78 results about "Dielectric lens" patented technology

The invention provides a three-dimensional holographic imaging method. The method comprises the following steps: loading a holographic pattern to be imaged to a spatial light modulator; modulating a preset laser source by using a spatial light modulator loaded with a holographic pattern to form a first wavefront with initial phase information; carrying out primary scattering on the first wavefront by adopting a first turbid medium lens to form a second wavefront; compensating the second wavefront by adopting a metasurface compensation unit to form a third wavefront; after a second turbid medium lens is adopted to carry out secondary scattering on the third wavefront, a holographic imaging system is utilized to carry out imaging; wherein the metasurface compensation unit is determined according to a transmission matrix of the first turbid medium lens and a transmission matrix of the second turbid medium lens. The imaging view angle can be effectively increased, and the space bandwidth product can be improved.

The invention discloses a dielectric lens and a dielectric lens antenna. The dielectric lens comprises B lens units, the B lens units are distributed in an array to form a lens array which is square on the whole, the middle part of the lens array is circular, the lens units distributed at the edge position of the array are higher than the lens units distributed at the circular position in the middle of the array, and the middle position of the lens unit array forms a circular concave cavity. The whole lens unit is a cuboid and comprises two impedance matching layers and a square dielectric cylinder, and the two square end faces of the square dielectric cylinder are connected with the impedance matching layers respectively. And four cube-shaped through holes are symmetrically formed in the middle of the impedance matching layer. The dielectric lens antenna comprises the dielectric lens and a feed source antenna, and the feed source antenna is arranged on one side of the dielectric lens and located at the position of an extension line of the geometric center of the dielectric lens. The dielectric lens provided by the invention has relatively high transmissivity, and the dielectric lens antenna has more excellent gain performance, broadband coverage and relatively low production cost.

The invention relates to the technical field of antennas, in particular to a millimeter wave three-beam all-dielectric lens antenna, which comprises a group of 2 * 2 magnetoelectric dipole array antennas and an all-dielectric circular lens structure, the 2 * 2 magnetoelectric dipole array antenna is used as a feed source and is arranged on the plane side of the all-dielectric circular lens structure, and the feed source directly faces the geometric center of the all-dielectric circular lens structure; the all-dielectric circular lens structure has a direction-controllable three-beam radiation capability; through the reasonable medium structure layout, the multi-beam coverage and the frequency point adaptability are considered while high-gain output is ensured, and the contradiction between the performance and the practicability of the existing scheme is overcome.

The proposed dielectric beamformer may be used to provide beam-forming of a transmitted radio-frequency (RF) signal. The dielectric beamformer includes a dielectric lens that provides a means of quickly steering a peak beam of the RF signal in a specific direction, allowing tracking of a distant signal, or multiple distant signals. Moreover, the beam of the RF signal can be steered to place a null in a chose direction to reduce interference. The dielectric beamformer includes a dielectric lens, which includes a first layer including a plurality of photo-voltaic (P-V) cells and a second layer including a plurality of piezoelectric cells, and one or more light sources arranged to emit light beams towards the P-V cells of the first layer. The piezoelectric cells are electrically connected to the P-V cells to receive the electricity produced in the P-V cells.

Disclosed is a scanning-array radar device comprising a transmitter and a receiver; wherein the transmitter comprises a first lensed scanning-array transmitter unit comprising: an array of transmit antennas each having a respective output feed spaced apart along a first axis; a radio frequency, RF, integrated circuit, IC, configured to operate with the array of transmit antennas as a scanning-array transmitter, and a lens configured to focus radiation from each of the output feeds; and wherein the receiver comprises a first lensed scanning-array receiver unit comprising: an array of receive antennas each having a respective input feed spaced apart along a second axis; a radio frequency, RF, integrated circuit, IC, configured to operate with the array of receive antennas as a scanning-array receiver, and a lens configured to focus radiation reflected from a target towards each of the input feeds.

The invention aims to provide a medium-loaded ultra-wideband miniaturized double-ridged horn antenna, and belongs to the technical field of double-ridged horn antennas. A dielectric structure loaded on a horn mouth surface in the antenna comprises a dielectric lens, a dielectric flat plate and a dielectric guide section with a specific shape, and through loading of an integrated dielectric structure formed by the dielectric lens, the dielectric flat plate and the dielectric guide section, impedance mutation from a metal waveguide to a free space can be optimized, and reflection is reduced; electromagnetic waves are guided to converge, beam divergence is reduced, and the directivity and gain of a main lobe are improved; meanwhile, the wavefront of the horn mouth electromagnetic wave can be corrected to be a plane wave, phase distortion is reduced, and the far-field directivity is improved; focused electromagnetic waves are refracted, side lobes are reduced, and main lobe gain is improved. The ultra-wide-band miniaturized double-ridge horn antenna has excellent comprehensive performance of ultra wide band, miniaturization, high gain and low side lobe.

