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32 results about "Phased array feed" patented technology
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The Phased Array Feeds (PAF) element, part of the SKA Advanced Instrumentation Programme, includes the activities necessary to develop a wideband, multi-pixel, wide field-of-view receiver for the SKA.
Dual frequency band dual polarization spaceborne cloud-rain measurement radar system
ActiveCN107643522AAchieve duplexImplement detectionRadio wave reradiation/reflectionICT adaptationExtreme weatherRadar systems
The invention discloses a dual frequency band dual polarization spaceborne cloud-rain measurement radar system which is mainly composed of an antenna subsystem, a radio frequency subsystem, a digitalsubsystem, a monitoring subsystem and a power supply subsystem. The antenna subsystem adopts a parabolic reflector / microstrip reflective array antenna feeder system, and comprises a parabolic reflector / microstrip reflective array antenna, a Ka frequency band active phased array feed source, a W frequency band beam waveguide feed system and a Ka / W frequency band shared parabolic reflector / microstrip reflective array antenna. The radio frequency subsystem is connected with the Ka frequency band active phased array feed source, the W frequency band beam waveguide feed system and the digital subsystem. The digital subsystem is connected with a terminal. The system provided by the invention has the advantages that the three-dimensional vertical structure information of clouds and precipitationin the field of view can be quantitatively acquired; and the acquired global cloud-rain three-dimensional structure data can be applied to three-dimensional high-precision inversion of atmospheric clouds and precipitation, can be applied to global extreme weather monitoring and forecasting, and can be applied to atmospheric science and numerical simulation studies.
Owner:CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
Dual-polarization broadband weak coupling feed source array
ActiveCN102882009AEasy to receiveSatisfy sampling requirementsPolarised antenna unit combinationsCouplingPhased array feed
The invention discloses a dual-polarization broadband weak coupling feed source array and relates to a phase array feed source receiver in the radio astronomy field. The dual-polarization broadband weak coupling feed source array can be used in feed sources of reflector antennasin the field of communication, observing and control and monitoring. According to the distribution rules of a reflector antenna focal plane field, a hexagonal reflection back cavity vibrator is distributed in a hexagonal small-space distribution mode to form a feed source array, so that energy receiving is facilitated, sampling of a focal plane field distribution is met, and good broadband characteristics and weak array coupling can be achieved. The hexagonal reflection back cavity vibrator comprises a radiator, a coaxial feeder, a hexagonal reflection back cavity and a matching disc, wherein the reflection back cavity adopts a small hexagonal structure, and array forming is facilitated.
Owner:NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
Wide angle scanning ellipsoidal dielectric lens antenna based on phased array feed
InactiveCN109088173ALow profileAvoid the problem that the dielectric constant is too low to be equivalentIndividually energised antenna arraysAs elementCommunications system
The invention discloses a wide angle scanning ellipsoidal dielectric lens antenna based on phased array feed applied to a wide-angle scanning and multi-beam directional communication system. Its basicstructure consists of an elliptical dielectric lens with five layers of dielectric and a 1*9 phased array with a microstrip patch as elements. The lens antenna is compressed in thickness by conversion optics, keeps the focusing performance of the original spherical Luneberg lens; at the same time, the antenna is easy to process because the dielectric constant range is controlled; according to thesuperposition algorithm of element patterns, he element amplitude and phase of the phased array are optimized, so that the accurate wide-angle scanning is realized, and the gain is improved comparedwith the phased array. The application of the phased array fed lens antenna in the lower profile and wide-angle scanning is better solved, and it can play a better role in the multi-beam directional communication and wide-angle scanning system. Based on the basic structure of the invention, other specific embodiments of the invention can be formed by reasonably changing the filling medium type, antenna size, feed unit form and array arrangement mode.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Method and system for equivalent electromagnetic wave orbit angular momentum pulse radar detection
ActiveCN107290728AImprove detection abilityHigh pre-detection signal-to-noise ratioWave based measurement systemsSignal onPhased array feed
The invention provides a method and a system for equivalent electromagnetic wave orbit angular momentum pulse radar detection, and relates to the technical field of radar detection based on a rotatable antenna. A radar detection system comprises a signal emission subsystem, an antenna subsystem and a signal reception subsystem. The method comprises: M dipole loop-antenna arrays distributed uniformly rotating around a center, emitting pulse signals in a rotation process, performing coherent integration on the pulse signals, to generate an equivalent higher-order mode number orbit angular momentum electromagnetic wave signal on a radar receiving end; the higher-order mode number orbit angular momentum electromagnetic wave; using diversity reception capability to further obtain high signal to noise ratio before detection. The higher-order mode number orbit angular momentum electromagnetic wave can generate obvious phase gradient on a target position, and orbit angular momentum electromagnetic waves in different mode numbers can realize waveform diversity on target detection. The method can make detection capability of radar on weak targets greatly improve. A machine rotation antenna of a M dipole can be replaced by an electric sweeping phased array feed source antenna, and the same effects can be obtained.
