204 results about "Spherical wave" patented technology

A flying-over beam pattern scanning hologram microscope device includes: a scan beam generation unit which converts a first beam and a second beam to a first spherical wave and a second spherical wave, and then allows the first and second spherical waves to interfere with each other to form a scan beam; a scanning unit, which comprises a scan mirror for controlling the scan beam in the horizontal direction, and a translation stage for moving an object in the vertical direction at the rear end of the projection unit; the projection unit projecting the scan beam onto an object plane; and a light collection unit for detecting a beam that has passed through the objective lens again after fluorescing or being reflected from an object.

The invention relates to a spherical wave oscillation-slow nuclear high-order decoupling method and device for physical property inversion, and belongs to the field of geophysical detection and acoustic detection. The method comprises the following steps: obtaining and inputting observation data, and initializing seabed elastic parameters; determining an integral interval according to the observation data, decomposing the integral interval into a plurality of sub-intervals, and setting a decoupling order; calculating an oscillation nuclear local integral matrix of each order corresponding to the observation data incident angle; calculating the angle deviation guiding quantity of each order of the slowly-varying kernel; calculating a reflection coefficient vector of each order of spherical wave; calculating a spherical wave reflection coefficient of high-order decoupling; and solving a subsequent inversion problem by using the obtained high-order decoupled spherical wave reflection coefficient. According to the method, the calculation efficiency of the seabed spherical wave reflection coefficient in the inversion process is effectively improved; the decoupling order is improved, the calculation precision is improved, or the number of the subintervals can be reduced by improving the decoupling order under the condition that the calculation precision is certain.

The invention relates to a seabed elastic parameter inversion method, system and device under an earthquake spherical reflection wave oscillation-gradual change nuclear decoupling framework, and belongs to the field of geophysical detection and acoustic detection. The method comprises the following steps: (1) inputting observation data and initializing seabed elastic parameters; (2) determining an integral interval and decomposing the integral interval into a plurality of sub-intervals; (3) calculating an oscillation nuclear local integral matrix corresponding to the incident angle of the observation data; (4) calculating a slowly-varying kernel local mean vector; (5) calculating a spherical wave reflection coefficient of oscillation-gradual change kernel decoupling; and (6) constructing a target function by using the decoupled spherical wave reflection coefficient, and solving the target function. In the objective function solving process, only the steps (4) and (5) need to be repeatedly executed after the seabed elastic parameters are updated, the oscillation nuclear local integral matrix in the step (3) does not need to be repeatedly calculated, redundant calculation about oscillation nuclear integration is avoided, and the calculation efficiency is improved.

Disclosed are a system and a method for a high-speed performance measurement. The system includes: a fixing part; a positioner for controlling the rotation of the equipment by controlling the fixing part; a measurement probe; a curved reflective plate for reflecting, in the direction of the measurement probe, an electromagnetic wave radiated by the equipment and transforming the spherical wave of the measurement probe into a plane wave at the position where the equipment is provided; an arc structure including an arc arranged to be adjacent to the fixing part; a probe set including near-filed probes arranged to be spaced predetermined intervals apart from each other on the inner side of the arc; and a control unit, which receives, through a signal analyzer, signal data corresponding to an input signal from some of near-filed probes and the measurement probe.

The invention provides a near-field electromagnetic source positioning method based on array signal processing, and relates to the technical field of electromagnetic signal detection and positioning, and the method comprises the steps: constructing an array receiving signal model based on the wave-front characteristics of an electromagnetic wave spherical surface, and employing a steering vector for the construction; a sensor array is used for collecting near-field radiation source signals, and amplitude calibration processing is carried out on the near-field radiation source signals to form an array data set. According to the near-field electromagnetic source positioning method based on array signal processing, high-precision three-dimensional positioning of a near-field electromagnetic source is realized by combining amplitude calibration, characteristic decomposition and joint optimization processing through an array receiving signal model based on electromagnetic wave spherical wavefront characteristics. According to the near-field electromagnetic source positioning method based on array signal processing, a multi-dimensional optimization strategy is introduced in the signal subspace extraction and parameter estimation process, the estimation precision of the distance, the pitch angle and the azimuth angle is improved, and the positioning stability and robustness in a complex electromagnetic environment are improved.

