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237 results about "Ku band" patented technology
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The Kᵤ band (/ˌkeɪˈjuː/) is the portion of the electromagnetic spectrum in the microwave range of frequencies from 12 to 18 gigahertz (GHz). The symbol is short for "K-under" (originally German: Kurz-unten), because it is the lower part of the original NATO K band, which was split into three bands (Kᵤ, K, and Kₐ) because of the presence of the atmospheric water vapor resonance peak at 22.24 GHz, (1.35 cm) which made the center unusable for long range transmission. In radar applications, it ranges from 12 to 18 GHz according to the formal definition of radar frequency band nomenclature in IEEE Standard 521-2002.
Transmission/reception sources of electromagnetic waves for multireflector antenna
InactiveUS6861998B2Reduce sidelobeReducing side lobe level SLLLogperiodic antennasSimultaneous aerial operationsElectromagnetic wave transmissionWaveguide
The present invention relates to an electromagnetic wave transmission / reception source for a multireflector antenna of the Cassegrain type comprising longitudinal-radiation means operating in a first frequency band and an array of n radiating elements of the travelling-wave type operating in a second frequency band with the n radiating elements arranged symmetrically around the longitudinal-radiation means, the array and the longitudinal-radiation means having an approximately common phase centre, the array of n radiating elements being excited by a waveguide of polygonal cross section. The invention applies especially in satellite communication systems operating in the C-, Ku- or Ka-bands.
Owner:THOMSON LICENSING SA
Aeronautical broadcast and communication system
ActiveUS20060040612A1Relatively large bandwidthMore bandwidthActive radio relay systemsWireless commuication servicesJet aeroplaneAviation
A method and system for a plurality of airplanes in flight to receive from and send to a plurality of ground stations broadcast and communication signals through a single or a plurality of geostationary satellites, wherein at least the mobile link between said airplanes and said satellite, uplink or downlink, uses the high frequency radio waves at 17 GHz or higher, such as Ka-band. The fixed link between said satellite and said ground stations may use any radio frequencies below the frequencies used to communicate between the satellite and the aircraft. The lower frequencies tend to be less susceptible to rain attenuation and hence suitable for closing the fixed broadcast and communication link. Frequencies such as C-band or Ku-band, or even Ka-band, are applied between satellite and ground such that the available link margin is sufficient to overcome rain attenuation at said ground stations. Said satellite carries a plurality of transponders that may include a plurality of frequency converters to enable the conversion between different frequencies. Said satellite generates a plurality of spot beams, shaped or unshaped, which collectively cover the flight routes of said airplanes, preferably the geodesic path between two highly populated regions.
Owner:NUBRON
Low profile hybrid phased array antenna system configuration and element
InactiveUS20050243005A1Simultaneous aerial operationsRadiating elements structural formsMicrostrip patch antennaSystem configuration
A microstrip patch antenna is provided having a high gain performance with a smaller size compared to existing approaches. The antenna includes a patch having a polygon shape, such as a convex polygon, and a modified V-slot in the polygon patch including high-frequency control segments. Such an antenna has a dual band performance, such as in the Ka and Ku bands. An array of antenna elements is also described, as well as an ultra low profile phased array antenna system.
Owner:INTELWAVES TECH
Multi-Band Antenna System for Satellite Communications
The present invention provides an improved antenna system on moving platform that is in communication with multiple satellites for simultaneous reception and transmission of RF energy at multiple frequencies. The antenna is implemented as a multi-beam, multi-band antenna having a main reflector with multiple feed horns and a sub-reflector having a reflective surface defining an image focus for a Ka band frequency signal and a prime focus for a Ku band frequency signal.
