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30 results about "Counterpoise" patented technology
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In electronics and radio communication a counterpoise is a network of suspended horizontal wires or cables (or a metal screen), used as a substitute for an earth (ground) connection in a radio antenna system. It is used with radio transmitters or receivers when a normal earth ground cannot be used because of high soil resistance or when an antenna is mounted above ground level, for example, on a building. It usually consists of a single wire or network of horizontal wires, parallel to the ground, suspended above the ground under the antenna, connected to the receiver or transmitter's "ground" wire. The counterpoise functions as one plate of a large capacitor, with the conductive layers of the earth acting as the other plate.
Powerline pole tower ground resistance measurement method and its tester
ActiveCN101216515AEasy to measureEasy to carryEarth resistance measurementsMicrocontrollerMeasuring instrument
The invention relates to a method for measuring grounding resistance of power transmission tower and a corresponding measurer, which are used for solving the problems present in the prior measurement such as inconvenient line arrangement and measurement interference. The method comprises the following steps of: (1) well connecting a lightning wire with a tower to be measured; (2) completely disconnecting the connection between a tower body of the tower to be measured and a ground net; (3) connecting grounding leads of the tower to be measured in parallel; (4) connecting a tower grounding resistance measuring instrument between the tower body and the leads; (5) resetting the instrument and executing measurement; and (6) reading the measured value. The measurer comprises a singlechip system, a keypad / display interface, a D / A converter, a V / I converter and a power amplifier circuit, an output current and ripple current sampling circuit, an A / D converter, a power supply system and a power voltage monitor and reset circuit. The invention has the advantages of convenient measurement and more accurate measurement by obviating power frequency interference and interference resulting from mutual interference effect in conventional method.
Owner:WUHAN NARI LIABILITY OF STATE GRID ELECTRIC POWER RES INST +1
Diagnosis device and diagnosis method for corrosion of earth screen of large-size transformer substation
ActiveCN102707191AReduce security risksEasy to repeat measurements regularlyResistance/reactance/impedenceFault locationCounterpoiseTransformer
The invention provides a diagnosis device for corrosion of an earth screen of a large-size transformer substation. The diagnosis device comprises a distribution type collection box, a signal collection device, a movable calculation PC (personal computer) and a 3G (3rd Generation) wireless communication terminal, wherein the distribution type collection box is formed by a box body, a protection cover, binding posts and a measuring lead wire, wherein the protection cover detachably covers the box body; a plurality of binding posts are vertical in a mutually-insulating manner and pass through a bottom plate of the box body; the measuring lead wire is a two-core flexible lead core; one end of the measuring lead wire is electrically with the lower ends of the binding posts; and the other end of the measuring lead wire is welded with a lead-up wire of a grid node of the earth screen. The diagnosis device and the diagnosis method for the corrosion of the earth screen of the large-size transformer substation can be widely applied to corrosion fault detection of the earth screen of the transformer substation which is put into operation and are particularly suitable for the large-size transformer substation which has a larger occupied area and higher safety requirements. Furthermore, the diagnosis device and the diagnosis method for the corrosion of the earth screen of the large-size transformer substation can also be widely applied to other systems with the earth screens, such as steel, chemical engineering, a power plant and the like and have extremely great required amount and an extremely wide application prospect.
Owner:ELECTRIC POWER RES INST OF GUANGDONG POWER GRID +1
Coupling and counterpoise apparatus for radio communication device
The present invention provides an apparatus for coupling a radio communication device to a host system. The apparatus comprises a housing including a counterpoise operatively coupled to the radio communication device. The apparatus also comprises a signal pathway operatively coupling the radio communication device to the host system. The apparatus thereby provides a counterpoise for the radio communication device which is external to both the host system and the radio communication device.
