213 results about "Transmission properties" patented technology

The invention discloses a passive imaging-based multi-spectral polarized light transmission characteristic test method, which relates to the technical field of optical engineering, and comprises the following steps of: performing space-time alignment and weighted fusion on a multi-spectral polarized image data set by using a multi-dimensional image fusion method to generate a polarization coupling matrix; inputting the polarization coupling matrix into a non-uniform polarized light transmission model, performing depolarization feature extraction by a multi-scale convolutional layer, performing inter-spectrum polarization correlation analysis by an attention mechanism layer, outputting a multi-spectrum polarized light transmission characteristic test scheme, inputting the multi-spectrum polarized light transmission characteristic test scheme into an optical simulation engine, and performing optical simulation on the multi-spectrum polarized light transmission characteristic test scheme. And driving the LabVIEW unit to execute polarized scattered light imaging simulation of the smoke environment. The advanced multi-dimensional image fusion technology and the non-uniform polarized light transmission model are adopted, the image data fusion and imaging simulation precision is improved, the problem of transmission characteristic inversion errors caused by registration deviation is effectively solved, and meanwhile the reliability and precision of transmission characteristic testing in the complex environment are greatly improved.

The invention relates to the technical field of optical communication equipment testing, in particular to an integrated optical module multi-parameter testing system and method.The method comprises the steps that a multi-channel parallel testing unit synchronously collects light spot morphology, divergence angles, insertion loss and return loss space and transmission characteristic parameters through a transmission light path and a reflection light path; the parameter collaborative analysis module performs nonlinear correlation analysis and dynamic performance threshold evaluation based on a cross-dimension correlation model; the intelligent calibration engine dynamically adjusts the test benchmark and compensation parameters according to the environment temperature and the equipment aging attenuation model; the fault diagnosis and prediction unit identifies potential defect types of the collimator, constructs a performance degradation prediction model in combination with a working state and environmental stress, and predicts a performance evolution trend according to test data; and the test report generation module automatically generates a standardized and customized dual-mode test report, a quality grade label and a performance optimization suggestion according to the prediction result and the diagnosis conclusion. Therefore, the problems of poor test precision, low test efficiency and the like in the prior art are solved.

The invention relates to the technical field of optical fiber communication, in particular to a hollow-core optical fiber of a nested structure. The hollow-core optical fiber with the nested structure comprises an outer cladding, a fiber core area located in the center of the optical fiber and a plurality of anti-resonance tube units, each anti-resonance tube unit is composed of a cladding tube and at least three nested tubes; the cladding tubes are arranged around the fiber core area in a radial distribution mode, and the outer cladding layer tightly surrounds the cladding tubes. The circle center point of each cladding tube is the same as that of the center nested tube in the cladding tube, and the outer nested tubes are arranged on the two sides of the center nested tube and symmetrically distributed with the center nested tube as the center, so that a negative curvature nested structure is formed. The cladding tube surrounds the fiber core to form an anti-resonant cavity for optical signals, light leakage to a cladding area is reduced, the anti-resonant effect is enhanced through the negative curvature structures of the cladding tube and the nested tube, the binding capacity of the optical signals in the fiber core is improved, and meanwhile the long-distance low-loss optical transmission characteristic is achieved.

The invention relates to the technical field of optical fiber communication, in particular to a thin-film lithium niobate electro-optical modulator of a stepped electrode, which comprises a substrate, a buffer layer, an optical waveguide, a metal electrode and a transition layer, the optical waveguide is an X-shaped or Y-shaped cutting LN film, a traditional ridge-shaped structure is adopted, the optical waveguide is bonded to the thick SiO2 buffer layer on the substrate, the film can be prepared through various technologies such as ion implantation, wafer bonding and hot slicing, and in order to improve the electro-optical overlapping coefficient and reduce light absorption loss, a silicon dioxide transition layer is used for connecting the metal electrode and the optical waveguide. The metal electrode is of a stepped structure, the electrode can effectively reduce electrical loss and obtain high bandwidth, and the electrode is used for generating an electric field in the aspect of photoelectric efficiency; the electric field is used for changing the functional characteristics of the thin-film lithium niobate layer and further changing the optical transmission characteristics of the waveguide, so that electro-optical modulation is realized. Therefore, the problem that an existing electro-optical modulator is low in modulation efficiency is solved.

