40 results about "Antenna aperture" patented technology

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.

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 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.

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.

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 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.

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 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.

The present disclosure provides a sensor assembly for non-invasive temperature measurement using microwave radiometry. The assembly comprises a circuit board with a thermistor, capacitor, and inductor, where the inductor electrically isolates microwave signals from temperature sensing signals. A coaxial connector is positioned at one end of the circuit board with an antenna aperture at the opposite end. A shield layer extends over the circuit board with a sensor region, transition region, and extended region that are offset from the circuit board components. The shield layer is oriented at an angle relative to the circuit board. The inductor utilizes parasitic capacitance to improve antenna impedance matching, while the capacitor provides microwave signal isolation for the thermistor to prevent interference with signal detection.

The embodiment of the invention discloses a target detection method and device, electronic equipment and a medium. The method comprises the following steps: determining the position of a fixed transmitting antenna arranged in a transmitting antenna aperture and the position of a fixed receiving antenna arranged in a receiving antenna aperture based on a preset number of virtual uniform antennas, so as to form a virtual uniform array based on the fixed transmitting antenna and the fixed receiving antenna; and optimizing the positions of other transmitting antennas in the transmitting antenna aperture and the positions of other receiving antennas in the receiving antenna aperture to form a sparse array based on all transmitting antennas and all receiving antennas, and performing target detection according to the virtual uniform array and the sparse array. According to the scheme, the virtual uniform array can be formed in the sparse array of all the virtual antennas, the main lobe and side lobe ratio is improved through the virtual uniform array, the accuracy of roughly measuring the azimuth during target detection is improved, and the angle measurement precision and the angle measurement resolution can be improved through the sparse array, so that the accuracy of target azimuth angle detection is improved.

An antenna having a radio frequency (RF) radiating antenna element with a static capacitor is described. In some embodiments, the antenna includes an RF signal source and a plurality of radio frequency (RF) radiating antenna elements coupled to the RF signal source, each of the RF radiating antenna elements comprising a slot, a tuning element coupled to the RF signal source for tuning the slot as part of the RF radiating antenna element that generates a beam, and a fixed capacitor coupled to the RF signal source and coupled in series with the tuning element across the slot, the fixed capacitor for mitigating harmonic generation to control the linear response of the plurality of radio frequency (RF) radiating antenna elements.

The embodiment of the invention provides a construction method and device of a phased-array antenna system and the phased-array antenna system.The method comprises the steps that performance constraint conditions and working parameters are obtained, the performance constraint conditions comprise the beam space dispersion precision requirement and the time dispersion precision requirement, and the working parameters comprise the beam space dispersion precision requirement and the time dispersion precision requirement; the working parameters comprise a working bandwidth, an antenna aperture and a maximum scanning angle; determining the network stage number of the delay network, and determining the number of delay units corresponding to each stage of subarray network in the delay network according to the performance constraint condition, the working parameters and the network stage number; and generating a multi-stage delay network according to the number of delay units corresponding to each stage of sub-array network, and integrating the multi-stage delay network with a plurality of antenna units to obtain the phased-array antenna system. Therefore, the phased-array antenna system has a hardware basis of cooperative work under a broadband wide-scanning condition, and engineering realizability and cost controllability are considered while high-precision beam forming and dispersion compensation can be realized.

The invention provides a dual-frequency dual-polarization common-aperture phased-array antenna unit. The dual-frequency dual-polarization common-aperture phased-array antenna unit comprises a plurality of layers of dielectric substrates, the low-frequency-band dielectric resonator antenna and the four high-frequency-band dielectric resonator antennas are arranged on the multilayer dielectric substrate; wherein the low-frequency-band dielectric resonator antenna and the high-frequency-band dielectric resonator antenna are conformally arranged in the same physical aperture of the multi-layer dielectric substrate, and the low-frequency-band dielectric resonator antenna and the high-frequency-band dielectric resonator antenna are both dual-polarized antennas. According to the invention, the dual-frequency-band simultaneous independent operation and dual-polarization radiation in a compact space are realized, the utilization efficiency of the antenna aperture is obviously improved, the technical bottleneck that the dual polarization and broadband are difficult to realize at the same time in high and low frequency bands in the traditional common-aperture antenna is overcome, and the dual-polarization broadband antenna has the advantages of low loss and high radiation efficiency by means of the characteristics of the dielectric resonator antenna. And a high-performance and high-integration-level miniaturized antenna unit solution is provided for a multifunctional composite phased array radar system.

