431 results about "Phase shifted" patented technology

The present disclosure relates to the technical field of electromagnetic wave sensors, in particular to a signal transmitting, calibration, compensation and transceiving links, an integrated circuit, an electromagnetic wave sensor and a device, wherein the transmitting link includes an analog signal source and a digital phase shifter, the analog signal source may be configured to provide an initial analog signal, and the digital phase shifter may be configured to provide a phase shift signal in a digital domain and to perform phase shifting on the initial analog signal based on the phase shift signal, so as to perform a preset phase shifting operation on the initial analog signal, thereby effectively improving the phase modulation resolution and phase modulation accuracy.

The invention provides a distributed feedback laser with a double-layer grating structure, and relates to the technical field of lasers, the laser forms an InGaAlAs multi-quantum well active region, an upper sampling grating layer and a lower phase shift grating layer on an n-type InP substrate in sequence, the upper grating layer is designed based on a reconstruction equivalent chirp technology, and the lower phase shift grating layer is designed based on a reconstruction equivalent chirp technology. Two sections of asymmetric modulation areas with sampling periods linearly gradually changing in opposite directions are arranged in the axial direction of the resonant cavity, and the lower grating layer is a quarter-wave phase shift grating matched with the period of the upper seed grating. Through the synergistic effect of equivalent phase modulation and phase shift generated by the double-layer grating, the photon density distribution in the cavity can be improved, the longitudinal space hole burning effect can be weakened, the sensitivity to end face phase fluctuation can be reduced, high single-mode power and large modulation bandwidth can be realized in a wide temperature range, and the double-layer grating is suitable for a high-speed optical communication and coarse wavelength division multiplexing transmission system.

The invention discloses a DP-MZM-based reconfigurable mixer with phase shift and image rejection functions, and belongs to the field of microwave photon signal processing. By adjusting an input radio frequency signal and a direct current bias voltage of the DP-MZM1, four different LO frequency doubling and mixing functions can be realized. By controlling the angle alpha between the polarization direction of the polarization analyzer and one axis of the modulator, the phase of the generated signal can be flexibly tuned in the range of 0-360 degrees. When combined with the optical frequency comb, the multi-channel multi-band frequency conversion system can be expanded into a multi-channel multi-band frequency conversion system with independent phase tuning capability by utilizing the channel switching and frequency slot selection functions of the wavelength selection switch, and parallel output of various frequency mixing results can be realized. By adjusting the phase difference between the two-channel output signals, I / Q mixing, double-balanced mixing and image rejection mixing can be configured. The scheme is not influenced by direct current bias drift, the system complexity is reduced, and the frequency conversion efficiency is improved.

The invention belongs to the technical field of electric power measurement, and discloses a calibration method and system of an intelligent measurement switch and a multi-switch synchronous measurement method, and the method comprises the steps: obtaining voltage and current waveform data of the intelligent measurement switch under a nonlinear load condition, and extracting a frequency spectrum feature matrix of the voltage and current waveform data; constructing an amplitude-phase coupling error model representing a nonlinear incidence relation between amplitude fluctuation and phase deviation, inputting the spectrum characteristic matrix into the amplitude-phase coupling error model, and calculating an amplitude-phase coupling error vector; performing vector decomposition on the amplitude-phase coupling error vector, and separating out an in-phase component error and an orthogonal component error; and generating a calibration compensation coefficient according to the in-phase component error and the orthogonal component error, and performing vector calibration on the intelligent measurement switch, thereby improving the calibration precision of the intelligent measurement switch.

According to an aspect of the present inventive concept there is provided a laser system for generating a frequency modulated continuous wave, FMCW, light signal, the system comprising: a tunable laser for generating the FMCW light signal; an optical measurement unit configured to receive a portion of the FMCW light signal, and to output, via an optical hybrid coupler, at least two angle diversity signals based on a difference between a first and second signal formed by splitting the portion of the FMCW light signal wherein the second signal is delayed relative to the first signal, wherein a pair of signals of the at least two angle diversity signals have a fixed phase shift relative to each other; and a control unit configured to: receive the at least two angle diversity signals, estimate, based on the at least two angle diversity signals, a compensation needed for adjusting a non-linearity of a frequency chirp of the tunable laser, and output a corresponding control signal to the tunable laser, wherein the control signal is configured to improve a linearity of the frequency chirp.

