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35 results about "Cross polarization" patented technology

Antenna device and wireless transceiver comprising the same

A dual-resonant antenna device is provided, exhibiting improved impedance bandwidth, cross-polarization, and isolation, and is less susceptible to spurious surface wave excitation. More specifically, at least one antenna element and a resonant structure are provided on a non-conductive substrate, such that at least one continuous conductive sidewall of the resonant structure surrounds the one or more antenna elements, forming a resonant cavity filled with a dielectric material covering the one or more antenna elements. Each antenna element is used to excite a TM mode, while the dielectric material and size of the resonant cavity are selected such that the resonant structure is used to excite a TE mode. In a preferred embodiment, the TM mode is a TM 01 mode, and the TE mode is a TE 111 mode.
Owner:HUAWEI TECH CO LTD

A pair of antennas with high isolation and low cross-polarization level

ActiveCN115693122BRadiating elements structural formsAntenna earthingsFull waveCross polarization
The application discloses an antenna pair with high isolation and low cross polarization level, which comprises a first radiation patch and a second radiation patch arranged as two half-circle ring structures, and the first radiation patch and the second radiation patch are connected through a first branch and a second branch; the first radiation patch and the second radiation patch work in a full-wave mode; the first branch and the second branch are arranged to overlap the resonant frequencies under differential and common mode excitation of two feed ports, and good matching is ensured, so that the isolation of the first radiation patch and the second radiation patch in the band is effectively improved; through the above arrangement, the mode Q value under differential and common mode excitation is close to the same, and the first radiation patch and the second radiation patch can further have high isolation in a wider frequency range. In addition, by introducing a first short pin group and a second short pin group, the polarization current in the x-axis direction can be effectively weakened, and the cross polarization level is reduced.
Owner:SHENZHEN UNIV

Magnetoelectrical monopole antenna unit, magnetoelectrical monopole antenna array, antenna and device

The embodiment of the application provides a magneto-electric monopole antenna unit, a magneto-electric monopole antenna array, an antenna and equipment, and belongs to the technical field of wireless communication. The antenna unit comprises a first dielectric substrate, a monopole radiator, a microstrip feed line, a metal reflector plate, a short-circuit metal column and two ground patches. It generates an electric monopole mode through the monopole radiator excitation, and generates a magnetic monopole mode through the short-circuit metal column, the ground patch and the reflector plate, and the two modes work together to realize wideband radiation and widen the beam width. The coupled currents on the two ground patches produce two pairs of opposite electric field components in the far field and offset each other, thereby realizing low cross polarization. The array composed of multiple units is loaded with a metasurface above, which significantly improves the port isolation by introducing a reflection path opposite in phase to the original coupling path. The application solves the technical problem that it is difficult to simultaneously realize wide-angle scanning, low cross polarization and high isolation in a wide frequency band.
Owner:SOUTH CHINA UNIV OF TECH

A handheld drone jamming device to enhance jamming effect

ActiveCN224439022UPerpendicular polarizationCross polarization
This utility model relates to the field of drone jamming technology and discloses a handheld drone jamming device that enhances jamming effect. The handheld drone jamming device that enhances jamming effect includes a mounting plate, on which a first antenna array and a second antenna array are disposed. The first antenna array and the second antenna array are arranged crosswise. This utility model overcomes the shortcomings of existing vertically polarized antennas in drone countermeasures by adopting cross-polarized antennas, and significantly improves the countermeasures effect of jamming guns.
Owner:JIANGSU AIRSPACE FALCON SAFETY TECHNOLOGY DEVELOPMENT CO LTD

Dual-band microstrip antenna array with different feeding modes and design method thereof