Owner:TSINGHUA UNIV
A broadband multimode satellite communication phased array antenna
PendingCN109037970AReduce volumeImprove space utilizationSeparate antenna unit combinationsPhased array feedEngineering
The invention discloses a broadband multi-mode satellite communication phased array antenna which belongs to the field of electronic information technology. The antenna includes receiving array face,transmitting array face, integrated information integrated platform, power supply and distribution layer, distributed power supply, inertial system, tracking receiver, condition monitoring and monitoring control, satellite communication terminal, thermal control system and supporting base. The receiving and transmitting arrays work in Ku, Ka. The design idea of the antenna can not only ensure thesimultaneous operation of the antenna transmitting and receiving, but also ensure that the antenna transmitting and receiving have their own working or standby functions, especially suitable for broadband satellite communication on mobile carrier, but also can be used in the fields of phased array feed of reflector antenna, phased array feed of dragon wave lens and so on.
Owner:NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
Miniaturized waveguide power division network
ActiveCN110459851AMiniaturizationRequires minimizationCoupling devicesPhased array feedMiniaturization
The invention discloses a miniaturized waveguide power division network, which is composed of at least two one-into-many waveguide power dividers adopting a double-layer waveguide structure. Each one-into-many waveguide power divider includes a first layer of waveguide structure, a second layer of waveguide structure and at least one first-type transition mechanism, and the first-type transition mechanism is provided with a first height transition part and a second height transition part which are in transition connection with the first layer of waveguide structure and the second layer of waveguide structure respectively so that the first layer of waveguide structure and the second layer of waveguide structure are in planes at different heights. The advantages are as follows: because the waveguide power dividers adopting a double-layer waveguide structure are placed alternately, the space is fully utilized, and the volume of the device is reduced; and for a large phased array feed network, a miniaturized waveguide power division network is realized and the demand of the modern phased array technology for a miniaturized feed network is satisfied under the premise of ensuring excellent isolation of the output port and easy integration of the output port with the circuit.
Owner:SHANGHAI RADIO EQUIP RES INST
Plane bending cross-shaped broadband dual-polarization butterfly-shaped vibrator
PendingCN110034372AIncreased half-power beamwidthSmall sizeParticular array feeding systemsAntenna supports/mountingsPhased array feedBroadband
The invention discloses a plane bending cross-shaped broadband dual-polarization butterfly-shaped vibrator; the plane bending cross-shaped broadband dual-polarization butterfly-shaped vibrator comprises a bottom plate and a butterfly-shaped vibrator feed structure formed by a pair of cross-shaped butterfly-shaped dipoles arranged on the upper end surface of the bottom plate. In order to increase the half-power beam width of a radiation pattern, the antenna size is reduced, and the dual-polarization butterfly-shaped vibrator structure is improved, and a vibrator arm is bent towards the direction of a floor for a certain angle; when the bending angle is 40 degrees, the voltage standing wave ratio (VSWR) is 1.5 or below, and high in-band characteristics can be obtained from 4GHz to 8GHz; thenovel plane bending cross-shaped broadband dual-polarization butterfly-shaped vibrator has a very low profile (smaller than 1 / 6 of low-frequency wavelength), low cross polarization and a symmetric radiation pattern, so that the antenna unit is a relatively good unit selection of a wireless communication phased array antenna and a radio astronomical phased array feed source, and has a relatively high application prospect in millimeter wave communication.