The invention provides a pipettor automatic calibration positioning and accuracy evaluation method based on photoelectric sensing, and relates to the technical field of pipettor calibration, and the method comprises the following steps: arranging an annular photoelectric sensor array to collect interference fringe phase difference, liquid level reflection light signals and surface acoustic wave signals, and adopting a five-step phase shift method to obtain a three-dimensional displacement vector; dynamic calibration is achieved through liquid level morphological parameter analysis in combination with adaptive Kalman filtering, numerical simulation is conducted on the liquid drop forming process through time-frequency analysis and a fluid mechanics model, and finally the accuracy is evaluated through adaptive fuzzy reasoning and Bayesian estimation. According to the invention, high-accuracy automatic calibration and evaluation of the pipettor are realized.

The application discloses a laser cavity diagnosis device and method based on double-frame delay synchronization phase shift, which comprises an excitation module and a detection module; the excitation module comprises a first laser, a first 1 / 2 wave plate, a polarization beam splitter prism, a beam splitter, an energy meter, a convex lens and a water tank; the detection module comprises a second laser, a beam expander lens group, a second 1 / 2 wave plate, a second polarization beam splitter prism, a third 1 / 2 wave plate, a first reflector, a second reflector, a fourth 1 / 2 wave plate, a third polarization beam splitter prism, a third reflector, a fourth polarization beam splitter prism, a first 1 / 4 wave plate, a first imaging lens, a first micro-polarization camera, a second 1 / 4 wave plate, a second imaging lens and a second micro-polarization camera. The application introduces a double-frame delay method in the traditional synchronous phase shift interference, overcomes the defects of the existing cavity detection technology, and realizes the observation of the instantaneous phase change in a single cavity pulsation period.

The invention discloses a control method for improving the heavy load efficiency of an asynchronous parallel soft switching inverter, and the method comprises the following steps: S1, constructing a topological structure of the asynchronous parallel inverter, generating a DPWM modulation wave through zero-sequence component injection in a QCM mode, and enabling a power tube not to act in a specific interval in a fundamental wave period; s2, adjusting a clamping interval of a DPWM1 strategy by correcting the injected zero-sequence component; s3, calculating a phase shift angle, and generating carrier waves of a leading bridge arm and a lagging bridge arm; s4, when the power tube enters or exits from the non-action interval, transition interval control is carried out, so that the differential mode inductance circulating current is reduced to 0; and S5, generating a driving signal of a hybrid control strategy based on DPWM modulation, and controlling a switching tube to act according to the optimized clamping interval and transition logic. According to the method, the current stress and on-state loss of the power tube of the asynchronous parallel inverter under the heavy load are reduced, and the current stress minimization of the power tube and the efficiency maximization of the inverter are realized.

The present application discloses a phase shift circuit and a radio frequency microwave system. The phase shift circuit may comprise: a first node circuit, a second node circuit, and a first signal channel and a second signal channel coupled between the first node circuit and the second node circuit, wherein the first node circuit is configured to split an input signal so as to simultaneously output a first differential signal to the first signal channel and a second differential signal to the second signal channel; the first signal channel and the second signal channel are implemented on the basis of a differential circuit architecture, and are configured to respectively perform signal attenuation and / or quadrant transformation on the first differential signal and the second differential signal, so as to implement phase shift; the second node circuit is configured to synthesize a first phase-shifted signal output by the first signal channel and a second phase-shifted signal output by the second signal channel so as to obtain an output signal; and the phase difference between the output signal and the input signal is within the range of 0-360 degrees.

The invention discloses a thin-film barium titanate electro-optical switch unit based on a composite electrode and an array thereof. The optical switch unit comprises a first waveguide optical fiber coupling module, a second waveguide optical fiber coupling module, an optical beam splitting module, an electro-optical phase shift region, an optical beam combining module, a third waveguide optical fiber coupling module and a fourth waveguide optical fiber coupling module. Wherein the composite electrode of the electro-optic phase shift region is composed of a metal electrode and a transparent conductive layer, the electrode is closer to the waveguide by utilizing the transparent characteristic of a transparent conductive material, the coupling of a light field and an electric field is effectively enhanced, and the extinction ratio is improved. Meanwhile, a barium titanate film with a high electro-optical coefficient is adopted as a waveguide material, and the performance is further optimized, so that the electro-optical switch unit has the excellent characteristics of low-voltage driving, high extinction ratio, low insertion loss and small size.

