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34results about How to "Solve mutual coupling" patented technology
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A dual-polarization radiating element and an array antenna provided with the dual-polarization radiating element
PendingCN109103592ASolve mutual couplingImprove polarization isolationRadiating elements structural formsIndividually energised antenna arraysPhysicsEffective length
The invention discloses a dual-polarization radiating unit and an array antenna provided with the dual-polarization radiating unit, the main technical problem to be solved is the problem of mutual coupling between arrays in the prior art. The dual-polarization radiating element includes a radiation device, which comprises array arms arranged symmetrically on a first PCB substrate, and the array arms are connected with a decoupling circuit by a direct feed mode or a coupling mode. The technical scheme that the effective length of the decoupling circuit is 0.02 to 0.1 wavelength solves the problem well and can be used for an array antenna.
Owner:JIANGSU HENGXIN TECH CO LTD +1
Interference coherent robust beam forming method of unknown mutual coupling information under mutual coupling condition
ActiveCN106788655ASolve mutual couplingSolving signal coherence problemsSpatial transmit diversitySignal-to-noise ratio (imaging)Coupling
The invention discloses an interference coherent robust beam forming method of unknown mutual coupling information under a mutual coupling condition, and belongs to the beam forming technology in the field of adaptive array signal processing. According to the interference coherent robust beam forming method disclosed by the invention, based on the particularity of an array mutual coupling structure, when the specific array mutual coupling information is unknown, an interference plus noise covariance matrix and an expected signal covariance matrix are separately constructed, and a final weight vector is figured out by using the maximum signal-to-noise criterion. According to the interference coherent robust beam forming method disclosed by the invention, the mutual coupling information does not need to be known in advance, an expected signal guide vector does not need to be estimated, and no spatial smoothing decoherence processing needs to be carried out. When the expected signal power is strong and weak, very good performance is kept, and fast convergence can be realized.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Ultra-wide-band microstrip patch antenna and multi-frequency antenna array
PendingCN107086363ASolve the problem of narrow standing wave bandwidthNo dispersion problemAntenna arraysRadiating elements structural formsMicrostrip patch antennaUltra-wideband
The invention relates to an ultra-wide-band microstrip patch antenna and a multi-frequency antenna array. The microstrip patch antenna comprises a metal reflective plate and a radiation patch apparatus above the metal reflective plate; a metal patch and two gaps with opening slots in a first straight line direction are arranged on a microstrip patch layer; the opening slots of the gaps in the first straight line direction are opposite in directions; a feed network layer comprises a first feed input port, a first power division node, a first feeder line, a second feeder line and a third feeder line; one end of the first feeder line is connected with the first feed input port while the other end is connected with the input end of the first power division node; and the fixed ends of the second feeder line and the third feeder line are connected with the output end of the first power division node separately while the free ends extend towards the same side of the two gaps in the first straight line direction separately to cross over the two gaps in the first straight line direction respectively. By virtue of the technical scheme provided by the invention, the problems of antenna feed chromatic dispersion, poor directional diagram cross polarization and cross coupling of different frequencies in a multi-frequency antenna can be solved.
Owner:ANPULUO SUZHOU COMM TECH CO LTD
Shipborne maritime wireless communication monitoring system
InactiveCN101363888AEliminate couplingEliminate phase ambiguityRadio wave direction/deviation determination systemsElectrical testingIntermediate frequencyDsp technology
The invention provides a shipborne overwater wireless communication monitoring system, which comprises a shipborne correlation interferometer direction-finding antenna array, an electrical rotation unit, an RF amplifier module, a card direction finding receiver, a direction-finding control processing module, an embedded computer system and a power supply module. The system has the advantages that an integrated design, the intermediate frequency signal technique and the modularized combination are adopted; the built-in embedded computer system is adopted, so that the structure is compact and portable; the portable passive correlation interferometer direction-finding antenna is adopted to solve the mutual coupling between the antenna array cells to eliminate the coupling and the phase ambiguity between element antennae; the multifunctional amplifier is adopted and automatically switched to enlarge the dynamic application range of the received signal; the card double-channel monitoring direction-finding receiver is equipped, so as to carry out the monitoring and the direction-finding by a sharing time, and switched into the radio monitoring without the need of the direction-finding; and the compensation algorithm software is corrected and combined with an electronic nautical chart and a ship recognition system to meet the requirements for the overwater / offshore monitoring.
