15 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 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 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.

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 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 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.

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.

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.

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.