An antenna module includes a mounting board with a flat plate shape, and a power supply circuit to supply a radio frequency signal. The power supply circuit is mounted on the mounting board, and a radiating electrode is arranged on the power supply circuit. A dielectric fills a region around the power supply circuit and the radiating electrode. A conductive layer covers at least part of the dielectric. In the dielectric, a lens part is formed at a position overlapping the radiating electrode in plan view of the mounting board. The dielectric includes a first region in which the lens part is formed and a second region other than the first region, and the conductive layer is formed in the second region.

The proposed dielectric beamformer may be used to provide beam-forming of a transmitted radio-frequency (RF) signal. The dielectric beamformer includes a dielectric lens that provides a means of quickly steering a peak beam of the RF signal in a specific direction, allowing tracking of a distant signal, or multiple distant signals. Moreover, the beam of the RF signal can be steered to place a null in a chose direction to reduce interference. The dielectric beamformer includes a dielectric lens, which includes a first layer including a plurality of photo-voltaic (P-V) cells and a second layer including a plurality of piezoelectric cells, and one or more light sources arranged to emit light beams towards the P-V cells of the first layer. The piezoelectric cells are electrically connected to the P-V cells to receive the electricity produced in the P-V cells.

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 present application discloses an artificial dielectric composite body, an artificial dielectric lens and a manufacturing method. The metal layers are located on the front and back sides of the plate, and are distributed in a cross-shaped wire pattern; a foaming material is bonded to the outside of the metal layer. The artificial dielectric composite body is filled in the space formed by the contour of the artificial dielectric lens. The present application solves the problem of high manufacturing difficulty in the prior art method.

The present disclosure relates to an antenna arrangement (200) comprising an antenna port (201) and a dielectric lens device (203). The antenna arrangement (200) comprises a first electrically conducting layer (204) that comprises a first aperture (205) and is separated from the dielectric lens device (203) by a shortest distance (dm) along a vertical extension (v) such that a cavity (206) is formed between the first electrically conducting layer (204) and the dielectric lens device (203), such that a leaky-wave feed is provided. The antenna port (201) is electrically connected to the first aperture (205), wherein the first electrically conducting layer (204) mainly lies in a plane (P) that is perpendicular to the vertical extension (v) and is movable in that plane (P).

The invention relates to an adjustable dielectric lens antenna device and an adjusting method thereof, a transmission screw rod on an adjusting assembly can be rotated manually or electrically to drive a radiation unit to linearly move along the tangential direction of a dielectric lens, so that the relative positions of the radiation unit and a lens assembly in the tangential direction of the dielectric lens are changed, and the dielectric lens antenna device is adjusted. Therefore, the downward inclination angle of the antenna can be quickly adjusted. And one adjusting assembly can simultaneously drive the plurality of radiation units to linearly move along the tangential direction of the dielectric lens, each radiation unit does not need to be adjusted respectively, the overall structure is simple, the space is saved, the cost is lower, and the downward inclination angle of the antenna can be rapidly and accurately adjusted.

An antenna assembly includes a substrate stack 105 comprising a magnetodielectric material, at least one patch radiating element 102 on an upper surface of the substrate stack 105, and a dielectric cover 200 including a gradient lens 204 disposed over the substrate stack 105. The gradient lens 204 includes a first lens portion having a first dielectric constant, DkL1, and a second lens portion having a second dielectric constant, DkL2, different from the first dielectric constant, DkL1.

The utility model provides a high-temperature testing device for a complex dielectric constant in a free space. The high-temperature testing device comprises a dielectric lens, a transmitting antenna, a receiving antenna, a sample bracket, a high-temperature furnace and a vector network analyzer, the vector network analyzer is connected with the transmitting antenna and the receiving antenna through a microwave cable, the phase center of the transmitting antenna / receiving antenna is located at one focus of the dielectric lens, and the sample frame center of the sample support is located at the other focus of the dielectric lens; the two faces, facing the dielectric lens, of the high-temperature furnace are heat insulation flat plates, and heating resistance wires are arranged on the other four faces. According to the testing method, based on the complex dielectric constant and the thickness of the heat insulation flat plate, de-embedding is carried out on the influence of the heat insulation flat plate by adopting a network cascading method. The device has the characteristics of good heating uniformity and high test precision, and can effectively deduct system errors introduced by the heat insulation flat plate of the high-temperature furnace, so that the accuracy of a test result is ensured.