The invention discloses a stray light removing system of a diffractive optical element for beam splitting, which comprises a laser light source, the diffractive optical element for beam splitting, a first focusing element, a diaphragm, a second focusing element and a third focusing element which are sequentially arranged along the direction of a laser light path, and is characterized in that the diffractive optical element is used for splitting incident light into a plurality of sub-beams; a plurality of light through holes used for removing stray light are formed in the diaphragm corresponding to the plurality of sub light beams, the focal lengths of the first focusing element and the second focusing element are the same and are F, the distance between the diaphragm and the first focusing element and the distance between the diaphragm and the second focusing element are the same and are L, and L is equal to F. By forming a 4f filtering system, stray light of each sub light beam is effectively removed, and under the condition that the transmission characteristic of light is not changed, the whole structure is simple, operation is convenient, the yield of machined products is guaranteed, and cost is saved.

Optical transmission property estimation device comprising:a transmission waveform restoration unit configured to restore a transmission signal from a reception signal obtained by receiving an optical signal by a coherent detection system; andan estimation unit configured to estimate an optical power distribution in a transmission line by estimating a nonlinear coefficient in a propagation equation of a light wave by a linear least square method based on the restored transmission signal and the reception signal.

The invention provides an accelerator system adjustment method, an accelerator system, electronic equipment and a storage medium. The transmission characteristic data and the charge quantity data of the undeflected beam are obtained through the first beam position detector, and the form and the charge quantity of the undeflected beam are accurately adjusted in combination with a preset adjustment strategy, so that the stability of beam transmission is ensured. And after the form data of the first beam reaches a preset value, monitoring the deflected beam data by using a second beam position detector, and further accurately adjusting the accelerator system to ensure that the deflected beam conforms to the target transmission characteristics. According to the invention, the transmission state of the beam can be accurately controlled in real time, risks of vacuum box breakdown and the like caused by beam mismatch are avoided, the safety and the stability of the system are improved, the possibility of equipment damage is obviously reduced especially under the high-dose-rate transient beam, and the treatment effect and the continuity of Flash radiotherapy are guaranteed.

The invention discloses an ultrasonic shock wave signal gain optimization method based on a time reversal mirror. The method comprises the following steps: S1, acquiring transmission characteristics of a channel; s2, performing system modeling of the virtual time reversal mirror based on the transmission characteristics; and S3, carrying out optimization processing on the TRM excitation signal. The ultrasonic shock wave amplitude is remarkably enhanced, the cracking capacity of the ultrasonic shock wave on high-hardness calcified plaques is improved, the ultrasonic shock wave enhancement device is suitable for shock wave enhancement application scenes in various acoustic systems, and the success rate and reliability of percutaneous coronary intervention therapy are improved.

The invention discloses a circuit board production process management and control method and system based on a multilayer circuit. The method comprises the following steps: establishing an interlayer transmission line parameter model of a multilayer circuit board, and calculating electromagnetic field distribution based on a deformation telegraph equation and a parallel plate resonance effect; performing transmission characteristic simulation verification; optimizing production environment parameters, and selecting an area of which the electric field intensity is lower than 45% maximum value as a wiring optimal area; implementing a layered wiring strategy, and optimizing an interlayer wiring path according to the transmission matrix; production data are dynamically monitored, temperature, humidity and electromagnetic radiation data are collected in real time, and machining parameters are adjusted in combination with a transmission matrix correction value. According to the method, the transmission characteristics are accurately predicted, the production environment parameters are optimized, the influence of the external environment on the performance of the circuit board is effectively reduced, and the stability and reliability of the circuit board are improved. Through establishment of a parameter model and simulation verification, comprehensive management and control of the production process of the multilayer circuit board are realized.

[Problem] To provide a resin film which does not contain fluorine, has not only acoustic performance (sound transmission properties) and air permeability, but also high water repellency and oil repellency, and is suitable for a sound-transmitting waterproof film.　[Solution] This resin film is obtained by curing an ultraviolet curable acrylic resin composition that contains silane-modified inorganic particles having a primary particle diameter of 10-200 nm, wherein, if the average value of heights of recesses and projections obtained on the basis of a cross-sectional shape of the resin film surface obtained from a surface image including height information captured by means of a laser microscope is used as a reference value, the surface has recesses and projections within ±2,500 nm from the reference value, and the air permeability as determined by JIS L1096 B method (Gurley method) is 10-300 seconds / 100 mL.　

