88 results about "Antenna aperture" patented technology

The invention relates to a microwave wireless energy transmission reflector antenna fast multi-objective optimization method comprising the following steps: establishing an MWPT system simulation model, adopting a Bernstein polynomial basis function to carry out dimension reduction processing on a decision space of an antenna, and reducing the number of decision variables; expressing the constructed MWPT system transmitting antenna optimization model as a multi-objective optimization model through a multi-objective optimization function; constructing an agent model based on Gaussian process regression GPR; a proxy model and an evolutionary strategy are integrated through a Gaussian process regression proxy model and a covariance matrix adaptive evolutionary algorithm, a non-dominated solution set is obtained through iterative optimization, and then the multi-objective design of reflector antenna aperture illumination is optimized. According to the method, three performance indexes of BCE, PRL and APC are comprehensively considered, the Bernstein polynomial basis function is adopted to carry out dimension reduction processing on the antenna design decision space, the number of antenna design decision variables is effectively reduced, the proxy model is introduced into the antenna optimization design method, and the optimization design efficiency is improved.

A transmitter system comprises a mapper configured to map data bits and power information to multiple subcarriers, producing mapped information. A first-level modulator converts this mapped information into subcarrier specifications, each defined by a complex number indicating amplitude and phase. The system includes multiple data stream / power channel digital paths, each with a frequency selector that processes a portion of the subcarrier specifications. An orthogonal subcarrier generator translates these specifications from frequency to time domain, generating baseband real and imaginary signals. A second-level modulator processes these signals with intermediate-frequency sine and cosine waves to produce IF I and IF Q signals. A beamformer modifies the phase and / or amplitude of these signals across multiple antenna channels, creating directed signals. Finally, a combiner adds output signals from each data stream / power channel digital path, directing them to corresponding antenna channel modules, facilitating efficient transmission across multiple channels.

An antenna and an antenna system that has the antenna, and relates to the field of wireless communication technologies. The antenna can allow a high frequency to pass through and block a low frequency or allow the low frequency to pass through and block the high frequency, and can be used in combination with other antennas to form an antenna system. In addition, in the antenna system, the antenna can also share a same antenna aperture surface with other antennas. The antenna can reduce costs while meeting a working requirement of a multi-band antenna, and can be used for flexible and changeable usage scenarios.

The embodiment of the application provides an antenna system and an electronic device, wherein the antenna system comprises a first antenna and a second antenna, the first antenna comprises a first radiator and a second radiator, and the second antenna comprises a first radiator and a third radiator; two ends of the first radiator are electrically connected to a ground plane respectively, a first end of the second radiator and a first end of the third radiator are relatively far away from each other and are connected or coupled to the first radiator respectively, a second end of the second radiator and a second end of the third radiator are oppositely arranged and form a gap, the antenna system feeds the first antenna through a first feeding connection point on the second radiator and feeds the second antenna through a second feeding connection point on the third radiator, a brand-new antenna system is constructed, high isolation between the first antenna and the second antenna can be realized, and meanwhile, miniaturization of an antenna aperture and a low SAR value can be realized.

A holding bracket (170) adapted to retain a radar transceiver (130) that comprises an antenna arrangement (131) having an antenna aperture plane (132) that has a vertical extension (V) and a horizontal extension (H). The holding bracket (170) is divided into an upper part (170A) and a lower part (170B), where the lower part is adapted to be positioned closer the ground (G) than the upper part (170A). The lower part (170B) comprises a microwave energy absorbing part (180) that is adapted to prevent reflected microwave energy (R2) from radiating towards the ground (G), the microwave energy absorbing part (180) comprising a bottom end (181) that is positioned farthest from the upper part (170A), and a top end (182) that is positioned closest to the upper part (170A). The microwave energy absorbing part (180) is adapted to extend between the bottom end (181) and the top end (182) mainly parallel to the vertical extension (V) of the antenna aperture plane (132) when the radar transceiver (130) is mounted.

