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109results about How to "Good omnidirectional" patented technology
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Omni-directional antenna in an hourglass-shaped vase housing
ActiveUS20100289716A1Good omnidirectionalHigh gainAntenna supports/mountingsRadiating elements structural formsDirectional antennaEngineering
An antenna structure for receiving digital television broadcast signals includes a vase antenna housing having a generally hourglass shape with conically-shaped upper and lower segments joined together to define a narrower diameter middle portion. The antenna structure further includes a signal receiving antenna etched on the inner surface of the vase antenna housing. The signal receiving antenna conforms to the shape of the vase antenna housing and thereby exhibits an arcuate, partial hourglass shape. The signal receiving antenna may be a cloverleaf antenna or a spiral antenna.
Owner:VOXX INTERNATIONAL
Data transmission system and data transmission method for underwater acoustic network
InactiveCN101567728AIncrease success rateImprove throughputFree-space transmissionData switching networksDigital signal processingTelecommunications link
The invention relates to a data transmission system for an underwater acoustic network, which comprises a plurality of independent underwater nodes, wherein each underwater node is equivalently connected with at least the other underwater node. The data transmission system also comprises a transmitting optical antenna, a receiving optical antenna, a light source, an optical modulator, an optical receiver, an underwater acoustic transducer / receiving transducer, a digital signal processor and a positioning module, wherein the positioning module is provided with a rotating device and used for completing the alignment between the light source and the optical receiver; the transmitting optical antenna, the light source, the optical modulator and the digital signal processor are in signal connection with each other in turn; the receiving optical antenna, the optical receiver and the digital signal processor are in signal connection with each other in turn; the digital signal processor is also in signal connection with the positioning module and the underwater acoustic transducer / receiving transducer respectively; and the light source is a blue-green laser source. The invention also relates to a data transmission method for the underwater acoustic network. The invention reduces the collision probability of data in the transmission process, improves the success rate of the construction of a communication link, saves the network bandwidth, and improves the network throughout.
Owner:SOUTH CHINA UNIV OF TECH
Highly durable hydrophobic antireflection structures and method of manufacturing the same
ActiveUS9400343B1Minimize reflection lossGood broadbandCoatingsPhotovoltaic energy generationReflection lossRefractive index
Durable hydrophobic antireflection structures for optical elements, optical windows, and front sheets of encapsulated photovoltaic and photonic devices are disclosed which can minimize reflection losses over the entire accessible portion of the solar spectrum simultaneously provide self-cleaning and finger-print-free surface. Reduced reflectance and self-cleaning surfaces are resulted from coating the front sheet of encapsulated device with combination of nonporous and porous nanostructured materials such as silicon dioxide nanorods and PTFE. Step-graded antireflection structures can exhibit excellent omnidirectional performance, significantly outperforming conventional quarter wavelength and low-high-low refractive index coatings. Methods of constructing nanostructured durable optical coatings with hydrophobic surfaces are disclosed that can cover large-area ridged and flexible substrates.
Owner:MAGNOLIA OPTICAL TECH
Dual-band omnidirectional WIFI (wireless fidelity) antenna
InactiveCN104795630AHigh gainGood omnidirectionalSimultaneous aerial operationsRadiating elements structural formsPhysicsOmnidirectional antenna
The invention is applicable to the technical field of wireless communication devices and discloses a dual-band omnidirectional WIFI (wireless fidelity) antenna. The dual-band omnidirectional WIFI antenna comprises a dielectric plate and two pairs of dual-band radiating elements, the dual-band radiating elements are connected to the dielectric plate, a balance microstrip line is connected between the two dual-band radiating elements, each dual-band radiating element comprises two low-frequency radiating arms and two high-frequency radiating arms, and the low-frequency radiating arms and the high-frequency radiating arms are symmetrically arranged on two sides of the balance microstrip line. The dual-band omnidirectional WIFI antenna is wide in a covered range and high in gain.
