64 results about "Near field coupling" patented technology

The invention provides a tip Raman-based metal oxide nanoparticle in-situ detection method, which comprises: S1, dispersing metal oxide nanoparticles in a nanoparticle dispersion liquid, focusing laser to the tip of a nanometer tip through an objective lens, capturing a single nanoparticle by using an optical tweezers technology, and attaching the single nanoparticle to the nanometer tip; s2, focusing Raman laser on a nano needle tip-particle interface, generating a local high-temperature field through a photo-thermal near-field coupling effect, triggering a thermal chemical reaction of nano particles, and synchronously collecting a Raman spectrum; and S3, carrying out pretreatment and characteristic peak analysis on the collected Raman signal of the Raman spectrum, and determining the reaction critical temperature and the dynamic process in combination with temperature calibration data. According to the invention, capture and accurate heating of the nanoparticles are realized through photo-thermal coupling of the optical tweezers and the needle tip, and thermal chemical reaction monitoring of the nanoparticles is realized.

The invention provides a fault signal detection system and an analysis positioning method, and relates to the technical field of signal detection. An injection module is used for periodically applying narrowband acoustic disturbance capable of adaptively selecting frequency and power to an optical cable sheath; the passive wireless label nodes arranged along the line collect multi-dimensional data such as arrival timestamps, amplitudes, frequencies, phases, local temperatures and the like in real time, and upload the data through near-field coupling. And the convergence module completes node identification association and batch aggregation, the analysis and construction module constructs an acoustic propagation path map, and after temperature difference segmentation compensation, an actual laying path is dynamically recovered by adopting a map search algorithm. And the projection and identification module maps the map to a geographic information system coordinate system and outputs a fault space position, thereby realizing real-time and accurate optical cable fault positioning under a topology-free prior condition, remarkably reducing manual inspection and misjudgment rates, and being suitable for a multi-branch and multi-repair long-distance communication or power optical cable scene.

The invention relates to the technical field of electromagnetic metasurfaces and bionic computing, and discloses a bionic information processing method and system based on an electromagnetic metasurface. The method comprises the following steps: S1, mapping DNA sequence information into a multi-dimensional coding state of the bionic metasurface information processing unit in an electromagnetic adjustable parameter space; s2, realizing co-evolution of the multi-dimensional coding state in space, frequency, phase and amplitude dimensions by dynamically regulating and controlling electromagnetic response parameters of the bionic metasurface information processing unit; and S3, using propagation and interference of electromagnetic waves in the diffraction neural network and a near-field coupling effect between the bionic metasurface information processing units to complete copying, logical operation and information read-write operation of the DNA sequence information. The functions of DNA coding, copying, logic calculation, information reading and writing and the like are uniformly mapped into the programmable electromagnetic metasurface platform, and cooperative processing of information in the aspects of space, electromagnetism and algorithm is achieved.

The invention provides a logarithmic spiral motor design method, belongs to the technical field of spiral motor design, and designs logarithmic spiral electromagnetic topology, fuses a plurality of materials, constructs an integrated structure body, and sets an intelligent regulation and dynamic matching control mode. Firstly, a magnetic flux path is optimized, magnetic flux is naturally distributed in the tangential direction of a spiral line by utilizing the characteristic that the curvature of the spiral line is continuously increased or decreased, edge magnetic flux distortion is reduced, then near-field coupling is enhanced, and the magnetic flux superposition phase difference between adjacent spiral units is controlled by adjusting spiral line parameters. The double targets of active enhancement of effective magnetic flux and suppression of magnetic leakage are achieved. Through deep fusion of geometric characteristics and electromagnetic laws of logarithmic spiral lines, pole slot limitation and loss bottlenecks of a traditional motor are broken through, through a logarithmic spiral line electromagnetic topology design normal form, geometric curvature and magnetic field distribution are quantitatively associated, and through a conductive, magnetic conductive and heat dissipation composite winding and an intelligent magnetic barrier structure, multi-field collaborative optimization is achieved.