Owner:俞惟铨
Low-frequency radiation unit and antenna
PendingCN113285226AReduce distractionsGood for multi-frequencyAntenna supports/mountingsRadiating elements structural formsInterference (communication)Frequency filtering
The invention relates to the technical field of communication, and discloses a low-frequency radiation unit and an antenna. The low-frequency radiation unit comprises a bottom plate, a supporting plate with one end disposed on the bottom plate, and a radiation plate disposed at the other end of the supporting plate. The radiation plate comprises two oscillator arms which are crossed up and down and are perpendicular to each other, each oscillator arm comprises a first radiation arm and a second radiation arm, the first radiation arm is provided with a plurality of spiral groove structures, and the second radiation arm and the first radiation arm are in rotational symmetry. According to the low-frequency radiation unit and the antenna provided by the invention, the spiral groove structures are additionally arranged on the oscillator arms to form the band-stop filter circuit so that the low-frequency radiation unit has a high-frequency filtering function, the problem of mutual coupling between the high-frequency radiation unit and the low-frequency radiation unit in an antenna array is effectively solved, and the interference of the low-frequency radiation unit on the high-frequency radiation unit is reduced; and the multi-frequency and integrated design of the antenna is facilitated.
Owner:GCI SCI & TECH
Single-channel array transmitting antenna based on frequency pre-coding
The invention discloses a single-channel array transmitting antenna based on frequency pre-coding. The antenna mainly solves the problems that a conventional array transmitting antenna structure is complicated in structure, large in size and high in price and amplitude phases are different due to multiple channels. The antenna comprises a waveform generator (1), a frequency modulator (2), a digital-to-analog converter (3), an upper converter (4), a low-noise amplifier (5), a frequency tracker (6) and an antenna oscillator (7). Multipath signals generated by the waveform generator are modulated and aggregated to form a single-channel signal through the frequency modulator, the signal sequentially undergoes formal transformation achieved through the digital-to-analog convert, frequency mixing achieving through the up-converter and amplification achieved through the low-noise amplifier and then an analog radio-frequency signal is obtained. The analog radio-frequency signal outputs a multichannel signal through orthogonal demodulation and filtering of the frequency tracker, and the multichannel signal is transmitted after formal transformation is carried out in an antenna oscillator signal mode. The antenna is simple in structure, small in size, low in cost, good in antenna amplitude phase uniformity and capable of reaching the same performance index as a conventional array transmitting antenna.
Owner:XIDIAN UNIV
Transmission type programmable metasurface for millimeter wave beam scanning
ActiveCN113851853AIncrease the transmission phase change rangeImprove transmittanceWaveguide hornsEngineeringBeam scanning
The invention discloses a transmission type programmable metasurface for millimeter wave beam scanning. The transmission-type programmable metasurface comprises a plurality of basic units, each basic unit comprises a first metal layer, a first dielectric layer, a second metal layer, a second dielectric layer and a third metal layer which are sequentially arranged from top to bottom; each of the first metal layer, the second metal layer and the third metal layer comprises a square copper ring and a square diode patch located in the internal space of the square copper ring; the square diode patch is formed by connecting a plurality of diodes; and each basic unit is connected with the programmable device. The metasurface is simple in structure and can dynamically achieve + / -80-degree large-angle electromagnetic wave beam scanning in real time.