The application provides a shared-aperture dual-mode orbital angular momentum vortex wave antenna design method, designs a patch antenna unit meeting working frequency band requirements, forms two annular antenna arrays by using the patch antenna unit, and makes the two annular antenna arrays intersect to form a staggered arrangement and share the same antenna aperture; the two annular antenna arrays are respectively designed to have a respective feed network, so that the feed signals between the array units meet the phase difference of a target orbital angular momentum; the positions of the feed points in the two feed networks are determined, a coaxial line is introduced for feed, and a dual-mode orbital angular momentum vortex wave antenna is formed; through the staggered arrangement of the two uniform circular ring arrays and the fine design of the feed network, dual-mode OAM vortex wave generation in the same frequency band and the same polarization direction is realized. The application introduces a new OAM freedom degree on the basis of not increasing the antenna aperture, and has broad application prospects in the fields of large-capacity communication, radar target detection and imaging, etc.

The invention discloses a radome sidelobe lifting calculation method and system based on an equivalent radiation source, and belongs to the technical field of large ground radar radomes. Fitting a directional diagram gain and a beam width index according to a known antenna aperture size and a working frequency; compiling a current distribution function of the antenna aperture, and setting the current distribution of the antenna aperture to enable the antenna aperture to reach a sidelobe level meeting requirements; calculating current amplitudes of different side lobe levels according to the simulated and evaluated antenna side lobe levels and antenna aperture size requirements; introducing the generated antenna aperture current amplitude distribution into an antenna array element, and generating an antenna array far-field directional diagram; in addition, an antenna housing model is modeled in full-wave simulation software, an antenna far-field pattern conforming to gain, beam width and sidelobe level indexes is loaded as an excitation source, combined electrical performance simulation of the antenna and the antenna housing is carried out, and theoretical performance indexes are verified. The method and the device are used for solving the problems of accuracy, efficiency and availability of antenna housing electrical performance simulation.

A position, navigation, and timing (PNT) system, a satellite terminal and methods for using the same are disclosed. In some embodiments, a satellite terminal includes an antenna aperture and a computing device. The computing device is operable to execute an inversion algorithm to derive a location of the satellite terminal. This can be used when an external reference to its location is not available. The satellite terminal also includes a transcoder to create a transcoded signal using the location and a modem communicably coupled to the transcoder and the antenna aperture to receive the transcoded signal.

The invention relates to an antenna structure (100) for a vehicle radar system with distributed radar antennas (140, 150, 160), wherein the radar antennas (140, 150, 160) comprise separately configured transmitting antennas (150, 150-n) and receiving antennas (160, 160-n), wherein the transmitting antennas (150, 150-n) and receiving antennas (160, 160-n) are each spaced apart from one another along a spatial direction (330), wherein the receiving antennas (160, 160-k) arranged and spaced apart from one another along the one spatial direction (330) have a distance transverse to the one spatial direction (330) from transmitting antennas (150, 150-n) arranged adjacent with respect to the one spatial direction (330), which are spaced apart from one another along the one spatial direction (330). are arranged at a distance from each other.

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.

A position, navigation, and timing (PNT) system, a satellite terminal and methods for using the same are disclosed. In some embodiments, a satellite terminal includes an antenna aperture and a computing device. The computing device is operable to execute an inversion algorithm to derive a location of the satellite terminal. This can be used when an external reference to its location is not available. The satellite terminal also includes a transcoder to create a transcoded signal using the location and a modem communicably coupled to the transcoder and the antenna aperture to receive the transcoded signal.