The invention provides a low-power-consumption near-field coupling energy supply OTA circuit, belongs to a wireless software upgrading technology, aims to solve the wireless upgrading problem of a GNCE control system, and comprises a near-field coupling energy supply module which is used for locally supplying energy to the system, eliminating system placement direction limitation and switching resonant frequency through a self-adaptive resonance matching unit to realize the optimal energy supply efficiency. A primary power supply is output to the power management module, and the energy supply state is monitored in real time; the power management module is used for providing a secondary power supply for the OTA security upgrade verification module and the OTA upgrade task execution module according to a preset power-on time sequence and an enabling sequence; the OTA security upgrading verification module is used for judging the security of a system and a source program, confirming feedback through double channels of a visual signal and a wireless encryption signal, ensuring the security and accuracy of an upgrading process, supporting remote and local double supervision and preventing software burning failure and tampering; and the OTA upgrade task execution module executes the functions of upgrade process control, state monitoring, program receiving, verification, backup, burning, rollback and the like.

The application relates to the technical field of quantum precision measurement, and discloses an integrated wide-temperature-range diamond nitrogen vacancy color center quantum noise spectrometer, which comprises an integrated optical path module arranged outside a low-temperature constant temperature module, an electronic module, an integrated laser module and a data processing module; the integrated optical path module is connected with the electronic module and the integrated laser module through an optical fiber and is spatially coupled with the low-temperature constant temperature module; the electronic module comprises a double-path chip-level signal generation path; a microwave antenna and a probe are arranged in the low-temperature module; by mechanically decoupling the integrated optical path module and the low-temperature module, vibration interference caused by the refrigeration process is effectively blocked, a laminated near-field coupling structure and an integrated control circuit are matched, high-stability in-situ quantum sensing under a wide-temperature-range environment is realized, the integration degree and the measurement signal-to-noise ratio of the system are improved, and the overall volume and the manufacturing cost of the whole machine are reduced.

The invention provides a near-field feed low-complexity reconfigurable antenna system, which belongs to the technical field of millimeter wave communication antennas and comprises a 1-bit phased array, a waveguide feed horn array and an air gap between the 1-bit phased array and the waveguide feed horn array. The 1-bit unit is composed of two magnetoelectric dipoles, and two diodes are integrated in the receiving unit to achieve 1-bit phase control. According to the 1-bit reconfigurable magnetoelectric dipole phased array disclosed by the invention, one horn mouth surface is used as a near-field feed source of the 2 * 2 magnetoelectric dipole sub-array, so that not only is the uniformity of aperture irradiation ensured through near-field coupling, but also the number of required phase shifters is reduced, and the excitation of the 1-bit reconfigurable magnetoelectric dipole phased array is conveniently realized. The waveguide phase shifter is directly integrated in the horn array antenna, by means of the working phase range wide enough, the phase shifter can effectively achieve phase distribution needed by array near-field feed, and mirror lobes in scanning beams are successfully suppressed. The reconfigurable array antenna is high in aperture efficiency, low in profile and simple in structure, and has the broadband scanning capability.

The application discloses a near field communication method of a wireless charging system, which comprises a transmitting end circuit and a receiving end circuit, the transmitting end circuit comprises a first resonant circuit and a third resonant circuit, the receiving end circuit comprises a second resonant circuit and a fourth resonant circuit, the transmitting end and the receiving end are both provided with a signal extraction circuit, the method comprises the following steps: transmitting high-power energy through the first resonant circuit and the second resonant circuit; realizing half-duplex communication and low-power energy transmission between the transmitting end and the receiving end by using the third resonant circuit and the fourth resonant circuit, the half-duplex communication is based on near field coupling, and a power signal is removed through the signal extraction circuit to obtain clean and effective communication signals; and the low-power energy transmission provides an auxiliary power supply for the receiving end or the transmitting end. The application can solve the problems of crowded frequency bands, signal interference and complex positioning, supports bidirectional auxiliary power supply transmission between the transmitting end and the receiving end, and realizes self-power supply or low-power consumption wake-up function.

