phaseAntenna supports/mountingsWaveguide type devicesBase station antennasTransmission line
The invention provides a base station, an antenna, and a phase shifting device, wherein the phase shifting device includes a fixed dielectric plate, a movable dielectric plate, and a limiting member; the pivoting end of the movable dielectric plate can be pivotally mounted on the fixed dielectric plate, A fixed transmission line is arranged on the fixed medium plate, and the fixed transmission line is extended along the rotation path of the free end of the movable medium plate, and the two ends of the fixed transmission line respectively form signal output ports; at least one surface of the movable medium plate is provided with a movable transmission line, the movable The transmission line is electrically connected to the signal input port on the fixed medium plate; the limiter is arranged parallel to the fixed medium plate along the extension path of the fixed transmission line, so as to jointly define with the fixed transmission line for the free end of the movable medium plate to perform rotational movement Arc-shaped slits for phase shifting. The phase shifting device of the present invention has a compact overall structure, is easy to install, occupies a small space, and has good phase shifting performance, and is especially suitable for 5G Mass i ve MI MO electric tuning antennas.
Owner:COMBA TELECOM TECH (GUANGZHOU) CO LTD +1
Power amplifying circuit
ActiveCN105610405AChange outputChange phasePush-pull amplifiersPhase-splittersVIT signalsCapacitance
The invention discloses a power amplifying circuit; the circuit comprises a signal processing circuit, a signal isolating circuit, a signal phase position adjusting circuit, the power amplifying circuit and an inductance-capacitance LC rectifying circuit, wherein the signal processing circuit, the signal isolating circuit, the signal phase position adjusting circuit, the power amplifying circuit and the inductance-capacitance LC rectifying circuit are successively connected. By adopting the circuit disclosed by the invention, through adjusting resistance of resistors of the signal processing circuit, the output of an isolation transformer of the signal isolating circuit can be changed; by adjusting the resistance of the resistors of the signal phase position adjusting circuit, the phase position of an output signal is changed; and thus, the load capacity is improved, and the requirement of long-distance transmission of voltage information is met.
Owner:BEIJING CED RAILWAY ELECTRIC TECH
Dynamic tide flow control device based on wide-range controllable transformer comprising bidirectional power tubes
ActiveCN106300360AChange phaseChange amplitudeAc networks with different sources same frequencyElectronic switchEngineering
The invention discloses a dynamic tide flow control device based on a wide-range controllable transformer comprising bidirectional power tubes, and the device consists of a controllable transformer, a power unit, a measurement and control module, a cross phase conversion module, a filter capacitor, an input / output voltage transformer, and an output current transformer. The control method of a dynamic tide flow comprises the steps: controlling the on / off of a tapping point at an input side (a primary side) of the wide-range controllable transformer through employing a power electronic switch which can achieve quick switching-on and switching-off; connecting another two windings at a tapping point of each phase of the wide-range controllable transformer in a series manner; adding four groups of bidirectional power tubes too change the switching-on direction of the cross phase conversion module, thereby changing the phase and amplitude of the output voltage of the controllable transformer in the largest range, and achieving the adjustment of active power and reactive power. The method carries out the control of the switching-on of the tapping point of the wide-range controllable transformer, thereby achieving the regulation and control of the dynamic tide flow of a power grid. The device is low in cost, and is high in control reliability of the dynamic tide flow.
Owner:上海驹电电气科技有限公司
Dynamic trend control method based on wide-scope controllable transformer comprising bidirectional power tubes
ActiveCN106300361AChange phaseChange amplitudeAc network voltage adjustmentAc networks with different sources same frequencyElectronic switchPower grid
The invention discloses a dynamic trend control method based on a wide-scope controllable transformer comprising bidirectional power tubes. By use of a rapidly conducted and broken electric electronic switch, conduction and breaking of a tap joint at the output side (secondary side) of the wide-scope controllable transformer are controlled, another two phases of windings are connected in series with the side of each phase of the tap joint of the wide-scope controllable transformer, at the same time, the four bidirectional power tubes are additionally arranged for changing the conduction directions of intersected-phase windings, the phase and the amplitude of output voltages of the controllable transformer can be changed in a maximum scope, adjustment of active power and reactive power is realized, since conduction of the tap joint of the wide-scope controllable transformer is controlled, the dynamic trend of a power network can be adjusted and controlled, and the method has the advantages of low cost and high control reliability of the dynamic trend.
Owner:上海驹电电气科技有限公司
A power amplifier circuit
ActiveCN105610405BChange outputChange phasePush-pull amplifiersPhase-splittersCapacitanceSignal processing circuits
Owner:BEIJING CED RAILWAY ELECTRIC TECH
Antenna, base station and phase shifting device
InactiveCN113422206AChange lengthChange phaseParticular array feeding systemsAntenna supports/mountingsMimo antennaControl theory
The invention provides an antenna, a base station and a phase shifting device. The phase shifting device comprises a fixed medium seat and a movable medium seat, the pivoting end of the movable medium seat is pivotally arranged on the fixed medium seat, and the fixed medium seat forms an arc-shaped groove half surrounding the free end on the rotation motion path of the free end of the movable medium seat; a fixed transmission line is arranged on at least one surface of the arc-shaped groove of the fixed medium seat, and signal output ports are respectively formed at two ends of the fixed transmission line; at least one surface of the movable medium seat is provided with a movable transmission line, and the movable transmission line is electrically conducted with the signal input port on the fixed medium seat; and the fixed transmission line is electrically coupled with the movable transmission line. According to the phase shifter, the problems that when a traditional phase shifter is applied to a Massive MIMO antenna, installation is complex, and parts are numerous are solved, and the assembly and production difficulty of the whole antenna is lowered.
Owner:SOUTH CHINA UNIV OF TECH +2
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