Owner:NAT ASTRONOMICAL OBSERVATORIES CHINESE ACAD OF SCI
Phased array feed phase control circuit, method, device and system
ActiveCN111781580ASmall footprintScale upWave based measurement systemsPhased array feedElectrical connection
The invention discloses a phased array feed phase control circuit, which comprises a phase controller, N first driving modules, N second driving modules and an N * N array consisting of N * N micro heaters; the phase controller is provided with N first pins and N second pins; the N first pins are electrically connected with one ends of the N first driving modules respectively; the other end of thefirst driving module is electrically connected with one end of each of N micro heaters in one column in the heating array assembly; one end of the second driving module is electrically connected withthe other ends of the N micro heaters in one row in the heating array assembly; and N second pins of the phase controller are electrically connected with the other ends of the N second driving modules respectively. According to the scheme, the N first pins and the N second pins are used for achieving heating control over the N * N array composed of the N * N micro heaters in a grouping control mode, the occupied space of the pins corresponding to multiple light paths is reduced, and the scale of an optical phased array chip can be increased.
Owner:THE CHINESE UNIV OF HONG KONG SHENZHEN
A method and apparatus for a dual-focal shaped reflector antenna
ActiveCN108987937AEnables wide-angle scanning capabilityMeet the demand for large scanning angleAntennasPhased array feedAzimuth direction
The embodiment of the invention discloses a method of a dual-focus shaped reflector antenna, which is used for the dual-focus shaped reflector antenna. The dual-focus shaped reflector antenna comprises a phased array feed source and a shaped reflector. The method comprises the following steps of: presetting the shaped reflector as a paraboloid, determining a curve of an azimuth direction tangent plane and a curve of a distance direction tangent plane of the shaped reflector; The curves of the azimuth tangent plane and the distance tangent plane are merged, The curved surface equation of the shaped reflector is obtained. Because the azimuth and distance of the reflector are different, the reflector antenna can realize the scanning range from azimuth + / - 5 to distance + / -3 degrees, and theantenna has a stable gain output in the scanning range. The embodiment of the invention also discloses a device of a dual-focus shaped reflector antenna, the dual-focus shaped reflector antenna and acomputer-readable storage medium.
Owner:INST OF ELECTRONICS CHINESE ACAD OF SCI
Flat-panel passive phased array feed network cable source
InactiveCN108899617ACompact structureShorten the lengthAntenna arraysCoupling devicesPower combinerTransformer
The invention provides a flat-panel passive phased array feed network cable source. The flat-panel passive phased array feed network cable source comprises a power splitter, one or more polarization transformers, a power synthesizer and a flat panel waveguide, which are connected in sequence, wherein each polarization transformer comprises an input end waveguide and an output end waveguide, whichare connected through a cavity. According to the flat-panel passive phased array feed network cable source, the waveguide polarization transformers do not need a rotating device and the structure is compact, so that the length of the transformers can be extremely reduced and the cable source is suitable for standard machining; the structure of the cable source becomes compact; signal leakage is reduced and the bandwidth is improved; the echo loss is better than 20d, and a complete feed signal can be provided for a flat-panel passive phased array antenna.
Owner:CHENGDU SKYT TECH CO LTD
Digital back-end equipment of phased array feed source receiver and phased array feed source receiver
The invention provides a digital back-end device of a phased array feed source receiver and the phased array feed source receiver, and the digital back-end device of the phased array feed source receiver comprises a data transmission module, a digital signal preprocessing module, a data storage module and a beam forming network module, wherein the digital signal preprocessing module comprises a programmable logic gate array integrated with a plurality of multi-channel analog-digital converters, each multi-channel analog-digital converter is used for converting multi-channel analog data in parallel to obtain multi-channel digital data, and the programmable logic gate array is used for performing channelization processing on the multi-channel digital data, and sending data after channelization processing to the data transmission module; and the beam forming network module is used for performing calibration or beam forming according to the channelized data. According to the equipment, thehardware cost can be reduced, two working modes of offline beam forming and real-time beam forming can be realized, and system storage resources can be efficiently utilized.