This invention relates to the field of medical device technology, and more particularly to an intelligent probe patch for monitoring blood circulation in microscopic free flaps, comprising: a disposable probe patch configured to be attached to the surface or edge of the free flap; a biocompatible adhesive layer is provided on the bottom surface of the flexible base of the disposable probe patch, and an auxiliary structure is provided on the top of the flexible base to resist postoperative tissue activity or secretions; the disposable probe patch integrates an optical sensing unit and a temperature sensing unit for collecting local blood oxygen saturation, pulse rate, and surface temperature of the flap, respectively; a repeater, establishing non-contact near-field coupling with the disposable probe patch, the repeater being configured to provide working power to the disposable probe patch through near-field coupling, enabling it to operate without a built-in battery; and synchronously receiving physiological parameter data reflecting the local microcirculation status of the flap collected by the disposable probe patch; and a terminal device, wirelessly connected to the repeater, receiving and processing the physiological parameter data.

The present invention discloses a near-field feedback system for a dual-polarized millimeter-wave phased array, which is composed of a dual-polarized feedback architecture and a dual-polarized radiating antenna located in the antenna plane. The feedback architecture can achieve stable broadband coupling with the radiating antenna without affecting its normal operation. The present invention discloses a self-calibration system for a dual-polarized millimeter-wave phased array, which calculates the near-field coupling coefficient through electromagnetic simulation, calculates the calibration coefficient according to the near-field feedback signal, the near-field coupling coefficient and the reference signal, and realizes self-calibration by digitally controlling the amplitude and phase. The present invention also discloses a digital pre-distortion system for a dual-polarized millimeter-wave phased array, which first collects feedback signals in the far-field main lobe direction for digital pre-distortion training, then collects ideal pre-distortion signals of corresponding polarization and scanning angles in the near field, establishes a corresponding lookup table, and finally uses iterative learning to train the digital pre-distortion function to minimize the difference between the actual near-field signal and the near-field ideal pre-distortion signal, thereby realizing the linearization of the far-field beam.

This invention proposes a method and device for pairing RFID tags based on near-field coupling. This method configures a flag in a flag storage unit to set an RFID tag as either a master or slave tag. Tag pairing is achieved through near-field coupling communication between the master and slave tags. A reader only needs to perform a normal inventory to obtain tag pairing information. This method enables accurate and efficient batch pairing of RFID tags.

This invention belongs to the field of near-field communication technology, and specifically relates to a near-electric field coupled wireless networking communication system and method for completely buried spaces. It includes: a plurality of slave communication nodes for collecting environmental data of the surrounding space; these slave communication nodes are spaced apart on a metal cable in the goaf and communicate with other nodes via near-field coupling through the metal cable, forming a wireless network with each slave communication node and its corresponding metal cable; and a main communication node for aggregating environmental data from each slave communication node and connecting to a host computer to achieve goaf environmental monitoring. The main communication node is located at the coal face, with one end of the metal cable connected to the main communication node and the other end extending longitudinally through the goaf and into the completely buried space. This invention uses symmetrical electric dipole antennas of the communication nodes to couple electric field signals to the metal cable or to sense electric field signals fed back from other nodes on the metal cable for wireless networking communication. Under completely buried conditions, it can ensure the communication quality of communication nodes near the metal cable.

The utility model relates to the cable field, and especially relates to a multichannel isolation shielding cable comprising a cable core, a composite shielding layer, a filling layer and a protection layer, the composite shielding layer wraps the cable core, and the filling layer is filled between the composite shielding layer and the protection layer; the composite shielding layer comprises an inner shielding layer, an insulating layer and a shielding tape layer, the inner shielding layer wraps the outer side of the cable core, the insulating layer wraps the outer side of the inner shielding layer, the shielding tape layer wraps the insulating layer, and a bonding layer is arranged on the side, making contact with the insulating layer, of the shielding tape layer. According to the utility model, near-field coupling and frequency band cross interference among the wire cores can be effectively reduced, and the anti-interference capability of the cable is significantly improved.

