19 results about "High frequency radiation" patented technology

This invention provides a grounding electromagnetic lock, comprising a housing, an electromagnetic actuation component, and a control circuit board. Both the electromagnetic actuation component and the control circuit board are housed within the housing. The lock also includes a connector and a grounding rod fixing mechanism. The grounding rod fixing mechanism includes a connecting rod body, a fixing nut, a first gear, and a second gear. The fixing nut is located on the connecting rod body. A universal connector is detachably provided at the bottom of the connecting rod body for connecting the grounding rod. When the connecting rod body is inserted into the connector, the first and second fixing handles are used to tightly contact the bottom surface of the fixing nut after rotation. This invention fully considers interference types and volume requirements, and specifically designs each component of the electromagnetic lock to prevent electromagnetic interference. This ensures that the entire chain of wireless signal power supply, acquisition, processing, and transmission can effectively cope with switch operation surges, power frequency magnetic fields, and high-frequency radiation within substations, guaranteeing the reliability and stability of wireless signal transmission.

The application relates to a 4G full-band main antenna suitable for a wearable device, which comprises a wearable device shell serving as an antenna support and provided with a low-frequency radiation branch, a medium-frequency radiation branch, a high-frequency radiation branch and a medium-frequency coupling radiation branch on the surface respectively. The low-frequency radiation branch is in an inverted F structure, two short branch ends of which are respectively provided with a feeding point and a second grounding point to jointly form a PIFA antenna basic structure. The high-frequency radiation branch is provided with a first grounding point for generating high frequency. The medium-frequency radiation branch is connected with the low-frequency radiation branch. The medium-frequency coupling radiation branch is provided with a third grounding point, and the medium-frequency coupling radiation branch is coupled with the low-frequency radiation branch to generate medium frequency, and the medium frequency generated by the medium-frequency coupling radiation branch is superposed with the medium frequency generated by the medium-frequency radiation branch to increase the medium-frequency bandwidth. The antenna clearance of the application is only 2mm, supports a narrow black border and a high screen ratio appearance, the efficiency is improved by about 2dB compared with a traditional antenna, the bandwidth is wider, the structure is simple, the manufacturing is simple, the mass production consistency is high, the loss is low and the reliability is high.

The utility model discloses a kind of broadband vehicle-mounted data link antennas, it is related to data link antenna technical field, including antenna mounting frame, the inside fixed mounting of antenna mounting frame has mounting plate, the top of mounting plate is equipped with two article grooves, two article grooves are respectively provided with receiving antenna and transmitting antenna, receiving antenna and transmitting antenna all include mounting seat, high-frequency radiation patch, low-frequency radiation patch, feed cavity and feed connector, electromagnetic wave is fed into feed cavity from the feed connector in mounting seat, under the joint action of feed cavity and high-frequency radiation patch and low-frequency radiation patch, form high-low frequency resonance, through the double-layer parallel laminated structure of high-frequency radiation patch and low-frequency radiation patch, cooperate feed cavity to form composite resonance system, break through the operating bandwidth limit of only a few percent of traditional microstrip antenna, realize multi-band collaborative work, satisfy the broadband communication demand of vehicle-mounted data link.

The invention relates to an identification method having improved spatial resolution, comprising at least one reading device and at least one tag, wherein the at least one tag is coded by means of a plurality of notches, and wherein under appropriate excitation the at least one tag supplies both a linear response and a non-linear response, the method comprising the steps of: identifying whether one or more tags are located at a location, identifying which of the tags is located at the location.The invention further relates to a system for the method according to the invention, comprising a reading device and at least one tag, wherein the reading device is configured to emit high-frequency radiation in a first frequency band in order to excite one or more tags, wherein the reading device is configured to vary the emitted radio-frequency radiation, and to receive radiation from at least one tag, and to determine a forward transmission parameter and / or an input reflection parameter.

The application provides a low-profile dual-frequency dual-circularly-polarized shared-aperture antenna and an array thereof, and relates to the technical field of antennas.In the application, the shared-aperture antenna adopts a substrate integrated waveguide structure, and a dual-feed-point multimode resonant cavity is a core structure of the substrate integrated waveguide structure.Based on the resonant cavity structure, the traditional complex power-division feed network is simplified.A low-frequency coaxial adapter and a high-frequency coaxial adapter are arranged at the bottom of the dual-feed-point multimode resonant cavity;low-frequency tuning columns and high-frequency tuning columns are regularly arranged in the middle of the dual-feed-point multimode resonant cavity, and are used for adjusting the field distribution characteristics in the resonant cavity;low-frequency radiation slots and high-frequency radiation slots are regularly arranged at the top of the dual-feed-point multimode resonant cavity.In addition, a polarization conversion layer is loaded above the radiation slots, the polarization conversion layer comprises low-frequency polarization conversion metal sheets and high-frequency polarization conversion metal sheets, and the two kinds of polarization conversion metal sheets are regularly distributed on the two sides of the corresponding low-frequency radiation slots or high-frequency radiation slots, so that electromagnetic waves are converted from linear polarization to circular polarization.

