21 results about "Dielectric lens" patented technology

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.

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.

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.

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 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.

The invention discloses a static millimeter wave wide-field dual-polarization superstructure detector for non-interactive personnel security inspection, and belongs to the technical field of detectors. The electromagnetic receiving and transmitting module is used in cooperation with a built-in micro-motion rotary table, a system-level static wide-view-field scanning mechanism is achieved, dynamic time sequence beam deflection can be achieved, and the electromagnetic receiving and transmitting module is a wide-view-field super-structure lens; the built-in micro-motion turntable controls the transmitting and receiving feed antenna of the electromagnetic receiving and transmitting module to regulate and control the direction of millimeter wave transmitting and receiving beams, so that directional signal transmitting and receiving in a large range are realized; the data acquisition module is used for reading the recovered voltage signals converted by the co-polarization and cross-polarization scattering echoes; and the upper computer module is used for analyzing the acquired dual polarization data. The invention aims to replace a heavy and clumsy dielectric lens in a traditional millimeter wave personnel security inspection system, so that the wide-view-field scanning performance is improved while the integration level and the lightweight level of the system are improved.

The invention relates to a radar level measuring device for detecting a level in a container, comprising: a main transmitter for transmitting and receiving radar waves; a dielectric lens for transmitting and receiving the radar waves; a waveguide unit for guiding the radar wave between the main transmitter and the dielectric lens; wherein the dielectric lens and the waveguide unit are arranged at an interval.

The application discloses a medium lens, a radiation unit and a base station antenna, the medium lens is arranged above a vibrator, and the medium lens comprises a spherical body and a support; a beam adjustment cavity is constructed in the spherical body; the upper end of the support is connected with the spherical body, and the lower end of the support is used for fixing; the spherical body and the beam adjustment cavity are configured to: different phase compensations are performed on electromagnetic waves incident in different directions, so that the beams are focused; electromagnetic wave phase compensation and beam focusing are realized through the cooperative design of the spherical body and the beam adjustment cavity, the structural strength, the manufacturing process and the electromagnetic performance are taken into account at the same time, the gain and the comprehensive performance of the base station antenna are significantly improved, and the development requirements of 5G / 6G base station antenna miniaturization, low cost and high consistency are adapted.

The dielectric lens includes a three-dimensional (3D) body of dielectric material having a spatially varying permittivity (Dk), the 3D body having three or more regions R(i) having local maxima of permittivity values ​​Dk(i) relative to surrounding regions of each of the three or more regions R(i), the positions of the three or more regions R(i) being defined by local coordinates of azimuth angle (i), zenith angle (i), and radial distance (i) relative to a particular common origin associated with the 3D body, where (i) is an index ranging from 1 to 3 or more, and the spatially varying Dk of the 3D body is configured to vary as a function of zenith angle between a first region R(1) and a second region R(2) at a given azimuth angle and at a given radial distance.

The application discloses a kind of broadband end-fire antennas applied to X frequency band, including: dielectric substrate, dielectric lens, first radiating patch, second radiating patch, microstrip feed line and ground plane, first radiating patch and microstrip feed line are set on the front surface of dielectric substrate by printing, first radiating patch is electrically connected with microstrip feed line, one end of microstrip feed line is electrically connected with first radiating patch, second radiating patch and ground plane are set on the back surface of the dielectric substrate by printing, dielectric lens is embedded in the upper end of dielectric lens with the upper end surface of dielectric substrate without radiating patch part, the lower end of dielectric lens is provided with rectangular notch, the left and right sides in the rectangular notch of dielectric lens are in contact with the left and right sides of dielectric substrate;The dielectric lens is open cuboid, and the open cuboid is provided with embedded opening.

The invention discloses a high-bandwidth high-gain dual-polarization tapered slot line antenna, and relates to the technical field of antennae, the antenna comprises two tapered slot line antenna units with the same structure, a conical dielectric lens and a plurality of metal rings, the two tapered slot line antenna units are nested and combined in a 90-degree rotation manner, and each antenna unit is provided with a first metal layer, a dielectric layer and a second metal layer from top to bottom; and the first metal layer is provided with a quarter circular slot, an elliptic arc curve slot and a rectangular-circular-symmetric index curve combined slot. The antenna has the advantages that the geometric structure of the second tapered slot antenna unit is designed on a plane orthogonally symmetric to the plane of the first tapered slot antenna unit in a mirror image manner through the radiation system; the high geometric symmetry is realized, the feeder lines of the two antenna units face each other in the same quarter space separated by the substrate, and the feed terminals are located in diagonal areas, so that the feeder lines do not interfere with each other.

