28 results about "Feed horn" patented technology

The application relates to a large-diameter high-power pseudo-Bessel beam generation method and a generation device, and belongs to the technical field of communication. The method comprises the following steps: S100, an electromagnetic beam output by a feed horn is propagated to a first reflecting surface, and a target pseudo-Bessel beam is reversely propagated to a second reflecting surface; S200, the electromagnetic beam is propagated to the second reflecting surface through the first reflecting surface, a phase difference on the second reflecting surface is obtained, and a deformation variable of the second reflecting surface is updated; S300, the target pseudo-Bessel beam is propagated to the first reflecting surface through the second reflecting surface, a phase difference on the first reflecting surface is obtained, and a deformation variable of the first reflecting surface is updated; and S400, steps S100 to S300 are repeated until the relative field distribution of the output electromagnetic beam and the target pseudo-Bessel beam reaches a stable state, and a large-diameter high-power pseudo-Bessel beam is obtained. The application can solve the technical problems of existing media loss and limited power capacity.

The invention provides a near-field feed low-complexity reconfigurable antenna system, which belongs to the technical field of millimeter wave communication antennas and comprises a 1-bit phased array, a waveguide feed horn array and an air gap between the 1-bit phased array and the waveguide feed horn array. The 1-bit unit is composed of two magnetoelectric dipoles, and two diodes are integrated in the receiving unit to achieve 1-bit phase control. According to the 1-bit reconfigurable magnetoelectric dipole phased array disclosed by the invention, one horn mouth surface is used as a near-field feed source of the 2 * 2 magnetoelectric dipole sub-array, so that not only is the uniformity of aperture irradiation ensured through near-field coupling, but also the number of required phase shifters is reduced, and the excitation of the 1-bit reconfigurable magnetoelectric dipole phased array is conveniently realized. The waveguide phase shifter is directly integrated in the horn array antenna, by means of the working phase range wide enough, the phase shifter can effectively achieve phase distribution needed by array near-field feed, and mirror lobes in scanning beams are successfully suppressed. The reconfigurable array antenna is high in aperture efficiency, low in profile and simple in structure, and has the broadband scanning capability.

The application discloses a kind of phase electromagnetic metasurface design methods based on two-phase method, mainly solve the problem of electromagnetic metasurface structure complexity when existing technology electromagnetic metasurface is simultaneously regulated in amplitude phase.It is implementation scheme: initialization electromagnetic metasurface parameter;Electromagnetic metasurface unit required by two-phase method is calculated phase matrix;Design the electromagnetic metasurface unit including metal grating layer, two layers of dielectric layer and metal patch, and draw the phase table of the electromagnetic metasurface unit;According to the required phase of each unit of electromagnetic metasurface and the phase table of electromagnetic metasurface unit, the state of each unit of electromagnetic metasurface is adjusted to obtain adjusted electromagnetic metasurface;Feed horn is placed above adjusted electromagnetic metasurface, and radio frequency signal is added to feed horn, to generate required beam, complete phase electromagnetic metasurface design.The application can reduce the complexity of electromagnetic metasurface structure, improve the beam design capability of electromagnetic metasurface, and can be used for wireless transmission, communication system.

The utility model discloses a kind of microwave communication is used to feed source horn prevents bird device, including feed source horn, the top end of the feed source horn is integrally connected with drive box, the drive box is circular ring structure, drive box inside is fixedly connected with sliding block, sliding block top is provided with slide rail, the slide rail is circular ring structure, slide rail bottom is inserted with sliding block, sliding block and slide rail structure are matched, slide rail top is fixedly connected with driving rack, drive box top is provided with annular opening, the annular opening inside is slidably connected with mounting seat, mounting seat top is threadedly connected with prevent main spine, prevent main spine outer wall is fixedly connected with prevent small spine, mounting seat bottom is connected with second motor, second motor bottom is fixedly connected with driving rack, driving rack one side is engagedly connected with driving gear. The device can realize the automatic driving of bird, avoid the habitat of bird on feed source horn, thereby avoid feed source horn to be damaged by bird, prolong the service life of feed source horn.

The invention discloses an SIW transmission array antenna fusing multiple phase modulation modes, and belongs to the technical field of transmission array antennas. According to the antenna, antenna units form an array according to a period, and a feed source horn is arranged at the bottom of the antenna unit array. The antenna unit comprises two layers of linear polarization metasurfaces which are arranged up and down and three layers of SIW phase delay lines in the middle. According to the multiple phase modulation modes, the transmission characteristics of the SIW are utilized, the positions of metal through holes corresponding to SIW delay lines are changed, and then the length or the width of the SIW structure is changed, or the length and the width of the SIW structure are changed at the same time, so that the transmission phase of the SIW is changed, and finally the transmission phase of the transmission array unit is changed. Simulation proves that the SIW transmission array antenna provided by the invention can realize high gain and wide bandwidth.