ActiveCN116470303BParticular array feeding systemsAntenna arrays manufactureMicrostrip antenna arraySoftware engineering
The application discloses a dual-frequency microstrip antenna array with different feeding modes and relates to the technical field of antennas. The dual-frequency microstrip antenna array comprises N*N antenna array elements, each of the antenna array elements comprises four antenna units, the four antenna units are arranged in a 2*2 matrix form, and the four antenna units are fed in the same direction; in any four adjacent antenna array elements arranged in the 2*2 matrix form, the horizontal feeding directions of two adjacent antenna array elements in the vertical direction are the same, and the vertical feeding directions are opposite; the horizontal feeding directions of two adjacent antenna array elements in the horizontal direction are opposite, and the vertical feeding directions are the same. The antenna array is divided into four kinds of antenna array elements, and different feeding is conducted, so that cross polarization is greatly improved. Meanwhile, the reverse sparse array and the reverse amplitude weighting technology are adopted, so that the sidelobe of the gain pattern of the antenna is uniform, and the optimization of cross polarization and gain is realized.
Owner:ZHEJIANG XINGJITONG MICROWAVE TECH CO LTD

A broadband circularly polarized diplex feed network

ActiveCN115939750BAntenna arraysAntennas earthing switches associationPerpendicular polarizationBroadband
The application relates to a wide-band circularly-polarized duplex feed network in the technical field of satellite communication, in particular to a wide-band circularly-polarized duplex feed network which comprises three layers of metal layers connected by screws, a first waveguide cavity and a second waveguide cavity formed in the inside, and horizontal polarization ports and vertical polarization ports arranged on the three layers of metal layers for entering electromagnetic waves; a low-frequency left-circularly-polarized port and a low-frequency right-circularly-polarized port are arranged on the first waveguide cavity for outputting low-frequency linearly-polarized signals; a high-frequency left-circularly-polarized port and a high-frequency right-circularly-polarized port are arranged on the second waveguide cavity for outputting high-frequency linearly-polarized signals; the application can realize the functions of simultaneous transmission and reception, time-sharing transmission and reception, and left and right circular polarization; when used for single circular polarization, the corresponding cross-polarization ports are connected with loads, and at this time, the application is used as a single-rotation-direction antenna feed source; when used for double circular polarization, all the ports are connected with corresponding radio frequency channels.
Owner:AEROSPACE STELLAR SPACE TECH APPL CO LTD

Method for dual-polarized multiplexing and interference management in XL-MIMO using polarization characteristics

PCT designated stageWO2026142562A1Interference (communication)Software engineering
A method performed by a dual-polarized receiver comprising an extra-large multiple-input multiple-output (XL-MIMO) antenna array (110) with antenna elements (111) each selectively operating in two orthogonal states for receiving signals from a dual-polarized transmitter in a joint radar-communication system, wherein the dual-polarized transmitter transmits dual polarized signal for radar sensing and communication, wherein the joint radar-communication system comprises a polarization medium between the dual polarized transmitter (200) and the dual polarized receiver (100) that introducing polarization interference and cross-polarization interference to the dual polarized signal. It is characterized by grouping antenna elements (111) based on polarization shift, co-polarization power level and cross polarization power level.
Owner:T C ISTANBUL MEDIPOL UNIVERSITESI

A Physical Layer Key Generation Method and System Based on Polarization Reconfigurable Antenna

This invention discloses a physical layer key generation method and system based on a polarization-reconfigurable antenna, belonging to the field of wireless communication technology. The method includes: establishing a polarization channel model jointly considering polarization correlation, spatial correlation, and channel depolarization effects, and deriving a closed-form expression for the key generation rate; constructing a joint optimization problem of beamforming vector and PRA phase shift vector under base station transmit power constraints and antenna phase modulation constraints, with the goal of maximizing the key generation rate; solving the problem using an alternating optimization method to obtain the optimal beamforming solution based on the Rayleigh quotient and the analytical closed-form solution for polarization phase modulation jointly determined by the polarization channel correlation coefficient, inverse cross-polarization discrimination, and receiver polarization vector. This invention requires no additional RF link, has low hardware complexity, effectively mitigates performance loss caused by polarization mismatch, and significantly improves key generation efficiency and system security in complex polarization environments.
Owner:ZHENGZHOU UNIVERSITY OF AERONAUTICS