Provided herein are various enhancements for electronically scanned arrays (ESAs) and performance thereof. In an example implementation, an apparatus is provided that includes an ESA and a dielectric lens applied to the ESA. The dielectric lens includes a domed arrangement formed from dielectric material. The dielectric lens advantageously allows beam scan operations performed by the ESA across a directional range to achieve a target performance over a target bandwidth.

A hydraulic cylinder assembly includes a cylinder body, a piston configured to slide within an interior of the cylinder body, and a cylinder head coupled to the cylinder body. The cylinder head includes a cavity, and a bore that extends between the cavity and the interior of the cylinder body. The hydraulic cylinder assembly includes a radar sensing unit disposed within the cavity. The radar sensing unit includes a radar signal emitter and a radar signal detector oriented respectively to emit and detect radar signals through the bore into the interior of the cylinder body. The hydraulic cylinder assembly includes a dielectric lens between the radar sensing unit and the interior of the cylinder body, the dielectric lens having a convex side facing the radar sensing unit and a planar side opposite the convex side facing the interior of the cylinder body.

The application relates to a preparation method of a multilayer dielectric lens and the multilayer dielectric lens, and is applied to the technical field of lenses.The method comprises the following steps: obtaining design parameters of the multilayer dielectric lens; calculating the filling rate of dielectric lens material in a cubic lattice contained by each dielectric layer according to the dielectric constant of the dielectric lens material and the dielectric constant of each dielectric layer; further calculating the side length of a square bottom surface of a hollow cuboid in the cubic lattice contained by each dielectric layer; based on the number of layers of the multilayer dielectric layer, the radius of each dielectric layer, the side length of the lattice and the side length of the square bottom surface of the hollow cuboid in the cubic lattice contained by each dielectric layer, the dielectric lens material is used to be 3D-printed layer by layer from the innermost dielectric layer to the outermost dielectric layer, so that the multilayer dielectric layer is obtained; based on the radius and the central angle of the reflecting layer, the reflecting layer is 3D-printed by using a metal material, and the multilayer dielectric layer and the reflecting layer are assembled to obtain the multilayer dielectric lens.The application can meet the precision requirement of a high-frequency luneberg lens.

This invention discloses a Ka-band focusing array dielectric lens based on impedance matching, comprising several dielectric lens units. Each dielectric lens unit has a three-layer dielectric structure, consisting of a front dielectric substrate, a middle phase modulator, and a rear dielectric substrate, arranged according to the electromagnetic wave incident direction. The dielectric constants of the three dielectric layers are set according to preset conditions. The thicknesses of the front and rear dielectric substrates are set based on the wavelength of the electromagnetic wave in their respective media. The thickness of the middle phase modulator is calculated based on the compensation phase of the lens unit. This invention reduces interface reflection loss by adjusting the thickness of the front and rear dielectric substrates and achieves phase compensation for different dielectric lens units by adjusting the thickness of the middle phase modulator, thereby improving the electromagnetic wave focusing performance.

The low-profile ultra-wideband folding horn antenna comprises a dielectric lens, a horn antenna body and a metal back cavity which are sequentially arranged from top to bottom, the horn antenna body is arranged in the metal back cavity, and the metal back cavity wraps the bottom of the horn antenna body and at least two symmetrically-arranged side walls. According to the invention, the coaxial cable is adopted for direct feeding, and the multiple bent radiation arms are introduced, so that the profile height of the horn antenna is greatly reduced and the antenna structure is simplified; meanwhile, by loading the dielectric lens and the metal side wall, the gain in the working frequency band is remarkably improved, and the dielectric lens and the shielding cover are integrally formed, so that processing and mounting are facilitated. The antenna has the ultra-wideband characteristic, and the low-frequency gain performance is stable; the cross polarization level is lower than-34 dB, the radiation pattern is symmetrical and good in directivity, and the overall radiation performance is stable. The antenna is low in profile, simple in structure, small in size, low in manufacturing cost and capable of meeting the requirements of a 5G communication indoor distribution system.