Owner:BEIJING INSTITUTE OF TECHNOLOGYGY
Multi-channel radio monitoring and correlation interference direction-finding fixed station system
InactiveCN1878378ASolve mutual couplingEliminate couplingAntenna arraysRadio/inductive link selection arrangementsPhase detectorAudio power amplifier
The invention relates to a multi signal channel wireless detection and relative interference direction detecting fixed station system. Wherein, it comprises a vertical polarized basic interferometer direction detecting antenna array, high-low electric screw switches, power distributor, the first antenna selector, three-function RF amplifier, dual-signal channel direction detecting receiver, digit middle-frequency phase detector, detecting direction detection processing unit, industrial control computer, low vertical polarizing detecting antenna, high vertical polarizing detecting antenna, the second antenna selector, detecting receiver, accumulator, UPS, environment detecting and remote-control power supply, concentrator, and network. The invention has the advantages that: one couple antenna units sample at the same time, to confirm synchronization, quick speed, and accuracy; and the amplifier has three functions as amplifying, directly through, and decreasing, which can be switched automatically, to expand the dynamic application range of receive signal, to avoid jam when receiving strong signal; and the detection and direction detection can be processed at the same time, with high direction detecting speed. The inventive system has high accuracy, sensitivity, speed, stability and reliability.
Owner:俞文蕴
Antenna decoupling structure and method based on metamaterial and soft surface
PendingCN114709615AHas negative medium parameter characteristicsSolve mutual couplingAntenna couplingsEngineeringMechanical engineering
Owner:CHINA SHIP DEV & DESIGN CENT
Partial polarization signal multi-parameter estimation method based on non-co-located non-uniform polarization array
PendingCN114280530ASave resourcesMeet estimated requirementsRadio wave direction/deviation determination systemsRadio frequencyMatrix estimation
The invention discloses a partially polarized signal multi-parameter estimation method based on a non-co-located non-uniform polarized array. The method comprises the following steps of: arranging a non-co-located non-uniform polarization array; constructing a partially polarized signal receiving model and sampling; solving an array sample covariance matrix and error statistical distribution of the array sample covariance matrix; constructing an optimization problem used for reconstructing a co-located uniform polarization array theoretical covariance matrix and solving the optimization problem; estimating a signal incoming wave direction based on a reconstructed co-located uniform polarization array theory covariance matrix; and solving a signal coherence matrix and estimating a signal polarization parameter. According to the method, the array adopts a non-co-location mode, and the phase centers of the polarization units are not overlapped, so that on one hand, the problem of mutual coupling between co-location array polarization units is avoided; and on the other hand, each array element only has one radio frequency channel, so that resources are saved. Then, the array adopts a non-uniform mode, so that the limitation of a uniform array on the aperture of the array is eliminated, and the estimation of the direction of arrival is ensured not to be fuzzy;
Owner:HANGZHOU DIANZI UNIV
Dual-polarized multi-channel digital radio monitoring and correlation interferometer direction-finding mobile station
InactiveCN1885738AStrong anti-interference abilityExpand the range of dynamic applicationsSpatial transmit diversityTransmission monitoringBroadbandFast speed
The related dual-polarized multi-channel digital radio monitor and interferometer direction- finding mobile station system comprises: a direction-finding antenna for vertical / horizontal polarized interferometer, a vertical / horizontal polarized monitor antenna, two electric switch units, a RF amplifiers, three selectors, two three-functional RF amplifiers, a three-channel receiver, a PC, a processor, a self-correction signal generator, a router, a position indicator, a GPS, an electron compass, a inversion power, a printer, and the network. This invention has well sensitivity and fast speed, and fit to wide application, such as FFT digital monitor.