Methods, apparatus, equipment, and dielectrics for full polarization compensation of antennas and waveforms

ActiveCN117761641BDielectricRadar systems
This application relates to a method, apparatus, device, and medium for full polarization compensation of antennas and waveforms. First, the cross-polarization isolation and orthogonal waveform isolation of a simultaneous full polarization measurement radar system are measured and calculated. Then, the radar system is used to detect a target, and an estimate of the target's polarization scattering matrix is ​​obtained based on the echo results. Finally, a coefficient matrix is ​​constructed based on the isolation index, and this coefficient matrix is ​​used to compensate for the estimated polarization scattering matrix to obtain the true value of the target's polarization scattering matrix. By modeling and compensating for the radar system's polarization error, the accuracy of target PSM measurement is improved.
Owner:NAT UNIV OF DEFENSE TECH

Wide-band wave-transmitting / filtering radiation unit, shared-aperture antenna array, and communication device

A wide-band wave-transmitting / filtering radiation unit, a shared-aperture antenna array, and a communication device are disclosed. The radiation unit includes a radiation structure and a feed structure, where the radiation structure and the feed structure are coupled for feeding, so that the radiation structure radiates low-frequency electromagnetic wave signals outward; the radiation structure includes a radiator, and the radiator is loaded with a plurality of layers of surface periodic structures; when the radiation structure operates in a first mode, electromagnetic waves excited by a high-frequency radiation unit irradiates the radiation structure, and the radiator and the plurality of layers of surface periodic structures collectively form a non-resonant node spatial band-pass filter circuit with K resonant points and K null points; and when the radiation structure operates in a second mode, low-frequency electromagnetic waves excite the radiation structure by means of the feed structure, and units of the plurality of layers of surface periodic structures are excited by the radiator in a parallel manner to form an equivalent filter circuit. The present disclosure can improve radiation pattern distortion of a multi-band antenna, and enhance indexes such as antenna gain, out-of-band suppression, and a cross-polarization ratio.
Owner:SOUTH CHINA UNIV OF TECH +1

A wide-angle scanning millimeter wave array antenna structure

ActiveCN115548678BAngular scanSide lobe
The application relates to a wide-angle scanning millimeter wave array antenna structure, which comprises a plurality of antenna units arranged and connected at intervals, wherein the antenna unit comprises a first dielectric layer, a bonding layer and a second dielectric layer arranged in sequence from top to bottom, the top surface of the first dielectric layer is provided with a radiation patch layer, the second dielectric layer is provided with a coupling short circuit structure and a coupling feed structure which are symmetric about the center, and the antenna units are sequentially connected through anti-symmetrical neutral lines. Compared with the prior art, the coupling short circuit structure is adopted to reduce the vertical current component, thereby reducing the high cross-polarization component of the H plane, improving the radiation characteristics of the antenna unit; the coupling feed form is adopted to further reduce the size of the antenna unit, the spacing between the antenna units is reduced to reduce the sidelobe level when the beam is scanned to a large angle, and the wide-beam scanning capability of the array antenna is expanded; the asymmetric neutral line is used to improve the mutual coupling between the antenna units and reduce the mutual influence between the adjacent antenna units.
Owner:FUDAN UNIVERSITY

A high-polarization purity beamforming method based on auxiliary array polarization cancellation