Owner:NETGEAR INC
Radio communication apparatus
InactiveUS20090225819A1Near-field transmissionPolarisation/directional diversityElectromagnetic couplingElectronic systems
The present invention provides a radio communication apparatus for use with a host system. The host system includes an electromagnetic body which acts as a ground plane or counterpoise for the radio communication apparatus. The apparatus comprises an electronics system coupled to the host system, a radio module including a radio electromagnetic body and optionally a radio electronics system, a signal pathway operatively coupling the electronics system with the radio module, and a conductive enclosure. The conductive enclosure provides electromagnetic isolation of the signal pathway. The conductive enclosure is further configured, by inclusion of a wave trap, to impede electromagnetic coupling between the radio electromagnetic body and the host electromagnetic body via the conductive enclosure.
Owner:NETGEAR INC
Lightning protection grounding method of shared iron tower
ActiveCN111244629AThe calculation formula is simpleMeet the power systemConnection to earthAntenna earthingsGrounding gridCounterpoise
The invention relates to a lightning protection grounding method for a shared iron tower, a lightning protection method is provided according to the carrying position of a 5G communication antenna, and when an antenna is located at the tower top (not within the protection range of a lightning rod), a lightning protection grounding down lead is arranged on an antenna fixing rod; when the antenna islocated at other positions (within the protection range of the lightning rod), the tower body is used as a grounding conductor; and a grounding resistance calculation formula is optimized, meanwhile,the influence of the horizontal grounding body, the vertical grounding body and the radial grounding body is considered, and an earth screen transformation scheme is provided based on an existing grounding system of an electric iron tower, that is to say, an annular grounding device is added on the basis of an original grounding grid. The annular grounding device and the original grounding grid are located on the same horizontal plane, the annular grounding device and the original grounding grid are mutually welded and communicated once every 3-5 m, the annular grounding device comprises a horizontal grounding body, a vertical grounding body and a radial grounding body, and finally the shared iron tower grounding resistor meets the requirements of a power system and a communication systemat the same time.
Owner:NORTH CHINA UNIVERSITY OF TECHNOLOGY
Low excitation impedance transformer single-phase grounding protection device and protection method
InactiveCN105703349ALimit short circuit currentImprove protectionEmergency protective arrangements for limiting excess voltage/currentCounterpoiseImpedance transformer
The invention relates to a low excitation impedance transformer single-phase grounding protection device and a protection method. Through bypass grounding current shunting, grounding arcs are eliminated, the grounding protection effect is improved, grounding and line selection can be realized, and line selection and fault positioning are accurate. The device comprises three single-phase breakers, a low excitation impedance transformer, a signal generator, a zero sequence current transformer and a control detection device, wherein wire incoming sides of the three single-phase breakers are respectively connected with a corresponding bus through an isolation switch or a separation breaker, wire outgoing sides are connected with an original edge winding of the low excitation impedance transformer, the low excitation impedance transformer is a single-phase three winding dry core transformer having the original edge winding, a secondary edge main winding and a secondary edge secondary winding, one end of the original edge winding is connected with a ground network or a ground row through the zero sequence current transformer, the secondary edge main winding is connected with the signal generator, the secondary edge secondary winding is connected with the control detection device, the secondary edge main winding is for signal injection, and the secondary edge secondary winding is for signal measurement.
Owner:辽宁拓新电力电子有限公司
Radio frequency interface circuit
ActiveCN111542168AEliminate continuityEliminate the differences between different frequency bandsHigh frequency circuit adaptationsAntennas earthing switches associationUltra-widebandCounterpoise
The invention discloses a radio frequency interface circuit which comprises a PCB, a first bonding pad, a second bonding pad and a transmission line are sequentially arranged on the top layer of the PCB from one end to the other end of the PCB, and the first bonding pad and the second bonding pad are used for dragging tin to weld a shielding ground net and a core wire of a shielding cable respectively; the PCB is also provided with a first impedance matching network used for compensating impedance. The first impedance matching network comprises a matching branch knot and a metallized through hole, the matching branch knot is arranged on the bottom layer of the PCB, a second hollowed-out area is arranged in the periphery of the matching branch knot, the metallized through hole is formed inthe PCB, and the two ends of the metallized through hole are connected with the second bonding pad and the matching branch knot respectively. According to the invention, the inherent impedance discontinuity of the original radio frequency interface circuit and the difference of different frequency bands can be eliminated, and the high-frequency standing-wave ratio and the insertion loss are reduced, so that the ultra-wideband impedance matching is realized.