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.

The present invention relates to the technical field of microwave radio frequency test. Disclosed are a tip structure for suppressing radiation, a two-dimensional probe and a probe structure. For the problems in millimeter-wave to terahertz on-chip testing of serious high-frequency radiation leakage, difficulty in continuous matching between impedance and broadband, mutual interference between a direct-current bias path and a radio frequency channel, poor balance of differential measurement, and the like, a cantilever shielding layer is introduced into a tip structure to construct a quasi-TEM transmission environment, thereby suppressing high-frequency radiation at source; a rectangular micro-coaxial structure, a rectangular waveguide-to-circular coaxial conversion structure, and an integrated direct-current bias network that are realized in light of additive manufacturing improve impedance continuity and structural consistency in a high-frequency band; and on this basis, a dual-band two-dimensional probe integrated with a duplexer, a differential two-dimensional probe suitable for differential measurement and a closed probe are further provided, so that a test system realizes single-ended and differential on-chip testing having high isolation, high repeatability and high precision in an ultra-wide frequency range.

This application relates to the field of NVH analysis technology, and particularly to a method, apparatus, and equipment for NVH performance analysis of automotive valve cover. The method includes: performing structural vibration response analysis using a finite element model based on the valve cover to obtain the spatial coordinates and vibration response data of each node on the valve cover structural surface; generating an acoustic mesh based on the spatial coordinates and vibration response data of each node and interpolating the structural vibration response data; iteratively adjusting the local density of the acoustic mesh until the mapping error meets the preset accuracy requirements, directly solving the high-frequency interpolation distortion problem caused by the non-coincidence of the spatial positions of the structural mesh and acoustic mesh nodes; performing radiated noise simulation calculations based on the acoustic mesh whose mapping error meets the mapping accuracy requirements, and outputting simulation results, ensuring the accuracy and reliability of the input boundary conditions for the radiated noise simulation calculations, ultimately improving the accuracy of the high-frequency radiated noise simulation results of the valve cover.

This application relates to the field of antenna technology, and specifically discloses an antenna and a mobile terminal. The antenna is applied to the mobile terminal, which includes a metal casing. The antenna includes a bracket, a radiating module, and a conductive connection component. The bracket is at least partially housed within the metal casing and has adjacent first and second mounting surfaces. The first mounting surface is exposed outside the metal casing, and a gap exists between the second mounting surface and the metal casing. The radiating module is mounted on the bracket and includes an impedance matching region, a low-frequency radiation region, and a high-frequency radiation region. The impedance matching region is located on the first mounting surface and is used to adjust the matching degree between the high-frequency and low-frequency radiation regions. The low-frequency and high-frequency radiation regions are located opposite each other on the second mounting surface. The conductive connection component connects the radiating module and the metal casing. This structure improves the stability of network signal connections in all-metal laptops and expands the range of network signal operating frequency bands.

The invention relates to an identification method with improved spatial resolution comprising at least one reading device (L) and at least one tag (T1,...), wherein the at least one tag (T1...) is encoded by means of a plurality of notches, and wherein the at least one tag (T1...) provides both a linear and a non-linear response upon appropriate excitation, the method comprising the steps: • Identifying (100) whether one or more tags (T1...) are located at a location, • Identifying (200) which of the tags is located at the location. The invention further relates to a system for the method according to the invention comprising a reading device (L) and at least one tag (T1,...), wherein the reading device (L) is configured to emit high-frequency radiation in a first frequency band to identify one or more tags (T1...) to stimulate, wherein the reading device (L) is configured to vary the emitted high-frequency radiation, and to receive radiation from at least one day (T1,...), and to determine a forward transmission parameter or an input reflection parameter.

This invention relates to a high-gain dual-polarized parabolic antenna system and its performance preservation method. The system includes: a parabolic reflector; a feed source disposed at the focal or near-focal region of the parabolic reflector; the feed source includes a printed circuit board (PCB) on which metal oscillator elements are formed by etching; the metal oscillator elements include at least two sets of orthogonally arranged oscillators, forming radiation in two orthogonal polarization directions; each oscillator element integrates a low-frequency radiating section for a first frequency band and a high-frequency radiating section for a second frequency band, the first and second frequency bands corresponding to the 900MHz and 1800MHz frequency bands, respectively; the feed source radiates dual-polarized electromagnetic waves through the metal oscillator elements, and the electromagnetic waves are reflected by the parabolic reflector to form a high-gain directional beam. This invention achieves a compact structure and low-cost manufacturing while significantly improving the electrical performance of the antenna over a wide bandwidth, providing an efficient and flexible solution for modern wireless communication.