The invention relates to the technical field of equipment calibration, and discloses a collaborative directional calibration method and system, electronic equipment and a storage medium, and the method comprises the steps: obtaining the circumferential strain distribution data of a drill rod, and extracting the amplitude-frequency characteristics of a dominant vibration mode and the phase offset of an associated coupling vibration mode; generating an amplitude compensation coefficient according to the amplitude-frequency characteristics, generating a time-varying phase compensation factor in combination with the phase offset, and generating a dynamic vibration compensation parameter based on vibration energy distribution dynamic weighted fusion; based on a pre-trained nonlinear phase distortion compensation model, inputting a dynamic vibration compensation parameter and then outputting a gyroscope angular velocity signal after phase correction; performing vibration interference frequency band suppression processing on the accelerometer signal, and outputting the processed accelerometer signal; and performing iterative optimization on the corrected angular velocity signal and the processed accelerometer signal, and outputting a directional calibration result in combination with filtering smoothing processing. According to the invention, high-precision cooperative calibration of the inertial sensor in a multi-mode mechanical vibration environment can be realized.

A layered pulse generator for a vertical-cavity surface-emitting laser (“VCSEL”) driver is disclosed consisting of three elements: a low-speed pulse generator, a high-speed pulse generator, and a pulse generator selector, all of which are on-chip with the VCSEL driver. By providing these elements on-chip, overall system power and complexity are reduced while allowing for significantly higher pulse train frequencies compared with known systems. The high-speed pulse generator is capable of generating pulses faster and with higher resolution than that of the low-speed pulse generator. The high-speed pulse generator uses multiple clock outputs, phase shifted, and synthesized into a single pulse waveform capable of wide-ranging frequencies, duty cycles and pulse counts.

The application belongs to the technical field of radar signal processing and imaging, and provides a differential coupling single-frequency time-varying low-quantization imaging method, which comprises receiving a SAR echo signal, constructing a single-frequency time-varying threshold signal, single-bit quantization processing of a reference channel, single-bit quantization processing of a phase shift channel, double-channel data fusion and harmonic cancellation, and imaging processing based on a synthesized signal. The application effectively reduces the quantization noise base and improves the detection capability of a SAR system on weak targets under the premise of not significantly increasing the hardware cost.

The invention relates to the technical field of thermo-optical phase shifters, in particular to a thermo-optical effect-based thermo-optical phase shifter, which comprises a base and a thermo-optical phase shifter, and is characterized in that the base comprises a substrate, a lower cladding and an upper cladding which are sequentially arranged from bottom to top; the thermo-optical phase shifter comprises an input waveguide, a central waveguide and an output waveguide which are arranged on the upper surface of the lower cladding at intervals and are connected in sequence; the first slab waveguide is arranged on the upper surface of the lower cladding and located between the input waveguide and the central waveguide, the middle area of the first slab waveguide is subjected to N-type doping or P-type doping to form a first heavily-doped area, and a first electrode and a first plated-through hole are arranged on the upper cladding and located above the first heavily-doped area; the second slab waveguide is arranged on the upper surface of the lower cladding and located between the central waveguide and the output waveguide, the middle area of the second slab waveguide is subjected to N-type doping or P-type doping to form a second heavily doped area, and a second electrode and a second plated-through hole are arranged on the upper cladding and located above the second heavily doped area. The phase shift efficiency can be effectively improved.

In an embodiment of the invention, a passive beamforming wireless signal repeater includes a Rotman lens having a plurality of input ports and a corresponding plurality of output ports, each output port corresponding to an input port, each input port configured to receive a signal from an uplink antenna and apply a phase change to the signal before emitting the signal from the corresponding output port, and a frequency scanning antenna (FSA) structure comprising a first plurality slots of varying lengths configured to apply a different phase shift at each radiating slot and cause the radiated signals to combine constructively in a certain direction, the FSA configured to receive a signal from the Rotman lens and direct an output signal in a direction determined by the frequency of the signal.

The invention relates to the technical field of communication, and discloses an antenna and communication equipment. The antenna comprises a feed network, a plurality of phase shift units and a plurality of reconfigurable antenna sub-arrays, wherein the feed network comprises an input end and a plurality of output ends; each phase shifting unit is connected between one output end of the feed network and one reconfigurable antenna sub-array, and the phase shifting units are used for adjusting the phase of a radio frequency signal output by the feed network and then outputting the radio frequency signal to the reconfigurable antenna sub-arrays; the phase shifting unit comprises a first transmission line, a second transmission line and a liquid crystal layer, the liquid crystal layer is arranged between the first transmission line and the second transmission line, the physical length of the first transmission line and the physical length of the second transmission line are L, the guided wave length of the first transmission line and the guided wave length of the second transmission line are lambda g, and L and lambda g meet the condition that L is smaller than or equal to 1 / 4 lambda g; the reconfigurable antenna subarray comprises a plurality of 1-bit antenna units. According to the antenna, the signal transmission loss and the manufacturing cost can be reduced on the premise of improving the performance.