The invention relates to the technical field of sensor sensing, and discloses a microspur sensing method and system for an MEMS ultrasonic sensor array, and the method comprises the steps: carrying out the phase calibration of the MEMS ultrasonic sensor array, and obtaining a phase calibration parameter; performing near-field spherical wave phase compensation on the phase calibration parameter based on the macro target distance and the incident angle to obtain a near-field compensation parameter; controlling the MEMS ultrasonic sensor array to execute beam forming of wide beam scanning and narrow beam focusing according to the near-field compensation parameter to obtain a macro focusing sound field; transmitting ultrasonic waves to a rear vehicle target through the micro-distance focusing sound field and receiving a reflection signal, and performing vehicle feature recognition on the reflection signal to obtain a vehicle recognition result; and positioning calculation of the target angle and distance is carried out based on the vehicle identification result to obtain rear vehicle positioning data, and the angle resolution and the distance measurement precision in a microspur range are improved.

The invention relates to a multi-beam switching antenna applied to a wind finding radar and a working method of the multi-beam switching antenna. The antenna comprises a connecting device, a feed device and a lens device, the connecting device is a subminiature push-in connector, the input end of the connecting device is connected with the wind finding radar, and the output end of the connecting device is connected with the feed device; the feed device comprises a GCPW-SIW conversion structure and a feed source antenna. Wherein the feed source antennas are sixteen antipodal Vivaldi antennas and are used for radiating spherical waves to the lens device; the lens device is a metasurface lens, and the feed device and the lens device are arranged in an offset-focus mode. Therefore, phase compensation is carried out on spherical waves radiated by a feed device located at the focus of the lens, and the spherical waves are converted into plane waves of the emergent surface of the lens. Compared with the prior art, the method has the advantages that the actual application requirement of a wind measurement radar system is met, and accurate wind field measurement and data acquisition are achieved.

The invention discloses a spherical near-field antenna measurement method and system, and the method comprises the steps: generating a sampling point coordinate sequence on a measurement spherical surface based on a preset algorithm, and enabling the sampling point coordinate sequence to form a continuous spiral track from a first pole to a second pole; controlling the measuring probe to move at a constant speed along the continuous spiral track, and synchronously acquiring near-field complex electric field data of the to-be-measured antenna when the measuring probe moves to each sampling point to form a complex electric field data vector; constructing a linear equation of spherical wave expansion based on the complex electric field data vector, the sampling point coordinates and the measured spherical radius, and solving the linear equation by adopting a regularization method to obtain a spherical wave coefficient vector; and calculating a far-field pattern of the to-be-tested antenna based on the spherical wave coefficient vector. According to the invention, the technical problems of high sampling redundancy, discontinuous mechanical scanning path, dependence on interpolation and low precision in the existing antenna measurement technology are solved.

A flying-over beam pattern scanning hologram microscope device includes: a scan beam generation unit which converts of a first beam and a second beam to a first spherical wave; a scanning unit, which includes a spatial modulation scanner for controlling the scan beam in the horizontal direction, and a translation stage for moving an object in the vertical direction at the rear end of the projection unit; the projection unit projecting the scan beam onto an object plane; and a light collection unit which detects a beam that has passed through the objective lens again after being reflected or fluoresced from the object.

A seismic energy estimation method based on generalized spherical wave propagation, relating to the field of earthquake engineering. The method comprises: determining initial seismic total energy and seismic power on the basis of seismic source characteristics and a seismic magnitude; determining a generalized spherical wave equation, and calculating an average energy flow density of propagated waves on the basis of the wave equation of spherical waves; using an earth surface spherical crown, which is projected on the zone of a seismic source surface, as a main impact zone of seismic spherical waves on an earth surface, the main impact zone being equivalent to a square and performing grid division, and calculating the hypocentral distance between the center of each grid and the center of a seismic source so as to form a hypocentral distance matrix; and expressing the generalized spherical wave energy flow density of each grid as the sum of the energy flow density of longitudinal waves and the energy flow density of transverse waves, performing grid subdivision, estimating the average amplitude of each subdivided grid mass unit within a seismic action period, and evaluating the seismic action energy of a site. The present invention estimates the action of seismic energy on the earth surface by defining the generalized spherical wave propagation of seismic source energy, thereby more accurately evaluating the distribution condition of seismic energy on the earth surface.

The invention belongs to the field of optical measurement and detection, and particularly relates to a coherence tomography wavefront measurement device and method based on optical fiber interconnection and point diffraction, the measurement device separates a fundamental mode and a high-order mode of test light through a few-mode optical fiber, the fundamental mode generates a reference spherical wave through point diffraction to serve as reference light, and the high-order mode serves as the test light; after the test light and the reference light are subjected to optical fiber coupling interference, an interference pattern is obtained by a detector, and wavefront error measurement and optimization are realized through wavefront calculation and correction. The method has high precision and high stability, and can realize rapid closed-loop feedback correction.