This invention relates to the field of microstrip antenna technology, and more particularly to a tightly spaced MIMO microstrip antenna with adjustable E-plane radiation pattern. The antenna includes main patch elements, a quarter-wavelength impedance transformation line, a feed transmission line, a dielectric substrate, a metal ground plane, a metal ground wall, and a metal strip. Two main patch elements are located on the upper surface of the dielectric substrate with a spacing of 2.58 mm. This invention places a metal strip with etched bends between the two patch elements arranged in the E-plane. The antenna energy is coupled to the metal strip through near-field coupling and excites the gaps, resulting in a combination of gap radiation energy and antenna radiation energy, which modulates the tilted radiation pattern. This achieves side-firing close to the gap antenna elements. Simultaneously, the metal ground wall below the metal strip extends the ground current path, achieving decoupling. This invention improves the isolation between the two tightly spaced patch elements along the E-plane and enables adjustable unilateral radiation patterns, making it suitable for future small MIMO antennas.

The application discloses a flexible metasurface integrated antenna for robot energy-carrying communication, which has wireless energy collection and communication functions and is a double-layer flexible substrate structure with two input ports, one port for wireless energy collection and the other port for edge radiation and end radiation wireless communication of different frequency bands. Wireless energy collection is achieved by means of a metasurface antenna, a metasurface unit of which is composed of a joint structure of an open ring slot and an I-shaped slot in the top layer, a floor embedded with a complementary open ring slot in the middle layer and a feed network with functions of feeding and combining in the bottom layer; end radiation of the wireless communication antenna is achieved by means of a Vivaldi structure in the middle layer, and edge radiation is achieved by means of two half-circular folded open rings placed face to face and located above the middle axis of two radiation arms of the Vivaldi and placed in the top layer and excited by the near-field coupling of the Vivaldi. The flexible metasurface integrated antenna is covered on the surface of mechanical parts such as robot hands, feet, arms and waists and is used for energy supply and communication control of various drivers.

The application relates to a self-adaptive WPT system and method based on a symmetric anti-resonance-resonance, which comprises an anti-resonance-resonance structure, an anti-resonance structure at a transmitting end and a resonant structure at a receiving end, the anti-resonance structure comprises a first resonant unit and a second resonant unit which are coupled to each other, the first resonant unit is connected with a power supply, the resonant structure comprises a third resonant unit which can be coupled with the near field of the second resonant unit, and the anti-resonance-resonance structure is configured to satisfy; a controllable loss module is connected between the resonant structure and a load, and is used for dynamically adjusting the output voltage value transmitted to the load, so that the system is kept. The application can adaptively track the BIC condition in the mode of adjusting the electrical parameters of the circuit, the control method is simple and easy to realize, and can be used for complex and changeable application scenes.

The application relates to the field of semiconductor technology and discloses a microwave reflection photoconductance measurement system for wafer film carrier lifetime, which comprises a reconfigurable differential metasurface probe, which interacts with a wafer film to be measured in a near-field coupling mode; an optical excitation module, which performs pulsed light irradiation on the wafer film below a measurement area to generate non-equilibrium carriers; a dual-channel microwave transceiving module, which feeds microwave signals to the measurement area and a reference area; a closed-loop feedback control module, which receives the differential signal as input before the optical excitation module works; and a data acquisition and processing module, which collects transient changes of the differential signal after the optical excitation module works. The closed-loop feedback control module actively adjusts the microwave response of the reconfigurable probe reference area, the differential signal baseline is locked to zero before measurement, common-mode noise is suppressed, and the signal-to-noise ratio of the transient decay curve and the measurement accuracy are improved.