PendingCN122158961AAntenna arraysAntenna couplingsRadarBeam polarization
The application discloses a cross-polarization cancellation high-polarization-purity beam forming method based on a rotating auxiliary array, belongs to the technical field of array antennas, and aims to solve the problems of low array antenna beam polarization purity, complex cross-polarization suppression algorithm and cross-polarization deterioration in large-angle scanning. The method is applied to an array antenna containing a main array plane and an auxiliary array plane, first, the cross-polarization of the central unit of the main array, the main polarization pattern value is taken as a reference, the total number of main array units is combined to calculate the main array cross-polarization field amplitude and determine the number of auxiliary units; then, the auxiliary array plane is arranged on the side of the main array, and the auxiliary array unit is 90 DEG polarized rotation relative to the main array unit; finally, the auxiliary array unit excitation amplitude is calculated, and the main beam pointing phase is matched, so that the cross-polarization field amplitudes of the two are the same, the phases are opposite, and the high-polarization-purity main beam is formed by superposition. The application has low cost, strong engineering realizability, good compatibility and adaptability to large-angle scanning, and is suitable for fields such as radars and communications.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA +1

Millimeter wave antenna, antenna array and electronic device

The application discloses a millimeter wave antenna, an antenna array and electronic equipment, and sets a first circuit board and a second circuit board on two sides of a wave-absorbing layer respectively; the first circuit board comprises a first radiation patch and a first dielectric substrate from top to bottom; the second circuit board comprises a second radiation patch, a second dielectric substrate, a first ground plate, a third dielectric substrate and a feed line from top to bottom, and a signal hole connecting the second radiation patch and the feed line is arranged; and a through groove is arranged on the wave-absorbing layer, so that energy of the second radiation patch can be coupled to the first radiation patch to the maximum extent. The wave-absorbing layer is arranged around the radiation patch, high-order modes generated by the ground plate on the second circuit board can be suppressed, and cross-polarization components of the millimeter wave antenna are reduced; meanwhile, the wave-absorbing layer is arranged to design the millimeter wave antenna in layers, the number of layers of the circuit board is reduced, the type of via holes is reduced, and the processing cost is reduced.
Owner:SHANGHAI AMPHENOL AIRWAVE COMM ELECTRONICS CO LTD

Sequentially rotating wideband high-gain circularly polarized antenna, conformal antenna and design method thereof

This invention discloses a sequentially rotating broadband high-gain circularly polarized antenna, a conformal antenna, and their design methods. The antenna comprises two stacked dielectric substrates, with a radiating structure disposed on the upper surface of the upper substrate. The radiating structure includes a circularly polarized core unit and parasitic patches arranged around it. Connecting patches within the core unit introduce a 90° phase difference between two adjacent sides of the closed-loop patch, exciting circularly polarized radiation and establishing a sequentially rotating phase difference coupling field on the periphery. The parasitic patches obtain coupled feeding through the coupling field to broaden the bandwidth and improve gain. Coupling patches are arranged oppositely between the upper and lower substrates to improve impedance matching. When using a flexible substrate, the antenna maintains broadband circular polarization characteristics and a stable radiation pattern even when bent. This invention achieves an impedance bandwidth of 5.1–7.29 GHz, an axial ratio bandwidth of 5.28–6.77 GHz, a peak gain of 12.14 dB, and cross-polarization below -15 dB, making it suitable for 5G / 6G communication and satellite communication systems.
Owner:XINYANG NORMAL UNIVERSITY

Enhanced systems and methods for synthetic aperture radar image compression with cross polarization prediction

A system and method for processing Synthetic Aperture Radar (SAR) data using cross polarization prediction. The system processes complex SAR data from two different polarizations, typically HH and VV, and stores their representations. A specialized reconstruction component then reconstructs data from the first polarization while utilizing the second polarization data as auxiliary information. This cross-polarization approach enhances the reconstruction process, leveraging complementary information from both polarizations to produce improved SAR imagery. The method can employ neural network-based compression and reconstruction techniques, adaptive processing based on SAR data characteristics, and sophisticated analysis of cross-polarization relationships. Advanced implementations may include interpolation between polarizations, extrapolation of polarization effects, and arithmetic operations on processed representations to further enhance the SAR data. This innovation enables the generation of high-quality, information-rich SAR images with potential applications in environmental monitoring, urban planning, agriculture, and disaster response.
Owner:ATOMBEAM TECH INC