Disclosed in the present invention are an unconventional thermoelectric material and a preparation method therefor. The chemical formula of the unconventional thermoelectric material is TiFexRuyCuzSb, wherein x, y and z are respectively the molecule amount of Fe, Ru and Cu in the chemical formula, 1<x+y+z<2, and x and z are not 0. The unconventional thermoelectric material TiFexRuyCuzSb(1<x+y+z<2) provided in the present invention exhibits excellent thermoelectric performance: the Seebeck coefficient thereof exceeds 180 μV / K in a certain temperature range; the figure of merit (zT) can reach 1.2 at 875 K; and the resistivity of TiFexRuyCuzSb exhibits strict linear temperature dependence in the temperature interval of 14 K to 650 K, which breaks through the Mott-Ioffe-Regel (MIR) limit, and exhibits the bad metal transmission properties of non-quasi particles. The unique transmission properties and the high thermoelectric performance benefit from a complicated electronic structure and associated interaction inside TiFexRuyCuzSb, including spin, valence fluctuation, etc., such that TiFexRuyCuzSb can more efficiently convert heat energy into electric energy during the thermoelectric conversion process, thereby improving the energy utilization efficiency.

The invention provides an optical machine assembly angle calculation method and device, computer equipment and a storage medium, and the method comprises the steps: calculating a first rotation matrix of an optical machine and a light receiver through a rotation vector according to the light transmission characteristics of an optical waveguide, and calculating a second rotation matrix of the optical machine according to the optical axis vectors of the light receiver and a stereoscopic vision camera; calculating a second rotation matrix between the stereoscopic vision camera and the ray machine, and determining an attitude transformation relation between the stereoscopic vision camera and the ray machine; and calculating a third attitude matrix of the ray machine according to the attitude matrix of the stereoscopic vision camera, the second rotation matrix and the first rotation matrix, thereby determining the assembly angle of the ray machine according to the third attitude matrix. By accurately calculating the rotation matrix and the attitude matrix, high-precision alignment of poses among the light machine, the light receiver and the stereoscopic vision camera can be ensured, accumulated errors in the assembly angle calculation process can be minimized through distributed calculation and calibration, and reliability and accuracy of an assembly angle calculation result are improved.

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 optical gas concentration sensor includes a sample cell having an inlet port and an outlet port through which gas can pass, a light source configured to emit light into the interior of the sample cell, a photodetector disposed outside the sample cell, and an optical waveguide assembly optically coupling the interior of the sample cell to the detector. The optical waveguide assembly includes a first optical waveguide coupled to the sample cell, a second optical waveguide coupled to the detector, and an optical coupler optically coupling the first optical waveguide to the second optical waveguide. The first optical waveguide has optical transmission characteristics different from those of the second optical waveguide at wavelengths within the wavelength range of 1.5 μm to 18 μm.

This application discloses a method and system for testing the shielding performance of electrical wires, relating to the field of functional testing technology. The method includes: acquiring multi-frequency external excitation response data of the cable under test without disassembling it; obtaining the transmission characteristic curve by measuring the frequency domain according to a preset measurement arrangement and scanning steps; establishing a hierarchical equivalent network model based on the transmission characteristic curve and structural parameter set, and generating the parameter range to be inverted for each shielding layer; prioritizing the inversion of the outermost layer and subtracting the influence of the outermost layer to obtain an updated transmission characteristic curve; solving the parameters of the inner layers on the updated transmission characteristic curve and obtaining the interlayer coupling correction factor by comparing the difference sequence with the coupling threshold; summarizing and comparing with each threshold to output the location and type of failure layer; and outputting which layer and what failure mechanism the result falls into, reducing the risk of rework and disputes caused by the inability to attribute the cause in the overall test.

The present invention provides a printed circuit board that allows for easy formation of fine circuits, improved transmission characteristics, reduced warping, and miniaturization of via diameters when forming embedded circuits. [Solution] This disclosure relates to a printed circuit board 100A comprising: a first insulating material 111a having a first opening v1; an insulating layer 111 laminated on one surface of the first insulating material 111a, filling at least a portion of the first opening v1, and comprising a second insulating material 111b made of a different material from the first insulating material 111a; a wiring pattern 112 arranged on one surface of the first insulating material 111a and embedded in the second insulating material 111b such that one surface is exposed from one surface of the second insulating material 111b; and a via pattern 113 spaced apart from the first insulating material 111a within the first opening v1 and embedded in the second insulating material 111b such that one surface is exposed from one surface of the second insulating material 111b.

