41results about How to "Raise the scan angle" patented technology

The invention discloses an array typed laser scanner comprising a base, a control driving system and a plurality of auxiliary mirrors arranged in array. The auxiliary mirrors are arranged on the same direction and are fixed on the base; gaps are reserved between two adjacent auxiliary mirrors, so that the auxiliary mirrors do not touch each other when inclining to each other; the control driving system is connected with piezoelectric drivers in Ns of the auxiliary mirrors to realize open loop control of deflecting angles of reflectors. A multiple light ray scanning method is utilized to connect a plurality of small scanning fields into a big scanning field, and is capable of ensuring scanning angles and scanning frequency at the same time, each auxiliary is capable of scanning independently and multiple task detection is realized. With the array typed laser scanner, space utilization rate is greatly increased, and scanning angles are improved; the array typed laser scanner is characterized in that the array typed laser scanner is fast in driving speed, high in control accuracy, no mechanical abrasion, compact in structure, high in space utilization rate and good in stability, small in volume, light in weight, high in rigidity and is especially suitable for application of satellite and unmanned machine imaging laser radar.

The invention discloses an MEMS galvanometer-based micro laser three-dimensional imaging radar and an imaging method. The MEMS galvanometer-based micro laser three-dimensional imaging radar comprisesa two-dimensional MEMS galvanometer, a laser, a laser detector, a driving and control system and an imaging display system; a laser pulse emitted by the laser is reflected by the two-dimensional MEMSgalvanometer, and the reflected laser pulse is refracted to a certain scanning point in a target area; the angle of the MEMS galvanometer is extracted in real time, and the coordinates of the scanningpoint in the target area which is irradiated by the refracted light of the MEMS galvanometer at the angle are obtained; the coordinates of corresponding scanning points in the target area of a plurality of laser pulses are obtained, so that the target area can be divided into a series of dot matrixes; the laser detector receives light which is formed after the laser pulses are diffusely reflectedby the target, so that the laser detector can measure target distance information; the driving and control system is used for driving and controlling the two-dimensional MEMS galvanometer, the laserand the laser detector to work synchronously and sending the feedback information of the two-dimensional MEMS galvanometer, the laser and the laser detector to the imaging display system; and the imaging display system generates the three-dimensional image of the target area according to the dot matrixes and the target distance information. The MEMS galvanometer-based micro laser three-dimensionalimaging radar and the imaging method have the advantages of large scanning field angle, high scanning frequency and simple structure.

The invention proposes a divided sub-array feed VICTS satellite communication antenna, and aims to provide a low-profile high-gain satellite communication antenna with a wide beam scanning angle and a strong radiation capability. The invention is achieved by the following technical scheme: air long slots equally spaced along a radial direction according to a linear array string are made in the surface of an upper metal rotary table, the bottom of a separator of each air long slot is provided with an air gap blind slot for impedance matching, waveguide cavities arranged symmetrically to the diameter axis are made on the lower bottom of the lower metal circular disc, which corresponds to the upper metal rotary table, each waveguide cavity serves as a feed network for an antenna sub-array through a feed line source of the inner wall thereof, a quasi-TEM wave traveling from the left to the right with an approximately equal amplitude and the same phase at a feed end is generated from the left end of each cavity, the quasi-TEM wave electric field flows into each air long slot from each of the waveguide cavities, and the upper metal rotary table uses each air long slot as a radiation sub-array unit, combines the radiation unit sub-arrays into a large array for radiating an antenna into a natural space, and radiates the antenna into the natural space.

The invention discloses a two-dimensional millimeter wave circularly-polarized wide-angle scanning phased-array antenna, and relates to the technical field of millimeter wave antennas. According to the technical scheme, an antenna radiation patch is connected with a rectangular parasitic patch through a high impedance matching microstrip line which is provided with a cross-carved equal length in the center and is used for carrying out impedance matching on the antenna, and a windmill-shaped microstrip radiation patch excitation equal-amplitude in-phase polarization orthogonal degenerate mode is manufactured on the symmetric center of a diagonal bisector of the corner of the antenna radiation patch; feed probes penetrate through the antenna dielectric layer and are connected with the antenna radiation patch through the four rectangular parasitic patches, the four feed probes 4 of each antenna unit feed through rotary feed structures which are equal in amplitude and sequentially differ by 90 degrees, and the windmill-shaped microstrip radiation patch is connected with rectangular blocks of the four rectangular parasitic patches of the four metallized probes for feed. feeding in equal-amplitude excitation with the phase difference of 90 degrees is performed in sequence to form circular polarization radiation, and the antenna arrays are arranged in a rectangular manner at equal intervals according to unit intervals to form an antenna array surface.

