12 results about "Electromagnetic mode" patented technology

The invention discloses an Airy beam generation method and device. The method comprises the following steps: S1, determining a working frequency and constructing the device; s2, establishing a corresponding relationship between the geometric parameters of the leaky wave unit and the leaky wave phase and amplitude; s3, solving one-dimensional Airy beam complex amplitude distribution; s4, reversely solving unit geometric parameters to realize target complex amplitude regulation and control; and S5, constructing the metasurface complex amplitude regulation and control device based on the one-way electromagnetic mode. According to the invention, the size of the metal block and the thickness of the air dielectric layer are independently regulated and controlled, so that complex amplitude regulation and control of transmission waves in a free space are realized; the metasurface device is simple and convenient in structural design, high in efficiency, easy to integrate and reconfigurable, can replace a spatial light modulator through a one-way waveguide phase regulation and control function, reduces the system cost, improves the integration level, and is suitable for on-chip integrated efficient free space wavefront control application.

Apparatuses and methods for accelerating charged particles include an accelerator. The accelerator includes a cavity comprising a chamber and conductive walls enclosing the chamber, and having one or more inlets and one or more outlets, an electro-magnet substantially surrounding at least a portion of the cavity; two or more rods disposed predominantly longitudinally within the chamber; and one or more RF couplers. The RF couplers are configured to generate a rotating or non-rotating dipole radio frequency field within the cavity by exciting the RF couplers in phase to accelerate the charged particles entering the cavity through the one or more inlets. The radio frequency field operates predominantly in transverse electromagnetic mode.

The application discloses a terahertz optical fiber-space mode adapter, which comprises an antenna, a rectangular waveguide, a power divider, a mode converter, a circular waveguide and a transition horn; the antenna is connected with the rectangular waveguide; the power divider is connected with the rectangular waveguide, and an output port is connected with an input port of the mode converter; the mode converter is provided with a plurality of output ports and is arranged on the circular waveguide in a circumferential symmetry mode; the transition horn is connected with the circular waveguide; the antenna is used for receiving a space electromagnetic wave and feeding the space electromagnetic wave into the rectangular waveguide; the rectangular waveguide is used for transmitting a TE10 mode; the mode converter is used for converting the TE10 mode into a TE01 mode in the circular waveguide; and the circular waveguide is used for propagating the TE01 mode to the transition horn and filtering a terahertz wave of an unwanted mode. The adapter provided by the application can receive a space electromagnetic wave through the antenna, then generate a required high-purity electromagnetic mode through the mode converter, efficiently excite a required mode of an optical fiber, and avoid an impure excitation mode.

This invention proposes an orbital angular momentum circularly polarized antenna based on the chiral corridor mode of a magneto-optical photonic crystal. The antenna comprises a magneto-optical photonic crystal cluster and two metal plates. The cluster is composed of a periodically arranged array of magneto-optical photonic crystal cells, each with an applied bias magnetic field. The two metal plates are clamped to the upper and lower sides of the cluster, forming upper and lower electric walls to constrain the electric field direction. A perimeter fence surrounds the cluster, connecting to the two metal plates to form a corridor cavity supporting the chiral corridor mode. Multiple radiating slots are evenly spaced along the circumference on the top or sidewalls of the corridor cavity. These slots couple the confined electromagnetic modes within the cavity into directional radiation in free space. This invention utilizes the tensor permeability of the magneto-optical photonic crystal to construct the chiral corridor cavity. Through lateral slotted coupling radiation, it achieves pure excitation of high-order orbital angular momentum beams while simplifying the antenna structure and reducing feeding complexity.

The invention relates to a capacitance detection and electromagnetic detection device. The capacitance detection and electromagnetic detection device comprises a detection chip and a screen wiring device interacting with the detection chip, the screen wiring device comprises longitudinal wiring and transverse wiring, the transverse wiring is connected to an X pin of the detection chip, the longitudinal wiring is connected to a Y pin of the detection chip, and mutual capacitance for capacitance detection is formed between the longitudinal wiring and the transverse wiring; the detection chip is configured to perform set signal driving and detection on the screen wiring device so as to complete time-sharing detection of electromagnetism and capacitance; and the screen wiring device is configured to interact with the electromagnetic pen in the electromagnetic mode to complete the writing action. Detection of capacitance and electromagnetic signals is completed through one chip and one screen routing, part of the screen routing serves as capacitance detection routing and also serves as electromagnetic driving / detection routing, the cost of a capacitance / electromagnetic two-in-one system is greatly reduced, and electromagnetic pen detection can be achieved only by adding four screen routing.

The invention discloses a low-sidelobe high-polymerization vortex electromagnetic wave generation method. The method comprises the following steps: step 1, selecting a uniform circular ring array antenna as an antenna for generating low-sidelobe high-polymerization vortex electromagnetic waves; 2, combining a plurality of uniform circular ring array antennas to obtain a multi-circle concentric circular ring array antenna; a multi-mode vortex electromagnetic wave beam is generated by using a multi-circle concentric circular ring array antenna; each circular ring array antenna correspondingly generates one mode; 3, adopting a plurality of circular ring array antennas in the multi-circle concentric circular ring array antennas to cooperate to generate a low-sidelobe vortex electromagnetic wave beam; and step 4, selecting a plurality of vortex electromagnetic modes to generate a mode group, performing directional diagram shaping of the wave beam on the azimuth angle through a directional diagram function to obtain a directional diagram, and realizing regulation and control on the intensity and the initial phase of each vortex electromagnetic mode in the mode group so as to obtain the vortex electromagnetic wave beam. The method solves the problems of energy cavity, divergence and high side lobe, and is suitable for multi-dimensional and high-resolution observation of military targets.