Owner:TP-LINK
Miniature wideband antenna for 5G mobile networks
InactiveUS20170194720A1Reduce sizeWide operation bandParticular array feeding systemsNetwork topologiesFrequency bandDielectric substrate
The present invention provides a miniature wideband antenna for 5G, which includes a dielectric substrate, a coplanar waveguide feed structure on a front of the dielectric substrate, a main radiator, a second and third radiators and a first radiator on a back of the dielectric substrate. The antenna is small in size with operation band of 3 GHz-30 GHz which covers the various 5G frequency band and covers the current wireless modes of Wi-MAX, W-LAN, UWB and so on. The antenna guarantees future compatibility for various complicated communication modes and has good perspectives for many applications. Based on the antenna, the double-unit and four-unit MIMO antenna adopts orthogonal polarization and metamaterial unit. Thus, high unit separation is achieved without increase on the size of the antenna unit. The present invention has wide applications in small mobile device such as cell phone and laptop.
Owner:UNIV OF ELECTRONIC SCI & TECH OF CHINA
Mini enhanced dual-polarization omnidirectional ceiling antenna
ActiveCN106602230AImprove out of roundnessImprove consistencyParticular array feeding systemsRadiating elements structural formsMiniaturizationImpedance matching
The invention provides a mini enhanced dual-polarization omnidirectional ceiling antenna. The antenna comprises a single cone, a horizontal polarization unit and a step-shaped floor which are arranged in a vertically coaxial and centrally overlapped manner from top to bottom successively, the single cone comprises a first single cone radiator and a second single cone radiator which are arranged in a crossing manner, the bottom of the single cone is provided with a feed point, and a coaxial feed cable is connected to the feed point in the bottom of the single cone by penetrating the step-shaped floor and the horizontal polarization unit from bottom to top successively. Within the frequency range from 0.8GHz to 2.70GHz, the single-cone ceiling antenna realizes effective impedance match, an ideal omnidirectional radiation performance, a substantial edge coverage enhanced effect, a consistent in-band coverage range, higher efficiency, higher port isolation degree (better than -24dB), small size and low profile and is suitable for indoor coverage. The antenna is also characterized by being novel in ideas, clear in principles, universal in methods, easy to realize, low in cost and suitable for batch production, the antenna can be used to replace a routine dual-polarization omnidirectional ceiling antenna, and can be used for design and improvement of a vertical-polarization enhanced omnidirectional ceiling antenna and a planar Alford loop antenna.
Owner:TONGYU COMM INC
Omnidirectional dual circularly polarized antenna
InactiveCN104505578AImprove Radiation Efficiency and GainGood omnidirectional performance and dual circular polarization performanceAntenna arraysRadiating elements structural formsPhysicsFrequency band
The invention provides an omnidirectional dual circularly polarized antenna which is an integrally coaxial structure; a medium is filled between inner and outer conductors which are coaxially arranged; rectangular gaps (with an included angle of 90 degrees) which are perpendicular with one another are formed in the conductor wall of the outer conductor of an antenna radiation structure; the upper and the lower gaps which are perpendicular with one another are divided into a group to form a gap pair; four groups of gaps are formed in the periphery of the conductor wall to form a radiation unit; the four groups of the radiation units are arranged up and down to form a radiation array which is an antenna radiation section. Upper and lower ends of the antenna radiation structure are respectively used as dual circularly polarized two feeder ports; a coaxial tapered transmission line structure is adopted for changing the interface into a practical SMA interface dimension for performing radio frequency feeder. According to the embodiment disclosed by the invention, the omnidirectional performances and the dual circularly polarized performances are good, the working frequency band is 5.1-5.9GHZ, -15dB isolation bandwidth is 12.8%, a reflection coefficient in the isolation bandwidth is smaller than (-)10dB, omnidirectional surface gain within the band is 3dBic-dBic, and the omnidirectional average axial ratio is smaller than 3dB.
Owner:SHANGHAI JIAO TONG UNIV
Omni-directional antenna in an hourglass-shaped vase housing
ActiveUS8299976B2Good omnidirectionalHigh gainAntenna supports/mountingsRadiating elements structural formsDirectional antennaEngineering
Owner:VOXX INTERNATIONAL
Low-frequency ultra-wideband planar omnidirectional antenna
The invention discloses a low-frequency ultra-wideband planar omnidirectional antenna. The antenna includes a dielectric substrate, a metal radiation patch, a metal ground plate and a loading resistor. The dielectric substrate is made from FR-4, and has a first surface and a second surface opposite to the first surface. The metal radiation patch is arranged on the first surface of the dielectric substrate. The metal ground plate and the loading resistor are arranged on the second surface of the dielectric substrate. The metal radiation patch is formed by a U-shaped patch and a disc. The tail end of the U-shaped patch and the top end of a gradual changing microstrip feed line are connected via an inverted triangular metal patch. The metal ground plate is a rectangular frame metal patch, a trapezoid patch and two long strip patches are arranged inside the metal rectangular frame, and the same load resistance is applied to the two ends of the metal rectangular frame. Feeding of the whole antenna is carried out through a 50[omega] coaxial line. The low-frequency ultra-wideband planar omnidirectional antenna provided by the invention is compact in structure and wide in bandwidth scope, and exhibits good low frequency omnidirectional performance.