Owner:FENGHUO COMM SCI & TECH CO LTD
Substation lightning rod capable of serving as 5G base station antenna tower
InactiveCN112086861ARealize joint sharingImprove resource utilizationAntenna supports/mountingsCorona dischargeCounterpoisePrivate network
The invention discloses a substation lightning rod capable of being used as a 5G base station antenna tower. The substation lightning rod comprises a tower body, an iron tower horizontal ground net which is arranged at the bottom of the tower body and a lightning rod needle tip which is arranged at the top of the tower body, wherein the tower body adopts a three-tube lattice type, and a pluralityof layers of platforms for installing base station antenna equipment are respectively arranged at certain heights from the tower body to the ground. The independent lightning rod of the transformer substation is specially designed and integrated with the base station antenna equipment, and the platform for installing the power private network base station antenna equipment and the operator 5G basestation antenna equipment is arranged, so combined sharing of the lightning rod and the antenna tower of the transformer substation and open sharing of the private network and public network infrastructure are realized; and synchronous design, synchronous construction and synchronous acceptance are carried out with a transformer substation infrastructure project, so purposes of improving the resource utilization rate and reducing the investment are achieved, and meanwhile, the full-life-cycle design concept is also met.
Owner:POWERCHINA HEBEI ELECTRIC POWER SURVEY & DESIGN INST CO LTD +1
Communication method, device and system and storage medium
ActiveCN113825254AQuality improvementImprove securityNetwork topologiesConnection managementCommunications systemStation
The invention discloses a communication method, device and system and a storage medium, and relates to the technical field of communication. A complete communication system is formed by deploying a satellite-borne base station and a satellite-borne UPF respectively corresponding to a first terminal and a second terminal in a low-orbit satellite, and deploying a satellite-borne router and a gateway station on the ground. The method comprises the following steps: receiving a communication request of a first terminal requesting to communicate with a second terminal in a system; determining a communication scene type between the first terminal and the second terminal based on the communication request; and executing point-to-point communication operation between the first terminal and the second terminal based on the communication scene type. Finally, the purpose of providing point-to-point voice or data service communication between the satellite terminals within the coverage range of the same satellite and different satellites or between the satellite terminal and the earth screen terminal is achieved, and the high-quality and high-safety communication requirements of users can be fully guaranteed.
Owner:中国星网网络创新研究院有限公司
Earth screen shunt vector test system based on GPS source table synchronization and application method thereof
InactiveCN110687380AShorten test timeReduce testing workloadElectrical testingRadio-controlled time-piecesTest efficiencyCounterpoise
The invention discloses an earth screen shunt vector test system based on GPS source table synchronization and an application method thereof. According to the invention, a non-master-slave mode is adopted by the earth screen shunt vector test system, a source GPS module is used for providing a pulse per second edge to provide synchronous signals for sampling triggering of each shunt phasor and control triggering of a total test current; each phasor acquisition is started at the same moment and the pulse per second edge is synchronized with the zero crossing point of a constant current source test signal; and the phase of the constant current source test signal is used as the reference phase of each remote shunt vector, and the data acquired by an acquisition channel is used to calculate the time difference based on the pulse per second edge provided by a table GPS module so as to obtain the phase difference relative to the constant current source test signal. According to the invention, source and meter synchronization is achieved, data transmission between the source and the meter is not needed, the test time is greatly reduced, the test efficiency is improved, the multichannel measurement and data acquisition processing technology is adopted, a plurality of shunting points can be tested at the same time, and the test workload is greatly reduced.