This invention provides a near-field millimeter-wave codebook generation method and related components. The near-field millimeter-wave codebook generation method is applied to a near-field hierarchical communication beamcodebook system. The method includes: obtaining the level number of the codebook at the current level in the near-field hierarchical communication beamcodebook system; determining the codebook level of the current level according to the relationship between the level number and a preset level, wherein the codebook level includes an upper-level codebook and a lower-level codebook; and obtaining a near-field millimeter-wave communication codebook based on the codebook level of the current level. The near-field millimeter-wave codebook generation method provided by this invention considers the characteristics of the spherical wavefront in the near-field region, avoids performance degradation, and achieves coverage of the entire Fresnel region. It designs a lower-level codebook covering polar coordinates and an upper-level codebook designed to reduce beam search overhead.

The application discloses a near-field strong interference suppression method based on spherical wave deconvolution beam forming positioning, which comprises the following steps: performing fine grid division on a near-field scanning area of a linear array; performing spherical wave focusing beam forming on the near-field scanning area and two-dimensional deconvolution beam forming about distance-angle under the condition of unknown sound source position; calculating the distribution entropy characteristics of the deconvolution beam forming result in the angle dimension, and using a preset threshold to correlate the interference positioning of a target; constructing an array flow pattern matrix A of each near-field target l and generating a covariance matrix A; calculating the orthogonal complement space projection matrix of the covariance matrix A, and applying the orthogonal complement space projection matrix to the array element domain covariance matrix C to perform near-field interference suppression; using a far-field plane wave model to perform deconvolution beam forming calculation on the covariance matrix for suppressing near-field interference, so as to obtain passive detection results of the near-field strong interference suppression. The application can realize near-field interference positioning and interference suppression under the condition that the interference position is unknown.

The present invention relates to a fly-by light beam pattern scanning hologram microscope apparatus using a scanning mirror and a transfer stage. The present invention provides a fly-by light beam pattern scanning hologram microscope apparatus, comprising: a scanning light beam generating unit modulating a phase of a first light beam separated from a light source to convert the first light beam into a first spherical wave through a first lens, converting a second light beam into a second spherical wave through a second lens, and then making the first spherical wave interfere with the second spherical wave to form a scanning light beam; a scanning unit including a scanning mirror for controlling the scanning light beam in a horizontal direction to transmit it to a projection unit and a transfer stage for moving an object in a vertical direction at a rear end of the projection unit; a projection unit including a plurality of lens systems and an objective lens and projecting the scanning light beam transmitted from the scanning unit on an object plane; and a light collecting unit for detecting a light beam that has passed through the objective lens again after fluorescing or reflecting from the object, wherein the scanning light beam projected on the object plane has different patterns according to a conical angle condition and a focal point position of each of the first spherical wave and the second spherical wave formed on the scanning mirror.

The utility model discloses a light interference and diffraction experiment device, which comprises a laser transmitter and a first experiment part, the first experiment part comprises an interference instrument and a diffraction instrument; the interference device is of a thin sheet structure with uniform thickness, can be arranged on a propagation path of a laser beam, and divides the laser beam incident to the interference device into two emergent beams, so that the interference phenomenon of light is observed; the diffraction instrument can be arranged on the propagation path of the laser beam, one half of the laser beam entering the diffraction instrument is shielded, and the other half of the laser beam forms a spherical wave at the edge of the diffraction instrument, so that the diffraction phenomenon of light is observed. According to the utility model, the first experiment part can reproduce a Young's double-slit interference experiment and a Fraunhofer single-slit diffraction experiment only by using a flat sheet under the condition that double slits and single slits are not needed, and can intuitively show physical mechanisms such as wave splitting surfaces and wave surface limitation; and experiments of circular hole diffraction, cross diffraction, Poisson bright spots and the like can be demonstrated.