Owner:NANJING UNIV OF INFORMATION SCI & TECH
Omnidirectional dual circularly polarized antenna with same-side feeding
ActiveCN106229635AImprove efficiencyGood isolationSimultaneous aerial operationsRadiating elements structural formsRadio frequencyPhysics
The invention provides an omnidirectional dual circularly polarized antenna with same-side feeding. The antenna comprises a radiation structure, a similar coaxial impedance matching structure, and a radio frequency excitation conversion T-shaped connecting structure, the similar coaxial impedance matching structure is divided into an upper similar coaxial impedance matching structure and a lower similar coaxial impedance matching structure, the upper end and the lower end of the radiation structure are respectively connected with the lower end of the upper similar coaxial impedance matching structure and the upper end of the lower similar coaxial impedance matching structure, the upper end of the upper similar coaxial impedance matching structure is sealed by a metal disc plate, the lower end of the lower similar coaxial impedance matching structure is connected with the radio frequency excitation conversion T-shaped connecting structure, and an interface of the radio frequency excitation conversion T-shaped connecting structure can directly perform radio frequency excitation by employing an SMA joint feed line. According to the antenna, the omnidirectional performance and the axial ratio performance are good, a certain working bandwidth of -10dB bandwidth 600M (5.2GHz-5.8GHz) is achieved, and in-band gain is greater than 5.2dB and can reach 6.7dB to the maximum.
Owner:SHANGHAI JIAO TONG UNIV
Multi-rotor unmanned aerial vehicle high-gain omnidirectional conformal diversity antenna technology
PendingCN106450712AReduce manufacturing costEasy to processAntenna supports/mountingsAntenna adaptation in movable bodiesFrequency bandWireless communication systems
The present invention relates to a multi-rotor unmanned aerial vehicle high-gain omnidirectional conformal diversity antenna technology, and relates to a high-gain unmanned aerial vehicle conformal antenna. By organizing an array on the basis of the radiation arrays of the common PCB dipole forms and carrying out the fine phase feed, the series feed antennas and the parallel feed antennas of the radiation arrays are conformal successfully, have the high gain, and are easy to be conformal with an undercarriage of an unmanned aerial vehicle, thereby realizing the horizontal and vertical polarization. By the diversity of the two kinds of antennas, the conditions of an end-emission type antenna array and an edge-emission type antenna array are satisfied. The multi-rotor unmanned aerial vehicle high-gain omnidirectional conformal diversity antenna technology is especially suitable for being applied to the MIMO and OFDM wireless communication systems, and the working frequency bands can be WIFI 2.4 GHz or 5.8 GHz and ISM 433 MHz, 1.2 GHz and 900 MHz, also can be the legal frequency bands used for an unmanned aircraft system of 840.5-845 MHz and 1430-1440 MHz.
Owner:深圳市脉冲星通信科技有限公司
MIMO multiantenna communication system and performance evaluation method for communication system
ActiveCN109302252AImprove transceiver performanceImprove performanceTransmission monitoringRadio transmissionPath lengthMimo antenna
The invention discloses an MIMO multiantenna communication system. The system comprises a transmitting end and a receiving end. The transmitting end and the receiving end are equipped with uniform spherical MIMO antenna arrays. The invention also provide a performance evaluation method for the MIMO multiantenna communication system. The provided system is described through scatterer Gaussian distribution. A spatial Gaussian distribution density function expression is determined. A joint probability density function of an angle of divergence (AOD) of a single-time bounce SBM component is expressed. An edge PDF of the angle of divergence (AOD) of a single-time bounce path SBM in the system is provided through utilization of integral of the joint PDF on a path length interval component. Fourier transform is carried out on pulse response h<pq>(t) to obtain a time varying transfer function. A frequency cross-correlation function is expressed. According to the system and the method, throughimporting of the spatial autocorrelation function, and temporal and frequency cross-correlation functions between two array elements pq, performance of the MIMO multiantenna communication system is evaluated, and the performance of terminal antenna arrays and a wireless communication system is optimized.