Probe antenna and probe thereof

The application relates to a probe antenna and a probe thereof, the probe antenna comprising two radiation units arranged orthogonally to each other, the radiation unit comprising a substrate, two radiation surfaces located on both sides of the substrate, and a feeding wire arranged in the substrate, the radiation surface comprising a first conductive area, a second conductive area, and a non-conductive area located between the first conductive area and the second conductive area, the width of the non-conductive area gradually increases along a first direction, and the feeding wire comprises a coupling feeding wire segment, which is located below the non-conductive area. In the application, the two radiation units are consistent and arranged orthogonally, thereby solving the problem of the asymmetry of the same polarization pattern of the probe antenna, and the poor consistency of the main polarization pattern and the influence of the cross polarization on the main polarization. Further, the feeding wire is arranged in the substrate, so that the electric signal is transmitted in a closed space, the electric signal cannot be leaked, the isolation of the probe antenna is improved, and the performance of the entire probe antenna is improved.
Owner:GUANGDONG MIKWAVE COMM TECH

A KU dual-polarized waveguide

ActiveCN224318683UWaveguidesEngineeringCross polarization
This utility model discloses a KU dual-polarized waveguide, including a waveguide and a waveguide port connected to each other. The waveguide includes a conversion feed section located at one end of the waveguide away from the waveguide port and a transmission section located at the other end of the waveguide. The conversion feed section has a straight needle and an L-shaped needle extending into the waveguide through an opening. The end of the L-shaped needle extending into the waveguide is not perpendicular to the central axis of the waveguide. The top surface of the conversion feed section has a planar area, and both the straight needle and the L-shaped needle extend into the waveguide through the planar area. This utility model provides a KU dual-polarized waveguide by offsetting the portion of the conventional L-shaped needle extending into the waveguide. This effectively increases the distance between the inner end of the L-shaped needle and the central axis and the straight needle, thus completely isolating horizontal and vertical signals, further optimizing the cross-polarization and isolation of the waveguide, and avoiding interference between the two sets of waveguide excitation signals from the straight needle and the L-shaped needle.
Owner:CHONGQING SPARK TECH CO LTD

Broadband millimeter-wave four-ridged horn probe

ActiveCN116298546BCoaxial probeBroadbanding
This invention discloses a broadband millimeter-wave four-ridged horn probe, which mainly solves the problems of narrow bandwidth and poor pattern symmetry of existing high-frequency probes. It includes a horn housing (1), four ridges (2), a waveguide back cavity (4), two coaxial probes (5), and a short-circuit plate (8). The ridges are fixed in the waveguide back cavity. The two coaxial probes pass through the air cavities of the first and second ridges respectively, extending into the corresponding third and fourth ridges, forming an orthogonal staggered arrangement of the two coaxial probes. The opening of the horn housing adopts a square structure at the break point, and the horn wall has multiple adjacent gaps with unequal spacing (6). Each of the four ridges has an exponentially modulated slot (3) on its ridge near the arc portion. The end of each ridge extends to the feed port and connects to the straight waveguide, and adopts a pyramidal structure (7) with chamfered corners. This invention has a wide bandwidth, good dual-polarization performance, low cross-polarization, and stable pattern, and can be used for antenna measurement and electromagnetic compatibility testing.
Owner:XIDIAN UNIV

A single-port dual-band dual-polarization integrated antenna

This invention discloses a single-port dual-band dual-polarization integrated antenna, comprising a dielectric substrate, a feed port, and a radiating element. The feed port is electrically connected to the radiating element, which is printed on the upper surface of the dielectric substrate and includes two transverse dipoles and two longitudinal annular narrow strip dipoles. The two transverse dipoles are symmetrically arranged on both sides of the feed port for radiating horizontally polarized waves in the first frequency band. One end of each of the two longitudinal dipoles is connected to the feed port for radiating vertically polarized waves in the second frequency band. The longitudinal dipoles and transverse dipoles are arranged perpendicularly and electrically connected at their intersection, forming an integrated composite radiator. Through the synergistic design of the composite radiating structure and orthogonal polarization, dual-band operation is achieved under a single feed port, naturally blocking signal coupling between frequency bands, eliminating the need for additional duplexers and isolation circuits, and suppressing cross-polarization interference. This solves the problems of traditional dual-band dual-polarization antennas, such as a large number of ports, strong mutual coupling interference, and significant cross-polarization.
Owner:XIDIAN UNIV