The present invention provides a cable for high-frequency signal transmission and a manufacturing method thereof. When transmitting high-frequency signals, it is difficult for the cable to attenuate, and even when bending and wiring high-frequency signals in a narrow space, the transmission characteristics are hardly reduced. The cable (1) for high-frequency signal transmission at least includes a conductor (2), an insulator (3) covering the periphery of the conductor (2), a coating layer (4) covering the periphery of the insulator (3), and a sheath (6) covering the periphery of the coating layer (4). Among them, an anti-cracking layer (7) is provided between the insulator (3) and the coating layer (4). The anti-cracking layer (7) is arranged in contact with the insulator (3) and has a coating layer (4) on its outer surface. The anti-cracking layer (7) is composed of a resin film (71). In response to the bending of the insulator (3), it bends while relatively moving in the cable length direction, thereby suppressing cracking of the coating layer (4).

This application belongs to the field of optical simulation technology, specifically disclosing an optical simulation method for organic light-emitting diode (OLED) devices containing microlens structures. The technical solution of this application first derives the light radiation and propagation characteristics of the nanoscale active stacked thin film structure in the OLED device, generating light source data for micrometer-scale simulation; then, based on the micrometer-scale microlens structure and encapsulation layer structure in the OLED device, it defines the optical transmission characteristics of each interface; next, combining the light source data, the optical transmission characteristics of each interface, and the curved surface structure of the microlens structure, it performs ray tracing on the OLED device including the curved surface structure; finally, it statistically analyzes and calculates the light emitted from the OLED device after ray tracing including the curved surface structure, obtaining the emission spectrum of the OLED device containing microlens structures. This application constructs an optical simulation method applicable to multi-scale microlens OLED devices containing complex three-dimensional curved surface structures.

The invention relates to a switchable light filter (5) comprising a first optical element (1) which transmits light or at least partially absorbs it depending on its polarization state and / or its direction of incidence, first means (7a) for shifting an angular spectrum of light, means for selectively generating a first electric field (EF1) or a second electric field (EF2), a linear polarization filter (P), a liquid crystal layer (3) arranged between the linear polarization filter (P) and the first optical element (1), on which the first electric field (EF1) or the second electric field (EF2) acts and which, depending thereon, influences the polarization state of light passing through it, so that the transmission properties of the switchable light filter (5) differ between a first operating mode B1 and a second operating mode B2, and so that light,which, from the perspective of an observer, is incident on the first optical element (1) from behind, has an angular spectrum shifted compared to the light originally incident on the switchable light filter (5), whereby in at least one of the operating modes B1 or B2 the absorption of the switchable light filter (5) for light incident on the switchable light filter (5) from at least one direction deviating from the first preferred direction by at least 20° is increased. The invention further discloses screens that can be operated in at least two operating modes B1 or B2.

Provided is a roughened copper foil that can achieve both excellent transmission characteristics and high peel strength in the case of a copper-clad laminate and / or printed circuit board. The roughened copper foil has a roughened surface on at least one side. The microtip particle volume calculated by the formula (Vmp+Vmc) / Spd from the solid volume Vmp of the protruding peak portions, the solid volume Vmc of the central portions, and the peak apex density Spd of the roughened surface is 1.300 μm 3 or less, and the cross-sectional height difference Rdc is 0.95 μm or more. Vmp, Vmc, and Spd are values measured in accordance with ISO 25178, and Rdc is a value obtained in the form of the difference in the cross-sectional height c in the height direction at load length ratios of 20% and 80% in accordance with JIS B0601-2013.

A processing method for a wafer (11) for processing a wafer (11), wherein a component (15) having several elevations (17) is formed in each of areas of a front surface of the wafer (11) which is divided by several intersecting division lines (13) formed in an intersecting manner, wherein the processing method for a wafer (11) comprises: a training step for a first cut groove (23) to form first cut grooves (23) each having a depth corresponding to a finished thickness of each of the component chips (27), by a first cutting blade (14) having a first thickness, along the parting lines (13) of a front surface side (11a) of the wafer (11); a scanning step of the front surface of the wafer (11) with visible light using a scanning unit (18) in which an alignment mark is detected and the parting line (13) to be cut is detected based on the alignment mark, prior to the training step for a first cut groove; a sealing step to seal the front surface of the wafer (11) including the first cut grooves (23) with a sealing material (20) after the training step for a first cut groove (23) has been carried out; a grinding step to grind the wafer from a rear surface side (11b) of the wafer (11) to the finished thickness of each of the device chips (27) to expose the sealing material (20) in the first cut grooves (23) after the sealing step has been performed; an alignment step for picking up the front surface of the wafer (11) by the sealing material (20) by the pickup medium (18) using infrared light from the front surface (11a) of the wafer (11), detecting an alignment mark and detecting the parting line (13) to be cut based on the alignment mark after the grinding step has been performed; and a division step for cutting the sealing material (20) in the first cut grooves (23) by a second cutting blade (14A) having a second thickness smaller than the first thickness of the first cutting blade (14), along the division lines (13) from the front surface (11a) of the wafer (11) and parts of the wafer (11) into individual device chips (27), each of which has its front surface and four side surfaces surrounded by the sealing material (20) after the alignment step has been performed, wherein in the sealing step the front surface of the wafer (11) is sealed with a sealing material (20) which has such a transmission property that infrared rays which are to be absorbed by the infrared light receiving means (18) pass through the sealing material (20).