Owner:俞文蕴
Nine-channel space spectrum super-resolution estimation monitoring and direction-finding mobile station system
InactiveCN102109593AGood anti-multipath effectHigh sensitivityRadio wave finder detailsRadio wave direction/deviation determination systemsStatistical analysisStructure of Management Information
The invention relates to a nine-channel space spectrum super-resolution estimation monitoring and direction-finding mobile station system, which comprises a small double-cone omnidirectional monitoring antenna, a nine-unit direction-finding antenna, an amplifier, a monopole monitoring antenna, a nine-channel signal switching module, a filter combiner, am amplifier module, a nine-channel receiver, a monitoring and direction-finding controller, a DSP (Digital Signal Processor) processing module, an imbedded industrial computer, a GPS (Global Positioning System) antenna, a GPS module, a 3G (3rd Generation) antenna, a 3G router, a power supply module, a remote control unit, an exchanger, and the like. The system has the following advantages: the system achieves remote and automatic monitoring and direction-finding of radio signals; an imbedded computer system is integrally arranged so that the structure is compact and light; a direction-dinging assembly solves the coupling problem between the antenna arrays and prevents coupling and phase between unit antennas from being blurred; the structure is compact and light, and the spanning maintenance is convenient; the grid connection is flexible, and can support different wired / wireless network data transmissions; moreover, collection, compression coding, automatic task monitoring, statistic analysis and abnormal state alarm of wireless signals are realized.
Owner:NANJING DEVING ELECTRONICS SYST
Dual-polarized single channel full-digital radio monitoring direction-finding mobile station system
InactiveCN1885739ASolve mutual couplingExpand the range of dynamic applicationsSpatial transmit diversityPhase conversionAudio power amplifier
The related dual-polarized single-channel full-digital radio monitor and interferometer direction- finding mobile station system comprises: a direction-finding antenna for vertical / horizontal polarized interferometer, a vertical / horizontal polarized monitor antenna, a first / second electric switch units, two selectors, two three-functional RF amplifiers, a RF pre-processor, a single-channel receiver, a PC, a processor, n RF amplifiers, a router, a position indicator, a GPS, an electron compass, a inversion power, a printer, and the network. This invention overcomes antenna array couple well, and has well sensitivity and fast speed, and fit to wide application.
Owner:俞文蕴
Satellite-navigation anti-interference microstrip array antenna
InactiveCN105186119AMiniaturizationSolve mutual couplingAntenna arraysRadiating elements structural formsMicrostrip array antennaPower flow
A satellite-navigation anti-interference microstrip array antenna provided in the invention adopts triangular Y-shaped slot microstrip array elements. By using the antenna, miniaturization of the antenna array can be realized, cross coupling among array elements is effectively overcome and an anti-interference capability is increased. The antenna comprises N microstrip antenna array elements, a medium substrate and a metal reflection base plate. The microstrip antenna array elements are arranged on an upper surface of the medium substrate according to a certain interval. The metal reflection base plate is arranged on a lower surface of the medium substrate. Each microstrip antenna array element comprises a triangle metal radiant panel. The triangle metal radiant panel is provided with a Y-shaped slot. The Y-shaped slot comprises three bar-type slotting. Initiating terminals of the three bar-type slotting are intersected and converged and tail terminals are pointed to three edges of a triangle respectively. The triangular Y-shaped slot microstrip array elements are used for controlling flowing of a surface current and radiating a circular polarized wave. An edge of each bar-type slotting of the Y-shaped slot is provided with a coaxial feed point used for feeding in an electromagnetic wave signal.
Owner:OLINKSTAR CORP
Decoupling device
InactiveCN107528123ASolve mutual couplingImprove antenna performanceAntennas earthing switches associationAntenna couplingsIntermediate pointFrequency band
The present invention provides a decoupling device. The decoupling device is disposed between two antennas and comprises a coupling unit and a tunable unit; the coupling unit comprises a horizontal branch and a vertical branch; the intermediate point of the horizontal branch is connected with one end of the vertical branch; the other end of the vertical branch is grounded; and the tunable unit is disposed on the coupling unit and is use for changing the electrical length of the horizontal branch of the coupling unit. With the decoupling device provided by the present invention adopted, the problem of mutual coupling between the multi-band antennas can be solved, a plurality of frequency bands can be decoupled, and the performance of the antennas can be improved.