An N-antenna array zero-balance phase measurement apparatus, where N is an integer greater than two, includes: N couplers, each of the couplers including an input for receiving a radio frequency (RF) signal from a corresponding receiving element, a non-phase shifted output, and a phase-shifted output; and N phase detectors, each of the phase detectors including first and second inputs, and an output for generating a phase difference signal indicative of a difference in phase between respective signals provided to the first and second inputs. Adjacent couplers of the N couplers are connected to corresponding adjacent phase detectors of the Nphase detectors in a cross-coupled configuration. The N-antenna array zero-balance phase measurement apparatus is configured to generate a zero-balance phase output signal as a function of first to N-th phase difference signals generated by the N phase detectors, respectively.

For example, polarization control circuitry may be configured to control polarization of a transmitted signal according to a polarization setting. The polarization control circuitry may include a first radio frequency (RF) path configured to transmit a first RF signal corresponding to the transmitted signal via a first antenna port according to a first polarization; a second RF path configured to transmit a second RF signal corresponding to the transmitted signal via a second antenna port according to a second polarization; phase offset circuitry, the phase offset circuitry comprising at least one phase shifter in at least one of the first RF path or the second RF path, the phase offset circuitry is configurable to apply a phase offset between the first RF signal in the first RF path and the second RF signal in the second RF path; and a controller to configure the phase offset circuitry to apply the phase offset based on the polarization setting.

The invention relates to the field of signal frequency detection in microwave photonics, and discloses a broadband instantaneous frequency measurement receiving system based on Brillouin spectrum compression, which utilizes a dual-tone pump optical carrier signal carried on an intensity modulator and an optical filter to generate a single Brillouin pump source regulated and controlled by unknown radio frequency. A stimulated Brillouin structure narrowed by an optical fiber ring cavity and a single-pumping reference source subjected to phase shift beat frequency, a signal in a 45GHz range can be compressed to a bandwidth of 2.5 MHz, and meanwhile, an original signal can be subjected to optical domain down-conversion processing by a reference source signal, so that a low-frequency signal easy to process electronically is obtained; besides, a double-fiber annular cavity design is adopted, the line width of the Brillouin resonant laser is further compressed through mode matching of interference of light waves in the cavity, test precision reduction caused by frequency spectrum compression is made up, the resolution ratio can reach + / -2.2 MHz, and finally the Brillouin broadband instantaneous frequency measurement receiving technology is achieved.

The application provides a spatial sound field real-time generation device based on a light-controlled programmable ultrasonic phased array, realizes continuous phase modulation and amplitude control of array elements, does not need to separately configure a high-voltage pulse circuit or an independent amplifier for each channel, thereby guaranteeing the compactness of the system structure and the low power consumption advantage; the light-controlled phase shift unit independently controls the phase of each ultrasonic element by adjusting the light intensity, realizes accurate regulation and control of the wave front direction; the overall layout of the array and the power input are kept synchronous, thereby guaranteeing the controllability of the amplitude and energy output of the ultrasonic field; the application decouples the phase control and the power driving, effectively avoids the complex wiring problem of multi-channel synchronous control, and improves the flexibility and scalability of array operation; in addition, the introduction of the light-controlled mode significantly simplifies the array driving circuit, realizes parallel control of a large-scale array, and thereby forms an ultrasonic field generation device with high compactness, excellent controllability and high flexibility.