The invention discloses a Janus antenna array device and method for realizing one-way near-field coupling of a coupling surface. More flexible near-field directional excitation of light is realized. The device of the Janus antenna array for realizing the unidirectional near-field coupling of the coupling surface comprises a feed network structure and an outer coupler, the outer coupler comprises two dielectric waveguides which are parallel to each other, and the two dielectric waveguides are arranged at an interval to form an assembly space; the feed network structure comprises a feed network and a plurality of Janus antennas based on Janus dipoles, the Janus antennas are connected to the feed network, the Janus antennas are arranged in the assembly space in an array mode, each Janus antenna is provided with an electric dipole and a magnetic dipole, and the electric dipoles and the magnetic dipoles are perpendicular to each other and have phase differences. The magnetic dipoles correspond to the width direction of the assembly space, and the electric dipoles correspond to the length direction of the assembly space so as to excite quasi-TM waves in the dielectric waveguide.

The invention provides an electromagnetic scattering modeling method guided by physical information, and relates to the technical field of radar detection and remote sensing imaging, and the method comprises the steps: processing the three-dimensional discrete surface information of a target object, and obtaining electromagnetic scattering point cloud data; the method comprises the following steps: establishing an edge according to distance between points and curvature similarity by using electromagnetic scattering point cloud data, and endowing the edge with a weight reflecting near-field coupling strength to obtain a near-field physical sparse graph; constructing an electromagnetic scattering prediction model by using an encoder and a decoder; and based on the residual constraint of the electric field integral equation, training the electromagnetic scattering prediction model by using the near-field physical sparse graph to obtain a trained electromagnetic scattering prediction model, and completing electromagnetic scattering modeling. The problems that an electromagnetic scattering modeling method is high in calculation complexity and a pure data driving method lacks physical consistency are solved.

This invention discloses a wide-temperature-range phase drift adaptive compensation system for a liquid crystal phased array antenna, relating to the field of antenna technology. It includes a distributed temperature sensing network unit for real-time acquisition of two-dimensional temperature field distribution data of the antenna array surface; an online identification unit for online identification of real-time temperature change parameters of the liquid crystal material based on the temperature field distribution data; a multi-physics coupling prediction unit for calculating the expected phase drift of each array element, including the dielectric temperature change phase error, thermal expansion phase error, and driving drift phase error of the liquid crystal layer, based on the temperature field distribution data and real-time temperature change parameters; a pre-compensation unit for pre-calculating the expected phase drift based on the current temperature field distribution and temperature change rate, and pre-adding the compensation amount to the beam control codeword; and an update unit for iteratively updating the model parameters by measuring the residual through the near-field coupling calibration network and feeding it back to the multi-physics coupling prediction unit.

The present invention discloses an over-the-air test device for a multi-antenna wireless device, comprising: a darkroom, the inner walls of which are provided with absorbing material; and multiple coupling probes, each of which is movably disposed within the darkroom and configured to simultaneously or individually couple energy transmission to antennas within a preset near-field radiation range of the current probe's location. The maximum dimension of all metal within a cross-section within 5 centimeters of the probe tip to the feeder line is less than or equal to 5 centimeters, thereby determining the transceiver performance of the multi-antenna wireless device. The test device according to an embodiment of the present invention can employ individual near-field coupling for antennas and simultaneously or individually perform over-the-air testing on antennas within the near-field radiation range, thereby improving both test efficiency and accuracy.

The application relates to a self-adaptive WPT system and method based on a symmetric anti-resonance-resonance, which comprises an anti-resonance-resonance structure, an anti-resonance structure at a transmitting end and a resonant structure at a receiving end, the anti-resonance structure comprises a first resonant unit and a second resonant unit which are coupled to each other, the resonant structure comprises a third resonant unit which can be coupled to the near field of the second resonant unit, the third resonant unit is connected with a load, and the anti-resonance-resonance structure is configured to satisfy; a controllable gain module is connected between a power supply and the anti-resonance structure, and is used for dynamically adjusting the input voltage value transmitted to the anti-resonance structure, so that the system is kept. The application can adaptively track the BIC condition in the mode of adjusting the electrical parameters of the circuit, the control method is simple and easy to realize, and can be used for complex and changeable application scenes.