The invention relates to a photonic radar system (100) and a method for operating a photonic radar system (100). The invention further relates to a central unit (10) and a method for operating the central unit (10). The invention relates to reducing the computational effort required for Doppler processing in sparsely distributed antenna apertures by incorporating uniform linear array (ULA) structures (70).

The disclosure provides an example charging nest for wireless power transfer to drones is disclosed. The charging nest includes (a) a housing having an opening at a first end, (b) a plurality of antennas arranged around a periphery of the housing with each antenna aperture arranged facing a center of the housing, where each of the plurality of antennas has a director, an exciter, and a plurality of reflectors, and (c) a plurality of transmitters or transceivers each electrically coupled to a corresponding exciter of the plurality of antennas.

The present invention discloses a miniaturized space-ground laser communication terminal based on single-photon detection technology, belonging to the technical field of optical communication devices. It consists of 7 optical paths, namely the observation and reception optical path A, the signal transmission optical path B, the near-infrared beacon reception optical path C, the short-wave infrared beacon reception optical path D, the single-photon signal reception optical path E, the single-photon beacon reception optical path F, and the beacon transmission optical path G. These optical paths jointly complete the transceiver and detection of beacon light / signal light of single-photon / non-single-photon respectively. This terminal can be used for space-ground laser communication. Compared with traditional space-ground laser communication terminals, the antenna aperture is reduced to 20-30% of the original, the volume is only 20% of that of traditional space-ground terminals, and the weight can be reduced by 80%. At the same time, it can not only complete space-ground transmission, but also be compatible with the ground-to-ground point-to-point laser communication ability, greatly expanding the use range of laser communication ground stations, and can be widely used in air-ground, space-ground, deep space, and ground-to-ground point-to-point laser communication.

The application discloses a GIS built-in cut-off waveguide gas-permeable electromagnetic shielding multiplex composite sensor and belongs to the technical field of power equipment state monitoring. The PCB antenna board has a radiation unit facing the air chamber and a grounding plate facing away from the air chamber; the metal shell and the grounding plate enclose a shielding cavity; a MEMS gas sensing module is arranged in the shielding cavity; a cut-off waveguide type gas-permeable hole is formed in the side wall of the metal shell, and the aperture and the hole depth satisfy the electromagnetic wave cut-off condition; a selective gas-permeable protective window is arranged on the air chamber side of the cut-off waveguide type gas-permeable hole and comprises an ePTFE gas-permeable film allowing gas molecules to permeate and blocking particles and liquid water. The application realizes the simultaneous monitoring of partial discharge, temperature, humidity, pressure and decomposition products in a single installation hole, breaks the inherent trade-off between shielding safety and response speed in the existing composite sensor, solves the problem of long-term gas compatibility and performance degradation of the sensitive surface, and eliminates the occupation of the shielding structure on the antenna aperture.

The present application relates to the technical field of vibration test, aiming at solving the problem that the existing vibration fixture without adaptive built-in antenna cannot adapt to special-shaped built-in antenna and cannot simulate the support stiffness and real dynamic boundary conditions in the antenna aperture, and provides a closed flexible vibration fixture and a vibration test method thereof, which comprises a bottom plate, a reinforcing plate, a side plate, a mounting plate, an upper cover plate, a lower cover plate, a rubber plate and an adapter block; the bottom plate is provided with a plurality of fixing holes; the mounting plate is provided with a built-in antenna; the rubber plate comprises an upper rubber plate and a lower rubber plate; the upper cover plate and the upper rubber plate are respectively provided with a first rectangular groove and a second rectangular groove at the same position; the adapter block is located in the first rectangular groove and the second rectangular groove and is bonded to the upper surface of the built-in antenna; and the remaining surfaces of the adapter block are bonded with acceleration sensors.The present application has the beneficial effects of accurately simulating the real working environment of the built-in antenna, adapting to special-shaped part test, being stable in structure, being faithful in energy transmission, directly monitoring the response and adapting to multiple working conditions, and improving the test accuracy.