The invention discloses an adjustable low-pass filter circuit which comprises two first defected ground structures, two second defected ground structures, two first additional defected ground structures and two second additional defected ground structures which are symmetrically distributed relative to an X axis and are sequentially etched along the Y axis at the position, under a micro-strip transmission line, on a ground plane, and the two first defected ground structures, the two second defected ground structures, the two first additional defected ground structures and the two second additional defected ground structures are symmetrically distributed relative to the X axis. The first defected ground structure is connected with the first direct current bias circuit, and the second defected ground structure is connected with the second direct current bias circuit; variable capacitance diodes are inserted into the first defected ground structure and the second defected ground structure, the sizes of introduced equivalent capacitance and equivalent inductance are changed by changing the sizes of the defected ground structures and the additional defected ground structures, the transmission characteristics of the microstrip transmission line are changed, and the transmission characteristics of the microstrip transmission line are changed by changing the bias voltage of the direct-current bias circuit. The equivalent capacitance of the variable capacitance diode is changed, and the cut-off frequency of the low-pass filter circuit is tuned; the filter has the advantages that high selectivity of the filter is guaranteed, and meanwhile high stopband suppression is taken into consideration.

The invention relates to a photonic radar system (100) and a method for operating a photonic radar system (100) with monitoring of the transmission properties, wherein the photonic radar system (100) comprises a central station (200) and at least one radar head device (300, 300-n) designed as a transmitter and / or receiver module, which is connected to at least one individual optical transmission medium (400, 400-n), wherein signals exchanged for environmental detection are modulated onto at least one optical carrier signal generated by the central station, wherein the method comprises the steps: Generating a test signal with at least one monotonically changing frequency ramp, preferably constant, Generating a reference signal corresponding to the test signal, Coupling the test signal into the at least one transmission medium (400, 400-n), Extracting a back-transmitted test signal component to a detection unit (630), and either optical superimposition of the transmitted test signal with the reference signal of the test signal to form an optical difference signal and Capturing the differential signal or Alternatively, the retransmitted test signal can be captured and electronically superimposed on the captured retransmitted test signal with the reference signal to generate the difference signal and generate an OFDR spectrum (920) based on the difference signal, as well as determine parameters of at least the structures of the OFDR spectrum (920) correlated with the radar head devices (300, 300-n) and store the parameters as calibration information in a memory (670) and / or output the calibration information.

The invention discloses an optical interconnection link self-calibration method and device based on dynamic tensor reconstruction, equipment and a medium, and relates to the field of computers.The method comprises the steps that based on the tensor operation requirement of a multi-modal task, the hierarchical connection relation, the operation precision mode and the data interaction path of a calculation unit are adjusted; the dynamic tensor reconstruction of the calculation unit is realized; wherein the calculation unit adopts a hierarchical architecture design; an optical interconnection hardware system matched with the reconstructed computing unit is configured; the system comprises an optical interconnection link and a calibration unit. And dynamic self-calibration is carried out on optical signal parameters of the optical interconnection link by utilizing a calibration unit based on transmission characteristic data of the optical interconnection link acquired in real time in a tensor operation process. Therefore, the computing power utilization rate is effectively improved, synchronous error accumulation of large-scale tensor operation is avoided, meanwhile, a data conversion circuit does not need to be additionally arranged, conversion delay is eliminated, and waste of hardware resources is reduced.