Owner:KVH IND INC
Aeronautical broadcast and communication system
ActiveUS7505736B2Relatively large bandwidthMore bandwidthActive radio relay systemsBroadcast transmission systemsAviationJet aeroplane
A method and system for a plurality of airplanes in flight to receive from and send to a plurality of ground stations broadcast and communication signals through a single or a plurality of geostationary satellites, wherein at least the mobile link between said airplanes and said satellite, uplink or downlink, uses the high frequency radio waves at 17 GHz or higher, such as Ka-band. The fixed link between said satellite and said ground stations may use any radio frequencies below the frequencies used to communicate between the satellite and the aircraft. The lower frequencies tend to be less susceptible to rain attenuation and hence suitable for closing the fixed broadcast and communication link. Frequencies such as C-band or Ku-band, or even Ka-band, are applied between satellite and ground such that the available link margin is sufficient to overcome rain attenuation at said ground stations. Said satellite carries a plurality of transponders that may include a plurality of frequency converters to enable the conversion between different frequencies. Said satellite generates a plurality of spot beams, shaped or unshaped, which collectively cover the flight routes of said airplanes, preferably the geodesic path between two highly populated regions.
Owner:NUBRON
Method for limiting interference between satellite communications systems
InactiveUS6866231B2Minimize the numberLow costArtificial satellitesRadio transmissionCommunications systemGround station
Boeing achieves satellite diversity by having a large discrimination angle for a MEO constellation of communications satellites to limit interference in the Ku-band with GSO communications systems. Each satellite entering an exclusion zone over a GSO ground station terminates all transmissions to provide EPFD within acceptable limits. The Boeing MEO constellation preferably comprises 20 satellites, 5 in each orbit. The four orbits are inclined at about 57° with respect to the equator. Services include an Integrated Digital Service (IDS) and Backhaul Data Service (BDS) to accommodate the needs of different users.
Owner:THE BOEING CO
Single ku-band multi-polarization gallium arsenide transmit chip
InactiveUS7009562B2ThinnerLow costSimultaneous aerial operationsRadiating elements structural formsActive phaseEngineering
The present invention is a wide band GaAs microwave monolithic integrated circuit (MMIC) transmit chip that is capable of transmitting linearly or circularly polarized signals when connected to a pair of orthogonal cross-polarized antennas. In an active phased-array antenna environment, this transmit chip is capable of transmitting signals with different scan angles. This invention also contains a digital serial to parallel converter that uses TTL signal to control the phase shifter and attenuator circuits that are required for controlling the polarization and scan angle of the transmitted signal.
Owner:HARRIS CORP
Ku-band low-profile dual-frequency dual-polarization array antenna
InactiveCN102280718ALow profileImprovement of oral surface utilization efficiencyRadiating elements structural formsPolarised antenna unit combinationsKu bandGround plate
A Ku-band low-profile dual-frequency dual-polarization array antenna in the field of satellite communication technology, a multi-layer sandwich structure composed of eight layers, followed by a parasitic unit layer, a first dielectric plate layer, an air layer, an excitation unit and a first The polarized feeding matching network layer, the second dielectric board layer, the grounding board layer, the third dielectric board layer and the second polarized feeding matching network layer. The invention can meet the impedance broadband requirement of the receiving and receiving frequency band of the current Ku-band satellite communication, and the isolation degree of the horizontal polarization and the vertical polarization port is better than 30dB.
Owner:SHANGHAI JIAO TONG UNIV +1
Technique for adaptive data rate communication over fading dispersive channels
ActiveUS7751372B2Improve data throughputImprove transmission conditionsFrequency-division multiplex detailsTransmission systemsPacket arrivalDigital data
In a duplex radio link digital data information is transmitted to a remote terminal at a constant symbol rate in accordance with a selected data rate mode that is a function of direct sequence spreading gain, error correction code rate, and signal constellation type. The data rate is adapted by selecting a data rate mode that is a function of a data packet arrival rate and a link quality measure fed back from the remote terminal. The data packet arrival rate is controlled as a function of the link quality measure and the current data packet arrival rate. In systems with multiple transmit diversity channels, independent data is sent over each of the transmit diversity channels. In an idealized feedback communication example, a single antenna troposcatter system in a Ku-band application is shown to have 15.5 times the data rate capability of a conventional two-antenna system at S-band.
Owner:MONSEN PETER
Broadband communication satellite
InactiveUS7024158B2Television system detailsAntenna adaptation in movable bodiesEngineeringTransmitter antenna
A satellite system is provided that includes a receive antenna system to receive one of C-band and / or Ku-band signals and a transmit antenna system to transmit one of C-band and / or Ku-band signals. A payload section may be coupled between the receive antenna system and the transmit antenna system. The satellite system may provide broadband communications at C-band and / or Ku-band.