Owner:苏州西林科电子技术有限公司
Circularly polarized antenna-based space diversity coverage receiving and transmitting system
ActiveCN106252878AImprove antenna efficiencyHigh gainRadiating elements structural formsAntennas earthing switches associationCircularly polarized antennaDiversity scheme
Owner:SHANGHAI JIAO TONG UNIV
Graphene coated inorganic filler composite resin adhesive material
InactiveCN106010403AHigh reactivityImprove adhesionNon-macromolecular adhesive additivesMacromolecular adhesive additivesChemical industryConducting pathway
The invention relates to a graphene coated inorganic filler composite resin adhesive material. The material is prepared from, by weight, 20-35 parts of resin matrix, 40-60 parts of graphene coated inorganic filler and 20-30 parts of curing agent. According to the composite resin adhesive, the composite resin matrix, the composite inorganic filler and the composite curing agent are adopted, and a heat-conducting pathway and a conductive network can be effectively formed; the product has an extremely high heat-conducting property and a certain flame-retardant property, and the heat-conducting coefficient of the finally prepared composite resin adhesive is larger than 9.0 W / mK, and the electric conductivity is larger than 37 S / m; the heat-resistant property is good, and a certain anti-corrosion capability is achieved; the graphene coated inorganic filler composite resin adhesive material can be widely applied to the fields of heat-sink devices, electronic packages, electronic equipment, chemical industry energy, automobile industry, aerospace and the like.
Owner:SICHUAN WUXIN ENERGY TECH
Omnidirectional magnetic concentrator type lamb wave electromagnetic acoustic transducer
ActiveCN110193460AImprove modal singularityGuaranteed Circular ConsistencyUltrasonic/sonic/infrasonic wave generationMechanical vibrations separationZigzag lineNeodymium iron boron
The invention discloses an omnidirectional magnetic concentrator type lamb wave electromagnetic acoustic transducer, wherein the transducer comprises a cylindrical neodymium-iron-boron magnet, a magnetic concentrator and a circular array type back-folding line ring. The multi-cluster circular zigzag line ring in a flexible circuit board is placed on the surface of an aluminum plate to be detected,and the magnetic concentrator and the neodymium-iron-boron magnet are attracted and then placed right above a return line ring. Based on lorentz force effect, the stimulating of omni-directional S0 modal guided wave in a plate structure is realized. Experiments verify that the prepared array type omnidirectional magnetic concentrator type lamb wave electromagnetic acoustic transducer can be usedfor stimulating a single S0 mode guided wave in the aluminum plate; with an omni-directional test experiment carried out, the developed omnidirectional magnetic concentrator type lamb wave electromagnetic acoustic transducer can stimulate to a S0 guide wave spread in the 360-degree direction; and a defect detection experiment verifies that the omnidirectional magnetic concentrator type lamb wave electromagnetic acoustic transducer can effectively reduce the analysis difficulties and errors of defect signals.