The invention provides a curved surface polarization torsion reflecting surface and an antenna using the same, and belongs to the technical field of antennas. The curved surface polarization torsion reflection surface comprises a curved surface dielectric plate, and a metal bottom plate and an electromagnetic metasurface which are respectively arranged on the outer side and the inner side of the curved surface dielectric plate; the electromagnetic metasurface is formed by periodically arranging a plurality of single-layer electromagnetic metasurface units. The single-layer metasurface unit with the polarization torsion function is conformal on the curved surface, so that the technical problems that a traditional multi-layer planar polarization torsion structure is complex to process, curved surface conformal is difficult, and the performance is deteriorated after conformal are solved. The reflecting surface is preferably a paraboloid, so that the incident wave polarization torsion is realized, and the spherical wave can be converted into the plane wave to improve the antenna gain. The metasurface unit keeps good cross polarization reflection performance within the wide incidence angle range of 0-40 degrees, is suitable for curved surface conformal design, can be integrally formed through 3D printing, and is easy and convenient to machine and stable in performance.

The present application belongs to the field of rail transit wireless communication technology, and discloses a subway Wi-Fi 7 signal coverage system and method based on kneading antenna, the system comprises: a medium waveguide arranged along a subway tunnel, a kneading antenna movably attached to the medium waveguide, a Wi-Fi 7 access point connected to the medium waveguide, and a control unit. The method comprises: obtaining the position of a user terminal and establishing a channel based on a near-field spherical wave model; the control unit executes a joint optimization algorithm to calculate the optimal kneading antenna position and digital beamforming matrix; the kneading antenna is controlled to move to the optimal position, and the access point transmits signals using the optimal beamforming matrix. The present application moves the kneading antenna to a position close to the user, combines the low-loss transmission characteristics of the medium waveguide, shortens the wireless propagation distance of high-frequency signals, and realizes precise coverage of mobile users through perception-driven dynamic position reconstruction and joint beamforming, thereby improving the quality of train-ground communication.

This application discloses a method, apparatus, device, and medium for self-calibration of an ultrasonic sensor for transformers. The method involves obtaining the spatial distance by using the time difference and measured sound velocity of the same partial discharge pulse received by a built-in UHF antenna and an external ultrasonic sensor; constructing a cross-medium model based on the acoustic parameters of the insulating oil and the tank to calculate the sound pressure transmission coefficient at the liquid-solid interface; constructing a spherical wave dissipation equation in viscous oil by combining discharge and fluid parameters, and calculating the theoretical sound pressure of the outer shell using the distance and transmission coefficient; comparing the measured peak output voltage of the external sensor with the in-situ acoustic-electric conversion sensitivity for online self-calibration. This method reconstructs a high-fidelity sound wave propagation attenuation model, which can improve calibration accuracy and diagnostic reliability.

The invention discloses an infrared super lens with a moth eye imitating anti-reflection nano structure. The moth-eye anti-reflection metasurface, the metasurface lens and the substrate are all made of silicon materials, and the moth-eye anti-reflection metasurface and the metasurface lens are micro-nano-scale arrays and are located on the two sides of the same substrate respectively. According to the invention, the metasurface is fully utilized to finely and efficiently modulate the phase, amplitude and other characteristics of light waves, the moth-eye metasurface changes the effective refractive index of the surface and reduces the reflectivity of incident light on the silicon surface, the metasurface lens enables the phase distribution to meet the spherical wavefront contour, efficient focusing of emergent beams is realized, and the light quality is improved. All micro-nano structures have the advantage of good thermal stability based on the same substrate material, and anti-reflection and focusing effects are achieved in an extremely thin scale.

The invention discloses an antenna regulation and control method based on collaborative design of a gradient refractive index dielectric lens and a hyperbolic reflecting surface, and belongs to the technical field of communication, and the method comprises the following steps: S1, collaborative design of the gradient refractive index dielectric lens and the hyperbolic reflecting surface: designing the gradient refractive index dielectric lens, spatial shaping is carried out on a wavefront phase by utilizing the characteristic of a non-uniform material, so that accurate regulation and control on electromagnetic waves are realized; a hyperbolic reflecting surface is designed, and spherical waves radiated by a feed source are efficiently converted into collimated plane waves by using geometric focusing characteristics of the hyperbolic reflecting surface; s2, optimizing and integrating an antenna structure; s3, data collection and preprocessing; s4, constructing and training a deep learning beam optimization algorithm; s5, applying a beam optimization algorithm and performing real-time regulation and control; according to the invention, through collaborative design and a deep learning algorithm, the technical bottleneck of a traditional antenna is broken through, the main lobe gain and the pointing precision are remarkably improved, the side lobe interference is reduced, and the antenna is suitable for scenes such as satellite communication and high-precision navigation and is compatible with various communication standards.