Owner:ZTE CORP
Vertical polarized single channel radio monitoring and correlation interference direction-finding fixed station system
InactiveCN100514881CSolve mutual couplingEliminate couplingSpatial transmit diversityTransmission monitoringPhase conversionAudio power amplifier
The related vertical-polarized single-channel digital radio monitor and interferometer direction- finding fixed station system comprises: a direction-finding antenna for big fundamental interferometer, two electric switch units, an antenna selector, a RF pre-processor, a three- functional RF amplifiers, a single-channel receiver, a monitor controller, a industrial control computer, a high / low vertical polarized monitor antenna, a hub, a monitor and remote control unit for environment, and a UPS. This invention overcomes coupling among antennas, fit to process RF signal, enlarges dynamic application range for received signal, and has high feature-price rate.
Owner:俞文蕴
Interference Coherent Robust Beamforming Method with Unknown Mutual Coupling Information Under Mutual Coupling Conditions
ActiveCN106788655BSolve mutual couplingSolving signal coherence problemsSpatial transmit diversityAlgorithmSignal processing
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Nuclear quadrupole resonance-based antenna part of explosive and drug detection system
PendingCN107255790AUniform magnetic fieldSolve mutual couplingAnalysis using nuclear magnetic resonanceMeasurements using NMRTransmitter coilHomogeneous magnetic field
The present invention relates to a nuclear quadrupole resonance-based antenna part of an explosive and drug detection system. The antenna part comprises an emission antenna and a reception antenna which surround a channel of the detection system, the emission antenna is mainly composed of two emission coils which are coaxial and parallel, have the equal shapes and form a HeImholtz coil, the magnetic field intensity in the HeImholtz coil is uniform, and the coaxial distance of the two emission coils forming the HeImholtz coil is decided by the sizes of the emission coils. The emission antenna also comprises at least one conductive coil which is coaxial and parallel and has the equal shape with the two emission coils separately, so that every two adjacent emission coils or conductive coils form the same HeImholtz coils separately to prolong the length of the uniform magnetic field in the emission antenna. The reception antenna comprises at least one reception coil located between the emission antennas. The effects of the present invention are that the magnetic field intensity in the detection channel is uniform while the length of the detection channel is prolonged, and a nuclear quadrupole technology can detect the explosives and drugs normally.
Owner:ANHUI QILOOTECH PHOTOELECTRIC TECH
Radiation unit, antenna and base station
ActiveCN113889747AImprove direction map indicatorsImprove Radiation PerformanceSimultaneous aerial operationsAntenna supports/mountingsEngineeringRadiation rays
The invention provides a radiation unit, an antenna and a base station. The radiation unit comprises two pairs of radiation arms which are arranged in a polarization orthogonality mode; the two pairs of radiation arms are of a central symmetry structure relative to the same central point; and each radiation arm comprises a feed part and a radiation open loop connected with the feed part, wherein the radiation open loop comprises a radiation line, wherein the radiation line is connected in series with at least one filtering unit, and the filtering unit is formed by repeatedly bending a metal wire to form at least one pair of coupling sheets for realizing parallel coupling in different planes. According to the radiation unit, the filtering units are arranged on the radiation arms, and the filtering units are used for counteracting high-frequency current caused by high-frequency signal resonance, so that the problem that the radiation performance is reduced due to mutual coupling when the radiation unit and a high-frequency radiation unit are arranged in a co-array mode is solved.
Owner:SOUTH CHINA UNIV OF TECH +1
Multi-channel radio monitoring and correlation interference direction-finding mobile station system
InactiveCN100387086CSolve mutual couplingExpand the range of dynamic applicationsAntenna arraysRadio/inductive link selection arrangementsPhase detectorIntermediate frequency
The invention relates to a multi signal channel wireless detection and relative interference direction detecting mobile station system. Wherein, it comprises a vertical polarized active / passive interferometer direction detecting antenna array, high-low electric screw switches, power distributor, the first antenna selector, three-function RF amplifier, dual-signal channel direction detecting receiver, digit middle-frequency phase detector, detecting direction detection processing unit, industrial control computer, low vertical polarizing detecting antenna, high vertical polarizing detecting antenna, the second antenna selector, detecting receiver, accumulator, UPS, inverter, head direction instructor, GPS, electric compass, printer, and concentrator. The invention has the advantages that: one couple antenna units sample at the same time, to confirm synchronization, quick speed, and accuracy; it uses active / passive interferometer direction detecting antenna array, to solve the couple problem between array units; and the detection and direction detection can be processed at the same time. The inventive system has high accuracy, sensitivity, speed, stability and reliability.