Owner:NORTHROP GRUMMAN SYST CORP
Four-band multi-polarization co-aperture feed source
ActiveCN102938497AImprove compactnessReduce volumeWaveguide hornsRadiating elements structural formsCircularly polarized antennaResonance
The invention relates to a four-band multi-polarization co-aperture feed source. The four-band multi-polarization co-aperture feed source is formed by combining a double linear polarization antenna of a Ku band and a double circular polarization antenna of a Ka band and comprises a conical horn, a Ku circular waveguide, a tuning screw, a Ku flange, a horizontal polarization power divider, a first flange, a vertical polarization power divider, a medium rod, a circular waveguide feed window, a stop screw, a transition section and a double circular polarization antenna. The antenna of the Ku band uses four ports for symmetrical feeding to improve the symmetrical characteristic of a directional diagram, a transmission waveguide of an electromagnetic field of the Ku band is used as the transition section of the electromagnetic field of the Ka band, and the resonance medium rod is embedded into the waveguide of the Ku band for transmitting electromagnetic waves of the Ka band so that compactness of the antenna is greatly improved. By means of dielectric waveguides and conical horn nesting technologies, the purposes of achieving antenna beam conformity and sharing one phase center are achieved, uniformities of directional diagrams and uniformities of the phase centers in four working bands are guaranteed, isolation among bands is increased, and the compactness of the antenna is improved.
Owner:BEIJING RES INST OF TELEMETRY +1
Ku band transmit-receive co-caliber multi-layer printed antenna
ActiveCN104037497ACompact structureReduce volumeAntenna arraysRadiating elements structural formsElectricityPatch array
The invention discloses a Ku band transmit-receive co-caliber multi-layer printed antenna which is characterized by including, from top to bottom, a radiation patch array and emission feed network layer provided with a radiation patch array and an emission feed network, a first dielectric layer, a metal formation, a second dielectric layer, a receiving feed network layer provided with a receiving feed network, a third dielectric layer, a meta ground connection support layer, a fourth dielectric layer, and an amplifying circuit layer provided with a receiving amplifying circuit and an emitting amplifying circuit; the emitting amplifying circuit is connected with the emission feed network, and the receiving amplifying circuit is connected with the receiving feed network. The Ku band transmit-receive co-caliber multi-layer printed antenna has the advantages of compact microstrip antenna structure, small volume, light weight, and the like, a low noise amplifier and power amplifier are integrated in the back side of the antenna, feeder loss between the low noise amplifier and power amplifier and the antenna is reduced, and the complete machine quality factor and efficiency can be improved. At the same time, the whole circuit structure adopts a multilayer printing technology, and is simple in process and low in cost.
Owner:HUADONG PHOTOELECTRIC TECHN INST OF ANHUI PROVINCE
Single-passband bilateral wave-absorbing composite metamaterial and radome and antenna system including same
ActiveCN104993249AGood radiation characteristicsReduced Radar Cross SectionRadiating element housingsDielectric substrateConductive materials
The invention belongs to the technical field of materials and radomes, and specifically relates to a single-passband bilateral wave-absorbing composite metamaterial and a radome and an antenna system including the same. The single-passband bilateral wave-absorbing composite metamaterial comprises a dielectric substrate (100) made of a non-conductive material and four periodic metamaterial structure layers embedded into the dielectric substrate. The four periodic metamaterial structure layers are respectively a resistive film layer (102), a first metal patch layer (103), a second metal patch layer (104) and a third metal patch layer (105) in sequence from top to bottom. The metal patch layers for realizing frequency selection enable an array antenna to keep good radiation characteristic and communicate freely in an X band; and meanwhile, in the S band, Ku band and K band at the two sides of the passband of the X band, the resistive film layer with wave absorption characteristic and the metal patch layers in the composite metamaterial radome work together, and electromagnetic wave which is incident on the radome and then reflected back by the metal patch layers is well absorbed.