Owner:NAT ASTRONOMICAL OBSERVATORIES CHINESE ACAD OF SCI
Planar Luneberg lens antenna based on thin cloth phased array feed
ActiveCN114552227AReduce section heightReduce in quantityAntenna supports/mountingsIndividually energised antenna arraysPhased array feedGain
The invention aims to provide a planar luneberg lens antenna based on thin cloth phased array feed, and belongs to the technical field of antennas. According to the antenna, a spherical luneberg lens antenna is compressed into a plane structure through optical transformation, and then a large-spacing thin cloth feed array matched with the plane lens structure is optimized by using an optimization algorithm, so that after the sparse layout of the antenna is determined, the excitation amplitude of the antenna at different scanning angles in the working process is not changed, and the antenna stability is improved. The EIRP index in the scanning range is ensured; meanwhile, the antenna also has the advantages of high gain, low profile and low cost, and has relatively high engineering practicability.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Signal acquisition and processing system and method
ActiveCN111464215AReduce excess spaceReduce weightSpatial transmit diversityMulti-frequency-changing modulation transferencePhased array feedArray element
The invention provides a signal acquisition and processing system. The system is used for collecting and processing multiple paths of array element signals received by a phased array feed source. Thesystem comprises: a signal acquisition and preprocessing unit comprising a first preset number of nodes, each node acquiring a preset number of array element signals, preprocessing the array element signals, dividing the preprocessed array element signals into a second preset number of narrowband signals of different frequency bands, and outputting the second preset number of narrowband signals; acorrelation and beam forming unit which comprises a third preset number of nodes, wherein each node synthesizes the narrowband signals of the fixed frequency band in the first preset number of nodesinto a fourth preset number of beams; and a multi-beam astronomical processing unit which is used for analyzing and storing the beams.
Owner:XINJIANG ASTRONOMICAL OBSERVATORY CHINESE ACADEMY OF SCI
Time modulation phased array feed network chip and time modulation radio frequency system
PendingCN113675623AIncrease powerImprove high pressure resistanceParticular array feeding systemsAntennas earthing switches associationLow noiseNoise (radio)
The invention discloses a time modulation phased array feed network chip, which comprises: a numerical control attenuator module 101 used for realizing time amplitude modulation and eliminating inconsistency of each chip caused by a process; a 0 / 90-degree phase shifter module 103 used for acting together with a Wilkinson power divider WKD2 of a reconfigurable power divider module to form an I / Q orthogonal path so as to realize an orthogonal time modulation phased array system; a 0 / 180-degree phase shifter module 104 controlled by a FPGA control circuit so as to realize time phase modulation; and an amplifier module 105 consisting of a power amplifier and a low-noise amplifier and used for amplifying a transmitted or received radio frequency signal so as to meet the power requirements of the system on a transmitted signal and a received signal, wherein all the modules are integrated in a single gallium nitride-based time modulation phased array feed network chip. The invention also provides a time modulation radio frequency system. According to the invention, the size of the time modulation radio frequency system can be effectively reduced, the phase shift precision is improved, and the system has higher linearity.
Owner:NANJING UNIV OF SCI & TECH
Composite feed source parabolic cylinder antenna and detection satellite
ActiveCN111146560AImprove detection accuracyAvoid Adding UncertaintyParticular array feeding systemsAntenna supports/mountingsPhased array feedEngineering
The invention discloses a composite feed source parabolic cylinder antenna and a detection satellite. Wherein the composite feed source parabolic cylinder antenna comprises a bias parabolic cylinder antenna, a composite feed source array and a parabolic cylinder supporting part; the parabolic cylinder supporting part is used for supporting the bias parabolic cylinder antenna, the composite feed source array comprises a phased array feed source, a sparse feed source array and a feed source mounting plate, and the phased array feed source and the sparse feed source array are arranged on the feedsource mounting plate; the phase center of each feed source in the sparse feed source array is arranged on a focal line of the offset parabolic cylinder antenna, the array direction of the phased array feed source is parallel to the focal line and is arranged in an offset-focus manner, and the feed source aperture surface of the phased array feed source is aligned with the feed source aperture surface of the sparse feed source array. By adopting the double-row feed source array and sharing the parabolic cylinder antenna, a one-dimensional scannable high-gain narrow wave beam and a plurality of elliptical wave beams which are consistent in direction and similar in shape can be formed, the integrated design of the antenna is realized, and the antenna has the technical characteristics of light weight, low cost and high detection precision.