Owner:STATE GRID HUNAN ELECTRIC POWER +2
Transmission tower grounding state sensing device
PendingCN111965564AGuaranteed uptimeAvoid harmShort-circuit testingMeasurement using digital techniquesGrounding gridTransmission tower
The invention discloses a transmission tower grounding state sensing device. The device comprises an impact current wave generation module, an acquisition module, an A / D conversion module, a data processing module, a data storage module, a judgment module and a mobile terminal, and the impact current wave generation module, the acquisition module, the A / D conversion module, the data processing module, the data storage module, the judgment module and the mobile terminal are sequentially connected through wireless communication. According to the invention, the device achieves the online monitoring of the grounding grid conduction condition of the tower grounding grid under the conditions of no power failure and no excavation of the grounding grid, timely finds out the accident hidden troubles, timely locates a fault point, timely provides a scientific and reliable basis for the maintenance and transformation of the grounding grid, prevents the possible damages caused by the faults of thegrounding grid, and guarantees the safe and reliable operation of a power system.
Owner:BAICHENG POWER SUPPLY CO OF STATE GRID JILIN ELECTRIC POWER CO LTD
Double-end grounding loop resistance and ground screen resistance measuring device and method
PendingCN112904087AAccurate measurementImprove accuracyEarth resistance measurementsElectrical resistance and conductanceCounterpoise
The invention discloses a double-end grounding loop resistance and ground screen resistance measuring device and method.The device comprises a measuring device for outputting constant current to a measuring loop; the measuring loop comprises a measured branch, a grounding bar and a ground screen which are connected in series; the grounding bar is provided with a sampling clamp for measuring voltage signals of the grounding bar; and the output end of the sampling clamp is connected with the input end of the measuring device. According to the method, the sampling clamp and the measuring device are used for measuring the voltage of the grounding bar to obtain the shunt proportion according to the voltage proportion, and then the measured branch resistance is calculated. According to the invention, under the condition that the grounding wire is not dismounted, the actual current value flowing through each branch can be accurately measured, so that the loop resistance or the ground screen resistance of each branch can be accurately measured, and the detection accuracy and the working efficiency are improved.
Owner:BAODING SUPERMAN ELECTRONICS
Indoor ground screen reconstruction method for S band continuous wave high-power microwave system
InactiveCN102916319BConvenient groundingAvoid damageLine/current collector detailsConnection contact member materialKlystronGrounding grid
The invention discloses an indoor ground screen reconstruction method for an S band continuous wave high-power microwave system. The method specifically includes the steps: determining pile burying positions according to indoor actual situations; drilling at the pile burying positions according to the size of piles; burying the piles; producing connectors of the piles and a ground screen; connecting the piles by the produced connectors, and deeply burying the piles and part of the connectors, wherein the piles and the connectors are in one to one correspondence; laying the ground screen according to requirements of the high-power microwave system; connecting the ground screen with the connectors exposed out of the ground; and connecting the ground screen with ground points of the microwave system. The method is applied to the discharge experiment of an EAST nuclear fusion device in spring in 2012, a grounding mode of a 2.45GHz / 4MW low-hybrid wave system is optimized, and damage of high impulse current to devices of the low-hybrid wave system is avoided during repeated klystron overcurrent.
Owner:INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
Secondary cable identification method and device based on asymmetric phase signals
ActiveCN113064103AFind safeFound validSpectral/fourier analysisElectrical testingCounterpoiseControl theory
The invention discloses a secondary cable identification method based on asymmetric phase signals, and relates to the field of cable identification. At present, when a secondary cable is checked, the cable is disassembled and dragged, and accidents are easy to occur. The method comprises the steps of processing an induced current waveform, and obtaining a signal source frequency current amplitude, a current cycle integral value and a current time integral value through FFT decomposition; if the difference between the signal source frequency current amplitude and the current cycle integral value generated on a suspected cable and the corresponding information applied on a cable to be searched is smaller than a set threshold value, and the difference between the induced current integral value and the corresponding information under the integral multiple time of the signal cycle and the power frequency cycle is smaller than the set threshold value, determining that the suspected cable is the opposite end of the cable to be searched. According to the technical scheme, the cable can be safely, quickly and effectively found at low cost, and the starting end of the cable can be accurately identified under the condition of poor connection of an earth screen, so that the personnel and the time are saved, and the working efficiency is improved.