Phased array antenna systems and methods implemented in connection with a beam former enabling multiple signals to be transmitted from a single phased array antenna are provided. The beam former includes at least one beam former unit for each element of the phased array antenna. In a two beam implementation, each beam former unit includes a first input terminal, a first amplifier, a second input terminal, a second amplifier, and an asymmetric combiner having a first input connected to an output of the first amplifier, a second input connected to an output of the second amplifier, and an output connected to the antenna element. An amount of loss imparted to a first signal passed from the first input to the output is less than an amount of loss imparted to a second signal passed from the second input to the output.

This application relates to the field of wireless communication technology and discloses a multi-mode integrated vehicle antenna communication system adapted to intelligent driving, comprising: a radio frequency aperture and optical-to-radio frequency conversion module for forming a radio frequency aperture and performing bidirectional conversion between radio frequency signals and optical signals; a central processing and control module for generating beamforming parameters in communication mode to control the radio frequency aperture and optical-to-radio frequency conversion module; a physical state sensing module for analyzing the phase change of the returned optical signal in the detection link to obtain physical state change information of the radio frequency aperture; and an adaptive beam compensation module for calculating compensation parameters based on the physical state change information. This invention, through a closed-loop self-calibration mechanism composed of built-in physical state sensing and adaptive compensation, can offset the influence of physical changes in the antenna aperture in real time during dynamic vehicle operation, ensuring high pointing accuracy of the communication beam and stability of link performance.

The application discloses a signal processing method, a sidelobe suppression method and system for a sparse array antenna, splits a main subarray into multiple smaller subarrays, respectively performs beam forming spectrum calculation, performs normalization processing on the spectra, and reconstructs a beam forming spectrum by taking a minimum value at each angle, in the embodiment of the application, by using the characteristics that different subarrays are sensitive to different degrees of sidelobes at different angles, a lower relative sidelobe level is realized on a new angle spectrum, and the sidelobe level is effectively suppressed; meanwhile, each subarray retains the first element and the last element of the corresponding main subarray, the high level of the main lobe and the consistency of the antenna aperture are maintained, and therefore the angle resolution is unchanged.

An antenna, comprising a radiator. The radiator comprises a first metal layer and N feeding structures, the first metal layer being coupled to the N feeding structures; the first metal layer satisfies circular symmetry; the N feeding structures are in one-to-one correspondence with N ports, and each feeding structure is used for the corresponding port to transmit a signal to the radiator, where N is an integer greater than or equal to 3; the N feeding structures comprise one first feeding structure and M second feeding structures, where M is an integer less than N and greater than 1; the distance between the projection of the first feeding structure on the first metal layer and the geometric center of the first metal layer is less than or equal to a first threshold; the M second feeding structures surround the first feeding structure, and the arrangement of the M second feeding structures satisfies circular symmetry; and the N feeding structures form a circularly symmetrical structure. The antenna provided by the present application can improve spectral efficiency and reduce interference between multiple users within a limited antenna aperture.

The application discloses a Ka-band GEO satellite ground station antenna single-pulse tracking control method and belongs to the field of satellite communication ground station antenna tracking control. The application comprises the following steps: connecting an antenna servo device with a single-pulse tracking receiver to obtain the directional sensitivity parameters of a single-pulse tracking system; calculating and setting the judgment threshold of tracking control according to the antenna aperture and tracking frequency points; establishing three arrays with a length of n to store the azimuth error voltage Ua, the elevation error voltage Ue and the total error voltage U respectively; starting the single-pulse tracking; collecting the azimuth error voltage and the elevation error voltage in real time, obtaining the total error voltage U according to the calculation, and performing single-pulse tracking control according to the evaluation error V and the judgment threshold. The application can automatically switch to other tracking modes before the single-pulse tracking fails, can solve the problem that the antenna single-pulse tracking deviates from the satellite main beam due to the deterioration of cross-coupling, and improves the reliability of antenna tracking.

Provided are a method and device for sensing, the method assisting a first device to sense a second device through a communication capability between the first device and the second device, the first device sensing the second device for multiple times when there is a relative motion between the first device and the second device, meanwhile, the positioning information of the second device associated with multiple sensing moments is obtained based on the communication capability between the first device and the second device, and the method equivalently expands the antenna aperture of the first device, so that the sensing precision of the first device on the second device in the direction perpendicular to the distance direction is effectively improved.