The dual-polarization broadband MIMO antenna provided by the invention is better in return loss and wider in working frequency band. Wherein the arrangement of the decoupling wall significantly reduces the mutual influence between the lenses, so that the wave beam is more stable, the isolation between the dual-polarized broadband antennas is improved, and the antenna gain is enhanced. The multiple decoupling layers arranged side by side generate surface traveling waves and focus electromagnetic waves propagating in the direction perpendicular to the layers into the radiator. In addition, the lens composed of the layered stubs has significantly reduced energy reflected from waves penetrating the outer contour thereof compared to a lens made of a homogeneous dielectric material. Therefore, compared with a dual-polarized antenna using a traditional dielectric lens, the dual-polarized antenna adopting the lens has the advantage that the interference on an adjacent dual-polarized antenna is much smaller. In addition, this decoupling wall has little impact on return loss and is easier to manufacture compared to conventional solutions.

The invention relates to a millimeter wave dielectric lens antenna device which comprises a magnetoelectric dipole antenna array feed source and a dielectric lens antenna, the dielectric lens antenna is placed in front of the magnetoelectric dipole antenna array feed source, and wide-angle scanning of wave beams is achieved by switching different feed sources and changing the irradiation position of electromagnetic waves on the dielectric lens. According to the millimeter wave dielectric lens antenna device, the magnetoelectric dipole antenna array is adopted as a feed source, the dielectric lens is placed in front of the magnetoelectric dipole antenna array, and wide-angle and low-gain-loss beam scanning is achieved by switching the position of the feed source and combining the phase distribution optimization design of the dielectric lens. According to the invention, the scanning range of the antenna is obviously expanded, the gain loss in the scanning process is greatly reduced, the radiation efficiency and stability of the antenna are improved, miniaturization and light weight of the antenna are realized, the gain of the antenna unit is improved, the sensitivity of the antenna unit to external interference factors is reduced, and the anti-interference capability of the antenna is enhanced.

The utility model discloses a terahertz ultra-wideband lens antenna, and relates to the technical field of terahertz. The terahertz ultra-wideband lens antenna comprises a logarithmic helical antenna body and dielectric lenses, the dielectric lenses comprise a hemispherical dielectric lens and a cylindrical dielectric lens, and the radius of the cylindrical dielectric lens is equal to that of the hemispherical dielectric lens. The bottom wall of the cylindrical dielectric lens is attached to the plane wall of the hemispherical dielectric lens, the logarithmic helical antenna body is arranged on the top wall of the cylindrical dielectric lens, and the logarithmic helical antenna body comprises a first helical arm and a second helical arm. The logarithmic helical antenna body has the characteristics of ultra wide band and non-frequency variation, the logarithmic helical antenna body is arranged on the dielectric lens, the dielectric lens can eliminate surface waves generated by optical property discontinuity of the logarithmic helical antenna body and a free space, and meanwhile, beams are focused, so that the radiation direction of the antenna is oriented.

The invention discloses a log-periodic dielectric lens broadband high-gain tapered slot line antenna, and relates to the technical field of wireless communication antennae, the log-periodic dielectric lens broadband high-gain tapered slot line antenna comprises a first antenna unit and a second antenna unit which are distributed in parallel and back to back, and the bottoms of the first antenna unit and the second antenna unit are provided with power dividers. A plurality of semi-cylindrical dielectric lenses are arranged between the first antenna unit and the second antenna unit, and the first antenna unit comprises a first metal layer, a dielectric layer and a second metal layer which are arranged from top to bottom. The antenna impedance bandwidth is obviously broadened, the two back antenna units are matched with the symmetrical power division feed network, stable equal-amplitude in-phase excitation is achieved, the radiation efficiency and directivity are improved, radiation beams are focused by embedding the semi-cylindrical dielectric lens on the premise that the system height is not increased, the gain is greatly improved, and side lobes are restrained.

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 invention discloses a miniaturized antenna device for a microwave moisture meter and a working method of the miniaturized antenna device, and belongs to the technical field of microwave detection. The device comprises a printed board antenna, a dielectric lens, a connecting piece and a shell. The printed board antenna comprises a dielectric substrate, a feed network and a microstrip antenna unit, the bottom surface of the dielectric substrate is coated with copper, and the antenna unit is laid on the top surface of the dielectric substrate; the dielectric lens is made of a low-loss dielectric, is a part of a hemisphere in shape and is mounted above the printed board antenna, the spherical side faces the antenna, and the plane side is fixed at the upper end of the shell; the connecting piece comprises a coaxial cable and a radio frequency connector and is used for signal transmission and external connection. The antenna gain is improved through the focusing effect of the dielectric lens, meanwhile, the miniaturization of the structure is achieved, and the antenna is suitable for occasions with limited installation space. The working method supports single-point test or multi-point array test, realizes multi-channel detection through time-sharing switching of the radio frequency switch, and has the advantages of flexibility, high efficiency, low cost and the like.

An antenna device according to the present invention comprises a dielectric lens, a patch antenna disposed at the focal position of the dielectric lens, a first radio wave absorbing material disposed between the dielectric lens and the patch antenna, and a metal plate disposed between the dielectric lens and the first radio wave absorbing material, wherein the first radio wave absorbing material and the metal plate each have a window for radio waves to pass through that has an opening smaller than the dielectric lens and that is centered at the intersection of a straight line connecting the center of the dielectric lens and the center of the patch antenna.