Owner:SHANGHAI SPACEFLIGHT INST OF TT&C & TELECOMM
Novel low-cost phased array feed network
PendingCN114678688AReduce usageLarge scanning angleParticular array feeding systemsAntennas earthing switches associationAgricultural engineeringPhased array feed
The invention relates to a novel low-cost phased array feed network, which comprises an antenna unit, a phase shifter and an array feed network, the array feed network is composed of five single-layer C-BFNs, each single-layer C-BFN comprises two input ports and three output ports, two of the single-layer C-BFNs serve as input layers of the array feed network, and the remaining three single-layer C-BFNs serve as output layers; three output ports of each single-layer C-BFN in the input layer are respectively connected with one input port of the three single-layer C-BFNs in the input layer; the output ends on the two sides of each single-layer C-BFN in the input layer are connected with one antenna unit through a one-digit (0 degree / 180 degree) phase shifter. According to the invention, through cascade connection of a plurality of feed networks, beam control of the four input ports on a 3 * 3 array is realized. Finally, the use number of the T / R assemblies is reduced from nine to four, and the scanning angle of the array antenna is widened.
Owner:CHENGDU DESHAN TECH CO LTD
Ultra-wideband phased array feed source with gradually changing period
PendingCN113097747AImprove rigidityReduce processing costsWaveguide hornsParticular array feeding systemsUltra-widebandSoftware engineering
The invention belongs to the technical field of antennas, and particularly relates to an ultra-wideband phased array feed source with a gradually changing period. A main body of the ultra-wideband phased array feed source is a Vivaldi array antenna, and the ultra-wideband phased array feed source is formed by arranging two Vivaldi antenna units with different unit widths and different bandwidths in a certain mode. The feed source arrangement reduces the number of units to the maximum extent, and the cost is reduced. Due to the ultra-wideband characteristic of the Vivaldi antenna array, the feed source can realize ultra-wideband work. The feed source adopts a dense array to sample a focal plane field so that the reflector antenna can realize higher aperture efficiency. The feed source can be used for a single-reflector antenna system or a double-reflector antenna system, and ultra-wideband high-efficiency work of the reflector antenna is achieved.
Owner:FUDAN UNIV
A detection method and system for an equivalent electromagnetic wave orbital angular momentum pulse radar
ActiveCN107290728BImprove detection abilityHigh pre-detection signal-to-noise ratioWave based measurement systemsSignal onPhased array feed
Owner:TSINGHUA UNIV
A Planar Lumberg Lens Antenna Based on Sparse Phased Array Feeding
ActiveCN114552227BReduce section heightReduce in quantityAntenna supports/mountingsIndividually energised antenna arraysPhased array feedEngineering
The purpose of the present invention is to provide a plane Lunberg lens antenna based on sparse phased array feeding, which belongs to the technical field of antennas. The antenna compresses the spherical Lumberg lens antenna into a plane structure through optical transformation, and then uses an optimization algorithm to optimize a large-spacing sparse feed array that matches the plane lens structure. The excitation amplitude does not change under different scanning angles to ensure the EIRP index within the scanning range; at the same time, the antenna also has the advantages of high gain, low profile and low cost, which has strong engineering practicability.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
A dual-polarized broadband weakly coupled feed array
ActiveCN102882009BEasy to receiveSatisfy sampling requirementsPolarised antenna unit combinationsCouplingPhased array feed
The invention discloses a dual-polarization broadband weak coupling feed source array and relates to a phase array feed source receiver in the radio astronomy field. The dual-polarization broadband weak coupling feed source array can be used in feed sources of reflector antennasin the field of communication, observing and control and monitoring. According to the distribution rules of a reflector antenna focal plane field, a hexagonal reflection back cavity vibrator is distributed in a hexagonal small-space distribution mode to form a feed source array, so that energy receiving is facilitated, sampling of a focal plane field distribution is met, and good broadband characteristics and weak array coupling can be achieved. The hexagonal reflection back cavity vibrator comprises a radiator, a coaxial feeder, a hexagonal reflection back cavity and a matching disc, wherein the reflection back cavity adopts a small hexagonal structure, and array forming is facilitated.