The application discloses a GNSS side signal injection method and device for a UAV nest and related media, which comprises coordinate matching correction on dynamic positioning data, triggering the injection module to perform power-on self-test to inject test signals and detect loss, setting initial gain, performing near-field coupling injection on GNSS side signals received by the nest side, and dynamically adjusting the relay gain to a target interval according to a preset closed-loop adjustment algorithm to obtain gain optimization data; performing steady-state determination on the gain optimization data, respectively determining take-off release and coupling removal, and integrating output reset learning data. The application sets the initial gain and injects the GNSS side signals received by the nest side in a near-field coupling mode to enhance, finally determines the take-off release and coupling removal in combination with take-off transition data through a series of calculations, and outputs reset learning data, so that the satellite signal receiving capability of the UAV is effectively improved without changing the UAV body structure.

The invention relates to a quantum sensing microsystem and method. Comprising optical coupling between a light source and a grating coupler, integration of the grating coupler on a main optical waveguide, evanescent field coupling between the main optical waveguide and a diamond NV color center, near-field coupling between the main optical waveguide and an optical filter, and evanescent field coupling between the optical filter and a photodiode. The light source is used for emitting laser and enabling the laser to enter the grating coupler; the grating coupler is used for transmitting the laser to the diamond NV color center through the main optical waveguide, and the diamond NV color center emits fluorescent light according to laser excitation; the optical filter is used for filtering laser and coupling fluorescence to the photodiode through an evanescent field; the photodiode is used for generating a corresponding digital signal based on the fluorescence, and the digital signal is used for calculating a magnetic field measurement result of the to-be-measured magnetic field where the quantum sensing microsystem is located. According to the invention, the size of the quantum sensing system can be reduced.

The application provides a fault signal detection system and analysis positioning method, relates to the technical field of signal detection, and periodically applies a narrow-band acoustic disturbance with adaptive frequency selection and power at the optical cable sheath by using an injection module; a passive wireless tag node arranged along the line collects multi-dimensional data such as time stamp, amplitude, frequency, phase and local temperature in real time, and uploads the data through near-field coupling. The gathering module completes node identification association and batch aggregation, the analysis and construction module constructs an acoustic propagation path map, and the graph search algorithm is used to dynamically recover the actual laying path after temperature difference segmentation compensation. The projection and identification module maps the map to the geographic information system coordinate system, outputs the fault space position, realizes real-time and accurate optical cable fault positioning without topological prior conditions, significantly reduces manual inspection and misjudgment rate, and is suitable for long-distance communication or power optical cable scenes with multiple branches and multiple repairs.

This invention discloses a terahertz biosensing metasurface based on the Jones singularity, belonging to the field of terahertz metasurface technology. The metasurface comprises two orthogonally oriented metal open-loop resonator arrays and a dielectric spacer layer between the two layers. By making the upper layer's opening width L1 different from the lower layer's characteristic dimension L3, the two orthogonal polarization modes have different ohmic loss rates. Simultaneously, the interlayer near-field coupling strength is controlled by an in-plane displacement L2. When the combination of these two factors causes a cross-polarized transmission component of the Jones transmission matrix under circularly polarized basis vectors to drop to zero at the target frequency, the system is locked at the Jones singularity. This invention utilizes the square root topological enhancement of the second-order branch point, and the device exhibits highly sensitive intrinsic transmission amplitude splitting at the singularity to weak dielectric perturbations, making it suitable for label-free, ultrasensitive biosensing.