The present invention relates to the field of millimeter wave antennas, and specifically to a circularly polarized millimeter wave lens antenna device, comprising a base, a dielectric lens, a horn antenna and a feed source; the feed source comprises a first layer of copper foil, a second layer of copper foil, a third layer of copper foil and a fourth layer of copper foil; a microstrip patch antenna is arranged on the first layer of copper foil; a square hole is arranged on the second layer of copper foil; the third layer of copper foil, the fourth layer of copper foil, a dielectric plate C and a metallized blind hole array constitute an L-shaped substrate integrated waveguide; two orthogonal slits are arranged on the third layer of copper foil; a Langer 3dB coupler is arranged on the fourth layer of copper foil, and its 0° / 90° port is connected to both ends of the L-shaped substrate integrated waveguide; the dielectric lens is connected to the base; and the horn antenna is connected to the dielectric plate A. The present invention can realize circular polarization, high gain, narrow beam, low side lobe and wide bandwidth of the antenna to improve the performance of the radar system.

An optical device 1a includes a lens array 10 and a transparent dielectric array 20. The lens array 10 includes a plurality of lenses 11. In the lens array 10, the lenses 11 are arrayed such that the optical axes thereof are substantially parallel to each other. The transparent dielectric array 20 includes a plurality of transparent dielectrics 21. In the transparent dielectric array 20, the transparent dielectrics 21 are arrayed such that the central axes thereof are substantially parallel to each other. The lens array 10 and the transparent dielectric array 20 are arranged such that the optical axes of the lenses 11 and the central axes of the transparent dielectrics 21 are substantially parallel to each other, and that an end surface of the lens array 10 and an end surface of the transparent dielectric array 20 face each other.

This invention discloses a low-profile ultra-wideband folded horn antenna, comprising a dielectric lens, a horn antenna, and a metal back cavity arranged sequentially from top to bottom. The horn antenna is placed within the metal back cavity, which encloses the bottom of the horn antenna and at least two symmetrically arranged sidewalls. This invention employs direct coaxial cable feeding and introduces multiple bent radiating arms, significantly reducing the profile height of the horn antenna and simplifying its structure. Simultaneously, by loading the dielectric lens and metal sidewalls, the gain within the operating frequency band is significantly improved. The dielectric lens and shielding cover are integrally formed, facilitating processing and installation. This antenna exhibits ultra-wideband characteristics, stable low-frequency gain, a cross-polarization level below -34dB, a symmetrical radiation pattern with good directivity, and stable overall radiation performance. This invention's antenna features a low profile, simple structure, compact size, and low manufacturing cost, meeting the requirements of 5G communication indoor distribution systems.

The present invention relates to a radar level measuring device with a housing, wherein the housing can be connected in a sealing manner to an accommodating portion, wherein the housing is configured at the front as a process connection and wherein a dielectric lens is disposed at the front of the housing and connected to the process connection such that the lens is fixed in the axial direction relative to the housing, by a positive connection being formed between the lens and the process connection.

The application discloses an L-band dielectric lens and a lens antenna for satellite multi-beam communication and belongs to the technical field of communication.The lens designed by the application is a cylindrical flat plate lens and is composed of a plurality of concentric circular ring layers.Each circular ring layer is arranged in a circular ring shape around the center by fan ring structure units of the same configuration, and the dielectric constant of each layer gradually decreases from the center to the edge.Compared with a traditional flat plate lens after optical transformation, the lens can realize miniaturization without complex optical transformation, has a simple structure, the lens thickness can be adjusted at will, and the lens can be quickly prepared by using 3D printing.The fan ring structure unit combining the "Y" shape and the circular perforation shape is used as an equivalent dielectric constant model, so that the dielectric constant is closer to the ideal gradient change, and the lens is closer to the ideal effect, so that the lens can be used in the lens antenna, and the working performance is further improved.

The invention provides a level meter. In order to reduce reflected waves causing spurious signal waves in a level meter, the level meter includes a sensor substrate, a radio wave shaping member, a dielectric lens, and a radio wave absorbing member. The radio wave shaping member includes: an element housing covering an internal space including a transmitting unit and a receiving unit mounted on a sensor substrate; a waveguide, one end of which is in electromagnetic communication with the element housing; and a horn having a radio wave path that gradually expands from the other end of the waveguide toward the traveling direction of the transmitted radio waves. The dielectric lens is provided at a front end of the horn and deflects radio waves from the transmitter to an object through the radio wave shaping member. The radio wave absorbing member is disposed along an inner wall of the element housing and absorbs radio waves.