Owner:NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
Circularly polarized spaceborne antenna based on 3dB bridge and spaceborne phased array
PendingCN114267939ALow Profile RequirementsBig stretchRadiating elements structural formsIndividually energised antenna arraysRadiation leakagePhased array feed
The invention discloses a circularly polarized spaceborne antenna based on a 3dB bridge and a spaceborne phased array. A first metal patch is arranged between a feed layer and a dielectric layer; the feed layer is provided with a 3dB coupling bridge, the output end of the 3dB coupling bridge is connected with the first metal patch, and the 3dB coupling bridge is used for circularly polarizing an input signal and transmitting the circularly polarized signal to the dielectric layer; the dielectric layer is used for widening the bit width of the circularly polarized signal and radiating the widened circularly polarized signal outwards; the beneficial effects of the invention are that in the required working frequency band, the axial ratio is lower than 3dB, the standing wave is lower than 1.5, the beam width at the working frequency point is greater than 90 degrees, and the low profile is satisfied; circular polarization is realized in a forced feed mode, and the double-feed mode enables the circular polarization bandwidth to be broadened greatly compared with a common single-feed mode. The radiation leakage of the back surface is reduced, and the normal gain of the antenna and the gain during large scanning angle scanning are improved.
Owner:重庆两江卫星移动通信有限公司
A Radio Astronomical Telescope Combining Large Aperture Spherical Reflector and Phased Array Feed
Owner:NAT ASTRONOMICAL OBSERVATORIES CHINESE ACAD OF SCI
GEO SAR satellite imaging method based on single reflector antenna
PendingCN112327300AFlexible Beam Scanning CapabilityReduce weightRadio wave reradiation/reflectionAngle of incidenceImage resolution
The invention discloses a GEO SAR satellite imaging method based on a single-reflector antenna, belongs to the field of overall design of high-orbit microwave imaging satellites, and aims to perform beam design on GEO SAR of a phased array feed source single-reflector antenna without attitude adjustment and cover all incident angle ranges only through distance-direction electric scanning. In orderto achieve the purpose, the technical scheme of the invention comprises the following steps: S1, selecting an antenna aperture according to the requirements of the minimum unambiguous area and resolution of the antenna, and selecting an antenna focal length according to the antenna aperture; s2, according to an incident angle requirement, calculating a lower visual angle range to obtain a scanning range required to be reached by the antenna, wherein the corresponding relation between the SAR downward viewing angle and the incident angle is shown in the specification, theta is the incident angle, alpha is the downward viewing angle, H is the orbit height and Re earth radius; and S3, setting an antenna feed source to form a scanning range required to be reached by the antenna, and performing satellite imaging.
Owner:BEIJING INST OF SPACECRAFT SYST ENG
Design method and device for a bifocal shaped reflector antenna
ActiveCN108987937BEnables wide-angle scanning capabilityMeet the demand for large scanning angleAntennasAzimuth directionPhased array feed
The embodiment of the invention discloses a method of a dual-focus shaped reflector antenna, which is used for the dual-focus shaped reflector antenna. The dual-focus shaped reflector antenna comprises a phased array feed source and a shaped reflector. The method comprises the following steps of: presetting the shaped reflector as a paraboloid, determining a curve of an azimuth direction tangent plane and a curve of a distance direction tangent plane of the shaped reflector; The curves of the azimuth tangent plane and the distance tangent plane are merged, The curved surface equation of the shaped reflector is obtained. Because the azimuth and distance of the reflector are different, the reflector antenna can realize the scanning range from azimuth + / - 5 to distance + / -3 degrees, and theantenna has a stable gain output in the scanning range. The embodiment of the invention also discloses a device of a dual-focus shaped reflector antenna, the dual-focus shaped reflector antenna and acomputer-readable storage medium.