Owner:俞文蕴
Single channel array transmitting antenna based on frequency precoding
The invention discloses a single-channel array transmitting antenna based on frequency pre-coding. The antenna mainly solves the problems that a conventional array transmitting antenna structure is complicated in structure, large in size and high in price and amplitude phases are different due to multiple channels. The antenna comprises a waveform generator (1), a frequency modulator (2), a digital-to-analog converter (3), an upper converter (4), a low-noise amplifier (5), a frequency tracker (6) and an antenna oscillator (7). Multipath signals generated by the waveform generator are modulated and aggregated to form a single-channel signal through the frequency modulator, the signal sequentially undergoes formal transformation achieved through the digital-to-analog convert, frequency mixing achieving through the up-converter and amplification achieved through the low-noise amplifier and then an analog radio-frequency signal is obtained. The analog radio-frequency signal outputs a multichannel signal through orthogonal demodulation and filtering of the frequency tracker, and the multichannel signal is transmitted after formal transformation is carried out in an antenna oscillator signal mode. The antenna is simple in structure, small in size, low in cost, good in antenna amplitude phase uniformity and capable of reaching the same performance index as a conventional array transmitting antenna.
Owner:XIDIAN UNIV
Space-fed high-gain end-fire array antenna based on electromagnetic surface technology
ActiveCN109768389BHigh gainLow costWaveguide hornsAntenna adaptation in movable bodiesAntenna gainEngineering
The invention discloses a space-fed high-gain end-fire array antenna based on electromagnetic surface technology, comprising: a primary feed source for transmitting and / or receiving electromagnetic waves; and a single-layer and / or multi-layer extremely thin The combined surface of dielectric and metal is used to convert the electromagnetic wave emitted by the primary feed into an end-fire focused beam, or to converge the space wave received in the end-fire direction into the primary feed. The antenna of the embodiment of the present invention has the following significant advantages: (1) It only needs an extremely thin electromagnetic surface, and has the advantages of light weight, extremely low profile, and low manufacturing cost. (2) The reflection beam and the transmission beam are integrated, which increases the utilization rate of the antenna, saves the space occupied by the antenna, and further reduces the weight of the antenna. (3) The antenna gain will increase with the increase of the aperture size.
Owner:TSINGHUA UNIV
Dual-polarized single channel full-digital radio monitoring direction-finding mobile station system
InactiveCN100521574CSolve mutual couplingExpand the range of dynamic applicationsSpatial transmit diversityMobile stationPre processor
Owner:俞文蕴
Maritime radio communication monitoring and direction finding system
InactiveCN102147456BEasy to investigateSolve the problem of monitoring and direction findingRadio wave finder detailsRadio wave direction/deviation determination systemsDigital signal processingThird generation
The invention relates to a maritime radio communication monitoring and direction finding system which is characterized by comprising a vertical polarization monitoring and direction finding antenna array, a five-channel signal switching module, an amplification module, a five-channel receiver, a digital signal processor (DSP) processing module, a computer, a monitoring and direction finding controller, a 3rd generation (3G) antenna, a radio station antenna, a 3G router, a digital broadcasting station, a switchboard, an electronic compass, a global positioning system (GSP) module and a GSP antenna. The maritime radio communication monitoring and direction finding system has the advantages that: an interfering signal can be monitored better due to the working frequencies ranging from 30 to 500MHz; simultaneous direction finding of several coherent waves is realized; simultaneous direction finding and ultrahigh-resolution digital direction finding of transmitting signals with same frequency and different directions are realized; direction finding of digital frequency hopping, a spread spectrum and a burst signal is realized; monitoring and measuring on different frequency domains, different time domains and different modulation domains can be simultaneously performed during measuring due to respective local oscillation of five channels; the problem of cross coupling among all antenna array elements is solved; the coupling and the phase ambiguity among unit antennas are removed; and dynamic application ranges of received signals are expanded.