The invention provides an uplink MIMO-NOMA (Multiple Input Multiple Output-Non-Orthogonal Multiple Access) system optimization method with a maximized sum rate, which comprises the following steps: firstly, in order to suppress interference between a transmission cluster and a reflection cluster, providing an inter-cluster SIC method: clustering users according to transmission characteristics, adopting space division multiple access in each cluster, and performing inter-cluster SIC of NOMA transmission so as to reduce the interference between the clusters; secondly, a non-convex optimization problem aiming at maximizing the total rate of the system is formulated and solved by using an alternating optimization framework, in the framework, a receiving equalizer is optimized according to a minimum mean square error standard, and transmitting power control of a user is processed through successive convex approximation, so that sub-problems are easy to process; and finally, the beam forming of the active STAR-RIS adopts a sequential rotation design. According to the invention, the dual-fading effect is effectively overcome by adjusting the phase shift and amplitude of electromagnetic waves, an alternating optimization framework is also provided to solve the described non-convex problem, user power is controlled through continuous convex approximation, and active STAR-RIS beam forming is realized through sequential rotation.

The invention discloses a motor three-phase current construction method, refrigeration equipment and a household appliance. A sampling period comprises two pulse width modulation periods, and a first sampling window and a second sampling window of the first pulse width modulation period are obtained; when the width of the sampling window is smaller than the preset shortest window width, performing phase shift processing on the first pulse width modulation period to enable the widths of all the sampling windows to be larger than or equal to the shortest window width to meet the sampling requirement, and performing phase shift processing opposite to the first pulse width modulation period on the second pulse width modulation period to enable the width of all the sampling windows to be larger than or equal to the preset shortest window width to meet the sampling requirement; the waveforms in the two pulse width modulation periods are kept symmetrical as far as possible; the first current and the second current of the motor are acquired to construct the three-phase current of the motor under the condition that the sampling window meets the sampling requirement and the waveform in the sampling period is kept symmetrical as far as possible, so that the accuracy of current acquisition is ensured, the accurate construction of the three-phase current is ensured, and the reliability of the motor is improved. And meanwhile, the influence of phase shifting on motor control performance is reduced.

An antenna element receives a first radio wave and outputs a transmission signal, and receives a second radio wave and outputs a reception signal. A phase conversion unit applies a predetermined phase shift amount to a signal to be input and then output the signal. A switch connects the antenna element to one of the phase conversion unit and external receiver. When the first radio wave enters the antenna, the switch connects the antenna element to the phase conversion unit, and the transmission signal to which the predetermined phase shift amount has been applied is radiated from the antenna element. A third radio wave radiated from each of a plurality of RIS elements is deflected in a predetermined direction. When the second radio wave enters the antenna, the switch connects the antenna element to the external receiver, and the external receiver receives the reception signal.

A system, comprising a device including a circuit configured to produce a phase shift in a reflected signal, wherein a plurality of phase bits, which may be either switchable or static, are situated in parallel relative to one another within the device, wherein each switchable phase bit operates on a fraction of incident signal power, and wherein reflections from all parallel bits are recombined into a single signal reflected from the phase shifting device.

The invention relates to a cable fault identification method based on a frequency domain reflection method, and belongs to the technical field of detecting faults in a cable by adopting a pulse reflection method in electrical variable measurement. The method comprises the following steps: setting interval time for increasing sine wave signal frequency to divide moments; calculating an initial frequency f0, and transmitting a sine wave signal with the frequency f0 and the phase of 0 degree into the cable; and then calculating the phase offset at each moment, taking four times of the sine wave signal frequency as the lower limit frequency of the frequency domain reflection method at the moment when the phase offset is equal to 180 degrees for the first time, and further carrying out cable fault identification. According to the method, the lower limit frequency of the frequency domain reflection method is accurately set according to the actual characteristics of the to-be-detected cable, so that omission of cable fault key characteristics is avoided, and the identification accuracy is greatly improved.

The present application discloses a control method for a power factor of a flyback inverter during grid connection, and a controller. The method comprises: acquiring a working electrical signal of a target power grid; performing phase locking on the working electrical signal to obtain a voltage modulation wave signal; on the basis of a power factor angle corresponding to a preset power factor, performing phase shift on the voltage modulation wave signal to obtain a current modulation wave signal; selecting part of the waveform of the voltage modulation wave signal as a correction waveform of the current modulation wave signal in a corresponding time period; fusing the correction waveform with part of the waveform of the current modulation wave signal to obtain a corrected modulation wave signal waveform; and controlling a flyback inverter to output, to the target power grid or an electric device, a target alternating current corresponding to the corrected modulation wave signal waveform. By using the corrected modulation wave signal generated by the method of the present application to control the flyback inverter, accurate adjustment of the power factor of the flyback inverter during grid connection can be achieved, and harmonics are reduced.