The application provides a kind of transmission RIS transceiver downlink multi-stream communication system and method, comprising: transmission RIS transceiver module: including intelligent controller and transmission RIS panel;Intelligent controller generates corresponding control signal, changes the phase of transmission wave in RIS unit by control line, sends to user module;Loudspeaker antenna module: the information of intelligent controller module is loaded into the carrier of emission and sent to user module, and the information of transmission RIS transceiver module is loaded into the carrier of emission and radiated;User module: after receiving the signal sent by loudspeaker antenna module, harmonic extraction, symbol recovery and demodulation operation are carried out.The architecture proposed in the application can realize multi-stream communication only by equipping a radio frequency chain of feed horn antenna, and is a more low-power and low-cost solution.The architecture proposed in the application considers that each transmission unit is limited by its transmission capacity, and is more novel.

The application discloses a broadband polarization-insensitive 1-bit electrically-controlled programmable metasurface antenna, which comprises an electrically-controlled programmable metasurface and a feed horn, and the electrically-controlled programmable metasurface comprises M*N periodically arranged metasurface units, the unit comprises, from top to bottom, a metal layer one, a high-frequency dielectric substrate one, a metal layer two, a prepreg layer, a metal layer three, a high-frequency dielectric substrate two and a metal layer four, which are coaxially stacked in sequence; a metalized through hole is arranged at the center of the metasurface unit, the metalized through hole vertically penetrates through the high-frequency dielectric substrates and the prepreg layer and is connected with all the metal layers except the metal layer two; metalized blind holes are arranged around the metasurface unit, the metalized blind holes vertically penetrate through the high-frequency dielectric substrate one and are connected with the metal layer one and the metal layer two; four parallel PIN diodes are arranged on the metal layer one; the metasurface antenna has the characteristics of wide frequency band, full polarization compatibility, high polarization isolation and simple structure, and is suitable for satellite communication and 5 / 6G mobile communication.

The application discloses a multi-band reconfigurable reflectarray antenna, which comprises a feed horn and a reflectarray surface, and the reflectarray surface comprises a plurality of periodically and equidistantly arranged reflectarray units; the reflectarray unit comprises a dielectric plate, a radiation structure, a phase-shifting device and a control network; the radiation structure is a ring-shaped slot structure; two phase-shifting devices are mirror-installed on the radiation structure, and the on-off state of the phase-shifting devices is controlled by the control network to realize polarization conversion function and 1-bit phase control. The unit can work in multiple modes, thereby realizing multi-band reconfiguration. In particular, the unit can work in a first mode, a second mode and a third mode, and the corresponding frequencies are approximately one frequency, two frequencies and three frequencies. The application can realize dynamic scanning of multiple frequency bands by using the same aperture, and has wide application prospects in many fields such as satellite communication and mobile communication.

The utility model relates to a microstrip feed horn antenna, belongs to the technical field of antennas, and solves the technical problem that the gain and directivity of a conventional microstrip feed antenna are difficult to optimize and adjust according to actual requirements. The microstrip feed horn antenna comprises a horn cavity, a feed waveguide cavity and a feed printed board, the horn cavity is arranged on the feed waveguide cavity, the feed waveguide cavity bears the feed printed board, the distance between the feed printed board and the bottom of the feed waveguide cavity can be adjusted, the feed printed board comprises a first patch and a second patch which are connected with each other, and the first patch and the second patch are connected with each other. The first patch is connected to the feed network to realize feed, and the second patch is used for realizing impedance matching of the antenna; by adopting the technical scheme that the distance between the feed printed board and the bottom of the feed waveguide cavity can be adjusted, the distance between the first patch and the bottom of the feed waveguide cavity is also adjusted, so that the gain and directivity of the antenna can be optimized and adjusted according to actual requirements in the actual operation process.

The present application relates to a reflector antenna repointing device and a reflector antenna, the reflector antenna repointing device comprising: a microwave lens receiving an input field and providing an output field; a mounting structure connecting the microwave lens to the reflector antenna and mounting the microwave lens above a feed horn; and an alignment feature at the mounting structure, the alignment feature being configured for setting a position and orientation of the microwave lens relative to the reflector antenna, the alignment feature defining a lateral shift of the output field relative to the input field perpendicular to an axis of the reflector; the reflector antenna repointing device being configured to repoint the input field from an old satellite to a new target satellite without manual fine tuning.

