435 results about "Radome" patented technology

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

The metasurface array antenna housing comprises a plurality of array units of the same structure, each array unit sequentially comprises a first lightning protection layer from top to bottom, and each first lightning protection layer comprises four copper metal cylinders and a lightning protection top layer drainage metal patch; the second metasurface wave absorbing and transmitting layer comprises a first dielectric substrate, and four quasi-rectangular patches, four lumped resistors, four quasi-triangular patches and four quasi-square rings which are arranged on the upper surface of the first dielectric substrate; the third metasurface wave-transparent layer comprises a square metal patch, and a first circular ring and a second circular ring are etched on the square metal patch. Lightning is guided to the third metasurface wave-transparent layer through the first lightning protection layer, the lightning is conducted to other areas through the metal patch, damage of the lightning to the antenna housing is effectively avoided, and the antenna housing can directly replace a lightning protection strip for use; the structural size is greatly reduced, the angle stability is improved, and integration is facilitated; the copper-clad surface of the third metasurface wave-transparent layer can be used as a metal back plate of the second metasurface wave-absorbing layer, and structural multiplexing is achieved.

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

The utility model relates to a missile-borne low-profile, miniaturized and low-frequency-division-ratio dual-frequency antenna, and belongs to the technical field of communication. The dual-frequency antenna comprises a metal bottom plate, an antenna housing fixed with the metal bottom plate, and a dielectric substrate fixed between the metal bottom plate and the antenna housing. Wherein the dielectric substrate comprises an upper-layer dielectric substrate and a lower-layer dielectric substrate which are bonded with each other; metal patches are loaded on the surfaces of the upper-layer dielectric substrate and the lower-layer dielectric substrate; the upper-layer dielectric substrate and the lower-layer dielectric substrate are electrically connected through a metal column located on the central axis of the dielectric substrate, and the lower-layer dielectric substrate and the metal bottom plate are electrically connected through a feed probe located on the central axis; and the metal patches on the surfaces of the upper-layer dielectric substrate and the lower-layer dielectric substrate are horizontally symmetrical along the central axis. According to the utility model, the dual-frequency antenna with low profile, small size and low frequency division ratio is realized, the frequency division ratio is low under the condition that the basic radiation efficiency is guaranteed, and two narrowband working frequency bands can be provided in the s wave band.

The embodiment of the invention provides a design method of a wave-absorbing / wave-transmitting electrically-controlled switchable antenna housing, the structure of the antenna housing comprises an absorbing layer frequency selective surface, a dielectric layer and a wave-transmitting layer frequency selective surface from top to bottom, the absorbing layer frequency selective surface can carry out in-band loss and in-band transmission, the wave-transmitting layer can carry out in-band transmission and out-of-band reflection, and the dielectric layer can carry out in-band transmission and out-of-band reflection. The overall structure interacts to form a radar radome structure integrating absorption and transmission; a microwave network is adopted to carry out impedance analysis on the absorption and transmission radome, parameters are set to represent the characteristics of the microwave network, and meanwhile, a transmission matrix of the microwave network is analyzed through a matrix. The designed antenna housing not only has good out-of-band wave-absorbing stealth performance, but also can switch an in-band wave-transmitting state to a wave-absorbing state through electric control to realize limit stealth.

The utility model provides a waveguide antenna structure with a frequency selective surface structure and a waveguide radar, and the structure comprises a waveguide antenna which is provided with a waveguide slot array and a frequency selective surface structure; the waveguide slot array is arranged on the waveguide antenna in a penetrating manner, and the frequency selective surface structures are distributed on the peripheral side of the waveguide antenna; the frequency selective surface structure comprises surface structure units, and the frequency selective surface structure is formed by arranging a plurality of surface structure units. According to the utility model, the frequency selective surface structure absorbs reflection between the top surface of the antenna and the antenna housing and reduces distortion of a directional diagram; surface waves can be reduced, space coupling between the antennas is reduced, and the isolation between the antennas is improved; the beam directivity can be adjusted, and beam performance specific directivity can be shaped.

[Object]Provided are a radar apparatus that can prevent the leakage of interference waves from a radome, and an on-vehicle sensing system including the radar apparatus.[Solving Means]The radar apparatus of the present disclosure includes a substrate having an antenna structure in which a radiating portion for a radio wave is provided on a first surface, a radome disposed to face the first surface of the substrate, and a radio wave absorbing member disposed between the substrate and the radome, having an opening formed in a portion corresponding to the radiating portion, and including an insulator configured to absorb a radio wave.