The application provides a kind of based on thin film lithium niobate dual polarization tunable mode converter and mode multiplexing system, belong to integrated photonic device technical field.It successively includes substrate layer, silicon dioxide layer, lithium niobate film layer and silicon dioxide cladding.Mach-Zehnder structure made on lithium niobate film layer is composed of input waveguide, output waveguide, two Y branch waveguides and two asymmetric strip waveguides;input waveguide and two asymmetric strip waveguides are connected by a Y branch waveguide, and output waveguide and two asymmetric strip waveguides are connected by another Y branch waveguide;the application makes TE and TM base mode have phase difference of π with another arm after passing through phase shift region by adding a wide waveguide and tapered waveguide at both ends, and the phase difference of front and rear arms is changed between π and 0, so as to realize the switching of output mode, and the effect of polarization independence is achieved, with the characteristics of high integration, polarization insensitivity, tunable and large bandwidth.

The application provides a background noise high-order surface wave dispersion extraction method, and belongs to the technical field of seismology. The method first calculates the cross-correlation function of continuous noise data and performs preprocessing to obtain an original dispersion energy spectrum; then a reference phase shift curve between the energy of the base order and the first high-order mode is extracted; the cross-correlation function is phase-shifted based on the curve, so that the base order and the high-order surface wave are separated in time, the high-order part at the negative time is retained and inverse phase shift is performed, and a cross-correlation function containing only the high-order surface wave is obtained; then the high-order surface wave dispersion energy spectrum is obtained through frequency-Bessel transformation, and is spliced with the base order part in the original spectrum to form an enhanced dispersion energy spectrum; finally, the base order and the high-order dispersion curves are extracted after quality control. The application can effectively suppress the interference of the base order sidelobe on the high-order mode, and significantly improve the continuity and signal-to-noise ratio of the high-order surface wave dispersion energy.

The invention provides a compensation capacitor-based T-type phase shift unit and a 6-bit radio frequency phase shifter chip. The compensation capacitor-based T-type phase shift unit comprises a basic T-type phase shift unit and a first compensation capacitor, according to the basic T-type phase shift unit, one end of an inductor serves as an input end to be connected with a drain electrode of a first switch, and the other first inductor serves as an output end to be connected with a source electrode of the first switch; the gate of the first switch is connected with control voltage; the other ends of the two first inductors are connected as a common end; the grid electrode of the second switch is connected with the control voltage and the drain electrode is connected with the common end; a reverse control voltage is connected to the grid electrode of the second switch; source electrodes of the second switch and the third switch are grounded; the third switch, the second inductor and the second compensation capacitor are connected in parallel; and a second switch in the basic T-shaped phase shift unit is connected with the first compensation capacitor in parallel, so that the first compensation capacitor and the second compensation capacitor form a parallel compensation structure. The T-shaped phase shifting unit can effectively solve the problems that an existing T-shaped phase shifting unit is large in area and poor in-band matching performance.

A beam-steering device (100) for spatial steering of a light beam comprises a waveguide array (10) being arranged on a substrate (50) and comprising a waveguide array input (12), multiple waveguides (14-1, 14-2, . . . , 14-i) and a waveguide array output (16), wherein the multiple waveguides (14-1, 14-2, . . . , 14-i) are adapted for simultaneously guiding light from the waveguide array input (12) to the waveguide array output (16) and for forming a light beam downstream of the waveguide array output (16) by superimposing the light guided by the waveguides (14-1, 14-2, . . . , 14-i), a phase shifter device (18) being arranged for applying controlled phase shifts to the light guided in each of the waveguides (14-1, 14-2, . . . , 14-i), and a grating array (22) including at least one patterned grating in optical communication with the waveguide array output (16), the grating array (22) being configured to radiate the light beam out of the beam-steering device (100) to a surrounding, wherein the waveguide array output (16) is arranged such that the light beam is formed downstream of the waveguide array output (16) with a main lobe and side lobes and with a beam angle Φ in a plane of the substrate (50), that is determined by the controlled phase shifts applied to the light by the phase shifter device (18) and a wavelength of the light, a slab propagation region (20) is arranged between the waveguide array output (16) and the grating array (22) such that the main lobe of the light beam is angularly relayed to the grating array (22) and the side lobes of the light beam leave lateral sides of the slab propagation region (20) before reaching the grating array (22), and the grating array (22) is arranged to radiate the light beam out of the beam-steering device (100) with a first angular direction with respect to the substrate (50), that is determined by the beam angle Φ. Furthermore, a method of beam-steering a light beam is described.