The invention discloses a wide-angle scanning transmission array antenna based on an inclined beam unit. The wide-angle scanning transmission array antenna comprises a transmission array plane and a feed source horn which is arranged opposite to the transmission array plane and is adjustable in position. The transmission array surface comprises a plurality of array surface units, each array surface unit comprises a transmitting unit and a receiving unit, the transmitting units and the receiving units are connected through connecting metal through holes and share the same metal floor, and two rows of metal through holes which are arranged in a staggered mode are formed between the transmitting units and the metal floor so that the transmitting units can emit inclined wave beams. Phase regulation and control are carried out on the transmission array plane through a bifocus phase compensation method, and the bifocus phase compensation method comprises the steps that phase compensation values are calculated at the two virtual focuses respectively, and the average value is taken to serve as a compensation phase needed by an array plane unit. According to the invention, the emission unit with the inclined wave beam is adopted to regulate and control the amplitude of the emitted wave, and a bifocus phase compensation method is adopted, so that the phase error in the scanning process can be greatly reduced, and the scanning angle range is further expanded.

The application relates to the field of communication technology and discloses a high-gain medium vortex antenna, which comprises a feed horn antenna and a medium vortex lens; the feed horn antenna is used for generating a spherical wave; the hyperboloid of the feed horn antenna and the medium vortex lens is connected through an optical principle; the feed horn antenna is arranged at the focal point of the hyperboloid of the medium lens; the medium lens converges and collimates the spherical wave generated by the feed horn antenna to form a plane wave; the medium vortex lens transmits a stepped spiral structure to form a vortex electromagnetic wave; the vortex electromagnetic wave is designed according to a mode calculation formula of the vortex electromagnetic wave; theoretically, any required mode can be obtained; the vortex electromagnetic wave generated in this way has the characteristics of high power and is helpful to long-distance transmission in a wireless communication system. The high-gain medium vortex antenna has the advantages of high gain, high isolation and light weight.

Corrective meta surface lens is used to reduce the illumination and spill-over losses and improve the overall efficiency of a parabolic antenna when is horn-mounted, and / or top-mounted, and / or deposited directly on the frontal reflector surface of the parabolic antenna. For the horn-mounted model, a meta surface lens is placed in front of or in the aperture of the feed horn to reduce side lobe level, which results in lower parabolic antenna spill-over losses and overall efficiency improvement by more than 40% (1.5 dB). For the top-mounted model, the meta surface lens is mounted on top of (or above) the parabolic reflector, which results in reduction in illumination losses, and greater than 70% (2.5 dB) efficiency. The meta surface lens has a wideband response, is lightweight and has a lattice structure which makes it a great candidate for withstanding wind forces.

The application discloses a kind of ultra-low profile high-gain circularly polarized folded transmission array antennas with low radar scattering cross section, including the chessboard type arrangement of PCM array, transmission array, reflecting array and feed horn;The chessboard type arrangement of PCM array is placed on transmission array, and the two are separated by air layer 1;The transmission array is placed on reflecting array, and the two are separated by air layer 2;The reflecting array center opens a rectangular hole, and the feed horn is placed in the rectangular hole and embedded.The folded transmission array antenna of the application has the wideband high-gain circularly polarized radiation performance, and the radar scattering cross section reduction of out-of-band double frequency.

The application discloses a hole bottom processing structure of a feed horn, and relates to the technical field of deep space exploration, weather measurement and satellite remote sensing.The hole bottom processing structure comprises a horn body and a ring-shaped assembly part, and a plurality of corrugated grooves with different diameters are formed in the horn body; a mounting block is arranged on one side of the horn body close to the hole bottom, a mounting cavity is formed in the mounting block, and one side of the mounting cavity is connected with the inside of the horn body. The ring-shaped assembly part is mounted in the mounting cavity, and the ring-shaped assembly part comprises first circular blocks and second circular blocks; five first circular blocks are arranged, the edges of adjacent first circular blocks are attached to each other, and the first circular blocks and the second circular blocks are fixed between the inside of the mounting cavity and the side wall of the mounting cavity through laser welding. The application avoids the problem that a tool cannot be deeply inserted into the hole bottom for processing due to the narrow hole in the horn by designing a split ring-shaped assembly part, and the effect of impedance mutation caused by uneven groove depth is eliminated by using a central hole with different diameters to form a continuous and uniform corrugated groove.

A microwave beam-forming antenna may include: a main reflector installed on one surface of an antenna body; an array feed horn installed on a center portion of the main reflector; a sub-reflector disposed to be spaced apart from the array feed horn on the main reflector; and a plurality of waveguide feeds respectively connected to a plurality of horn antennas arranged in the array feed horn.