Polarization-selective variable phase quantization precision reflectarray antenna element, antenna and system

PendingCN122291961ASoftware engineeringCross polarization
This invention relates to the field of data transmission technology, specifically to a polarization-selectable variable phase quantization precision reflective array antenna element, antenna, and system. The polarization-selectable variable phase quantization precision reflective array antenna element includes: a reconfigurable resonant structure with four radiating arms; four controllable switches, each disposed on one of the four radiating arms; and a control circuit for independently controlling the on / off state of each controllable switch. By configuring the on / off state combinations of the four controllable switches, switching between co-polarized and cross-polarized reflection modes is possible, and phase modulation with variable phase quantization precision is supported in both polarization modes. This solution, by setting controllable switches on the four radiating arms of the same reconfigurable resonant structure and employing a specific on / off state encoding strategy, achieves a high degree of integration of co-polarized and cross-polarized dual-mode response and 1-bit and 2-bit variable phase modulation functions, overcoming the technical bottleneck that the number of operating modes is positively correlated with the complexity of the element structure.
Owner:BEIJING INST OF TECH

Adaptive cross polarization interference mitigation

Various arrangements for cross-polarization interference mitigation are detailed herein. A baseline cross-polarization interference density limits of a user terminal (UT) and a baseline throughput of the UT can be determined. An adjustment value can then be determined for an intended polarization (co-pol) isotropic radiated power (EIRP) density, such that the cross-polarization (x-pol) interference density limits are not exceeded. After determining the baseline throughput, an effective co-pol EIRP density of the UT can be set based on the adjustment value. After adjusting the effective co-pol EIRP density of the UT, an adjusted spectral efficiency of the UT can be determined resulting from the adjusting the EIRP density. Finally, an allocated bandwidth to the UT can be adjusted such that a resulting adjusted throughput of the UT at the adjusted spectral efficiency matches the baseline throughput.
Owner:HUGHES NETWORK SYST

A method and system for personal protective equipment wear detection at a construction site

PendingCN122336794APersonal protective equipmentAlgorithm
This invention belongs to the field of construction safety technology, specifically disclosing a method and system for detecting the wearing of personal protective equipment (PPE) on construction sites. The method constructs a PPE wearing detection model based on an improved YOLOv10 architecture. The model includes a feature aggregation module containing multiple parallel hybrid convolutions that extract features sequentially. Each parallel hybrid convolution employs a dual-branch structure: one branch uses wavelet convolution to capture wide-area context to lock the target contour, while the other branch uses lightweight adaptive kernel convolution to match non-rigid postures such as bending and crouching. Furthermore, a cross-polarized multilinear aggregation module is introduced into the model's backbone network. Through explicit injection of geometric coordinate features and a linear attention mechanism, it achieves refined spatial localization and channel feature decoupling, effectively solving the problem of enhancing features of distant, small targets. This invention can identify real-time images of construction sites and determine whether workers are wearing protective equipment.
Owner:GUODIAN FEIXIAN POWER GENERATION CO LTD