Owner:NAT UNIV OF DEFENSE TECH
Dumbbell-shaped slot coupling excitation-based wideband low-profile microstrip antenna
ActiveCN106887690AGood broadband performanceLarge room for bandwidth improvementSoldered/welded conductive connectionsElectrically conductive adhesive connectionsBand shapeEngineering
The present invention relates to a dumbbell-shaped slot coupling excitation-based wideband low-profile microstrip antenna. The dumbbell-shaped slot coupling excitation-based wideband low-profile microstrip antenna comprises a rectangular radiation patch, a metallized isolation via hole array, an inner-layer metal ground board, a dumbbell-shaped coupling slot, a strip line feeder, a quasi-coaxial vertical interconnection structure, a microstrip feeder, an annular opening pad and an SMP connector for feeding. The antenna is constructed by using a laminated PCB technology; a three-dimensional transmission structure is constructed through a microstrip-quasi-coaxial metallized via hole-strip line structure; and the rectangular radiation patch is excited based on the special dumbbell-shaped coupling slot. The antenna has the advantages of compact structure, small horizontal dimension, low profile, low cost, easiness in processing, easiness in integration and the like, and can meet the use requirements of 12 GHz-to-18 GHz Ku bands and is very suitable for being applied to a Ku- band wideband phased array system.
Owner:CNGC INST NO 206 OF CHINA ARMS IND GRP
Broad-band high-gain scannable panel antenna of parabolic reflection surface feeding
InactiveCN105655720AWith broadband characteristicsSame radiationRadiating elements structural formsAntennas earthing switches associationParallel plateBeam scanning
The invention relates to a broad-band high-gain scannable panel antenna of parabolic reflection surface feeding. A radiation unit is a step-type variable inclination continuous transverse stub groove (VICTS). A feeding network comprises a series connection feeding structure and a parabolic reflection surface feeding network. An electromagnetic wave is reflected into a plane wave through the parabolic reflection surface type feeding network, is coupled to an upper-layer series connection feeding network and finally is radiated to a free space through the VICTS. Through relative rotation between upper and lower layers of a parallel plate waveguide, wave beam scanning is realized. The antenna of the invention covers a satellite communication ku wave band, an antenna work frequency is 10.2GHz-14.8GHz and an impedance bandwidth reaches 36.8%. At a 13GHz frequency point, a 25.7dBi gain is possessed. A antenna scanning angle scope is from 0 DEG to 56 DEG. Compared to a traditional communication in moving system antenna, by using the antenna of the invention, the feeding is simple; wave beam scanning is easy to realize; a dynamic response is fast and is in a panel shape; and a large engineering application prospect is possessed.
Owner:SHANGHAI UNIV
Triple-band offset hybrid antenna using shaped reflector
InactiveUS20050140563A1Reducing a blocking lossImprove efficiencyAntenna arraysSimultaneous aerial operationsSignal onRadio frequency signal
A triple-band offset hybrid antenna having a shaped reflector is disclosed. The triple-band offset hybrid antenna includes: a shaped reflector reflecting a K / Ku bands RF signals received from a satellite to focus an energy of the K / Ku band RF signals on a focal line and reflecting a Ka band RF transmitting signal; and a triple-band active phased feed array receiving the reflected K / Ku bands RF signals from the shaped reflector and radiating the Ka band RF transmitting signal to the shaped reflector, wherein the triple-active feed array including Ka / K bands feed array for transceiving Ka / K bands RF signal and a Ku band feed array for receiving a Ku band RF signal.
Owner:ELECTRONICS & TELECOMM RES INST
Low section compact dual-band dual-polarization common aperture microstrip antenna
InactiveCN103606745AMature processing technologyEnsure consistencyAntenna earthingsPolarised antenna unit combinationsGround plateKu band
The invention provides a low section compact dual-band dual-polarization common aperture microstrip antenna which is formed by two layers of double-face copper clad microwave dielectric plates. The needed double-frequency antenna array and Ku band antenna feed network are formed on the upper surface of the upper layer dielectric plate through etching process, and an L type coupling slot is arranged on a grounded plate at the lower surface of the upper layer dielectric plate. A Ka band antenna feed network is at the lower layer of the lower layer dielectric plate, and the antenna is subjected to coupled feeding through the slot. Two frequencies of the antenna coverage are a Ka band and a Ku band. According to the antenna, through the reasonable array layout, a Ka band antenna and a Ku band antenna are in coplanar nested placement in a same aperture, the structure is compact, the feed network of the antenna is hierarchically designed, and the wiring space is relatively abundant. The antenna can be applied to a satellite communication terminal of Ku and Ka bands.