An Airy beam generation method and device, the method comprising: S1, determination of working frequency and device construction; S2, establishing the corresponding relationship of leaky wave unit geometric parameters and leaky wave phase, amplitude; S3, solving one-dimensional Airy beam complex amplitude distribution; S4, backstepping unit geometric parameters to realize target complex amplitude regulation; S5, constructing a super surface complex amplitude regulation device based on one-way electromagnetic mode. The application realizes the complex amplitude regulation of transmission wave in free space by independently regulating the size of metal block and the thickness of air medium layer; the super surface device is simple in structure design, high in efficiency, easy to integrate and reconfigurable, and can replace the spatial light modulator through the one-way waveguide phase regulation function, reduce the system cost and improve the integration, and is suitable for on-chip integrated high-efficiency free-space wavefront control applications.

The application discloses a surface displacement monitoring device based on Beidou GNSS and an intelligent monitoring method, the method comprising detachable connection of an unmanned aerial vehicle with a base and a field monitoring node based on an electromagnetic mode, realizing wide-range remote self-adaptive fast installation, and combining wireless communication transmission between a monitoring core module and a terminal, realizing accurate displacement monitoring under a high slope scene, hoisting of the base achieving anchoring effect through a threshold opening embedded structure, being capable of being applied to different monitoring scenes, adapting to different flatness ground, and maintaining stability of the device; a photosensitive sensor array senses ambient light changes, drives a photovoltaic power generation plate to coordinate torsion, and effectively improves light energy utilization efficiency. The application realizes surface displacement safety monitoring and disaster evaluation and early warning for key areas which are difficult for people to reach, represented by high slope monitoring, and has very important significance.

The application discloses a dual-mode sound emission target direction-of-arrival estimation method, which comprises the following steps: firstly, synchronously collecting electromagnetic echo signals and acoustic signals of a target; obtaining an electromagnetic mode phase matrix and an acoustic mode phase matrix respectively; then, extracting an electromagnetic characteristic vector and an acoustic characteristic vector; taking the electromagnetic characteristic vector and the acoustic characteristic vector as inputs, and outputting electromagnetic target mode characteristics and acoustic target mode characteristics through a mode adaptive gating module respectively; taking the electromagnetic target mode characteristics as source mode characteristics of the acoustic target mode, and taking the acoustic target mode characteristics as source mode characteristics of the electromagnetic target mode; obtaining a dual-mode fusion characteristic vector; finally, inputting the dual-mode fusion characteristic vector into a classifier to output a target direction-of-arrival probability distribution, and selecting a direction with the maximum probability as a final direction-of-arrival estimation result. The method applies electromagnetic mode and acoustic mode joint perception for estimation, and can fully utilize the complementary characteristics between different physical modes.

The invention discloses an MPCVD cylindrical reactor based on a distributed antenna array structure, and relates to the field of microwave plasma chemical vapor deposition. The reactor comprises a power divider and a distributed antenna array multi-port cavity; the power divider is arranged at the upper end of the distributed antenna array multi-port cavity and is connected with the distributed antenna array multi-port cavity through a cavity port outer conductor; the power divider is used for uniformly distributing an input microwave signal to obtain a plurality of same sub-microwave signals; and the distributed antenna array multi-port cavity adopts a cylindrical structure and is used for receiving a plurality of same sub-microwave signals and exciting a fixed TM electromagnetic mode in a discharge area. The microwave energy utilization efficiency is effectively improved.

An aerosol-generating device for heating an aerosol-forming substrate to generate an aerosol therefrom is provided. The apparatus includes a resonant cavity for removably receiving an aerosol-forming substrate, an electromagnetic wave generator for generating radio frequency (RF) electromagnetic waves, and control electronics coupled to the electromagnetic wave generator. An electromagnetic wave generator is coupled to one or more locations within the resonant cavity to deliver RF electromagnetic waves to the resonant cavity under control of the control electronics to selectively excite different predetermined electromagnetic modes of the resonant cavity.

This invention discloses a multi-dimensional detection and location method and system for arc faults in building electrical circuits. The method injects low-amplitude broadband excitation signals into key nodes of the power distribution circuit using electromagnetic excitation and sensing devices, collects the line response waveform, and establishes a steady-state electromagnetic response baseline. Based on the baseline, autocorrelation calculations and spectrum analysis are performed to extract the resonance peak frequency, energy distribution, and bandwidth characteristics, generating an electromagnetic mode feature fingerprint. By constructing a time-frequency coupled resonance matrix, the frequency shift of the resonance peak and changes in the energy gradient are monitored in real time to identify abnormal resonance states of the line. After detecting an anomaly, a spatial location equation is established based on the phase distribution of multiple nodes, and a phase inversion algorithm is used to determine the location of the arc or breakdown source. The line stability coefficient is calculated by combining the location results with time-series resonance data to predict the arc risk level. When the risk level exceeds a threshold, an electromagnetic compensation module is activated to generate an opposite phase suppression signal and inject it into the abnormal area, achieving active protection closed-loop control.