A differential MIMO microstrip antenna with high port isolation

The application discloses a high-port-isolation differential MIMO microstrip antenna and belongs to the technical field of wireless communication antennas. The antenna comprises a single-layer dielectric substrate, a metal grounding plate, a 1*2 differential MIMO microstrip radiation unit array and a port-isolation optimization structure. The radiation unit adopts a rectangular microstrip patch design. The port-isolation optimization structure inhibits electromagnetic coupling between units by etching DGS bandgap units on the grounding plate. The antenna is differentially fed through a coaxial line. The antenna spacing is only 0.06. The port-isolation degree reaches-42dB at a 5.36GHz center frequency, is improved by 32dB, the relative bandwidth is 2.22%, the E-plane cross polarization is lower than-30dB within an angle range of-60°<<60°, the in-band gain stability is greater than 6.8dB, and the radiation pattern is stable.
Owner:LIAONING UNIVERSITY OF TECHNOLOGY +2

A port detection method based on context features

ActiveCN116580316BFeature extractionPolarimetric decomposition
The application provides a port detection method based on context features, which is used for polarimetric SAR images, and uses the differences in polarimetric scattering characteristics of water areas and artificial buildings. The water areas and strong scattering built-up areas are extracted by segmenting different polarimetric parameters extracted by polarimetric decomposition. Then, the coastal narrowband area is extracted and the large-area strong scattering area in the band is identified to realize the extraction of the port region of interest by using the context features of the port water area and land. Finally, the port is identified according to the co-polarization and cross-polarization scattering correlation power distribution of the region of interest by using the asymmetric scattering characteristics of the port context artificial building. The implementation results show that the application realizes the port detection under the conditions of complex coastal environment, various port forms and serious noise interference, realizes the simultaneous detection of different sizes and types of ports, effectively reduces the missed detection and false alarm, and is far superior to the existing methods in the detection rate and false alarm rate.
Owner:NORTHWESTERN POLYTECHNICAL UNIV +1

Ultra-wideband miniaturized vertical polarization end-fire antenna

The application discloses a kind of ultra-wideband miniaturized vertical polarization end-fire antennas, belong to wireless communication technology and radar technology field.The antenna includes columnar metal carrier, half-module Vivaldi antenna and PCB top plate;Half-module Vivaldi antenna is uniformly arranged on the outside of metal carrier, and PCB top plate is arranged above half-module Vivaldi antenna, and they are vertically arranged and electrically connected;Arc-round combined slot is arranged on the radiation patch of half-module Vivaldi antenna, first rectangular slot is arranged on the PCB top plate, and they are communicated and synergistic, form slot radiation mode working in low frequency band;Two rows of periodic U-shaped slots are further arranged on the PCB top plate, compensate the impedance mismatch caused by ground current change, break the horizontal polarization current path at the same time, improve the cross polarization performance of antenna.The application adopts half-module low profile Vivaldi structure, reduces the space occupied by antenna;Through slot radiation mode, working cut-off frequency is effectively reduced, and low frequency bandwidth is expanded;Periodic slotting structure improves cross polarization characteristics and realizes good conformal.The application has the characteristics of ultra-wideband and miniaturization, and is suitable for wireless communication and radar system.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA

Method and apparatus for user equipment to distinguish human grasp and protective cover

PendingCN122340591ACross polarizationUser equipment
A method for wireless communication by a user equipment (UE) and an apparatus for performing the method are disclosed. The method includes: receiving multiple cross-polarization captures from a plurality of antenna arrays of the UE; determining that the multiple cross-polarization captures from the plurality of antenna arrays correspond to an environmental scenario; and transmitting a signal using a transmission power based on the determined environmental scenario.
Owner:QUALCOMM INC

An adaptive light source adjustment device for jewelry inspection

PendingCN122306695AExcellent combination outputImprove detection efficiencyParallel polarizationUltraviolet lights
This invention relates to the field of jewelry testing technology, and provides a light source adaptive adjustment device for jewelry testing, including a base and a worktable. A multispectral array light source is arranged above the worktable, and a camera is arranged on one side of the multispectral array light source. The multispectral array light source provides ultraviolet light, white light, near-infrared light, and various monochromatic visible light. A lens switching mechanism is installed at the output end of the multispectral array light source, which can switch the lens to a condenser lens or a diffuser lens. A third motor is fixedly installed on the camera, and a polarization mode switching disk is installed on the output shaft of the third motor. The polarization mode switching disk consists of four sets of polarization mode plates, which correspond to no polarization mode, single polarization mode, cross polarization mode, and parallel polarization mode, respectively. Through the coordinated automatic switching of the lens and polarization mode, multi-level and multi-dimensional observation from the surface to the interior is realized, improving the testing efficiency.
Owner:SHENZHEN YUNCHANG CULTURE TECH CO LTD