Owner:SPACE STAR TECH CO LTD
Cyclical obstruction communication system
ActiveUS20100322150A1Radio transmissionError prevention/detection by transmission repeatCommunications systemLow jitter
Techniques for enabling broadband data rates at mobile terminals in a beyond-line-of-sight communication system are disclosed. Forward link time-diversity transmission methods and a time-diversity transmitter based upon blockage characteristics are provided. The transmitter optionally supports selective time-diversity and can operate at Ku-band or higher frequencies. A forward link time-diversity receiver and methods for receiving a forward link time-diversity signal are also disclosed. The forward link time-diversity receiver optionally provides low-jitter or low-delay characteristics. A return link transmitter and return link transmit methods which avoid blockages are also disclosed. The return link transmitter can include a signal presence detector and blockage prediction filter.
Owner:VIASAT INC
Feed network of broadband array antenna
InactiveCN101246997AHigh gainAntenna arraysRadiating elements structural formsCoaxial lineEngineering
The present invention provides a feed network of wideband array antenna which is used for wireless communication field. The present invention comprises of microstrip antenna radiation cell, radiation antenna medium substrate, microstrip mirrored unit, coaxial line feed cell, grounding board, feed network medium substrate, microstrip feed network and feed port from top to down in turn. Feed port is connected with microstrip, grounding board and feed network are set on upper surface and lower surface of feed network medium substrate, microstrip feed network is separated with radiation antenna medium substrate by grounding board and air microstrip, microstrip antenna radiation cell, microstrip mirrored unit and microstrip feed network are connected by coaxial line feed cell. The present invention can work efficiently on ku wave band (11.75-12.75GHz), and the array antenna has merits of high plus, low sidelobe and steady structure.
Owner:SHANGHAI JIAO TONG UNIV +1
SiC@SiO2@ferrite high-temperature wave-absorbing composite material and preparation method thereof
The invention relates to a high-temperature wave-absorbing composite material and a preparation method thereof and provides a SiC@SiO2@ferrite high-temperature wave-absorbing composite material and apreparation method thereof. The objective of the invention is to overcome the technical problems of complex preparation technologies, narrow wave-absorbing ranges and no shielding effect of conventional wave-absorbing material preparation methods. The wave-absorbing composite material uses SiC as a core; a SiO2 layer coats the core; and ferrite particles are adhered onto the SiO2 layer. The preparation method comprises the following steps: 1, pretreating the surface of silicon carbide; 2, synthesizing silica-coated silicon carbide SiC@SiO2; 3, after sensitization and activation of SiC@SiO2, reacting the SiC@SiO2 with a salt for preparing ferrite and a strong reducing agent in alkaline liquor, then carrying out calcination so as to obtain the SiC@SiO2@ferrite high-temperature wave-absorbingcomposite material. The material of the invention has a reflection loss of less than -5dB in a 8-to-12-GHz band and a Ku band and a maximum reflection loss of -14 dB, and can be used in the field ofwave-absorbing materials.
Owner:HARBIN INST OF TECH
A ku-band high-power low-pim broadband polarization frequency duplex feed component
ActiveCN102299425ASolve Polarization MultiplexingResolution frequencyWaveguide hornsBroadbandEngineering
Owner:XIAN INSTITUE OF SPACE RADIO TECH
Satellite communication frequency conversion terminal equipment of Ku band
ActiveCN105356928AAchieve consistencySolve power problemsRadio transmissionHigh level techniquesIntermediate frequencyTerminal equipment
The invention discloses a satellite communication frequency conversion terminal equipment of a Ku band. The satellite communication frequency conversion terminal equipment of the Ku band comprises a frequency conversion processing module used for converting a received intermediate frequency signal of an L band into a radio-frequency signal of a Ku band; a power amplification module, which comprises a preceding stage drive unit, a secondary driving unit and a last stage synthesis unit that are orderly connected, wherein the power amplification module is used for performing power amplification on the radio-frequency signal of the Ku band outputted by the frequency conversion processing module, and realizing the high power output of the radio-frequency signal of the Ku band; and a monitoring and control module used for detecting the output power of the power amplification module, and controlling a variable attenuator in the preceding stage drive unit of the power amplification module according to a comparison result with the scheduled output power, so that the output power of the power amplification module can be locked. According to the satellite communication frequency conversion terminal equipment of the Ku band provided by the invention, by setting the multistage cascaded power amplification unit, the technical problems of high-power synthesis and efficient heat dissipation can be solved, and the design of consistent and balanced amplitude and phase can be realized.