Owner:BEIJING UNIV OF TECH
Omnidirectional-radiation broadband circular polarization antenna
InactiveCN108539428AGood omnidirectionalThe axis of circular polarization is lower thanAntennasOmnidirectional antennaGrating
The invention discloses an omnidirectional-radiation broadband circular polarization antenna, which belongs to the technical field of wireless communication equipment. The circular polarization antenna comprises an omnidirectional antenna and a hollow cylindrical circular polarizer located outside the omnidirectional antenna, wherein the axes of the omnidirectional antenna and the hollow cylindrical circular polarizer are coincident and the distance is 0.2 lambda0 to 0.4 lambda0; the hollow cylindrical circular polarizer comprises n layers of coaxial broken line-type metal polarization gratings, each broken line-type metal polarization grating layer is formed by parallelly-arranged broken line gratings covering the side surface of a hollow dielectric cylinder, broken line grating units arerepeated periodically to form each broken line grating, the line width of the broken line grating unit is 4*10<-3> lambda0 to 0.03 lambda0, the height is 0.1 lambda0 to 0.3 lambda0, the width of a U-type part is 0.025 lambda0 to 0.1 lambda0, the gap between adjacent broken line gratings is 0.1 lambda0 to 0.5 lambda0, and the included angle between the axis of the broken line grating unit and theaxis of the hollow cylindrical circular polarizer is 45 DEG. According to the broadband circular polarization antenna provided in the invention, an antenna radiating circular polarization electromagnetic waves can be obtained in a polarization torsion mode, and the antenna is good in omnidirectional performance, low in a circular polarization axial ratio, wide in frequency band and high in gains.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Microstrip antenna and implantable medical system adopting same
PendingCN107887692ACompact structureHigh gainAntenna supports/mountingsRadiating elements structural formsEngineeringOmni directional
The invention discloses a microstrip antenna and an implantable medical system applying the same. The microstrip antenna comprises an antenna radiation unit and a PCB substrate; the antenna radiationunit is positioned on the PCB substrate; the antenna radiation unit comprises a feed point, a feed microstrip line, a short circuit point, a ground microstrip line and a radiation body; the feed pointand the short circuit point are connected with the ground microstrip line through the feed microstrip line; the radiation body is connected to the connecting position of the feed microstrip line andthe ground microstrip line; and the feed point, the feed microstrip line, the short circuit point, the ground microstrip line and the radiation body form a PIFA antenna. The implantable medical systemcomprises an in-vitro program controller, wherein the in-vitro program controller comprises the above-mentioned microstrip antenna. Compared with the prior art, the microstrip antenna and the implantable medical system applying the same have the advantages of high matching degree, low loss, compact structure, simple processing, low contractions cost, high gain, high omnidirectivity and the like.
Owner:SCENERAY
Broadband multi-frequency-range printed antenna based on double sided parallel strip line (DSPSL) feed structure
ActiveCN103474762AHigh bandwidthFew parametersSimultaneous aerial operationsRadiating elements structural formsAntenna designLaser technology
The invention discloses a broadband multi-frequency-range printed antenna based on a double sided parallel strip line (DSPSL) feed structure. The broadband multi-frequency-range printed antenna comprises a medium substrate, a first antenna radiation unit, a second antenna radiation unit, a microstrip feed line and a ground plate. The first antenna radiation unit, the second antenna radiation unit, the microstrip feed line and the ground plate are made of copper materials, and copper is applied to the surface of the medium substrate by using a laser technology or a corrosion technology. The first antenna radiation unit and the second antenna radiation unit are respectively printed on the front surface and the back surface of the medium substrate; the first antenna radiation unit and the second antenna radiation unit are overlapped in space; and a double sided parallel strip line structure is formed by a space overlapping portion. According to the invention, the double sided parallel strip line feed structure is adopted so that the bandwidth of the antenna is effectively improved; and all the branches of the antenna radiation antenna units have unified widths so that the antenna parameters are reduced and the design of the antenna is facilitated.
Owner:BEIHANG UNIV
Miniaturized ultra-wideband microstrip antenna
ActiveCN111211415ASmall sizeHigh gainSimultaneous aerial operationsRadiating elements structural formsUltra-widebandBroadband microstrip antenna
The invention relates to the technical field of antennas, and particularly relates to a miniaturized ultra-wideband microstrip antenna. The antenna comprises a substrate, and a radiation patch and a grounding part are arranged on the substrate; the radiation patch comprises a monopole and a coupling structure; the coupling structure comprises a first part and a second part; the first part and thesecond part are arranged on two sides of the substrate; the first part comprises a second sub-patch, two parallel first sub-patches and two parallel third sub-patches, and the two first sub-patches and the two parallel third sub-patches are arranged on the two sides of the second sub-patch respectively; and the second part is a U-shaped structure. A size of the ultra-wideband microstrip antenna isonly 20mm*34mm, the ultra-wideband microstrip antenna has the small size, and the ultra-wideband microstrip antenna also has advantages of an ultra-wideband, a high gain and good omnidirectivity under the condition that the size is reduced. According to the antenna, an effective working frequency band is 3.05-11.08GHz, a total bandwidth is 8GHz, an average gain is higher than 5dBi, a peak value is 8.2dBi, and an omnidirectional radiation characteristic is achieved at 3.1-6GHz.