The utility model discloses lightning -resistant electromagnetic shielding cabin structure of wind generating set variable pitch system relates to wind generating set shielding cabin field, including cabin body, one side fixed mounting of cabin body has hinged seat, one side of cabin body is provided with hatch, and the hinged seat is rotatably installed between hatch, shielding subassembly, shielding subassembly sets up inside cabin body, wherein, shielding subassembly includes ground point, shielding part. The utility model discloses through setting up cabin body shell of composite structure, is cabin body, middle layer, inner layer respectively, when high frequency electromagnetic wave is transmitted into cabin, produces intense " reflection effect " in aluminum alloy, stainless steel surface layer, and reflection loss can reach 20 40db, realizes high frequency radiation shielding, and when low frequency radiation passes through nickel iron alloy surface, can " bind " low frequency magnetic field in metal inside, through magnetic hysteresis loss fast attenuation magnetic field energy, avoids the influence of radiation to cabin internal structural member.

This invention discloses a dual-band co-aperture circularly polarized antenna, comprising a metal cavity structure and high-frequency antenna elements and low-frequency antenna elements stacked from top to bottom within the cavity. The high-frequency antenna element includes a high-frequency radiating patch layer and a high-frequency feed layer connected to an orthogonal L-shaped probe feed structure. The low-frequency antenna element includes a low-frequency radiating patch layer and an air layer. The low-frequency radiating patch layer has a second radiating patch, an orthogonal edge-coupled feed structure, and a parasitic structure. The feed positions of the two sets of feed structures are arranged orthogonally in a horizontal spatial plane, and their excitation regions do not overlap. The low-frequency radiating patch layer and the bottom surface of the cavity serve as the metal ground planes for the two sets of feed structures, respectively. This invention can significantly improve the isolation between the high-frequency and low-frequency elements of the co-aperture antenna, expand the operating bandwidth, achieve stable circularly polarized radiation, and adapt to the integrated application requirements of satellite navigation systems.

A dual-frequency, dual-polarized magnetoelectric dipole filter antenna is disclosed, relating to a magnetoelectric dipole antenna. It includes a bottom dielectric substrate, a feeding structure, a magnetic dipole dielectric substrate group, an electric dipole dielectric substrate, and a filter magnetic dipole dielectric substrate group. Slots are provided on the bottom dielectric substrate for connecting and fixing the filter magnetic dipole dielectric substrate group; slots are provided on the electric dipole dielectric substrate for the filter magnetic dipole dielectric substrate group to pass through. The magnetoelectric dipole antenna structure generates a low-frequency radiation null point I, extends the end microstrip line of the microstrip power divider to obtain an intermediate-frequency band radiation null point II, introduces an intermediate-frequency band filter magnetic dipole patch to obtain an intermediate-frequency band radiation null point III, and a slot structure is provided in the connection structure between the magnetic dipole and the electric dipole to obtain a high-frequency sideband radiation null point IV. A high-frequency out-of-band filter magnetic dipole patch is introduced to obtain a high-frequency radiation null point V. The filter magnetic dipole is located inside the magnetoelectric dipole antenna, without increasing the antenna profile height and outline dimensions, eliminating the need for a filter network, and achieving dual polarization and dual-frequency bandpass filtering.

This application relates to the field of industrial automation technology, and in particular to a differential anti-interference system for high-frequency carrier PCBAs in industrial 5G electricity meters. The system includes: a data acquisition module, a spatial radiation suppression module, a differential signal enhancement and transmission module, a PCBA hardware protection module, and an intelligent adaptive adjustment module. The data acquisition module collects raw electricity consumption data and 5G communication data; the spatial radiation suppression module uses a composite structure to physically protect sensitive areas, absorbing and shielding high-frequency radiation interference; the differential signal enhancement and transmission module reduces signal reflection and delay differences through differential line design, dynamically compensating for signal attenuation caused by interference; the PCBA hardware protection module reduces grounding impedance fluctuations through a hybrid grounding network; and the intelligent adaptive adjustment module detects high-frequency interference intensity and dynamically adjusts the anti-interference strategy. This solves problems such as inefficient spatial radiation shielding and differential transmission attenuation.