The invention discloses a phased array radar and a low-altitude detection radar system, the phased array radar comprises a lower shell and an upper shell which are oppositely arranged in a first direction, the lower shell and the upper shell define a containing cavity, and the containing cavity comprises a first cavity located in the lower shell; the phased array radar further comprises a frequency synthesizer, a signal processing plate, a heat conduction plate, an air cooling mechanism, a plurality of TR assemblies, an antenna and an antenna housing. The frequency synthesizer is arranged in the first cavity. The signal processing plate is arranged in the first cavity and is compactly arranged with the frequency synthesizer in the second direction; the heat conducting plate is arranged in the first cavity and located on the side, facing the upper shell, of the signal processing plate, the heat conducting plate is attached to the frequency synthesizer and the signal processing plate, and a cooling pipe is embedded in the heat conducting plate; the air cooling mechanism is arranged in the containing cavity and used for supplying air to the heat conduction plate so as to cool the heat conduction plate. The antenna housing is arranged on the side, away from the lower shell, of the upper shell so as to cover the TR assembly and the antenna. Through the compact arrangement of the frequency synthesizer and the signal processing board, the size of the phased array radar can be greatly reduced, and the phased array radar is convenient to carry and deploy.

Systems and methods are provided for a digital beamformed phased array feed. The system may include a radome configured to allow electromagnetic waves to propagate; a multi-band software defined antenna array tile; a power and clock management subsystem configured to manage power and time of operation; a thermal management subsystem configured to dissipate heat generated by the multi-band software defined antenna array tile; and an enclosure assembly. The multi-band software defined antenna array tile may include a plurality of coupled dipole array antenna elements; a plurality of frequency converters; and a plurality of digital beamformers.

Provided is a low-profile composite antenna device that can be made compact while ensuring antenna transmission and reception characteristics. A low-profile composite antenna device for a vehicle is composed of a base plate (10), a circuit substrate (20), a radome (30), a first element (40), and a second element (50). The radome (30) has a ridge portion (31) oriented in the longitudinal direction toward the vehicle travel direction and side portions (32) extending from both sides of the ridge portion (31). The first element (40) is disposed on the left side in the vehicle travel direction and is disposed in a manner inclined with respect to the base plate (10) as viewed from the front in the vehicle travel direction, with the upper end edge (41) disposed in the vicinity of the ridge portion (31). The second element (50) is disposed on the right side in the vehicle travel direction, with the upper end edge (51) disposed in the vicinity of the ridge portion (31) in a manner spaced apart from the first element (40), and the second element (50) is disposed opposite the first element (40) toward the base plate (10) from the ridge portion (31).

The application discloses a kind of antenna cover wave permeability test method, device, equipment and medium of vehicle mobile base station, applied to rail transit technical field, for different preset scene according to the rotation angular velocity curve of rotation angular velocity variation with time Control turntable drives millimeter wave vehicle mobile base station, radio frequency transmitting end and antenna cover to be tested to rotate;Rotation angular velocity curve is set in advance based on the actual running speed curve of vehicle under preset scene;In the process of turntable rotation, the transmission signal intensity of radio frequency transmitting end and the receiving signal intensity of ground base station are acquired at each time;Based on each transmission signal intensity and corresponding receiving signal intensity, actual wave permeability data varying with rotation angular velocity under preset scene is obtained;According to standard wave permeability data varying with rotation angular velocity under each preset scene and corresponding actual wave permeability data, whether the wave permeability of antenna cover to be tested meets wave permeability requirement is determined;It can improve the test accuracy of antenna cover.

The invention discloses an aircraft radome lightning protection structure and a processing method thereof. The lightning protection structure comprises a radome body, and a first metal shunting strip, a second metal shunting strip and a medium type shunting strip are arranged on the outer side face of the radome body. Lightning protection shunting strips are reasonably arranged on the outer surface of the radome, a medium type shunting structure and a metal shunting structure are designed in a mixed mode, the distance and section parameters of the shunting strips are accurately designed, the lightning protection structure of the aircraft radome is machined, lightning current can be fully and efficiently introduced into a main lightning path of an aircraft body, and when the aircraft body is struck by lightning, the lightning protection structure can be used for lightning protection. The radome has the advantages that lightning can be effectively attracted, lightning current is attached to the shunt strips, the radome body cannot be broken down, the shunt strips can safely bear 200KA lightning current and cannot be damaged, the lightning protection design requirement is met, the loss of the wave transmission rate of the radome body is low, the lightning protection effect is remarkable, and the safety and reliability of an aircraft are ensured; the method can be widely applied to various aircraft radomes.