Owner:SOUTHWEST JIAOTONG UNIV
Loudspeaker and loudspeaker system
ActiveCN106068005AGuaranteed Stereo EffectAchieve diffusionElectrical transducersSound waveEngineering
The invention discloses a loudspeaker and a loudspeaker system. First sound circulation passageways and second sound circulation passageways are respectively arranged on the two sides of an irradiator. The first sound circulation passageways extend to the edge of the irradiator from the position of the radiator that is directly facing a first sound producing unit through gradually getting away from the first sound producing unit in the X-axis direction. The second sound circulation passageways extend to the edge of the irradiator from the position of the radiator that is directly facing a second sound producing unit through gradually getting away from the second sound producing unit in the X-axis direction. According to the technical scheme of the loudspeaker, sound waves emitted from the first sound producing unit are radiated to the outside through a plurality of first sound circulation passageways on the radiator. Meanwhile, sound waves emitted from the second sound producing unit are radiated to the outside through a plurality of second sound circulation passageways on the radiator. Therefore, the 360-degree diffusion of the sound fields of the two sound producing units can be realized. Meanwhile, the omni-directional property of the sound field of a tweeter unit is improved, so that the loudspeaker can be made smaller. Moreover, the stereophonic effect of the loudspeaker can be simultaneously ensured.
Owner:LITTLE BIRD CO LTD
Low-profile broadband omnidirectional filtering antenna applied to unmanned aerial vehicle communication
ActiveCN111864395AWorking bandwidthGood omnidirectionalAntenna adaptation in movable bodiesAntenna earthingsDielectric plateUncrewed vehicle
The invention provides a low-profile broadband omnidirectional filtering antenna applied to unmanned aerial vehicle communication, which aims to broaden the working bandwidth and high-frequency out-of-band rejection bandwidth of the antenna while ensuring omnidirectional and low-profile characteristics, and comprises a first dielectric plate and a second dielectric plate which are stacked up and down, and a first circular metal patch is printed on the upper surface of the first dielectric plate; the upper surface of the second dielectric plate is printed with a third circular metal patch, a first metal circular ring composed of N first arc bottom trapezoidal patches and a second metal circular ring composed of M second arc bottom trapezoidal patches, wherein the third circular metal patchis connected with the metal floor through N1 metallized via holes which are distributed in a circular mode. A metal floor is printed on the lower surface of the second dielectric plate, and a first split-ring resonator located at the projection position of the first arc bottom trapezoidal patch and a second split-ring resonator located at the projection position of the second arc bottom trapezoidal patch are etched on the metal floor.
Owner:XIDIAN UNIV +1
Combined type UHF frequency range CB antenna
InactiveCN107482300AReduce weightBeautiful use of strengthAntenna supports/mountingsRadiating element housingsLow-gain antennaGlass fiber
The invention provides a combined type UHF frequency range CB antenna comprising a pedestal, a short antenna, and a long antenna; the pedestal is connected with the short antenna; the long antenna is detachably connected with the short antenna; the short antenna and the long antenna respectively comprise an antenna housing made of taper glass fibers; the antenna housing uses the taper glass fiber to reduce the wind resistance and antenna weight, thus ensuring the antenna usage intensity, and providing more beautiful appearance; the short antenna and the long antenna are threaded by a connector, and different connectors can be replaced so as to match with long antennas of different calibers; in addition, a screw is added for fixation enhancement, thus ensuring the long antenna not to loosen in vehicle-mounted usage; the short antenna and long antenna are installed in a separated mode; the antenna only needs to be mounted once, and can be freely switched to high or low gain antennas, thus complying with different usage conditions, and saving cost.
Owner:DONGGUAN BAIAO ELECTRONICS TECH CO LTD
Loudspeaker and loudspeaker system
ActiveCN106101938AGood omnidirectionalPromote circulationLoudspeaker spatial/constructional arrangementsEngineeringAcoustic wave
The invention discloses a loudspeaker. The loudspeaker comprises a radiator and a sounding unit which is fixed to one side of the radiator, wherein one side, which is close to the sounding unit, of the radiator is provided with a plurality of concave first sound circulation channels through which sound waves of the sounding unit flow; and the first sound circulation channels extend from a position, which is opposite to the sounding unit, on the radiator to an edge of the radiator in a way of gradually getting far away from the sounding unit along an X-axis direction. According to the loudspeaker, sound waves emitted by the sounding unit are radiated out through the plurality of first sound circulation channels on the radiator, so that 360-degree diffusion of a sound field of the sounding unit is realized; a sound field of a high-pitch unit is improved to be omni-directional; and the loudspeaker can be made smaller. Moreover, through adoption of the loudspeaker, sound can be circulated better in the sound circulation channels, and the problem of emission or diffraction is solved, so that other noise is not introduced in the finally-radiated sound.