Owner:INST OF ELECTRONICS CHINESE ACAD OF SCI
A dual-band dual-polarization spaceborne cloud and rain measurement radar system
Owner:CHINA ELECTRONIC TECH GRP CORP NO 38 RES INST
Radio astronomical telescope combining large-aperture spherical reflecting surface and phased array feed
The invention discloses a radio astronomical telescope combining a large-aperture spherical reflecting surface and a phased array feed. The radio astronomical telescope is characterized in that the radio astronomical telescope comprises a spherical reflecting surface which is used for converging incident plane waves through reflection; a phased array feed which is mounted on a feed supporting system and is used for receiving the electromagnetic waves converged by the spherical reflecting surface and sending a received signal to a data processing terminal; and the data processing terminal which is used for calibration of the phased array feed and calculation and data storage required by data processing of the received signal. According to the invention, the spherical reflecting surface is the neutral surface of the FAST, a PAF is composed of 7225 feed units with the size of about 10 m * 10 m, and when the illumination gain of each feed unit at 56.4 degrees is 4.4 dB and the unit spacing is 12 cm, the obtained efficiency is higher than the efficiency of the FAST using a single beam. According to the scheme, a field of view of 2 * 2 square degree can be obtained, and the field of view is larger than the current instantaneous field of view of the FAST.
Owner:NAT ASTRONOMICAL OBSERVATORIES CHINESE ACAD OF SCI
A Compound Feed Parabolic Cylindrical Antenna and Detection Satellite
ActiveCN111146560BImprove detection accuracyAvoid Adding UncertaintyParticular array feeding systemsAntenna supports/mountingsPhased array feedEngineering
Owner:SHANGHAI SPACEFLIGHT INST OF TT&C & TELECOMM
A signal acquisition and processing system and method
ActiveCN111464215BReduce excess spaceReduce weightSpatial transmit diversityMulti-frequency-changing modulation transferencePhased array feedFixed frequency
The present disclosure provides a signal acquisition and processing system, which is used to acquire and process multi-channel array element signals received by a phased array feed source. The system includes: a signal acquisition and preprocessing unit, including a first preset number of nodes, each A node collects a preset number of array element signals, preprocesses the array element signals, and divides the preprocessed array element signals into a second preset number of narrowband signals of different frequency bands and outputs them; the correlation and beamforming unit, It includes a third preset number of nodes, and each node synthesizes a fourth preset number of beams from fixed frequency band narrowband signals in the first preset number of nodes; a multi-beam astronomical processing unit is used for analyzing and storing the beams.
Owner:XINJIANG ASTRONOMICAL OBSERVATORY CHINESE ACADEMY OF SCI
Optimal design method of phased array feed source based on focal plane field sampling of reflector antenna
PendingCN114372380AAccurately determineTo resolve poor performance,Design optimisation/simulationSpecial data processing applicationsPhased array feedDeep space exploration
The invention discloses an optimal design method of a phased array feed source based on focal plane field sampling of a reflector antenna, relates to a high-performance multi-beam antenna technology in the fields of communication, measurement and control, radio astronomy and the like, and aims to provide a phased array feed source design method which is high in efficiency, low in channel number and high in cost performance. According to the method, the characteristics of the focal plane field of the reflector antenna at different focal diameter ratios and different scanning angles are analyzed, the parameter selection principle of the phased array feed source during optimal sampling of the focal plane field is studied, the relation between the antenna aperture efficiency and the PAF design parameters is summarized, a relation curve of the optimal unit spacing of the phased array feed source and the focal diameter ratio is given, and the accuracy of the phased array feed source is improved. A calculation formula of the number of PAF units is exported, a PAF design example and performance analysis are given, and the effectiveness of the design method is verified. The method is suitable for the design of feed sources in the fields of radio astronomy, satellite communication, deep space exploration and the like.
Owner:NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
Systems and methods for phased array passband calibration
Systems and methods are provided for phased array passband calibration, which permits repeated calibration of the antenna system in the field without a moving far field sensor. An example includes anequalization filter coupled to a phased array feed; a calibration probe disposed to couple with an antenna array to transfer radio frequency (RF) energy; a database of probe-to-far-field (FF) transforms having a probe-to-FF transform for each of a plurality of incidence angles; a calibration component operable to: receive calibration probe measurements for a plurality of frequencies; and determinea calculated phased array passband response for at least a first incidence angle, based at least on the calibration probe measurements and a probe-to-FF transform for the first incidence angle; and afilter generation component operable to generate a tuning configuration for the equalization filter, based at least on the calculated phased array passband response.
Owner:THE BOEING CO
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