A radar device according to an embodiment, and a driving method therefor are disclosed. The radar device comprises: an antenna; a radome which is arranged above the antenna and which has a shape that changes by means of an external stimulus; and a driving unit which is connected to at least one side of the radome and which applies the external stimulus to at least one side of the radome according to a predetermined control signal.

An aircraft radome and radar assembly includes: a radome arranged on the nose of the aircraft; a radar inside the radome, the radar operating in the millimeter domain and including a transmission antenna for emitting a TM polarized wave and a reception antenna; the radome includes an integrated window in front of the radar, the window being of a material transparent to millimeter waves; the radar being arranged so the angle between the maximum gain direction of the transmission antenna and the normal to the window is within an angular range [θB−θ1; θB+θ2], with OB being the Brewster angle for an air / window interface, θ1 and θ2 determined to obtain reflectivity at said air / window interface less than a predefined threshold; and an isolation partition between the transmission antenna and the reception antenna, the isolation partition being substantially in contact with the window and with the radar.

The invention discloses a two-dimensional phased array radar array plane for an X wave band, and the array plane comprises an array plane skeleton, one side of the array plane skeleton is provided with an electric control assembly, and the other side of the array plane skeleton is provided with a connection assembly. The electric control assembly comprises an integrated board, and a module assembly is integrated on the integrated board. A connector is further arranged on one face, facing the array plane framework, of the sealing plate, an integrated frame used for integrating umbrella-shaped arrays is further arranged on the other face of the sealing plate, and the sealing plate and the integrated frame are sealed on the array plane framework through a radome. The array plane skeleton is also provided with a connecting hole, and the interior of the array plane skeleton is forcibly cooled through a fan installed in the connecting hole. All the modules are integrated on the integrated board, the electric control assembly and the connecting assembly are separated through the array plane framework, the electric control assembly and the connecting assembly are each provided with an independent heat dissipation space, forced air cooling heat dissipation is achieved through the fan, and on one hand, the equipment integration degree is high; and on the other hand, centralized heat dissipation is facilitated.

This invention discloses a co-integrated device for a low-crosstalk RF front-end and array antenna for millimeter-wave radar, comprising a main board, a shielding plate, an RF module, and an array antenna module. The shielding plate is horizontally positioned above the main board, and a frame is provided outside the shielding plate. Support columns are vertically mounted at the four corners of the frame and between the shielding plate and the main board. A sub-plate is mounted on the surface of the shielding plate, and the array antenna module is mounted on the surface of the sub-plate. An antenna cover is mounted on the sub-plate to cover the array antenna module. The RF module is mounted on the side of the main board away from the shielding plate, and the pins of the RF module are soldered and fixed to the main board. Pressure bars are provided on both sides of the pins to hold them in place. This invention has a simple structure and actively manages and reduces electromagnetic crosstalk between the array antenna and the RF front-end through a combination of increased distance, physical shielding, and adjustable position; at the same time, the pin-fixing structure enhances the mechanical reliability of the RF module.

The invention provides a high-temperature-resistant low-dielectric-loss cyanate ester-based composite material and application thereof to a radar-resistant high-power-density antenna housing, and meets the requirement of continuously improving the transmission power of antenna signals on the power-resistant performance of the antenna housing. The high-temperature-resistant low-dielectric-loss cyanate ester-based composite material disclosed by the invention is composed of a prepreg plate, a glue film and a honeycomb, matrix resins of the prepreg plate, the adhesive film and the honeycomb are all modified cyanate ester-based resins; the modified cyanate ester-based resin is prepared by blending and modifying benzoxazine resin, bismaleimide resin, phenolic resin, polyimide resin and cyanate ester resin. The cyanate ester-based composite material with high temperature resistance and low dielectric loss has the advantages of high wave transmission rate, low reflectivity, low thermal conversion efficiency, high heat dissipation efficiency and excellent heat resistance.