Owner:LITTLE BIRD CO LTD
Smart TV antenna and smart TV
ActiveCN109742507AEnhanced vertical polarization characteristicsImproved vertical polarization characteristicsAntenna supports/mountingsRadiating elements structural formsEngineeringData transmission
The invention provides a smart TV antenna and a smart TV. The smart TV antenna is disposed in the TV, the smart TV antenna comprises: a printed circuit board, wherein the printed circuit board comprises a first surface and a second surface, which are opposite to each other; a grounding metal layer, wherein the grounding metal layer is disposed on the first surface; at least two radiation regions,wherein the at least two radiation regions are disposed on the second surface; and a metal loading layer, wherein the metal loading layer is disposed on the second surface and is located between the radiation regions, the metal loading layer is electrically connected with the grounding metal layer through a through hole passing through the printed circuit board, and the radiation regions are electrically connected with the metal loading layer to enhance the vertical polarization characteristics of the radiation regions. The smart TV antenna provided by the invention enhances the vertical polarization characteristic, which is beneficial to improving the data transmission throughput rate and the omnidirectionality, and reducing the dead zones of wireless signals of the TV.
Owner:SHENZHEN TCL NEW-TECH CO LTD
Single-chip rectangular omnidirectional antenna
ActiveCN105406175AHigh gainGood omnidirectionalRadiating elements structural formsAntennas earthing switches associationOmnidirectional antennaPhysics
The invention discloses a single-chip rectangular omnidirectional antenna. The single-chip rectangular omnidirectional antenna comprises a rectangular substrate, a U-shaped metal grounding sheet, multiple rectangular radiation sheets, a bending line metal radiation structure and a groove structure. The single-chip rectangular omnidirectional antenna aims at solving the problems that conventional omnidirectional antennas are low in gain, expensive in plate material and poor in omnidirectional performance. The single-chip rectangular omnidirectional antenna comprises the substrate 21, the U-shaped metal grounding sheet formed by the rectangular metal sheet 1, the rectangular metal sheet 2 and the rectangular metal sheet 14, the rectangular metal sheet 15, the rectangular metal sheet 3, the bending line metal radiation structure formed by the rectangular metal sheet 4, the rectangular metal sheet 5, the rectangular metal sheet 16, the rectangular metal sheet 17, the rectangular metal sheet 6, the rectangular metal sheet 7, the rectangular metal sheet 18, the rectangular metal sheet 19, the rectangular metal sheet 8, the rectangular metal sheet 9 and the rectangular metal sheet 20, and the groove structure formed by the rectangular metal sheet 10, the rectangular metal sheet 11, the rectangular metal sheet 12 and the rectangular metal sheet 13. The single-chip rectangular omnidirectional antenna is used for indoor and outdoor wireless coverage occasions.