Owner:SICHUAN JIUZHOU ELECTRIC GROUP
Electronically-steered ku-band phased array antenna comprising an integrated photonic beamformer
ActiveUS20130194134A1Avoids some of cost and drawbackReduce in quantityAntenna arrays manufactureSingle stagePhotonics
A phased-array antenna that includes a photonic beamformer is disclosed. In some embodiments, a front stage of electrical-domain processing applies a 16-to-1 signal-combination ratio, a single stage of photonic beamforming applies a 4-to-1 signal-combination ratio, and a passive, electrical-domain, signal combiner applies a 32-to-1 signal-combination ratio.
Owner:UNIVSERSITEIT TWENTE
Angular diversity antenna system and feed assembly for same
ActiveUS20080062056A1Easy to deployCost effectiveWaveguide type devicesLeaky-waveguide antennasCommunications systemEngineering
A feed assembly (26) for an antenna system (38) includes a first feed element (30) that propagates a first beam (32) and a second feed element (34) that propagates a second beam (36). The second feed element (34) is collocated with, but displaced vertically from, the first feed element (30) to achieve angular diversity in elevation. Each of the feed elements (30, 34) has an elongated conical shape and is formed from a dielectric material. The feed assembly (26) operates within the Ku-band frequency range to yield high gain, collimated, independent first and second beams (32, 34). The feed assembly (26) can be implemented in a tropospheric scatter communication system (38) in conjunction with a reflector (22) to provide concurrent transmit and receive capability via the two independent, angularly separated first and second beams (32, 36).
Owner:CPI SATCOM & ANTENNA TECH INC
X-and-Ku-waveband power-adjustable microwave source
ActiveCN105529234ALarge adjustment rangeAchieve outputTransit-tube circuit elementsTransit-tube coupling devicesElectrical conductorMicrowave
The invention provides an X-and-Ku-waveband power-adjustable microwave source. The device work mode can be changed through regulating the length of an inner conductor, and the X-and-Ku-waveband crossing conversion of the work frequency can be realized.
Owner:NAT UNIV OF DEFENSE TECH
Ku/Ka dual-band transmitting-receiving community antenna feed source assembly
ActiveCN105896088AReal-time polarization adjustmentCompact structureWaveguide hornsSimultaneous aerial operationsFull waveDual mode
The invention discloses a Ku / Ka dual-band transmitting-receiving community antenna feed source assembly, which comprises a Ku / Ka waveband antenna feed assembly and a polarization adjusting mechanism, wherein the Ku / Ka waveband antenna feed assembly comprises a Ku waveband transmitting and receiving assembly and a Ka waveband transmitting and receiving assembly; and the polarization adjusting mechanism comprises a driving motor assembly, a transmission gear, a Ka rotation joint, a Ku transmission rotation joint and a Ku receiving rotation joint, and the driving motor assembly drives the Ka rotation joint, the Ku transmission rotation joint and the Ku receiving rotation joint to adjust a polarization angle through transmission of the transmission gear. The Ku / Ka dual modes share one feed source horn, a dielectric rod is cancelled, a full-waveguide mode is adopted, the structure is compact, the utilization rate is high, Ka circular polarization switching is facilitated, good Ku / Ka wave frequency band isolation is provided, and good polarization separation, polarization isolation, radiation features, a standing-wave ratio and gains are realized in the frequency band; and Ku line polarization adjustment can be carried out in real time, and automatic satellite aiming is realized.