The application discloses an optically transparent reflective array antenna and a preparation method thereof. The optically transparent reflective array antenna comprises, from top to bottom, a conductive unit array, a dielectric substrate and a conductive ground plate. The conductive unit array comprises a plurality of reflective array units. Each reflective array unit comprises three concentric circular metal thin wires, namely a first circle, a second circle and a third circle from outside to inside. The second circle and the third circle are connected by four center-symmetrical metal thin wires to form a circular ring structure. The length of the metal thin wire is fixed, and the radius of the first circle and the second circle is adjusted to realize the adjustment of the reflection phase. The finally assembled antenna array is excited by a feed horn to realize good performance of high gain, high efficiency and large bandwidth, while good visible light transparency is maintained. The technical problems of small phase shift range, large loss, narrow antenna operating bandwidth and low efficiency of the traditional optically transparent reflective array antenna unit are solved.

The invention discloses a monopulse feed source structure for a radar. The feed source structure comprises a monopulse horn, a coupler waveguide section and a comparator section from one end to the other end, the monopulse horn, the coupling waveguide section and the comparator section are all of a tailor-welded structure, every two adjacent sections are connected through a connecting flange plate, the flange plates are connected through pin positioning and screw connection, and a sealing rope is installed between the two flange plates. The production process of the parts is simple, so that the parts are easy to process and produce, and the processing precision of the feed source horn can be effectively ensured.

Disclosed is a feedhorn. The feedhorn provided in a multi-band antenna using a coaxial waveguide comprises: the coaxial waveguide including a first waveguide that is provided on one side of a reflector and allows a first band signal to pass therethrough and a second waveguide that shares the same axis with the first waveguide, has a larger diameter than the first waveguide, and allows a second band signal to pass therethrough; and a dielectric that is provided between the coaxial waveguide and a sub-reflector on one side of the coaxial waveguide and protrudes radially with respect to the axis of the coaxial waveguide.

The invention discloses a transmission array antenna based on SIW slot coupling magnetoelectric dipoles. The transmission array antenna comprises an antenna array formed by periodically arranging antenna units, and a feed source horn arranged at the bottom of the antenna array. Each antenna unit comprises two linearly polarized magnetoelectric dipole patch layers and an SIW transmission layer located between the two linearly polarized magnetoelectric dipole patch layers, and the transmission phase of the transmission array antenna is adjusted through the transmission phase of the SIW transmission layer. According to the invention, the transmission characteristics of the SIW are utilized, and the length of the SIW transmission line is changed by changing the positions of part of the metal through holes, so that the transmission phase of the SIW is changed, and finally the transmission phase of the transmission array unit is changed. Through simulation verification, the transmission array antenna has the advantages of high gain and wide bandwidth, and can be applied to millimeter waves.

The application provides a double circular polarization independent scanning reconfigurable reflectarray antenna, and relates to the technical field of antenna engineering, and comprises a feed horn antenna and a reconfigurable double circular polarization reflectarray surface, wherein the reconfigurable double circular polarization reflectarray surface comprises periodically arranged reconfigurable reflecting units; each reconfigurable unit can generate independent phase responses for left-handed and right-handed circular polarization incident waves. Through the control of the spatial distribution of the state of the reconfigurable unit at the array level, double circular polarization independent beam scanning can be realized. The application realizes independent scanning of double circular polarization, can independently control the reflection phase of left-handed and right-handed polarization, generates an adjustable phase distribution on the array aperture, and realizes beam scanning. A same-frequency double circular polarization integrated scheme is realized, and two communication channels share one antenna aperture. The two generated beams do not interfere with each other, can be independently scanned, and can transmit signals respectively.

Some embodiments of the invention provide Pulse Doppler Polarimetric radars that are configured in a manner to eliminate traditional components that contribute to the high system cost, the overall weight and the low reliability of the radars. In some embodiments, each radar includes a (1) a beam steering walking splash plate with positioning actuator(s), (2) a feed horn antenna with wave guide assembly, (3) a parabolic reflector, (4) radar electronic components, and (5) radome and mounting bracket(s). The feed horn antenna, parabolic reflector, and wave guide assembly (including a signal generator) are stationary with respect to each other in some embodiments.