Owner:ZHOUSHAN ELECTRIC POWER SUPPLY COMPANY OF STATE GRID ZHEJIANG ELECTRIC POWER
A double-protection grounding wire method for DC traction power supply double-insulated catenary system
ActiveCN111806306BTimely replacementEasy to operateRail devicesPower supply line detailsCounterpoiseStructural engineering
The invention discloses a double-protection grounding wire method for a double-insulation catenary system for DC traction power supply, which includes a first protection grounding wire, laid through the line, connected to the station ground grid at both ends, and connected to each pillar respectively, as a catenary The short-circuit monitoring path when the broken wire overlaps the pillar; and the second protective grounding wire, which is laid through the line, connected to the ground network of the station at both ends, and connected to the insulating neutral section between the basic insulation and the auxiliary insulation on each pillar respectively The connection, insulated from the post, serves as a monitoring path for a flashover or failure of the basic insulation. The double protection grounding wire provided by the invention is laid through the line, and both ends are connected to the ground network of the station, which provides the monitoring of basic insulation flashover or damage and the short circuit monitoring path when the catenary breaks and overlaps the pillars, and at the same time meets the safety requirements. Under the premise of reliability, taking into account the coordination needs of urban landscape.
Owner:CHINA RAILWAY ELECTRIFICATION SURVEY DESIGN & RES INST
A secondary cable identification method and device based on an asymmetric phase signal
ActiveCN113064103BFind safeFound validSpectral/fourier analysisElectrical testingCounterpoiseNetwork connection
The invention discloses a secondary cable identification method based on an asymmetrical phase signal and relates to the field of cable identification. At present, there are behaviors of dismantling and dragging cables during the secondary cable inspection, which is prone to accidents. The present invention processes the induced current waveform, and obtains the signal source frequency and current amplitude, current cycle integral value, and current time integral value through FFT decomposition; if the signal source frequency current amplitude, current cycle integral value and If the difference between the corresponding information applied on the search cable is less than the set threshold, and the difference between the integrated value of the induced current and the corresponding information under the integral multiple of the signal cycle and the power frequency cycle is less than the set threshold, then the suspected cable is determined to be the cable to be found the opposite end. The technical solution can find the cable safely, quickly, effectively and at low cost, and can also accurately identify the starting end of the cable when the ground network connection is poor, saving personnel and time, and improving work efficiency.
Owner:ZHOUSHAN ELECTRIC POWER SUPPLY COMPANY OF STATE GRID ZHEJIANG ELECTRIC POWER
Method for quickly laying counterpoise
PendingCN113701554AShorten laying timeReduce usage requirementsLine/current collector detailsCompressed gas gunsCounterpoiseStructural engineering
The invention discloses a method for quickly laying a counterpoise. The method comprises the following steps that 1, an erection site is selected, and the center position of the counterpoise is selected; 2, a throwing frame of a pneumatic throwing device is assembled and fixed to the center position of the selected counterpoise, throwing bombs and a take-up wheel are moved to the position near the throwing frame, and each counterpoise wire is connected to one throwing bomb; 3, according to the design requirement, the interval angle of the counterpoise wires is determined, and the throwing direction and angle are adjusted; 4, according to the design requirement, the counterpoise wires are sequentially in short connection through a short connection line, and counterpoise laying is completed; and step 5, during withdrawing, firstly the short connection wire is disconnected, then the counterpoise wires are sequentially taken up by using the take-up wheel to finish a withdrawing task, and then throwing frame and the throwing bombs are recovered in the following process. According to the method, the pneumatic throwing device is adopted to lay the counterpoise, so that the operation is simple, the use requirements for manpower and machine tools are lowered, and the counterpoise laying time is greatly shortened.