The application discloses a low-profile wave beam regulation millimeter wave antenna loaded with Huygens super surface, which comprises a non-biased substrate integrated waveguide slot array antenna and a near-field Huygens super surface; the non-biased substrate integrated waveguide slot array antenna is composed of a first dielectric substrate, metal structures printed on the top and bottom of the first dielectric substrate, a slot array etched on the metal structures and metal through holes in the first dielectric substrate; the near-field Huygens super surface comprises a second dielectric substrate and metal structures on the top and bottom of the second dielectric substrate; the non-biased substrate integrated waveguide slot array antenna serves as an excitation source to provide a spherical wave, and the near-field Huygens super surface is used for precisely regulating the phase distribution above the slot array antenna. The application has the characteristics of low profile and can realize two-dimensional wave beam regulation based on different super surface distributions.

The application discloses a crimped cylindrical wave tight field device, which mainly comprises a crimped parabolic cylindrical reflector, a feed source, a quiet zone and a virtual line source. The parabolic cylindrical reflector can correct the cylindrical wave formed by the spherical wave emitted by the feed source in the quiet zone. In order to control the diffraction of the edge of the reflector, the edge of the parabolic cylindrical reflector needs to be processed. The crimped edge of the parabolic cylindrical reflector can reduce the low-frequency limit of the cylindrical wave tight field. Compared with the sawtooth cylindrical wave tight field, the electric size of the reflector working at the low-frequency limit is smaller, and the engineering realization of the large cylindrical wave tight field is more favorable.

The invention discloses a super-large-scale MIMO communication system, a user scheduling method thereof and a medium, and relates to the technical field of MIMO communication systems.The method comprises the steps that a channel model containing a spherical wave propagation model is established in a near-field communication scene, and the near-field propagation characteristic that the antenna array size is equivalent to the user distance is considered; obtaining a beam focusing vector of the user based on a channel model; calculating to obtain beam focusing vectors and correlation between the beam focusing vectors; using an alternative optimization algorithm to jointly optimize user scheduling and power distribution, including grouping the users based on the correlation, so that the users in each group have similar channel conditions; and the total spectrum efficiency of the system is maximized under the condition that the minimum spectrum efficiency constraint and the total transmitting power constraint are met. According to the invention, interference among users can be effectively reduced, and the accuracy and efficiency of user scheduling can be improved by an alternative optimization scheduling method.

Methods and systems for spatial filtering transmitters and receivers capable of simultaneous communication with one or more receivers and transmitters, respectively, the receivers capable of outputting source directions to humans or devices. The methods and systems use spherical wave field partial wave expansion (PWE) models for transmitted and received fields at antennas and for waves generated by contributing sources. The source PWE models have expansion coefficients expressed as functions of directional coordinates of the sources. For spatial filtering receivers a processor uses the output signals from at least one sensor outputting signals consistent with Nyquist criteria representative of the wave field and the source PWE model to determines directional coordinates of sources (wherein the number of floating point operations are reduced) and outputs the directional coordinates and communications to a reporter configured for reporting information to humans. For spatial filtering transmitters a processor uses known receiver directions and source partial wave expansions to generate signals for transducers producing a composite total wave field conveying communications to the specified receivers. The methods and communications reduce the processing required for transmitting and receiving spatially filtered communications.

The invention provides an ISAC near-field channel robust beam forming optimization method and device based on MMSE estimation. The method comprises the following steps: carrying out system modeling and signal configuration on an ISAC system; accurately modeling a near field communication channel by adopting a spherical wave model, calculating to obtain an SINR (Signal to Interference plus Noise Ratio) of a user, and introducing an outage probability constraint; establishing a sensing model under a far-field condition, and estimating a target response matrix by adopting an MMSE criterion to obtain a sensing MSE; introducing an enhanced waveform to improve the perception DoF, and updating the SINR; an enhanced covariance matrix is introduced, the minimum perception MSE is used as an optimization target, the outage probability constraint, the total power constraint and the positive semi-definite constraint updated according to the updated SINR are used as constraint conditions, and an ISAC near-field channel robust beam forming optimization problem is constructed; a non-convex problem is converted into a convex form through combination of semi-definite relaxation SDR and an optimization framework of a spherical boundary and S-lema, and a beam forming optimization matrix is solved and obtained by obeying the constraint of a linear matrix inequality LMI. According to the invention, beam forming can be optimized.