A high aspect ratio single parabolic cylinder compact range system based on linear array feed source

PendingCN122171889AElectromagentic field characteristicsCompact rangeCross polarization
This invention discloses a high aspect ratio single parabolic cylindrical compact field system based on a linear array feed, belonging to the field of antenna measurement and compact field technology. The system comprises a high aspect ratio single parabolic cylindrical reflector and a linear array feed located at its focal line. Thanks to the combination of the linear array feed and the single parabolic cylinder, the system avoids complex beamforming designs for high aspect ratio apertures and significantly suppresses the high cross-polarization problem commonly found in offset point source feeds. To address the low-frequency diffraction enhancement problem caused by vertical size limitations, this invention introduces a geometric phase delay design at the reflector edge, i.e., bending the serrated edge backward to introduce phase taper. In the design implementation, the optimal geometric setback at the edge was determined using a numerical optimization method based on the target quiet zone performance. This design, while maintaining the advantages of low cost and ease of fabrication, significantly suppresses edge diffraction, effectively extends the low-frequency operating bandwidth of the compact field, and greatly improves the quiet zone utilization.
Owner:BEIHANG UNIV

An ultrawideband tapered slot wire composite antenna for electromagnetic compatibility testing

PendingCN122370714ACross polarizationMechanical engineering
This invention relates to an ultra-wideband tapered slot-line composite antenna for electromagnetic compatibility (EMC) testing. It includes a slot-line radiator, a coaxial connector, and an open-loop radiator, as well as edge impedance networks and a center impedance network located within the open-loop radiator. By changing the perimeter and conduction band width of the open-loop radiator, the loading positions and impedance values ​​of the edge and center impedance networks, and the lengths of the reverse and rear radiating arms, the antenna's impedance bandwidth and front-to-back ratio can be adjusted. This ultra-wideband antenna effectively reduces the antenna's electrical size and achieves an ultra-wide operating bandwidth. It maintains excellent unidirectional end-fire radiation characteristics and extremely high cross-polarization purity throughout the entire ultra-wideband operating frequency band, providing a high-performance and robust solution for EMC testing of ultra-wideband systems.
Owner:SOUTHEAST UNIV

A low cross-polarization antenna designed based on deep learning

ActiveCN121642533BImplement joint forecastingImplement reverse optimizationRadiating elements structural formsDesign optimisation/simulationAntenna designAntenna impedance
This invention discloses a low cross-polarization antenna based on deep learning-optimized design. The antenna employs a differential feed structure with an H-shaped coupling slot and vertical metal struts to suppress cross-polarization, eliminating the need for an external single-ended to differential converter. It expands bandwidth and stabilizes gain through a double-T-shaped matched short-circuit structure. A highly integrated, miniaturized antenna is achieved using an embedded vertically stacked differential excitation architecture. Optimization is performed using an antenna performance mapping model constructed from a CNN-Transformer hybrid neural network. The training process is optimized using simulated annealing, and optimal structural parameters are selected through multi-objective reverse design. The performance of the optimization method is finally verified through full-wave electromagnetic simulation. This invention combines antenna physics with a deep learning model to achieve synergistic optimization of antenna impedance, bandwidth, and gain, addressing the design requirements for balancing multiple antenna performance indicators. The designed antenna features low cross-polarization, stable gain, and miniaturization.
Owner:HUNAN NORMAL UNIVERSITY