Owner:中国电波传播研究所
A detection device for concealed conduction between transmission towers and ground grids
ActiveCN106872843BEliminate distractionsImprove safe operationTransmission systemsFault location by conductor typesGrounding gridTransmission tower
A transmission tower and grounding grid concealed conduction detection device comprises a measurement host and an electric current test device, wherein the measurement host comprises a measurement host shell, the measurement host shell is provided with two signal output ends, a display screen, a storage battery, a running lamp and a power button, the inner part of the measurement host shell is provided with a main control processor, a display module, a signal injection module and a wireless communication module A, t he display module, the signal injection module and the wireless communication module A is connected with the main control processor respectively, the electric current test device comprises of a controller and a current sampling device, and the current sampling device comprises a flexible electric current coil, a sampling amplify module and a wireless communication module B which are successively connected. The system uses a flexible electric current coil measurement technology, and has the advantages of eliminating interference of an overhead ground wire to a measurement result and injecting into a signal directly through an instrument.
Owner:FUJIAN YOUDI ELECTRIC POWER TECH
Dual antenna wireless communication device in a load control system
PendingCN113660698ASimultaneous aerial operationsNetwork traffic/resource managementTelecommunicationsCounterpoise
Owner:LUTRON TECH CO LLC
Roof process type nodirectional beacon reflecting net and construction method thereof
ActiveCN111101709ASolution areaSolve a lot of materialsRoof coveringBuilding material handlingReinforced concrete columnGlass fiber
Owner:衡水通广通信导航设备有限公司
Dual antenna wireless communication device in load control system
ActiveCN108352615ASimultaneous aerial operationsRadiating elements structural formsTelecommunicationsCounterpoise
A wireless communication device for use in a load control system for controlling one or more electrical loads may comprise a counterpoise, a first and second antennas, a RF communication circuit and acontrol circuit. The two antennas may be oriented differently and spaced apart from each other. For example, the first antenna may extend perpendicularly from the counterpoise while the second antenna extends in a plane substantially parallel to the counterpoise. The first antenna may extend from the counterpoise at a point substantially central to the counterpoise while the second antenna may extend along a perimeter of the counterpoise. The RF communication circuit may transmit wireless signals via the first and second antennas. The control circuit may cause the RF communication circuit totransmit a first wireless signal in a first time slot and a second wireless signal in a second time slot.
Owner:LUTRON TECH CO LLC
Accelerator ground wire system based on EMC and design method
PendingCN114828607ASimple planHigh degree of engineering applicationConnection contact member materialEarth/grounding circuitsGrounding gridProcess equipment
The invention relates to an accelerator ground wire system based on EMC (Electro Magnetic Compatibility) and a design method, and the system comprises a universal ground net which is arranged at a universal equipment side and is a main grounding net of universal equipment, and the universal equipment is connected with the universal ground net through a low-voltage power distribution system of a power distribution room to realize safe grounding; the process ground net is laid nearby process power distribution equipment and is a main grounding net of the process power distribution equipment, the process equipment is connected with the process ground net through a grounding box, and differential grounding of the process ground net is achieved through the grounding box; and the grounding well is used for connecting the general ground screen and the process ground screen, realizing high-frequency isolation and power frequency combination between the general ground screen and the process ground screen, and serving as a grounding test point. The device can give consideration to safety protection and electromagnetic compatibility, and can be applied to the field of accelerator electromagnetic compatibility and grounding.
Owner:INST OF MODERN PHYSICS CHINESE ACADEMY OF SCI
Antenna element
ActiveUS11437716B1High frequencyImprove radiation efficiencyAntenna earthingsElongated active element feedCounterpoiseEngineering
An antenna element is provided that is adapted to provide a more consistent horizontally polarized signal. In one embodiment, a radiator and counterpoise are provided with the counterpoise being disposed between the radiator and a ground plane in use. The feed location for feeding the radiator and the counterpoise is significantly spaced from the ground plane in use and the radiator and counterpoise diverge relative to this feed location.