Owner:NANJING DEVING ELECTRONICS SYST
An optical image stabilization device and its control system based on piezoelectric stack
ActiveCN112817161BSolve mutual couplingReduce ineffective energy consumptionProgramme controlPrintersLoop controlControl system
The invention discloses an optical image stabilization device based on piezoelectric stacking, comprising a lens mounting bracket, the lens mounting bracket is located in the displacement amplifying direction of a first displacement amplifying module, and is connected to the first displacement amplifying module through a connecting block. In the first rectangular frame; the first rectangular frame is located in the displacement amplifying direction of the second displacement amplifying module, and the second displacement amplifying module is connected by a connecting block, and the whole is arranged in the second rectangular frame; the first and second displacement amplifying modules The modules are arranged in parallel, and the two extend under the action of the applied voltage, respectively producing positive and negative displacement outputs acting on the lens mount. The displacement amplifying module of the present invention decouples the displacement in the forward and reverse directions, so that the piezoelectric stack does not need a pre-voltage to maintain a certain pre-displacement in the initial stage. A closed-loop control system is also designed in the present invention, the displacement index is tested by the built-in displacement sensor of the image stabilization device, and the central processing unit module calculates and performs high-precision displacement control.
Owner:NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Dual-polarized single channel full-digital radio monitoring direction-finding fixed station system
InactiveCN100521802CSolve mutual couplingEliminate couplingRadio/inductive link selection arrangementsPre processorRadio frequency
The present invention is a dual-polarization single-channel all-digital radio monitoring and direction-finding fixed station system, including a vertical polarization interferometer direction-finding antenna array, a horizontal polarization interferometer direction-finding antenna array, a vertical polarization monitoring antenna, and a horizontal polarization monitoring antenna , the first rotary switch unit, the second rotary switch unit, the first selector, the printer, the first three-function RF amplifier, the second three-function RF amplifier, RF preprocessor, single-channel monitoring direction-finding receiver , PC, monitoring direction finding processor, second selector, first RF amplifier, nth RF amplifier, router. Advantages: The large-aperture active direction-finding antenna array is used, which solves the mutual coupling problem between each antenna array element well, and eliminates the coupling between unit antennas and phase ambiguity. Using correlation interferometer direction finding system, a pair of antenna elements are sampled at the same time to ensure synchronization, speed and accuracy. The RF preprocessor is used for phase / amplitude / phase conversion and storage of the RF signal. Amplifier with amplification, straight-through, and attenuation functions, automatic switching, expanding the dynamic application range of received signals, high direction finding accuracy and sensitivity, stable and reliable, and excellent cost performance.
Owner:俞文蕴
Nine-channel space spectrum super-resolution estimation monitoring and direction-finding mobile station system
InactiveCN102109593BGood anti-multipath effectHigh sensitivityRadio wave finder detailsRadio wave direction/deviation determination systemsStatistical analysisStructure of Management Information
The invention relates to a nine-channel space spectrum super-resolution estimation monitoring and direction-finding mobile station system, which comprises a small double-cone omnidirectional monitoring antenna, a nine-unit direction-finding antenna, an amplifier, a monopole monitoring antenna, a nine-channel signal switching module, a filter combiner, am amplifier module, a nine-channel receiver,a monitoring and direction-finding controller, a DSP (Digital Signal Processor) processing module, an imbedded industrial computer, a GPS (Global Positioning System) antenna, a GPS module, a 3G (3rd Generation) antenna, a 3G router, a power supply module, a remote control unit, an exchanger, and the like. The system has the following advantages: the system achieves remote and automatic monitoringand direction-finding of radio signals; an imbedded computer system is integrally arranged so that the structure is compact and light; a direction-dinging assembly solves the coupling problem betweenthe antenna arrays and prevents coupling and phase between unit antennas from being blurred; the structure is compact and light, and the spanning maintenance is convenient; the grid connection is flexible, and can support different wired / wireless network data transmissions; moreover, collection, compression coding, automatic task monitoring, statistic analysis and abnormal state alarm of wirelesssignals are realized.