Owner:HUNAN AEROSPACE HUNAYU COMM TECH CO LTD
Low-differential-loss low-phase-shift high-integration-level five-level marching type ultra-wide-band numerical control attenuator
ActiveCN103441747AOvercoming the problem of occupying a large chip areaReduce chip areaDigital technique networkNumerical controlEngineering
A low-differential-loss low-phase-shift high-integration-level five-level marching type ultra-wide-band numerical control attenuator is formed by a single signal channel which comprises a transmission line TL0, an 8dB attenuation module of a pai-type structure, an inductor L1, a 0-7dB combined attenuation module of a T type-bridge T type combined structure, an inductor L2, a 16dB attenuation module of a pai-type structure and a transmission TL1 in a cascaded mode in sequence based on the RF CMOS technology. An MOS tube is used as a control switch, five independent control ends controls three attenuation modules to work, an inducting network is used for phase compensation, working frequency range is Ku wave band within the attenuation range of 0-31 dB with marching length of 1dB, and 32-state low-differential-loss low-phase-shift signal amplitude attenuation can be achieved. The attenuator has the advantages of being low in differential loss, low in additional phase shift, low in production cost, small in chip area and compatible with a digital processing module, and the attenuator can be used for single-chip ultra-wide-band communication system integration.
Owner:XIDIAN UNIV
Light and small type permanent magnetic packaging Ku waveband coaxial transition device
ActiveCN108470667AEfficient emissionsGuaranteed normal transmissionTransit-tube cathodesReflex klystronsElectrical conductorElectromagnetic field
The invention relates to a light and small type permanent magnetic packaging Ku waveband coaxial transition device. The cathode A of a focusing cathode E is loaded; explosion electronic emission occurs under the condition of externally added high voltage; after electronic beams pass cascading double resonance reflection cavities, initial speed pre-modulation is acquired; speed modulation is completely converted into density modulation; high-frequency electric fields in the cavities are extracted and sufficient interactions occur between the high-frequency electric fields and clustering electronics transmitted therein; generated Ku waveband HPM is externally coupled and output through coaxial output waves; and finally, coaxial grooves in an inner conductor B absorb electronic beams of restenergy. The intensity of the generated electric fields is 0.3T, the weight of the permanent magnet is 63.5kg; and under the guidance magnetic field, effective emission and transmission of the electronic beams are achieved. By introducing the cascading double resonance reflection cavities, coupling of the electromagnetic fields in the modulation cavities to diode regions is reduced, radial fluctuation of the electronic beams is reduced and the required guidance magnetic field is reduced. The working mode of the device is TM02, so the novel device is allowed to have quite high power cavity in the Ku waveband.
Owner:NAT UNIV OF DEFENSE TECH
Low profile hybrid phased array antenna system configuration and element
InactiveUS7161537B2Simultaneous aerial operationsRadiating elements structural formsMicrostrip patch antennaSystem configuration
A microstrip patch antenna is provided having a high gain performance with a smaller size compared to existing approaches. The antenna includes a patch having a polygon shape, such as a convex polygon, and a modified V-slot in the polygon patch including high-frequency control segments. Such an antenna has a dual band performance, such as in the Ka and Ku bands. An array of antenna elements is also described, as well as an ultra low profile phased array antenna system.
Owner:INTELWAVES TECH
Tri-band measurement and control remote sensing satellite communication multi-functional composite feed source
ActiveCN109728445AEnsure consistencyLow cross polarizationWaveguide hornsSimultaneous aerial operationsNetwork connectionCoupling
The invention discloses a tri-band measurement and control remote sensing satellite communication multi-functional composite feed source. S-band folding arm oscillator illuminators are installed at the outermost side of a common-caliber corrugated horn through the X / Ku ring loading and the differential mode compatible loading; the S-band folding arm oscillator illuminators are connected with an S-band sum-difference network to form S-band sum-difference signals; common-caliber corrugated horn through the X / Ku ring loading and the differential mode compatible loading is connected with an X / Ku six-port wave separator; Ku-band signals are directly connected backwards for output to connect with a Ku-band orthogonal mode coupler to output orthogonal Ku signals of two paths of vertical polarization and horizontal polarization; X-band signals are subjected to equal-amplitude and in-phase coupling through fourth coupling ports of the X / Ku six-port wave separator to connect with four coupling input ports of an X-band five-end synthesizer, and the output port is connected with the input port of an X-band separator circular polarizer.
Owner:BEIJING RES INST OF TELEMETRY +1
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