The invention provides a one-dimensional wide-angle scanning phased array based on a rectangular patch TM20 mode, and relates to the technical field of microwave antennas. The structure of the phasedarray provided by the invention is mainly composed of an array antenna patch, a feeding part and a dielectric substrate, and the array is composed of 8 identical units arranged at equal intervals. Since the performance of the phased array has a great relationship with the array units, the invention makes an improvement based on the rectangular patch TM20 mode, expands the unit beam, and further broadens the phased array scanning range. Under the premise of ensuring the same polarization in the scanning process, through miniaturization technology, the unit size is reduced, the unit spacing is increased to a certain extent, the mutual coupling effect among the units is reduced, and a good impedance matching effect in the beam scanning process is ensured.

The invention provides a lidar and a lidar control method. The lidar comprises M*N laser emitters used for emitting outgoing laser, and a galvanometer used for changing the optical path direction of the outgoing laser. M*N laser emitters constitute a laser emitter array with M rows and N columns, wherein M and N are integers greater than or equal to 2. According to the embodiment of the invention,the laser emitters are added on a transmitting end, which increases the scanning range of the lidar; the scanning angle of the lidar is increased; and the resolution of the lidar can be increased.

The invention relates to an array lens, a lens antenna and electronic equipment. The array lens includes multiple dielectric layers; and multiple layers of array structures. The array structures and the dielectric layers are alternately stacked along a first direction. Each layer of the array structure comprises multiple spaced array cells arranged in an array. Each array cell comprises a first conductive sheet and a second conductive sheet surrounding the first conductive sheet, and multiple array cells located at the same relative position in multiple layers of the array structures are coaxially arranged in the first direction, wherein multiple first conductive sheets in the same array structure have gradually varying conductive sheet sizes in the array direction. When the electromagnetic wave is incident on the array lens along the first direction, the array lens can compensate the phase distribution of different frequency bands, converge the electromagnetic wave, keep the focal plane of the array lens unchanged in a wider frequency range, greatly reduce the reduction of the polarization beam gain and greatly improve the scanning angle of the lens antenna.

The invention discloses a high-gain wide-angle scanning multi-beam well lid antenna based on a Luneberg lens. The basic structure comprises a spherical Luneberg Lens antenna processed by a 3D printing technology, four spherical arrays formed by 4 * 4 vertical dipole antenna feed sources, an ABS support frame for fixing the feed sources, a glass fiber reinforced plastic well cover (three layers), an ABS upper cover, an ABS lower cover, a steel frame, a steel bottom plate, a glass fiber reinforced plastic lower side plate, a well seat and a ball support block, The miniaturized vertical dipole feed source reduces the shielding effect of the feed source on the aperture of the antenna as much as possible, the vertical dipole is fixed on the ABS support frame, the ABS upper cover and the ABS lower cover play a role in protecting the Luneberg lens antenna, and the three layers of glass fiber reinforced plastic well covers are designed according to the propagation theory of electromagnetic waves in layered media, so that the maximum transmission coefficient of the three layers of glass fiber reinforced plastic well covers is ensured. The manhole cover antenna designed by utilizing the scheme realizes high-strength design, has the advantages of concealment, wide-angle scanning, high gain and simultaneous multi-beam directional communication, and is very suitable for being applied to 5G communication.

The invention discloses a large-range scanning coaxial MEMS laser radar optical system, comprising a collimating laser, a one-dimensional MEMS galvanometric scanner, a reflecting mirror, a rotating mirror, a driving motor and a receiving end; the collimating laser and the one-dimensional MEMS galvanometric scanner are arranged on the same straight line; the reflecting mirror, the rotating mirror and the one-dimensional MEMS galvanometric scanner are arranged on the same straight line in another direction; the straight line where the collimating laser and the one-dimensional MEMS galvanometricscanner are located is angularly intersected with the straight line where the reflecting mirror, the rotating mirror and the one-dimensional MEMS galvanometric scanner are located; the receiving end and the reflecting mirror are arranged on the same straight line, and the straight line where the receiving end and the reflecting mirror are located is angularly intersected with the straight line where the reflecting mirror, the rotating mirror and the one-dimensional MEMS galvanometric scanner are located; and the driving motor is mounted below the rotating mirror. The system disclosed by the invention does not use a semi-transparent semi-reflection mirror, and energy loss is low; in a receiving light path, wasted energy is also relatively little; and a manner that the one-dimensional MEMS galvanometric scanner and the rotating mirror are combined is adopted, so that a scanning angle of a laser radar in the horizontal direction is greatly increased while centralized energy of a light beam is guaranteed.