In one embodiment of the present disclosure, a housing for an antenna system having a plurality of antenna elements defining an antenna aperture includes a chassis portion having an internal support portion for internal components for the plurality of antenna elements including a bonding portion for bonding an antenna stack assembly to the chassis portion, and a radome portion configured for coupling to the chassis portion to define an inner chassis chamber.

The invention discloses a dielectric logging antenna assembly of a multi-frequency-point matching network. According to the dielectric logging antenna assembly, a medium matching layer is installed on a metal pressure-bearing shell; the transmitting antenna and the receiving antenna are arranged in the metal pressure-bearing shell; the transmitting antenna and the receiving antenna are externally connected to a transmitting or receiving circuit of the logging instrument at the same time. According to the invention, the transmitting antenna and the receiving antenna can be effectively protected from being influenced by liquid in a well in an underground high-pressure environment. Meanwhile, the dielectric matching layer can provide pressure-bearing sealing for the antenna aperture and ensure that an electromagnetic wave radiation channel is formed between the antenna and the stratum. The antenna radiation impedance and the radio frequency circuit impedance can be effectively matched through the antenna radiation metal body, the metal pole plate via hole, the antenna feed port, the insulating dielectric layer and the metal pole plate, so that the radiation and signal receiving efficiency of the antenna is effectively improved.

An antenna device includes a polarization conversion unit in which a conversion space is formed to propagate radio wave. A first waveguide extends from the conversion space to one side in a longitudinal direction, and a second waveguide extends from the conversion space to the other side in the longitudinal direction. The first waveguide is extended in a height direction in a cross-section perpendicular to the longitudinal direction, and a second waveguide is extended in a width direction in the cross-section. Plural antenna apertures are connected to the second waveguide.

The present invention relates to a two-dimensional radar guidance beacon structure suitable for large-aperture antenna loads. The beacon comprises a base, an inner ring frame, an outer ring frame, an inner ring reducer assembly, an outer ring reducer assembly, a cam bearing for outer ring support, an inner ring potentiometer, an outer ring potentiometer, an inner ring gyroscope, an outer ring gyroscope, and the like. The present invention shifts the outer ring support position from the traditional rotation axis to the concentric radius of the rotation axis, employing cam bearings to achieve outer ring support, thereby increasing the antenna outer ring scanning angle range and antenna aperture. Furthermore, the radial dimension of the inner ring support is minimized, allowing the antenna to be as close as possible to the antenna's rotation center, thereby increasing the antenna aperture. Finally, the transmission components and angle measurement components of the inner and outer rings are moved downward as much as possible to free up space for the installation and rotation of the antenna load.

The present invention relates to a broadband, low-profile, co-aperture, multi-phase center array antenna, which belongs to the field of antenna technology and solves the problems of low antenna aperture utilization and excessive antenna size in the prior art. The present invention comprises: a waveguide sub-array antenna unit, a circulator combination, and a feeding network; the feeding network is connected to a plurality of the waveguide sub-array antenna units via the circulator combination, a transmitting channel and a plurality of receiving channels are provided on the feeding network, and the receiving sub-arrays are arranged at equal intervals to form a multi-phase center array antenna. The present invention can realize a broadband, low-profile design of the antenna, facilitate the layout of the feeding network to form multi-phase center sub-array multiplexing, improve antenna utilization, and reduce antenna volume.