Owner:FIRST RF CORP
Double-protection grounding wire method of direct-current traction power supply double-insulation contact network system
ActiveCN111806306ATimely replacementEasy to operateRail devicesPower supply line detailsContact networkCounterpoise
The invention discloses a double-protection grounding wire method of a direct-current traction power supply double-insulation contact network system. The method comprises the steps: laying a first protection grounding wire along a line in a through manner, enabling two ends of the first protection grounding wire to be connected to a station ground network, and enabling the first protection grounding wire to be connected with each supporting column respectively as a short-circuit monitoring path when a contact network is disconnected and overlapped with the supporting columns; and laying a second protection grounding wire is along the line in a through manner, enabling the two ends of the second protection grounding wire to be connected to the station ground network, enabling the second protection grounding wire to be connected with an insulation neutral section between the basic insulation and the auxiliary insulation on each supporting column, enabling the second protection groundingwire to be insulated from the supporting column and to serve as a monitoring path for basic insulation flashover or damage. The double-protection ground wire is laid along the line in the through mode, the two ends of the double-protection ground wire are connected to the station ground network, a basic insulation flashover or damage monitoring and a short circuit monitoring path when the contactnetwork is disconnected and overlapped with the supporting columns are provided, and meanwhile an urban landscape coordination requirement is met on the premise that safety and reliability are met.
Owner:CHINA RAILWAY ELECTRIFICATION SURVEY DESIGN & RES INST
A radio frequency interface circuit
ActiveCN111542168BAchieve Impedance MatchingMiniaturizationHigh frequency circuit adaptationsAntennas earthing switches associationUltra-widebandShielded cable
The invention discloses a radio frequency interface circuit, which includes a PCB board. On the top layer of the PCB board, from one end to the other end, there are sequentially provided a first pad, a second pad and a transmission line. The first pad plate and the second pad are respectively used for dragging the shielding ground net and the core wire of the tin welding shielded cable; the first impedance matching network for compensating the impedance is also provided on the PCB board, and the first impedance matching network includes matching stubs and Metallized vias, the matching stubs are set on the bottom of the PCB, and a second hollow area is set around the matching stubs, the metallized vias are set in the PCB board, and the two ends of the metallized vias are respectively connected to the second pad and the matching stubs . The invention can eliminate the inherent impedance discontinuity of the original radio frequency interface circuit and the difference of different frequency bands, reduce the high-frequency standing wave ratio and insertion loss, thereby realizing ultra-wideband impedance matching.
Owner:FENGHUO COMM SCI & TECH CO LTD
A craft-type omnidirectional beacon reflection net on the roof of a building and its construction method
ActiveCN111101709BGuaranteed heightReduce Signal ErrorRoof coveringBuilding material handlingReinforced concrete columnCounterpoise
A craft type omnidirectional beacon reflective net on the roof and its construction method, the reflective net is arranged on the roof of the main structure, and also includes the steel frame of the reflective net and several roof columns, the roof column is arranged on the top of the main structure, It is fixedly connected with the main structure and the steel frame of the reflection net at the same time. The column on the roof is a reinforced concrete column, which is poured integrally with the load-bearing column of the main structure, and the embedded board is buried on the side. The buried plate is welded and fixed. The reflective net is installed directly on the roof without land approval, which effectively solves the technical problems of large floor area, high material consumption, and high cost of the ground net foundation point; the height is guaranteed, the signal error is small, and the result is accurate; the roof column cooperates with the reflective net The steel frame is fixed to effectively resist the top displacement caused by wind load and ensure the rigidity. The overall stability and strength are high, which can effectively reduce the vibration and swing of the top antenna and prevent signal instability; set up fiberglass guardrails and hollow pattern plates to ensure personnel safety Strengthen the signal reflection strength.
Owner:衡水通广通信导航设备有限公司
Indoor ground screen reconstruction method for S band continuous wave high-power microwave system
InactiveCN102916319AConvenient groundingAvoid damageLine/current collector detailsConnection contact member materialKlystronGrounding grid
The invention discloses an indoor ground screen reconstruction method for an S band continuous wave high-power microwave system. The method specifically includes the steps: determining pile burying positions according to indoor actual situations; drilling at the pile burying positions according to the size of piles; burying the piles; producing connectors of the piles and a ground screen; connecting the piles by the produced connectors, and deeply burying the piles and part of the connectors, wherein the piles and the connectors are in one to one correspondence; laying the ground screen according to requirements of the high-power microwave system; connecting the ground screen with the connectors exposed out of the ground; and connecting the ground screen with ground points of the microwave system. The method is applied to the discharge experiment of an EAST nuclear fusion device in spring in 2012, a grounding mode of a 2.45GHz / 4MW low-hybrid wave system is optimized, and damage of high impulse current to devices of the low-hybrid wave system is avoided during repeated klystron overcurrent.