The disclosure provides an optical phased array based on incomplete asymmetrical AWGs (Arrayed Waveguide Gratings). The optical phased array comprises a tunable laser, an optical beam splitter, an optical switch array and an AWG array, wherein the tunable laser is used for outputting a light beam with a tunable wavelength; the optical beam splitter is coupled with the tunable laser, and used for splitting an input light beam into N equal-power light beams; the optical switch array is arranged behind the optical beam splitter, and comprises N independent optical switches; each optical switch corresponds to one equal-power light beam, and is used for controlling the on / off of the equal-power light beam; the AWG array is arranged behind the optical switch array, and comprises N independent incomplete asymmetrical AWGs; and each incomplete asymmetrical AWG corresponds to one equal-power light beam, and is used for introducing light beams of different wavelengths which are input under the control of corresponding optical switches and are emitted by the tunable laser into different phase differences. Thus, interference hot spots appear in different directions of an output end; variable focus imaging is realized; and multi-angle and high-accuracy light beam scanning is finished.

The invention relates to the technical field of optical devices, and especially relates to an acousto-optic deflector device for improving a laser scanning angle. The acousto-optic deflector device comprises an N-level acousto-optic deflector assembly; the N-level acousto-optic deflector assembly comprises a shell, and a mounting plate is arranged on the shell; and the mounting plate is equipped with N acousto-optic deflectors, N-1 acousto-optic modulators and one optical fiber collimator which are sequentially connected with each other. According to the acousto-optic deflector device for improving the laser scanning angle provided by the invention, the acousto-optic deflector is cascaded, so that the scanning angle of the laser is improved manyfold, and the requirements of large-angle, high-precision and fast scanning can be met.

A large-scanning-angle array antenna and a design method thereof are provided. Scanning of an azimuth and a pitching + / - 45-degree scanning angle can be realized under a TR assembly interval close toone wavelength, and the maximum grating lobe of a visual space is -20dB lower than a main lobe. The antenna comprises a frame and an antenna subarray. N*M areas are arranged in the frame, and each area is provided with an antenna subarray; each antenna subarray comprises a TR assembly sub-array, a sub-array feed adapter plate and a sub-array antenna plate. The input end of the sub-array feed adapter plate is connected with the TR assembly sub-array, the output end of the sub-array feed adapter plate is connected with the input end of the sub-array antenna plate, and the sub-array antenna platetakes the antenna unit group as the output. Through the subarray feed adapter plate, the distance between subarray antenna units is reduced, the reduced subarray antenna offsets in the subarray sizeof the original TR assembly, and through the structure, grating lobes are inhibited, and the engineering level is improved.

The invention relates to an array lens, a lens antenna and electronic equipment. The array lens comprises at least one dielectric layer, at least two layers of array structures, wherein the dielectriclayers and the array structures are alternately stacked along a first direction; wherein each layer of array structure comprises at least two hollowed-out grooves formed in an array mode, an openingring piece is arranged in each hollowed-out groove, and the at least two opening ring pieces, located at the same opposite position, of the at least two layers of array structures are coaxially arranged in the first direction; wherein in the same array structure, a plurality of pixels are arranged; the at least two split ring sheets have gradually changed opening sizes in the array direction, so that the phase distribution of different frequency bands can be compensated. Electromagnetic waves can be gathered, the focal plane of the array lens can be kept unchanged within a wider frequency range, the decreasing amplitude of offset beam gain is greatly reduced, the scanning angle of a lens antenna is greatly increased, and the coverage range is large.