The present application relates to a kind of by in-situ oxygen removal carbon improves high temperature wave-transparent performance of organic silicon composite material and preparation method thereof, select methyl organosilicon resin (i.e. silicon-oxygen bond (Si-O) is main chain, methyl (CH3) is side chain high molecular compound) as precursor, select toluene and ethanol according to (4-5):1 Proportion mixed as solvent, by mixing preparation resin solution, and in resin solution according to certain proportion mixed addition cerium salt with acetylacetone cerium salt;Resin solution is compounded with fiber preform by vacuum impregnation process, by impregnation-curing, obtain the organic silicon composite material with good dielectric property.Compared with prior art, the composite material of the present application has the function of stable dielectric property at high temperature, and can be applied to missile radar antenna cover material.

The radome bonding tool comprises a chassis base internally provided with a containing cavity, a telescopic arm extending in the vertical direction is slidably connected to the position, on one side of the containing cavity, of the chassis base, a pressing roller assembly is rotationally assembled at the top end of the telescopic arm, and one end of the pressing roller assembly extends in the horizontal direction; the compression roller assembly is arranged on the antenna main body and is rotationally connected with the gear roller assembly through an elastic connecting piece, the compression roller assembly is configured to compress a glue film on the antenna main body, the gear roller assembly is configured to imprint the compressed glue film to form corrugated lines, the compression roller assembly is hollow, and a plurality of steel balls are arranged in the compression roller assembly. And the plurality of steel balls are configured to jump up and down along with the rotation of the compression roller assembly so as to assist the adhesive film in discharging bubbles generated during surface mounting while compacting the adhesive film. The arc-shaped protrusions are arranged in the compression roller assembly, the rotary motion of the compression roller is converted into micro-vibration generated by irregular collision of the steel balls, and therefore the surface tension of bubbles is damaged through vibration, and the micro-bubbles are actively discharged.

The utility model relates to a health monitoring system. The system comprises indoor equipment equipped with a sensor module, a processor in communication connection with the sensor module, and an alarm system. The embodiment of the utility model discloses breakthrough integration of radar technology and artificial intelligence in common household equipment (ceiling fan). The system is composed of a radar module and a decorative antenna housing which are seamlessly integrated, and a fan is converted into cautious and unnoticeable health monitoring equipment. The radar module remotely transmits signals to a monitored area, captures signals reflected from an individual body, and provides continuous real-time data about vital signs such as heart rate and respiratory rate. After the information is processed by the artificial intelligence processor, the system can detect abnormal conditions, and an alarm conveyed to the user through the user interface is triggered. The innovative system can adapt to different living environments and has deployment flexibility, and a new era of comprehensive, continuous and user-friendly health monitoring is created.

The application provides a kind of co-woven three-dimensional interpenetrating network reinforced aerogel composite material and its preparation method and application.The composite material is composed of reinforced phase and matrix phase, the reinforced phase is three-dimensional interpenetrating network fiber felt prepared by integrated weaving or needling process, containing hollow fiber and solid quartz fiber, which are interpenetrated and entangled in three-dimensional space to form a continuous network skeleton;The matrix phase is silica-based aerogel filled and coated network pores.The preparation method includes the steps of forming, sol impregnation, gelation and aging, supercritical drying and other steps of co-woven preform, and can also include hydrophobic post-processing.The material has the characteristics of light weight, high strength, ultra-low thermal conductivity and excellent wave-transparent performance, and is suitable for hypersonic aircraft radome, antenna window, radar fairing and satellite communication wave-transparent components, which can meet the requirements of load bearing, heat insulation and wave-transparent integration.

The invention discloses a bearing and wave-transmitting integrated design method and system for a variable-density honeycomb structure radome, and relates to the technical field of high-speed aircraft radome design. The method comprises the following steps: carrying out force / heat / electric performance characterization on a honeycomb cell element model; sensitivity analysis is conducted on the relation between the cell element structure parameters and the electromagnetic performance, and key design parameters are obtained; establishing an electrical performance calculation model of the two-dimensional honeycomb structure planar radome; determining an antenna-radome system, dispersing the three-dimensional radome in the axial direction to form a plurality of design points, and calculating a weighted average incident angle and force thermal load distribution of each design point; calculating an initial honeycomb relative density recommendation value at each design point; calculating the wave transmission rate and the aiming error of the formed variable-density radome; calculating the force thermal deformation and stress of the variable-density radome; and judging whether the scheme performance meets constraint conditions or not. By optimizing the distribution rule of the variable-density honeycomb structure, comprehensive optimization of the bearing performance and the wave-transparent performance of the radome is achieved.