A low-overhead positioning method assisted by an intelligent metasurface under the mixed-field beam offset effect belongs to the field of perception in wireless communications. The present invention uses a polar coordinate domain dictionary to add distance factors to the dictionary elements, optimizes the mismatch problem between the traditional discrete Fourier transform dictionary and the near-field spherical wave, and reduces the adverse effects of spectrum leakage on positioning performance; by using a frequency-dependent dictionary, different subcarriers are considered separately in the dictionary, optimizes the beam offset effect, and improves positioning accuracy; with the assistance of an intelligent metasurface, the arrival time difference is used to solve the problem of inaccurate user positioning caused by the common timing deviation, and at the same time locks the user on the hyperbola, reducing the computational complexity brought by the full-domain search; the polar coordinate domain gradient descent algorithm is used to optimize the angle at which the user arrives at the base station, and optimizes the problem of being unable to accurately estimate the angle when the distance estimate is not completely accurate. The present invention is applicable to fields such as communications and emergency rescue, and is used to improve user positioning accuracy.

The invention discloses a holographic MIMO near-field channel estimation method based on a spatial correlation matrix, and the method comprises the steps: carrying out the modeling of a 3D H-MIMO channel based on a non-uniform spherical wave model, and building an H-MIMO near-field channel model; calculating a spatial correlation coefficient between antenna units at a base station end, introducing a generalized single-ball scatterer model, and deducing to obtain a near-field spatial correlation matrix; eigenvalue decomposition is carried out, and a low-dimensional signal subspace is constructed; designing a pilot frequency matrix, wherein the pilot frequency time slot number in the pilot frequency matrix is set as the rank of the low-dimensional signal subspace; and estimating the low-dimensional signal subspace coefficient to obtain a channel estimator of the low-dimensional signal subspace. According to the channel estimation method, spatial correlation prior information is effectively utilized, and the pilot frequency overhead and the calculation complexity are remarkably reduced.

The application relates to the field of wireless communication, in particular to a near-field spherical wave ultra-large-scale MIMO uplink signal detection method. In a near-field spherical wave model system, the uplink signal detection specifically comprises the following steps: dividing a receiving antenna array into C non-intersecting subarrays, taking each array as a factor node and the sending signal of each user as a variable node to construct a factor graph model; according to the factor graph model, the approximate posterior distribution of the sending signal of a user on a subarray is calculated; based on a sorting interference cancellation algorithm, the receiving signal and the channel matrix of each subarray are iteratively updated to complete signal detection. In a multi-user near-field scene, the application can obtain better performance, and in the face of a scene where multiple users arrive at the same angle but have different distances to the array center, the application can still maintain relatively optimal detection performance.

The present application belongs to the field of photoelectric precision manufacturing technology, and discloses an intelligent method for detecting and adjusting basic light waves. The whole system structure contains a detection or control unit. The relative positions of various components are obtained by the initial position and the moving distance of the components. The component position is moved by a servo motor. The light intensity or interference fringe information is received by a CCD to judge the light wave condition, and the light wave collimation state is automatically detected. The required diverging spherical wave, converging spherical wave or plane wave is obtained by adjusting the internal optical device position through a computer, and no human intervention is required. The wave surface curvature radius can be reproduced and adjusted to provide the required spherical wave or plane wave. These are all conducive to providing accurate illumination light sources for various optical systems. The analysis of the CCD interference fringes in the system, combined with the detection and control of the positions of various components, is completely analyzed and calculated by a computer program before being controlled, so as to realize the adjustment without human intervention, thereby realizing the intelligence of the instrument.

The invention relates to the technical field of wireless communication, in particular to an antenna radiation unit and an antenna, the antenna radiation unit comprises a radiation unit body and a phase adjusting structure arranged above the radiation unit body, and the phase adjusting structure is a metal ring array formed by arranging a plurality of metal ring units in an array mode. The spherical wave conversion module is used for converting the spherical wave emitted by the radiation unit body into a plane-like wave to realize beam convergence; the metal ring array is composed of multiple stages of metal ring sub-arrays which are concentrically arranged, the sizes of the metal ring units of all stages from inside to outside are gradually increased, the electromagnetic wave phase can be accurately regulated and controlled, spherical waves are converted into plane-like waves, beam broadening and narrowing can be effectively achieved while S parameters are not affected, the requirements of different wave widths are met, and the application range is wide. The performance of the radiation unit is improved, and the antenna directivity and radiation efficiency are significantly improved.