The invention discloses an annular dielectric loaded terahertz high-gain luneberg lens antenna unit and array, the appearance of an upper layer metal structure (A) and a lower layer metal structure (B) of the antenna unit is a semi-circular ring located on one side of a rectangle, the upper layer metal structure (A) covers the lower layer metal structure (B), and the lower layer metal structure (B) covers the upper layer metal structure (A). The stepped disc dielectric lens (C) is located between the upper-layer metal structure (A) and the lower-layer metal structure (B), the annular dielectric lens (D) is located on the outer side of a semicircular ring of the upper-layer metal structure (A) and the outer side of a semicircular ring of the lower-layer metal structure (B), and the two ends of the annular dielectric lens (D) are fixed to the two sides of the lower-layer metal structure (B) through screw hole sites (D3). The stacking spacing of the array is far more than one half of the free space wavelength, so that the processing difficulty can be reduced, and the high-gain radiation characteristic can be effectively realized; the annular dielectric lens is loaded at the tail end of the luneberg lens antenna, so that the grating lobe effect of a large-spacing array can be eliminated, and the original beam scanning capability is reserved.

An image sensor device includes a semiconductor device, a plurality of photo sensitive regions, a dielectric layer, a grid structure, and a plurality of convex dielectric lenses. The photo sensitive regions are in the semiconductor substrate. The dielectric layer is over a backside surface of the semiconductor substrate. The grid structure is over a backside surface of the dielectric layer. The grid structure includes a plurality of grid lines. Each of the grid lines comprises a lower portion and an upper portion forming an interface with the lower portion. The convex dielectric lenses are alternately arranged with the grid lines over the backside surface of the dielectric layer. Apexes of the plurality of convex dielectric lenses are higher than an interface between the upper portion and the lower portion of each of the grid lines.

To provide a lens antenna capable of suppressing the deterioration of plane wave characteristics more effectively than conventional lens antennas.SOLUTION: A lens antenna includes at least a dielectric lens 10 having a spherical shape on at least one side with a circular edge 11 formed around the outer periphery of the spherical shape, and a wave source 30 that radiates radio waves to the dielectric lens 10. Inside the circular edge 11 on the other side of the dielectric lens 10, an annular uneven member 21 is arranged with an uneven portion 211 composed of a plurality of recesses 211B and a plurality of protrusions 211A along the circular edge portion 11.SELECTED DRAWING: Figure 3

The invention relates to the technical field of millimeter wave antennas, and provides a dielectric-lens-based 79GHz high-gain millimeter wave liquid level meter antenna, which comprises a dielectric substrate, a radiation patch, a parasitic patch, an annular directional coupler and a dielectric lens, and is characterized in that the radiation patch is arranged at the central position of the surface of the dielectric substrate; the parasitic patch is arranged on the surface of the dielectric substrate and concentrically arranged around the radiation patch; the annular directional coupler is arranged on the dielectric substrate and is electrically connected with the radiation patch through the microstrip transmission line; and the dielectric lens is arranged above the dielectric substrate and is coaxially aligned with the radiation unit formed by the radiation patch and the parasitic patch. According to the millimeter wave antenna, the working bandwidth is expanded and the radiation efficiency is improved by utilizing the electromagnetic coupling effect of the parasitic patch, the receiving and transmitting channel isolation greater than 25dB is realized by combining the annular directional coupler, and the gain and directivity of the millimeter wave antenna are remarkably improved based on the refraction focusing principle of the dielectric lens; and the antenna can be applied to industrial application scenes of high directivity and long-distance ranging.

Antenna device (U) for transmitting and receiving electromagnetic waves through an externally arranged cover element (B), the antenna device comprising: a first (2a) and a second (2b) antenna section which are arranged adjacent to each other along a direction orthogonal to a predetermined direction in which the electromagnetic waves (Fx1, Fx2) are transmitted, and which respectively transmit the electromagnetic waves (Fx1, Fx2); a first (5a) and a second (5b) dielectric lens which are arranged in the predetermined direction in front of the first and second antenna sections (2a, 2b), respectively, and which respectively narrow the beams of the electromagnetic waves (Fx1, Fx2) transmitted from the first and second antenna sections (2a, 2b) and transmit the beams of the electromagnetic waves (Fx1, Fx2) to the outside, wherein an outer end surface of the first dielectric lens (5a) projects further forward in the predetermined direction than an outer end surface of the second dielectric lens (5b), so that a distance (D1) between the cover element (B) and the outer end surface of the first dielectric lens (5a) in the predetermined direction is shorter than a distance (D2) between the cover element (B) and the outer end surface of the second dielectric lens (5b) in the predetermined direction.