27 results about "Transmission properties" patented technology

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.

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.

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.

[Problem] To provide a substrate-integrated waveguide in which the width of a waveguide can be reduced while transmission characteristics are maintained. [Solution] A substrate-integrated waveguide 1 comprises: a dielectric part 10; a lower conductive layer 21 which is disposed on the lower surface of the dielectric part 10; an upper conductive layer 22 which is disposed on the upper surface of the dielectric part 10; a post column PC1 in which a plurality of conductive posts 41 are disposed along the longitudinal direction of the dielectric part 10; a post column PC2 in which a plurality of conductive posts 42 are disposed along the longitudinal direction and which is provided parallel to the post column PC1; and an inner conductive layer 31 which is disposed inside the dielectric part 10, is electrically connected to the lower conductive layer 21 and the upper conductive layer 22 via the post columns PC1, PC2, and includes a gap G1 which extends along the longitudinal direction and is provided on the post column PC1 side.

The present invention provides a transmission cable that can improve transmission characteristics in a configuration in which two insulated wires of different colors are twisted together. [Solution] The device comprises two twisted insulated wires 11, each of which has a conductor 21 and an insulating coating 23 made of a polyolefin resin with added pigment that covers the conductor 21. The insulating coating 23 of the two insulated wires 11 is colored with pigment in two colors selected from white, pink, orange, light green, sky blue, and yellow.

Provided is a roughened copper foil that can achieve both excellent transmission characteristics and high peel strength when used in a copper-clad laminate and / or a printed circuit board. The roughened copper foil has a roughened surface on at least one side. The roughened surface has a roughness slope tanθ of 0.58 or less, calculated by the formula Rc / (0.5×RSm), from the average height Rc (μm) and the average length RSm (μm) of the profile curve elements, and a minute roughening projected area Rc×RSm of 0.45 μm2 or more, which is the product of the average height Rc (μm) and the average length RSm (μm) of the profile curve elements. 2 above and 2.00 μm 2 below. Rc and RSm are values measured in accordance with JIS B0601-2013 without cutoff based on the cutoff value λs and the cutoff value λc.

Embodiments for adaptive multipath control within an electric vehicle battery pack are disclosed. In a particular embodiment, a method for adaptive multipath control includes modifying at least one of: one or more transmission properties and one or more reflection properties of a metasurface of a module measurement system of a battery management system. In this embodiment, the metasurface is proximate to an antenna of the module measurement system. The method also includes transmitting, via the antenna of the module measurement system, battery sensor data.

This application provides a differential impedance transformation network, an in-phase power coupler, and a power amplifier system, including a differential input port, a differential output port, and N pairs of coupling lines connecting the differential input port and the differential output port, where N ≥ 1. Each pair of coupling lines includes a first coupling line and a second coupling line. The positive input port of the differential input port is connected to the first end of all the first coupling lines, and the negative input port of the differential input port is connected to the second end of all the second coupling lines. The positive output port of the differential output port is connected to the first end of all the second coupling lines, and the negative output port of the differential output port is connected to the second end of all the first coupling lines. This application's solution, by utilizing the odd-mode and even-mode transmission characteristics of the coupling lines, can achieve accurate differential impedance transformation over a wide bandwidth, effectively matching differential signal sources and loads with different impedance levels, and can provide impedance reversal or inversion capabilities to support load modulation.

This invention proposes a method and device for representing long short-term memory (LSTM) photonic neurons. The invention includes: constructing a coupling unit containing a photonic cavity and an electronic cavity; the photonic cavity carries the propagation and modulation of optical signals, while the electronic cavity realizes state storage and dynamic control; establishing a closed-loop feedback mechanism for photoelectric and electro-optic coupling, converting the input optical signal to drive the state evolution of the electronic cavity, and using the state variables of the electronic cavity to modulate the optical transmission characteristics of the photonic cavity; separating long-term and short-term memories based on different time scales, characterizing long-term memory through the inherent attenuation of the electronic cavity, and characterizing short-term memory through rapid modulation of the electronic state by the optical signal; and combining the current input optical signal with historical memory to determine the capacitor voltage change, mapping it to the transmission characteristics of the output optical signal to achieve nonlinear activation and cascaded output. This invention improves the stability of photoelectric coupling and the accuracy of memory separation, realizes efficient computation and memory functions of neurons, adapts to the needs of neuromorphic computing, and reduces energy consumption.

This invention discloses a broadband transmission array antenna incorporating a true time-delay phase transmission line (TDPR), comprising a tunable phase magnetoelectric dipole transmission array and a horn feed. The tunable phase magnetoelectric dipole transmission array includes several periodically arranged antenna elements, each antenna element comprising a true time-delay phase transmission line layer. The transmission phase of each antenna element is determined by the transmission phase of the true time-delay phase transmission line. This invention utilizes the transmission characteristics of the true time-delay phase transmission line, changing its length to alter its transmission phase, and ultimately changing the transmission phase of the magnetoelectric dipole transmission array element. Simulation results demonstrate that the antenna proposed in this invention can achieve high gain and wide bandwidth.