The application discloses a short offset transient electromagnetic method super-deep detection system and a signal analysis method, relates to the technical field of geological detection, and comprises a signal receiving and collecting adaptive module, an original signal preprocessing module, a geometric effect correction and deep gain reconstruction module, a layered response separation module, an inversion imaging and prior constraint module and an analysis result output and visualization module. The near-field coupling, amplitude and phase distortion and deep energy attenuation caused by the short offset are systematically compensated through the quantitative geometric effect correction and the depth self-adaptive gain reconstruction. The mechanism not only synchronously recovers the late and weak amplitude signal in the time domain and the phase domain, but also maintains the amplitude and phase consistency, ensures the use of the homologous and comparable data input for the subsequent layered separation and inversion, and fundamentally expands the applicability of the short offset transient electromagnetic method to the super-deep target. Compared with the method of increasing the transmission or expanding the array, the scheme can stably extract the deep response when the equipment and the field layout are limited, and fundamentally expands the applicability of the short offset transient electromagnetic method to the super-deep target.

The invention discloses a multiband tunable electromagnetic induction-like transparent metamaterial and application, and belongs to the technical field of electromagnetic induction transparent metamaterials. The multiband tunable electromagnetic induction-like transparent metamaterial comprises a plurality of periodically arranged structural units, each structural unit comprises a substrate, a graphene metasurface is arranged on the upper surface of each substrate, and each graphene metasurface comprises a rectangular resonator, a first split-ring resonator and a second split-ring resonator. The second split-ring resonator is located between the first split-ring resonator and the rectangular resonator, and the bottom of the second split-ring resonator is nested in the first split-ring resonator; the rectangular resonator, the first opening resonance ring and the second opening resonance ring generate three similar electromagnetic induction transparent windows in the terahertz wave band through the near-field coupling effect. According to the multiband tunable electromagnetic induction-like transparent metamaterial and the application, three high-transmittance transparent windows are generated in a terahertz wave band, a remarkable slow light effect is achieved, and the transmission amplitude, the center frequency and the slow light effect of the transparent windows are adjusted by adjusting the Fermi level of graphene.

The invention relates to the technical field of wireless communication, in particular to a dual-frequency broadband onboard IFA antenna based on tail end coupling splitting, which comprises a low-frequency radiation branch knot, a high-frequency radiation branch knot and a short-circuit branch knot grounding part connected with the low-frequency radiation branch knot, wherein the short-circuit stub grounding is responsible for adjusting impedance and optimizing antenna performance; the tail end of the low-frequency radiation branch knot is located in an area adjacent to the tail end of the high-frequency radiation branch knot, the low-frequency radiation branch knot and the high-frequency radiation branch knot form strong electromagnetic near-field coupling in a resonance area, high-frequency current is enabled to generate controllable splitting at the tail end of the branch knot, a double-tip current distribution mode is formed, and a low-frequency branch knot-high-frequency branch knot space near-field coupling relation is constructed in a geometric tail end area. And the high-frequency current forms double-tip distribution through a tail end coupling splitting mechanism, multi-mode superposition of a main high-frequency resonant mode and a split parasitic mode is generated, the high-frequency bandwidth can be improved without additional parasitic branches, and the high-frequency band coverage requirement is met.

The application belongs to the technical field of medical apparatus and instruments, and discloses a non-contact tumor cell in-vitro screening device and method, which comprises a wireless radio frequency probe built-in wideband radio frequency transceiver antenna unit, a multi-stage adjustable impedance matching network, a near-field coupling radiation structure and a radio frequency detection circuit, which are used for transmitting 1MHz-100GHz frequency band electromagnetic waves and synchronously receiving echo signals and near-field scattering signals; a signal processing system is connected with the wireless radio frequency probe and is used for pre-processing and feature extraction of the dual-mode signals; a control unit is internally provided with an AI fusion system, which is used for feature fusion analysis of the pre-processed dual-mode signals and outputs a benign and malignant determination result; the AI fusion system comprises an IC-CF-DMAS image reconstruction module, a one-dimensional convolutional neural network module, a cross-attention fusion module, a weighted voting decision module and a classification head, realizes deep interaction and accurate determination of cross-modal features, and realizes low cost, no radiation, rapidness, non-invasiveness, portability and high accuracy of early tumor screening.