698 results about "Radome" patented technology

The invention discloses a metasurface array antenna housing, belongs to the technical field of electromagnetic wave regulation and control, and solves the problem of how to improve the transmittance and absorptivity of a metasurface to electromagnetic waves. Electromagnetic waves with different frequencies resonate on the first metasurface wave-absorbing layer and the second metasurface wave-absorbing layer respectively, so that the electromagnetic waves are absorbed by the lumped resistor. And the metasurface wave-transmitting layer re-radiates electromagnetic waves of a communication frequency band to enable the electromagnetic waves to penetrate through the metasurface unit, and meanwhile, the surface of the metasurface wave-transmitting layer can serve as a metal floor of the first metasurface wave-absorbing layer and the second metasurface wave-absorbing layer due to copper coating. The antenna can be widely used in the scenes of radar stealth, communication antenna integration, electromagnetic compatibility, wireless energy transmission and the like, and has a good application prospect.

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.

An antenna, an antenna assembly, and a base station includes a radome, a first antenna portion, and a second antenna portion. The first antenna portion is disposed inside the radome, and the second antenna portion is coupled to the first antenna portion, disposed outside the radome, and exposed to a surrounding environment. In this way, the radome does not need to cover the entire antenna, but covers only a portion of the antenna. Therefore, a wind load acting on a support structure by using the radome can be reduced. In addition, a cavity is provided to accommodate transmission lines of the antenna together, so that use of a connecting device such as a jumper can be reduced or even avoided, to reduce a transmission loss of the antenna.

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.

The invention discloses a high-efficiency transmission and reflection polarization conversion metasurface, which belongs to the technical field of electromagnetic wave regulation and control, and is characterized in that a plurality of transmission and polarization conversion metal structure layers arranged in an array are arranged between a first dielectric substrate and a second dielectric substrate; the top of the third dielectric substrate is correspondingly provided with a plurality of reflective polarization conversion metal structure layers which are arranged in an array; an air layer is arranged between the second dielectric substrate and the third dielectric substrate; the bottom of the first layer dielectric substrate and the top of the second layer dielectric substrate are respectively and correspondingly provided with metal grids, and a metal grid cavity is formed between every two adjacent metal grids. The metasurface has the functions of transmission polarization conversion and reflection polarization conversion, high-efficiency transmission polarization conversion can guarantee normal communication in a band, high-efficiency reflection polarization conversion can change polarization of radar detection waves, and the metasurface can be used for an embedded antenna cavity antenna housing.

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 present disclosure relates to a base station antenna; the base station antenna comprises: a radio; a feed board and a radiating element array mounted on the feed board, where the radiating element array comprises a plurality of radiating elements, and each radiating element extends forward from the feed board; a radome arranged in front of the radiating element array; and a plurality of radome supporting members mounted on the radio and extending forward from the radio to the radome for supporting the radome.

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 invention discloses a non-magnetic passive space nonreciprocal antenna housing based on an artificial electromagnetic metamaterial, and relates to the technical field of stealth materials, the non-magnetic passive space nonreciprocal antenna housing comprises antenna housing units which are periodically spliced in a plane, and each antenna housing unit comprises two dielectric substrates which are vertically crossed with each other; artificial microstructure units are arranged on the upper surface and the lower surface of the dielectric substrate; wherein the artificial microstructure unit arranged on the upper surface of the dielectric substrate comprises a double-opening SRR ring, the artificial microstructure unit arranged on the lower surface of the dielectric substrate comprises an asymmetric square opening ring, and the centers of the double-opening SRR ring and the asymmetric square opening ring are asymmetric. The technical problems that in the prior art, a non-reciprocal super-electromagnetic surface needs external magnetic bias or an external power source, preparation is complex, and integration is difficult are solved.

The invention provides an antenna housing and a base station antenna. The radome can solve the problems that a traditional radome has obvious transmission loss and polarization mismatch during large-angle incidence, and the structural strength and the wave-transparent performance are difficult to consider at the same time. The antenna housing comprises a dielectric main body, at least one part of the dielectric main body is composed of a plurality of concave-convex units which are periodically arranged, each concave-convex unit is provided with a first surface and a second surface which are opposite to each other, and the second surface is a plane; the first surface comprises a concave area and a convex area surrounding the concave area, the thickness of the concave-convex unit in the concave area is a first thickness, the thickness of the concave-convex unit in the convex area is a second thickness, and the first thickness is half of the wavelength of the equivalent medium; the second thickness is N times of the first thickness, and N is larger than or equal to 1.2 and smaller than or equal to 1.5. According to the invention, mechanical strength and wave-transparent performance can be satisfied at the same time, and manufacturing cost can be reduced.