The application discloses a low-cost phased array radio frequency front end, comprising: an array antenna, a radio frequency link 1, a radio frequency link 2, a feed network, a frequency conversion module and a control module. The array antenna comprises antenna units and antenna subarrays. Each radio frequency link 1 is connected with one antenna subarray, and each radio frequency link 2 is connected with one antenna unit. One antenna subarray comprises L antenna units. When the radio frequency front end works in a low frequency band f1-f3, the radio frequency link 1 and the radio frequency link 2 work simultaneously, all the antenna units connected with the radio frequency link 1 and the radio frequency link 2 work, frequency and aperture multiplexing are realized; when the radio frequency front end works in a high frequency band f3-f2, only the antenna units connected with the radio frequency link 2 work. The application takes into account the gain of the wideband radio frequency front end in the high and low frequencies, avoids the waste of antenna aperture resources, reduces the number of radio frequency channels, saves the cost and has a wide application prospect.

The invention relates to the technical field of wireless communication, and discloses a multimode integrated vehicle-mounted antenna communication system adaptive to intelligent driving, and the system comprises a radio frequency aperture and light-radio frequency conversion module which is used for forming a radio frequency aperture and executing the bidirectional conversion of a radio frequency signal and a light signal; the central processing and control module is used for generating beam forming parameters in a communication mode so as to control the radio frequency aperture and light-radio frequency conversion module; the physical state sensing module is used for analyzing the phase change quantity of a returned optical signal in the detection link so as to obtain the physical state change information of the radio frequency aperture; and the adaptive beam compensation module is used for calculating compensation parameters based on the physical state change information. According to the invention, through a closed-loop self-calibration mechanism formed by built-in physical state perception and self-adaptive compensation, the physical change influence of the antenna aperture can be counteracted in real time during the dynamic driving of the vehicle, and the high pointing precision of the communication beam and the stability of the link performance are ensured.

This application describes a single-layer wide-angle impedance matching (WAIM) and a method of using it. In one embodiment, the antenna includes: an aperture having a plurality of antenna elements operable to radiate radio frequency (RF) energy; and a single-layer wide-angle impedance matching (WAIM) structure coupled to the aperture to provide impedance matching between the antenna aperture and free space.

The invention provides a method for designing a dual-mode orbital angular momentum vortex wave antenna with a shared aperture, which comprises the following steps of: designing patch antenna units meeting the requirement of a working frequency band, forming two annular antenna arrays by the patch antenna units, and enabling the two annular antenna arrays to intersect to form a staggered arrangement layout and share the same antenna aperture; respectively designing respective feed networks of the two loop antenna arrays, so that feed signals among the array units meet the phase difference of the target orbital angular momentum; the positions of feeding points are respectively determined in the two feeding networks, a coaxial line is introduced for feeding, and the dual-mode orbital angular momentum vortex wave antenna is formed; through cross arrangement of two uniform circular ring arrays and fine design of a feed network, generation of dual-mode OAM vortex waves in the same frequency band and the same polarization direction is realized. On the basis that the aperture of the antenna is not increased, the OAM new degree of freedom is introduced, and the antenna has wide application prospects in the fields of high-capacity communication, radar target detection and imaging and the like.

The invention discloses a method for reconstructing the diffraction field of an antenna aperture face based on a similarity principle, comprising the following steps: step 1. enabling a probe to collect aperture face near field data; step 2. collecting aperture face field data; step 3. using a spatial convolution formula to perform convolution processing on the aperture face field data at two frequency points; step 4. using a data set as a similar data set providing complete interpolation information; randomly extracting part of the sampled data from the data set as a defective data set to be interpolated; performing feature division using a K-means and Voronoi cell division method; step 5. collecting data on a two-dimensional diffraction field at one of the frequency points; step 6. calculating a two-dimensional plane error and a correlation coefficient to obtain a relatively accurate reconstruction result, and the method can effectively save the plane near field test time and cost expenditure at a frequency point with data defect. The invention realizes the data reconstruction work of the aperture face diffraction field with data defect problems at different frequency points.

