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 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 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 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.

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 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 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.