The invention discloses a low-profile dual-linear polarization convex conformal transmission array antenna, which comprises a conformal transmission array and a feed horn, the transmission array comprises a plurality of transmission units; each transmission unit is composed of a metal patch, a dielectric substrate, a metal patch, a dielectric substrate and a metal patch which are tightly attached in sequence; the top layer metal patch and the bottom layer metal patch are of a square ring groove type structure, and the middle layer metal patch is of an up-down and left-right symmetrical structure and comprises a circular metal patch and a rectangular metal patch extending out of the middle of the bottom of the rectangular groove, and rectangular grooves are dug out of the two ends of the circular metal patch in the two directions of the horizontal center shaft and the vertical center shaft. According to the convex conformal transmission array antenna, within an electromagnetic wave incident angle of 50 degrees, the transmission amplitude of the transmission units is within-3dB, the phase of the transmission units can linearly and continuously change, and the convex conformal transmission array antenna formed by the transmission units can realize dual-linear polarization high-aperture efficiency transmission.

An unitary one-piece construction feed for a high frequency band antenna, the feed including: a feed horn; and a polarizer comprising a void and multiple sets of ridges disposed in the void, wherein the polarizer is in direct contact with the feed horn and the unitary one-piece construction feed is capable of operating with a carrier signal ranging across one or two consecutive bands selected from Ku, K, Ka and Q bands, for example, from 17.3 GHz to 31 GHz.

An antenna assembly configured to steer a radio frequency (RF) signal to a focus area offset from an azimuth center. The antenna assembly includes a feed horn defined by a conductive top plate between an inner surface and an outer surface of the plate. The feed horn is aligned with a waveguide. A step is defined by the conductive top plate extending from a surface of the feed horn towards the focus area. The step is configured to steer the RF signal to emanate from the outer surface of the conductive top plate towards the focus area.

This invention relates to a frequency-selective surface-based active-passive composite broadband antenna device for use in radio systems such as radar and communications. It is characterized by comprising a cavity-backed 94GHz millimeter-wave antenna loaded with an FSS and a broadband conformal Vivaldi antenna array. The broadband conformal Vivaldi antenna array adopts a cylindrical conformal heel-to-heel Vivaldi antenna form, using a metal cylindrical surface as the mounting carrier for the Vivaldi antenna array, which provides physical support and electromagnetic shielding. The cavity-backed 94GHz millimeter-wave active antenna loaded with an FSS consists of a parabolic rotating surface, a feed horn, a rectangular enclosed metal cavity, and a high-pass FSS mechanism. The rectangular enclosed metal cavity provides electromagnetic isolation between the active antenna and the broadband passive antenna array, confining the near-field electromagnetic field of the parabolic rotating surface within the metal cavity, while the effective radiated field is radiated out through the top FSS. The high-pass FSS mechanism uses a square aperture FSS for high-pass spatial filtering.

The application relates to the technical field of antennas, in particular to a 3D printing linear polarization conversion circular polarization scanning antenna, which comprises a phase gradient metasurface, a linear polarization conversion circular polarization metasurface lens and a feed horn antenna arranged in a coaxial line from top to bottom and not in contact with each other in sequence, the phase center of the feed horn antenna is located on the focal point of the linear polarization conversion circular polarization metasurface lens, and the phase gradient metasurface and the linear polarization conversion circular polarization metasurface lens rotate in opposite directions along the same axis. The application realizes two-dimensional beam control through the phase gradient metasurface and the linear polarization conversion circular polarization metasurface lens, so that the application has good beam scanning performance and high electromagnetic wave conversion efficiency, has the characteristics of high gain and low scanning loss, and is formed by adopting the 3D printing technology, so that the production cycle and cost are greatly shortened, precise control of the antenna radiation mode can be realized, and the application can be widely applied in the fields of communication, radar and satellite.

The application relates to an antenna for realizing quasi-non-diffracting beam shaping and scanning, which comprises a phase shift super surface and a feed horn antenna, and the feed horn antenna is opposite to the center of the phase shift super surface; the phase shift super surface is a double-layer dielectric substrate structure with an electromagnetic wave phase shift function, and the whole phase shift super surface is composed of a plurality of periodically arranged phase shift units; the structure of each phase shift unit comprises upper, middle and lower three layers of metal patches and upper and lower layers of dielectric substrates; the phase shift unit is equivalent to a low-pass filter phase shifter with a phase shift effect; by setting the size of the three layers of metal patches in each phase shift unit on the phase shift super surface, different angle insertion phase shifts can be realized at any position of the phase shift super surface; and then under the irradiation of the feed horn antenna, a phase distribution meeting the ideal phase shift quantity of the quasi-non-diffracting beam can be generated on the outlet surface of the phase shift super surface, so as to generate the quasi-non-diffracting beam. The application solves the uncontrollable problem of the starting point of the non-diffracting area of the quasi-non-diffracting beam.