Owner:陕西尚品信息科技有限公司
UHF plane inverted-F and monopole combined antenna applied to RFID reader-writer
InactiveCN103956580AChanging far-field radiation characteristicsKeep high gainRadiating elements structural formsResonant antennasDielectric plateSoftware engineering
Owner:EAST CHINA JIAOTONG UNIVERSITY
Compact broadband omnidirectional vertically polarized antenna
ActiveCN109786931AEasy to tuneClear physical mechanismSimultaneous aerial operationsAntenna supports/mountingsResonanceDielectric plate
The present invention discloses a compact broadband omnidirectional vertically polarized antenna. The antenna comprises a top-layer metal radiating sheet, a lower-layer dielectric plate, a middle metal column and a plurality of shorting-circuit metal columns. The lower-layer dielectric plate is provided with a hollow region. An upper end of the middle metal column is connected with the top-layer metal radiating sheet. A lower end of the middle metal column extends towards the hollow region. Upper ends of the shorting-circuit metal columns are connected with the top-layer metal radiating sheet.Lower ends of the shorting-circuit metal columns are connected with an upper surface of the lower-layer dielectric plate. After a microstrip feeder penetrates through the hollow region of the lower-layer dielectric plate, the microstrip feeder is connected with the lower end of the middle metal column. The present application proposes a method for introducing a capacitive reactance load into a floor slit, so that an antenna obtains a new resonant mode, and forms double-resonance operation in combination with a resonant mode obtained by introducing an inductive reactance load into a short-circuit metal bar, so that the antenna obtains good omnidirectional vertically polarized radiation characteristics within a wide range.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Data transmission system and data transmission method for underwater acoustic network
InactiveCN101567728BIncrease success rateImprove throughputFree-space transmissionData switching networksDigital signal processingTelecommunications link
The invention relates to a data transmission system for an underwater acoustic network, which comprises a plurality of independent underwater nodes, wherein each underwater node is equivalently connected with at least the other underwater node. The data transmission system also comprises a transmitting optical antenna, a receiving optical antenna, a light source, an optical modulator, an optical receiver, an underwater acoustic transducer / receiving transducer, a digital signal processor and a positioning module, wherein the positioning module is provided with a rotating device and used for completing the alignment between the light source and the optical receiver; the transmitting optical antenna, the light source, the optical modulator and the digital signal processor are in signal connection with each other in turn; the receiving optical antenna, the optical receiver and the digital signal processor are in signal connection with each other in turn; the digital signal processor is also in signal connection with the positioning module and the underwater acoustic transducer / receiving transducer respectively; and the light source is a blue-green laser source. The invention also relates to a data transmission method for the underwater acoustic network. The invention reduces the collision probability of data in the transmission process, improves the success rate of the constructionof a communication link, saves the network bandwidth, and improves the network throughout.
Owner:SOUTH CHINA UNIV OF TECH
Button-type RFID tag
InactiveCN104915709AGood omnidirectionalPortable and convenientAntenna supports/mountingsRecord carriers used with machinesEngineeringDipole antenna
The invention discloses a novel button-type RFID tag in a three-dimensional structure. The button-type RFID tag comprises a button-type ABS substrate, a bending dipole antenna and a coupling feeding ring. The ABS substrate adopts a 3D printing three-dimensional button structure and comprises a circular top surface, a circular bottom surface and a transitional side wall; the dipole antenna is a combination of a straight line and sector structures on the bottom surface of the substrate, wherein the straight line structure passes through the circle center of the bottom surface and connects the two centrally-symmetrical sector structures in series; one end, away from the straight line, of each sector structure extends to the top surface of the substrate through the transitional side wall; the dipole antenna is also a centrally-symmetrical sector structure on the top surface of the substrate; and the coupling feeding ring is arranged beside the straight line structure of the dipole antenna arranged on the bottom surface of the substrate, and is loaded with an Alien Higgs 4 RFID chip. The button-type RFID tag not only overcomes the plane dimension limitation of a conventional RFID, but also has the advantages of small size, good omnidirectivity, simple structure, low cost, convenient application and wide application range and the like.
Owner:ZHEJIANG UNIV
Omnidirectional radiation oscillator array antenna for coupling feed
ActiveCN102760946AWorking bandwidthCompact structureAntenna arraysRadiating elements structural formsElectricityOmnidirectional antenna
An omnidirectional radiation oscillator array antenna for coupling feed relates to a printing antenna and resolves the problem that the existing omnidirectional antenna is narrow in bandwidth, low in gain, poor in omnidirectional performance in working band and larger in size. The antenna comprises a media plate and a coplanar waveguide center feeder. The antenna further comprises a feed port matching branch knot, radiation type terminal load and two groups of oscillators. The coplanar waveguide center feeder, the feed port matching branch knot, the radiation type terminal load and the two groups of oscillators are printed on the front plate face of the media plate, the lower end of the coplanar waveguide center feeder is connected with the feed port matching branch knot, and the upper end of the coplanar waveguide center feeder is connected with the radiation type terminal load. Each group of vibrators comprise a first vibrator and a second vibrator which are rectangular, the two groups of vibrators are symmetrically arranged along the coplanar waveguide center feeder, and a first horizontal feeder and a second horizontal feeder are printed on the back plate face of the media plate. The antenna is used for the technical field of radio engineering.
Owner:HARBIN INST OF TECH
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