Owner:INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
Antenna-retaining device for a motor vehicle, and motor vehicle having an antenna-retaining device
PendingCN113348592AAntenna supports/mountingsAntenna adaptation in movable bodiesCounterpoiseMechanical engineering
The invention relates to an antenna-retaining device (10) for a motor vehicle. The antenna-retaining device (10) comprises: an antenna carrier plate (14) for retaining a monopole antenna (12) in an emitting position; and a motor-vehicle coupling means (18) for fastening the antenna carrier plate (14) to a vehicle body (20). In the emitting position, a distance exists between the retained monopole antenna (12) and the vehicle body (20). The antenna carrier plate (14) is electrically conductive and thus forms an electrical counterpoise to the monopole antenna (12). The antenna-retaining device (10) also comprises an electrically conductive tab element as a counterpoise extension (24). The antenna carrier plate (14) and the counterpoise extension (24) are interconnected. When the monopole antenna (12) is retained in the emitting position, the monopole antenna and the counterpoise extension (24) are arranged on opposite sides of the antenna carrier plate (14), and a surface of the counterpoise extension and a planar emitting region or a longitudinal axis of the monopole antenna include an angle in the range of 90 degrees to 180degrees.
Owner:AUDI AG
A wind profile radar fence and its installation method
ActiveCN107607910BImprove shielding effectReduce distractionsRadio wave reradiation/reflectionICT adaptationRadar antennasWind profiler
The invention relates to a wind profile radar seine and an installation method thereof. The wind profile radar seine comprises multiple seine floors, a foundation, an earth net, conduction members, aplurality of columns, first net pieces, second net pieces, and third net pieces. The seine floors are arranged at intervals and form a square. The foundation is fixedly arranged on the ground. One side of each seine floor is connected with a fixing member, each fixing member is fixedly arranged inside the foundation, the outer side of each fixing member is provided with a connecting member, and the connecting members enable the fixing members to be connected to form an integral body. The earth net is arranged underground, and is connected with the seine floors through the conduction members. The columns are correspondingly arranged on the seine floors in a vertical manner, and first and second net pieces are arranged between every two adjacent columns. The first net pieces, arranged in a vertical manner, are positioned at the lower ends of the columns. The second net pieces, positioned at the upper ends of the columns, are arranged in an inclined manner by facing the outer sides of thesquares. The second net pieces at four corners are connected through the third net pieces. The wind profile radar seine exhibits a better shielding property and reduces interference in radar antennasignals.
Owner:BEIJING INST OF RADIO MEASUREMENT
Lightning protection grounding method of shared tower
ActiveCN111244629BThe calculation formula is simpleConnection to earthAntenna earthingsCounterpoiseElectrical conductor
The invention relates to a lightning protection and grounding method for a shared iron tower. According to the mounting position of the 5G communication antenna, lightning protection protection methods are respectively proposed. Down conductor for lightning protection grounding; when the antenna is located in other locations (within the protection range of the lightning rod), the tower body is used as the grounding conductor; and the calculation formula of grounding resistance is optimized, taking into account the horizontal grounding body, vertical grounding body and radial grounding body Based on the existing grounding system of the power tower, a ground grid transformation plan is proposed, that is, a ring grounding device is added on the basis of the original ground grid, and the ring grounding device is on the same level as the original ground grid, and every 3‑5m Welded and connected to each other once, the ring grounding device includes a horizontal grounding body, a vertical grounding body and a radial grounding body, so that the grounding resistance of the shared iron tower can meet the requirements of the power system and the communication system at the same time.
Owner:NORTH CHINA UNIVERSITY OF TECHNOLOGY
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