Owner:NANJING DEVING ELECTRONICS SYST
Single-channel Array Transmitting Antenna Based on Bi-phase Code Modulation
The invention discloses a single-channel array transmitting antenna based on two-phase code modulation. The antenna mainly solves the problems that an existing common array transmitting antenna is complex in structure, large in size, high in price and inconsistent in amplitude phase due to multiple channels. The single-channel array transmitting antenna comprises a waveform generator (1), a first-level modulation phase shifter (2), a digital-to-analog converter (3), an up converter (4), a low-noise amplifier (5), a second-level modulation phase shifter (6) and an antenna element (7), wherein two-phase modulation is carried out on a signal produced by the waveform generator (1) through the first-level modulation phase shifter to form a single-channel signal in a polymerization mode, the signal sequentially undergoes signal form conversion through the digital-to-analog converter (3), frequency mixing through the up converter (4) and amplification through the low-noise amplifier (5), then a simulation radio-frequency signal is obtained, the signal undergoes orthogonal demodulation and filtering processing through the second-level modulation phase shifter (6) and is output as a multi-channel signal, and the signal undergoes signal form conversion through the antenna element (7) to be transmitted. On the premise that conventional array transmitting antenna performance is guaranteed, the structure is simplified, the size is reduced, and amplitude phase consistency of the antenna is improved.
Owner:XIDIAN UNIV
Nine-channel spatial spectrum estimation super-resolution monitoring direction-finding fixed station system
InactiveCN102075266BImplement automatic task monitoringSupport collectionTransmission monitoringThird generationEngineering
The invention discloses a nine-channel spatial spectrum estimation super-resolution monitoring direction-finding fixed station system, which is characterized by comprising a small biconical omnibearing monitoring antenna, a nine-unit direction-finding antenna array, two functional amplifiers, a monopole monitoring antenna, a nine-channel signal switching module, a filtering combiner, an amplifier module, a nine-channel receiver, a monitoring direct-finding controller, a digital signal processor (DSP) processing module, an embedded industrial personal computer, a global positioning system (GPS) antenna, a GPS module, a 3rd generation (3G) antenna, a 3G route, a power supply module, a continuous power supply module, a remote control unit and a switchboard which are shown in a figure in the specifications. The system has the advantage that: resolution and interception of a same-frequency multi-point transmitted signal can be solved. Coherent signals caused by a plurality of paths can be distinguished under a certain condition and can be widely applied to radio direction finding in a complex electromagnetic environment. A spatial spectrum system has high multipath effect resistance, high sensitivity, high monitoring and direction finding speeds and high accuracy, and can be used for quickly capturing various digital frequency hopping, frequency spreading and frequency hopping and spreading signals.
Owner:NANJING DEVING ELECTRONICS SYST
Movable double channel radio monitoring and relative interference direction testing system
InactiveCN1988409AEliminate phase ambiguityExpand the range of dynamic applicationsSpatial transmit diversityPropogation channels monitoringUltrasound attenuationLarge aperture
This invention relates to a movable dual channel radio monitor and related interference direction finding system including a movable vertical polarized related interferometer direction finding antenna array, high and low ends rotation switches, an antenna selector, a three-function RF amplifier, a dual channel monitor direction receiver, a monitor direction controller, an industrial control computer, a low end vertical polarized monitor antenna, a high end vertical polarized monitor antenna, a monitor / direction finding selector, a GPS, an electronic compass, an UPS, an environment moinitor and remote control supply unit and a concentrator, which is advantaged that the mutual couple and fuzzy phase among antenna arrays are overcome by applying large aperture active / passive movable direction finding antenna array, and a pair of antenna elements sample at the same time so as to secure synchronous, quick and accurate and the system has three functions of amplification, direct pass and attenuation.
Owner:俞文蕴
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