The present invention provides a method for designing a low-sidelobe waveguide slot antenna. First, the theoretical aperture field distribution of the antenna is obtained based on the number of antenna slots and the target sidelobe level. Next, the slot conductance function, i.e., the relationship between slot parameters and normalized conductance, is determined. Then, based on full consideration of the mutual coupling between different slot units in the array and array edge effects, the antenna aperture field distribution is made to approximate the theoretical aperture field distribution through several iterative designs, and the sidelobe level of the radiation pattern reaches the target, thereby achieving the design of a low-sidelobe waveguide slot array antenna. The antenna of the present invention can be a waveguide slot traveling wave array, a standing wave array, or the like, and the slot units can be either waveguide wide-side slot units or waveguide narrow-side slot units. The present invention is particularly suitable for the design of electrically large-sized waveguide slot array antennas, saving design time and improving design efficiency. The present invention can also be extended to the design of antenna arrays with arbitrary aperture field distributions.

The utility model discloses a miniaturized device of a high-precision unmanned aerial vehicle image transmission signal direction finding system. The miniaturized device comprises a detection direction finding antenna and a host. The detection direction-finding antenna comprises a low-frequency-band antenna unit, a high-frequency-band antenna unit, an antenna switching matrix, a radio frequency module and an electric compass; the low-frequency-band antenna unit and the high-frequency-band antenna unit are respectively connected with the antenna switching matrix, and the antenna switching matrix is connected with the radio frequency module; the host comprises a power supply module, an intermediate frequency acquisition board card and an embedded computer module; the intermediate frequency acquisition board card is connected with the embedded computer module and the power supply module; the detection direction-finding antenna is connected with the host through a control cable and an intermediate frequency cable. The direction-finding array adopts a directional antenna unit, so that the physical size of an antenna is smaller than an equivalent direction-finding aperture. Therefore, the constraint of the antenna aperture on the minimum size of equipment is broken, and the purpose of miniaturization is achieved.

A stacked resonant antenna array structure with a slow wave effect includes: an antenna unit layer, a metal ground unit layer and a feed unit layer arranged in sequence, wherein: a plurality of stacked resonant antenna subunits are arranged in parallel in the antenna unit layer, and the stacked resonant antenna subunits form an array along a straight line; a plurality of rectangular gaps are arranged on the metal ground unit layer to couple the signal to the stacked resonant antenna subunits; a coplanar waveguide, a strip line and a vertical switching structure therebetween are arranged in the feed unit layer. The present invention significantly improves the propagation constant of the rectangular resonant cavity in the vertical direction by arranging periodically arranged metal diaphragms inside the rectangular resonant cavity, thereby reducing the antenna aperture and making the antenna unit more compact. At the same time, by loading short branches on the metal feeder, the impedance matching of the stacked antenna unit is improved.

The application discloses a vortex beam generation method, device and electronic equipment. The method comprises the following steps: obtaining the radiation electric field of a multi-vortex beam of a holographic metasurface according to the antenna aperture field synthesis principle; determining the form of the holographic metasurface according to the radiation electric field of the multi-vortex beam; exciting a surface wave by using an antenna; and converting the surface wave into a multi-directional and multi-modal vortex beam by using the holographic metasurface with the form. The technical scheme of the application discards a complex feed network, overcomes the defect that an ultra-large profile caused by an air-fed array is difficult to integrate with other terminals, improves beam diffraction, and enhances the quality of orbital angular momentum communication.

The invention provides an antenna phase compensation method, device and equipment and a storage medium, and the method comprises the steps: obtaining the first antenna data of a radar antenna for a target in a far-field scene for each radar antenna; based on a target compensation phase corresponding to the first antenna data, compensating a phase in the first antenna data to obtain compensated first antenna data, the target compensation phase being determined based on a near-field compensation phase, a first distance and a second distance of the radar antenna in a near-field scene, the first distance is the distance between the center of an antenna aperture in the near-field scene and a corner reflector arranged in the near-field scene, and the second distance is the distance between the radar antenna and the center of the antenna aperture. According to the invention, the phase of the antenna can be compensated in a far-field scene.