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 invention belongs to the technical field of composite materials and radomes, and particularly relates to a layer structure of a radome body and a manufacturing method. The skin comprises a first skin layer, an interlayer, a second skin layer and a polyvinyl fluoride film layer which are sequentially arranged from top to bottom. Through collaborative design of a micro-nano composite structure and a low-surface-energy material, a self-cleaning surface skin layer with super-hydrophobicity, high wave transmission and weather resistance is constructed. Compared with a traditional fluorocarbon coating, the wave transmission rate is 60-70% and is improved by more than 25%, the signal transmission loss is remarkably reduced, and the harsh requirement for the wave transmission performance of the antenna housing is met. The cleaning cost of a traditional antenna housing can be saved by more than 80%, especially for high-altitude and complex-structure antenna housings, high-altitude operation or special equipment is not needed, and the maintenance safety risk is reduced. The replacement frequency of the radome caused by aging and abrasion of the coating can be reduced, and the overall life cycle cost of equipment is reduced.

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 invention provides a frequency selective surface unit and a frequency selective surface antenna housing, and relates to the technical field of communication. The frequency selection surface unit is composed of a first metal layer, a first dielectric layer, a second metal layer, a second dielectric layer, another second metal layer, a third dielectric layer and another first metal layer which are sequentially stacked from top to bottom. Wherein the two first metal layers form an improved square gap ring, and the two second metal layers form an improved Jerusalem cross gap. Moreover, the two first metal layers and the two second metal layers are respectively of a rotational symmetry structure, and the rotation centers of the two first metal layers coincide with the rotation centers of the two second metal layers. And the M * N periodically arranged frequency selective surface units form the frequency selective surface antenna housing. The frequency selective surface antenna housing provided by the invention has the advantages of high frequency selectivity, large-angle incidence stability and miniaturization while realizing a dual-frequency dual-polarization function.

The utility model provides an anti-unmanned aerial vehicle antenna structure, which comprises an antenna housing, a reflecting plate, a plurality of radio frequency cable joints arranged in the antenna housing, a feed network, an antenna half-wave oscillator, a power divider, a coupler, a directional coupler, a directional antenna system, a control system and a power supply unit, wherein a plurality of radio frequency cable probes are connected with the antenna half-wave oscillator; comprising a 868MHz / 915MHz radio frequency cable joint, a 1.5 GHz radio frequency cable joint, a + 2.4 GHz radio frequency cable joint, a-2.4 Ghz radio frequency cable joint, a 5.8 GHz radio frequency cable joint and a 533MHz-6000 MHz radio frequency cable joint. The antenna half-wave oscillator comprises a T-shaped antenna, a symmetrical antenna, a ceramic antenna and an aluminum plate antenna; the power divider is connected with the symmetrical antenna; the coupler is connected with the T-shaped antenna; the directional coupler is connected with the ceramic antenna; the directional antenna system is connected with the control system. The antenna provided by the utility model is smaller in structure, improves the interference precision, reduces the energy consumption, enhances the anti-interference capability, and is higher in antenna gain.

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.

Example embodiments relate to frequency selective structures for automotive radar. A system may include a frequency selective structure that is coupled to a radome and configured to optimize a desired band-pass for specific performance by one or more antennas. The frequency selective structure may comprise arrays of micro-wires forming a plurality of intersections and one or more patches positioned at one or more intersections of the plurality of intersections. In some cases, at least one patch of the one or more patches may be positioned with an offset relative to a corresponding intersection of the one or more intersections and the frequency selective structure has a rotational angle with respect to an antenna polarization of the one or more antennas. The frequency selective structure may be connected to a current source that can modify the temperature of the structure to melt rain or snow off the radome.

The invention discloses a PPE / PPS (polyphenylene sulfide) composition and a preparation method thereof. The composition is prepared from the following components in percentage by weight: 35-45% of PPE resin, 20-30% of PPS resin, 15-30% of glass fiber, 2-15% of inorganic filler, 1-5% of compatilizer, 2-10% of fluidity improver and 0.6-1.5% of other auxiliaries. According to the invention, the contradiction between high flowability and high heat resistance as well as high rigidity and low warpage generally faced by high-filling engineering plastics is solved, and the high-filling engineering plastics are very suitable for the frontier fields with extremely high performance requirements, such as 5G mobile phone middle frames, millimeter wave radar radomes, new energy automobile IGBT module heat dissipation cover plates and the like, and have wide market application prospects.

The invention discloses a multi-dielectric-layer pressure-resistant composite material and application of the multi-dielectric-layer pressure-resistant composite material in an antenna housing. The multi-dielectric-layer pressure-resistant composite material has a light high-strength structure and also has high wave-transparent performance. The multi-dielectric-layer pressure-resistant composite material specifically comprises a plurality of high-structural-strength surface layers and supporting core layers which are arranged in sequence, and the high-structural-strength surface layers are located on the outermost layer. The high-structural-strength surface layer is made of a fiber-reinforced resin-based composite material, and the supporting core layer is made of a low-density pressure-resistant composite material. Compared with the prior art, the multi-dielectric-layer pressure-resistant composite material provided by the invention has the following progress: the multi-dielectric-layer pressure-resistant composite material is low in dielectric constant, pressure-resistant and high in wave-transparent performance, can meet the index requirement that the insertion loss is less than 1.5 dB, and can also meet the pressure requirement of external pressure. And multi-frequency-band design can be carried out for different wave-transparent and pressure-bearing requirements.

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.