The invention discloses a broadband low cross polarization microstrip patch phased-array antenna unit, and belongs to the technical field of microwave antennas. The antenna unit is composed of five layers of dielectric substrates, and the reflection floor is laid on the lower surface of the first dielectric substrate. The slot floor is laid on the lower surface of the second dielectric substrate, the feed microstrip line conduction band is laid on the upper surface of the second dielectric substrate, the square driving patch is laid on the upper surface of the third dielectric substrate, the square parasitic patch is laid on the upper surface of the fifth dielectric substrate, and the central area of the fourth dielectric substrate is hollowed out. The first support is used for supporting the fifth dielectric substrate; metal blind holes are formed in the periphery of the first dielectric substrate and used for connecting the reflection floor and the slot floor to form a closed metal cavity, metal through holes are designed in the periphery of the antenna unit to penetrate through all the dielectric substrates, and equivalent metal walls are formed around patches to block propagation of surface waves. According to the invention, the broadband, low-cross-polarization and wide-scanning-angle microstrip patch phased-array antenna unit with a multilayer structure can be obtained.

The invention relates to an array lens, a lens antenna and electronic equipment. The array lens comprises at least one dielectric layer, at least two layers of array structures, wherein the dielectriclayers and the array structures are alternately stacked along a first direction; wherein each layer of array structure comprises a metal body, a plurality of hollowed-out grooves formed in an array mode are formed in the metal body, an array unit isolated from the metal body is arranged in each hollowed-out groove, and the multiple array units, located at the same relative position, of at least two layers of array structures are coaxially arranged in the first direction; wherein in the same array structure, the array units in the plurality of hollowed-out grooves have relative rotation angleswhich are gradually changed relative to the array direction in at least one array direction; phase distribution of different frequency bands can be compensated, electromagnetic waves can be gathered,the focal plane of the array lens can be kept unchanged within a wider frequency range, the decreasing amplitude of offset beam gain is greatly reduced, the scanning angle of a lens antenna is greatly increased, and the coverage range is large.

The invention discloses intelligent wearable equipment. The intelligent wearable equipment comprises an antenna array used for scanning sign information of an intelligent wearable equipment user, wherein the antenna array comprises multiple array elements; and the phase of at least one array element radiation signal in the multiple array elements is changed along with time. The phase of at least one array element radiation signal in the disclosed multiple array elements is changed along with time; the multiple array element radiation signals can be overlaid in the space, so that the radiation signal with changeable phase causes a condition that the phases of the multiple array element radiation signals are changed along with time; therefore, the scanning angle of the multiple array element radiation signals can be enlarged compared with a condition that the phases of the multiple array element radiation signals are not changed; consequently, more sample data can be collected to calculate the sign information; and the sign information can be calculated more accurately according to more sample data.

The invention discloses a visible light sparse array waveguide optical phased array. The visible light sparse array waveguide optical phased array comprises an optical coupler used for carrying out coupling processing on an obtained optical signal, a light beam splitter used for carrying out light splitting processing on the coupled light signals to obtain sub-signals, a phase shift array connected with the light beam splitter and used for regulating and controlling the phases of the sub-signals to obtain target sub-signals, a waveguide array used for transmitting the coupled optical signal, the sub-signal and the target sub-signal, and a sparse antenna array connected with the phase shift array and used for scattering the target sub-signals to a free space. The array elements of the optical phased array are optimized through the sparse array, the grating lobe problem of the optical phased array in the visible light wave band is solved, and large-view-field scanning is achieved.

The invention relates to an array lens, a lens antenna and electronic equipment. The array lens comprises a dielectric layer and two layers of array structures respectively arranged on two opposite sides of the dielectric layer. The array structures are provided with a plurality of gap units which are arranged in a two-dimensional array. Each gap unit comprises a closed ring gap, an open ring gapand a strip-shaped gap which are separated from one another, the closed ring gap is arranged around the open ring gap, and the open ring gap is arranged around the strip-shaped gap. Every two gap units, located at the same opposite position, in the two layers of array structures are coaxially arranged, and the opening directions of the open ring gaps in the two gap units are opposite. The strip-shaped gaps in the gap units of the same array structure have gradually changed gap sizes in the array direction. Phase distribution of different frequency bands can be compensated, so that electromagnetic waves radiated by a feed source far away from a focus can be well gathered, the decrease amplitude of off-focus beam gain is greatly reduced, and the scanning angle of the lens antenna is greatlyincreased.