The present application provides a communication apparatus, a base station, and a communication system. The communication apparatus comprises a plurality of channels and a plurality of antenna elements, the plurality of antenna elements are arranged in an array of m columns of antenna elements, and the m columns of antenna elements include p columns of antenna elements and q columns of antenna elements arranged in sequence. Any column of the p columns of antenna elements comprises at least one first subarray unit, and antenna elements in the first subarray unit are connected to one first channel. Any column of the q columns of antenna elements comprises at least two second subarray units, and antenna elements in the second subarray units are connected to one second channel. The number Kp of the antenna elements comprised in the first subarray unit and the number Kq of the antenna elements comprised in the second subarray units satisfy: Kp>Kq, a*Kp=b*Kq, a≠b, and a and b are positive integers, respectively. The antenna aperture is utilized to the maximum extent, the spatial degree of freedom is utilized to the maximum extent, and the maximum coverage and capacity gain of the communication apparatus are acquired.

The application provides a method and device for measuring and correcting antenna pointing deviation and sub-reflector servo error. The method comprises: obtaining focal plane field data by using a phased array feed placed on an antenna focal plane; determining an antenna aperture field corresponding to the current antenna pointing deviation and sub-reflector servo error according to the focal plane field data; obtaining pointing deviation and sub-reflector servo error information of the current antenna according to the antenna aperture field; and when any one of the pointing deviation value, the sub-reflector axial offset value, the sub-reflector lateral offset value and the sub-reflector tilt value is greater than or equal to the corresponding preset value, performing correction processing according to the pointing deviation and sub-reflector servo error information of the current antenna until the pointing deviation value, the sub-reflector axial offset value, the sub-reflector lateral offset value and the sub-reflector tilt value corresponding to the corrected pointing deviation and sub-reflector servo error information are all less than the corresponding preset value.

The invention provides a communication device, a base station and a communication system. The communication device comprises a plurality of channels and a plurality of antenna oscillators, the plurality of antenna oscillators are arranged in an array to form m columns of antenna oscillators, and the m columns of antenna oscillators comprise p columns of antenna oscillators and q columns of antenna oscillators which are arranged in sequence. Any column of antenna oscillators in the p columns of antenna oscillators comprises at least one first sub-array unit, and the antenna oscillators in the first sub-array unit are connected with one first channel. Any column of antenna oscillators in the q columns of antenna oscillators comprises at least two second sub-array units, and the antenna oscillators in the second sub-array units are connected with one second channel. The number Kp of the antenna oscillators included in the first sub-array unit and the number Kq of the antenna oscillators included in the second sub-array unit meet the following condition: Kpgt; kq, a * Kp = b * Kq, a is not equal to b, and a and b are respectively positive integers. The antenna aperture is utilized to the maximum extent, the spatial degree of freedom is utilized to the maximum extent, and the maximum coverage and capacity gain of the communication device are obtained.

Disclosed are embodiments of antenna assemblies for integration with aircraft lighting systems. The antenna assemblies in some embodiments include a ground plane, a patch antenna positioned on the ground plane, and a radome covering the patch antenna. The patch antenna and radome are configured as an annular ring for positioning around a light fixture received through a center opening through each of the ground plane, patch antenna, and radome such that the antenna assembly can mount and connect to the aircraft utilizing the light fixture aperture without the need for a separate antenna aperture.

Embodiments of the present application disclose an antenna and a terminal device, which improve the utilization rate of the antenna aperture on the premise of keeping the number of antennas unchanged, effectively save the internal space of the terminal device, and are beneficial to better stacking of the whole machine. The method of the embodiments of the present application includes: a first antenna, a second antenna, a third antenna, and a fourth antenna; the first antenna and the second antenna are designed with double feeding mouth to mouth; the first antenna uses inductive feeding, the second antenna uses capacitive feeding, the third antenna uses capacitive feeding, and the fourth antenna uses capacitive feeding or inductive feeding.