The invention discloses an SIW transmission array antenna fusing multiple phase modulation modes, and belongs to the technical field of transmission array antennas. According to the antenna, antenna units form an array according to a period, and a feed source horn is arranged at the bottom of the antenna unit array. The antenna unit comprises two layers of linear polarization metasurfaces which are arranged up and down and three layers of SIW phase delay lines in the middle. According to the multiple phase modulation modes, the transmission characteristics of the SIW are utilized, the positions of metal through holes corresponding to SIW delay lines are changed, and then the length or the width of the SIW structure is changed, or the length and the width of the SIW structure are changed at the same time, so that the transmission phase of the SIW is changed, and finally the transmission phase of the transmission array unit is changed. Simulation proves that the SIW transmission array antenna provided by the invention can realize high gain and wide bandwidth.

This lens device reduces noise caused by lens drive that is recorded during video recording, even when different cameras are attached. [Solution] A lens device that is detachably attached to an imaging device and has a lens communication unit that communicates with the imaging device comprises a lens drive control unit that drives optical elements included in the lens device and a storage unit that stores information regarding the driving sound of the optical elements. The lens drive control unit determines the driving conditions of the optical elements based on the sound transmission characteristics of the imaging device and information regarding the driving sound when driving the optical elements.

The application discloses a signal layer exchange structure optimization method and device suitable for a DDR5 printed circuit board, equipment, medium and product, relates to the signal layer exchange structure optimization field, and the method comprises the following steps: obtaining the signal layer exchange structure of the DDR5 printed circuit board and target impedance values corresponding to surface layer traces and inner layer traces in the signal layer exchange structure; establishing an equivalent transmission line model according to basic structure parameters of the signal layer exchange structure in the vertical direction of the printed circuit board; performing time-domain reflection impedance simulation on the equivalent transmission line model in a transient solution mode to obtain actual impedance values; and adjusting the layer exchange conductor width in the signal layer exchange structure and the parallel distance between the layer exchange conductor and the vertical GND reference layer according to the difference between the actual impedance values and the target impedance values to obtain an optimized signal layer exchange structure. The application can improve the quality, stability and transmission characteristics of signal transmission.

The present application provides a kind of optical modulator, even in the case where signal electrode traverses light branch part or light synthesis part, the degradation of transmission characteristic is inhibited.An optical modulator is constituted by forming optical waveguide and modulation electrode for modulating optical wave propagating in the optical waveguide on substrate, and housing the substrate in the housing, characterized in that the optical waveguide at least has light branch part for branching one optical wave into two or light synthesis part for synthesizing two optical waves into one, the modulation electrode has signal electrode and ground electrode, and part of the signal electrode is configured to traverse the light branch part or the light synthesis part, the optical modulator is provided with suppression unit (for example, resin layer) for suppressing the change of intensity ratio of optical wave branched in the light branch part or intensity ratio of optical wave synthesized in the light synthesis part due to the signal electrode traversing the light branch part or the light synthesis part.

The present invention provides an active noise control device. The active noise control device (10) controls a speaker (18) to output a canceling sound in order to cancel out noise transmitted from a vibration source. The active noise control device comprises a control signal generating unit (68), a secondary path filter updating unit (84), and a feedback filter setting unit (23). The control signal generating unit (68) processes a reference signal corresponding to a specified frequency through a feedback filter and an adaptive notch filter as a decimation filter to generate a control signal for controlling the speaker (18); the secondary path filter updating unit (84) adaptively updates the secondary path filter in sequence; and the feedback filter setting unit (23) sets the feedback filter according to the secondary path filter. Thus, noise can be reduced even if the transmission characteristics change.

The invention discloses a vertical transition interconnection structure for integrating a phased-array antenna. The vertical transition interconnection structure comprises a laminated structure and a plurality of quasi-coaxial structures arranged in the laminated structure, the laminated structure comprises an upper structure and a lower structure, and each of the upper structure and the lower structure comprises multiple layers of microstrip plates; the upper structure and the lower structure are connected through a BGA solder ball; each quasi-coaxial structure comprises a signal blind hole and a plurality of grounding through holes arranged around the signal blind hole, and the signal blind holes and the grounding through holes vertically penetrate through the multiple layers of microstrip plates in the upper structure or the lower structure; in the upper structure or the lower structure, two adjacent signal blind holes are connected through a strip-shaped transmission line. The vertical transition interconnection structure provided by the invention is small in size, easy to integrate and low in cost, is suitable for an application scene of high-density three-dimensional stacking in an integrated phased array, and has the transmission characteristics of wide band and low loss.