The invention discloses a reconfigurable artificial surface antenna with three freedom degrees. The antenna mainly consists of resonant units of the same structure, and each resonant unit comprises asquare dielectric slab, a copper piece structure and a variable capacitance diode, wherein the copper piece structure and the variable capacitance diode are disposed on the dielectric slab. The copperpiece structure comprises two H-shaped piece structures and an interdigital structure located between the two H-shaped piece structures. The resonant units are periodically extended in a second direction, and the H-shaped piece structures on the adjacent resonant units are correspondingly connected to form a resonant unit group. A plurality of resonant unit groups are periodically extended in a first direction, thereby forming a reconfigurable artificial surface. The type of the variable capacitance diode is SMV1234, and the variable capacitance diode works in a reverse bias state. The antenna achieves the simultaneous reconfiguration of wave beam width, instant working band and scanning angle through applying different voltages to two ends of the resonant units, and is large in variableamplitude of reconfiguration.

The invention relates to an electrically-controlled zero-crossing scanning planar leaky-wave antenna based on a metamaterial, which belongs to the technical field of microwave antenna engineering, andcomprises bottom copper foil, a dielectric plate and a periodic leaky-wave structure. The bottom-layer copper foil is of a horizontally-placed rectangular sheet structure; the dielectric plate is horizontally and fixedly mounted on the upper surface of the bottom-layer copper foil; the periodic leaky-wave structure is horizontally mounted on the upper surface of the dielectric plate; the periodicleaky-wave structure is a hollow structure; 2n+1 metallized through holes are formed in the dielectric plate; the periodic leaky-wave structure comprises two isolation patches, n leaky-wave units, 3n+2 vertical feed lines and two horizontal feed lines. The leaky-wave antenna solves the two problems that a traditional leaky-wave antenna can only conduct frequency scanning, cannot conduct fixed-frequency scanning and can only conduct forward radiation in the wave propagation direction, and has the advantages of being high in radiation efficiency, simple in structure, convenient to machine, lowin price and the like.

The invention discloses a deformed hemispherical dielectric lens antenna based on array feeding for multi-beam directional communication and beam scanning. Its basic structure includes 1×8 square microstrip patch feed array, layered deformed hemispherical dielectric lens and antenna support firmware. The anamorphic lens antenna uses the method of ray optics to design the inner and outer layers of the anamorphic lens. With the form of array feeding, it effectively solves the shortcomings of the traditional hemispherical lens with small scanning angle and low EIRP, and is helpful for anamorphic hemispheres. Lens antennas are better used in long-distance multi-beam directional communication and beam scanning, low-profile usage scenarios and corresponding market demands. Using today's mature 3D printing technology, deformable lenses and antenna support firmware can be easily processed, which solves the ubiquitous engineering realization problems of lens antennas. Based on the basic structure of the present invention, other specific implementations of the present invention can be formed by reasonably changing the size and deformation of the filling medium and the form of the feed source.

The invention provides an in-plane sliding micromirror and a laser radar, the in-plane sliding micromirror comprises a substrate, a mirror surface part arranged on the substrate, a sliding part arranged between the substrate and the mirror surface part, and a driving part used for driving the sliding part to move, the mirror surface part comprises a reflecting surface, the reflecting surface has at least two reflecting angles and the sliding part drives the mirror surface part to slide on the substrate and switch the reflection angle. The mirror surface part can be driven by the sliding part to slide, the mirror surface part can be switched to different reflection angles during sliding, a traditional mode that a torsion arm drives the scanning mirror to rotate is changed into an in-plane sliding mode, the scanning angle of the micro-mirror to a light beam can be greatly increased, long-time stable scanning is achieved, and the in-plane sliding micromirror has long service life.

The invention relates to an array lens, a lens antenna and electronic equipment. The array lens comprises at least one dielectric layer, at least two layers of array structures, wherein the dielectriclayers and the array structures are alternately stacked along a first direction; each layer of array structure is provided with at least two gap units arranged in an array mode, each gap unit comprises a closed ring gap and an open ring gap, the closed ring gaps are arranged around the open ring gaps, and the at least two open ring gaps, located at the same opposite position, of the at least twolayers of array structures are coaxially arranged in the first direction. In the same array structure, the at least two split ring gaps have gradually changed opening sizes in the array direction; phase distribution of different frequency bands can be compensated, electromagnetic waves can be gathered, the focal plane of the array lens can be kept unchanged within a wider frequency range, the decreasing amplitude of offset beam gain is greatly reduced, the scanning angle of a lens antenna is greatly increased, and the coverage range is large.