The application relates to a kind of cascade resonator, filter and radio frequency front end module, including piezoelectric substrate, first interdigital transducer, second interdigital transducer and conductive structure;First interdigital transducer, second interdigital transducer and conductive structure are arranged on piezoelectric substrate, two interdigital transducers share a middle bus bar;At least one first cavity is provided on the middle bus bar, and the conductive structure is arranged in at least one first cavity;The middle surface of the conductive structure relative to the middle bus bar is asymmetric structure.Because the conductive structure relative to the middle surface is asymmetric structure, so the whole cascade resonator relative to the middle surface is also asymmetric structure, so it can change the transmission characteristics of cascade resonator, make the frequency of the two resonators cascaded together transverse mode stagger, avoid the resonance of transverse mode, thereby reduce the adverse effects caused by transverse mode superposition.

This invention relates to a method and system for fabricating an ultra-small AWG chip, comprising: using ICP-VD technology on a silicon substrate to controllably grow a low-stress, low-optical-absorption silicon nitride thin film by adjusting plasma power and gas flow rate; covering the silicon nitride thin film with a hybrid mask, and determining a reactive ion etching combination with a primary etching gas and an auxiliary passivation gas according to a target volume ratio; etching the silicon nitride thin film based on the reactive ion etching combination to form a silicon nitride waveguide structure with a sidewall roughness less than a preset roughness threshold; adjusting the thickness and width of the waveguide to achieve a design goal of ultra-thin and ultra-wide waveguide compatible with single-mode transmission characteristics and low bending loss, and designing the bending transition section of the waveguide as a gradually curved structure by transforming optical principles; integrating the designed waveguide into the AWG chip in a preset array configuration, and using a Rowland circle overlapping lithography to compress the overlapping area between the input and output waveguides in the array.

The present application improves the transmission characteristics of a conversion circuit between a coaxial connector and a microstrip line. The conversion circuit has a coaxial connector and a substrate. The coaxial connector has a core wire, and the substrate has a first conductor surrounding and electrically connected to the core wire, a second conductor electrically connected to the first conductor and extending to a side away from the first conductor, and a ground conductor at least partially overlapping the second conductor, the ground conductor defining an opening at least partially overlapping the first conductor, an edge of the opening of the ground conductor including a first portion surrounding the core wire except for a side of the core wire where the second conductor is located and a second portion deeper into the side of the core wire than the first portion from the side of the core wire where the second conductor is located.

The application relates to the technical field of radio frequency microwave passive devices, and particularly discloses a low-ripple balanced high-temperature superconducting band-pass filter based on three-section coupled line cascades, which comprises a dielectric substrate, high-temperature superconducting film layers arranged on the upper and lower surfaces of the dielectric substrate and a high-temperature superconducting film grounding plate, a filter circuit is arranged on the high-temperature superconducting film layer, the filter circuit comprises an input feed line, an output feed line, a cascaded transmission network and a common-mode suppression network; the cascaded transmission network comprises N parallel coupled line units and N+1 parallel branch line units; the common-mode suppression network comprises a transverse transmission line and an open-circuit stub, the transverse transmission line is connected to the center positions of a first parallel branch line unit and a second parallel branch line unit at both ends, one end of the open-circuit stub is connected to the center position of an N+1 parallel branch line unit, and the other end extends outward, the structure can be flexibly expanded, can provide additional common-mode design freedom, and does not affect the differential-mode transmission characteristics.

A ground-high altitude platform-satellite (G-H-S) laser communication system and method based on anisotropic non-Kolmogorov turbulence are provided, and the system includes a ground transmitting terminal, a HAP, a satellite terminal, a ground-HAP uplink and an HAP-satellite uplink. When laser beams are transmitted upwards from the ground transmitting terminal and through the HAP, the laser beams are affected light intensity scintillation, beam drift, and angle of arrival fluctuation, and are transmitted through vacuum channels and received by receiving antenna of the satellite terminal. The HAP is located at stratosphere, and an anisotropic non-Kolmogorov turbulence model is suitable for analyzing turbulence effect in stratosphere. Thus, the anisotropic non-Kolmogorov turbulence model is used to research transmission characteristics of the laser beams. Meanwhile, a hexagon quadrature amplitude modulation (HQAM) is used in the G-H-S laser communication system, which optimizes system performances on basis of improving communication quality, and enhances stability of communication links.

To provide a substrate-integrated waveguide that can reduce the waveguide width while maintaining transmission characteristics. [Solution] The substrate integrated waveguide 1 comprises a dielectric portion 10, a lower conductive layer 21 disposed on the lower surface of the dielectric portion 10, an upper conductive layer 22 disposed on the upper surface of the dielectric portion 10, a post row PC1 in which a plurality of conductive posts 41 are arranged along the longitudinal direction of the dielectric portion 10, a post row PC2 in which a plurality of conductive posts 42 are arranged along the longitudinal direction and provided parallel to the post row PC1, and an internal conductive layer 31 disposed inside the dielectric portion 10, electrically connected to the lower conductive layer 21 and the upper conductive layer 22 via the post rows PC1 and PC2, extending along the longitudinal direction and including a gap G1 provided on the post row PC1 side.

An electronic device and a control method thereof are disclosed. The electronic device comprises a speaker, an internal microphone, a memory storing at least one instruction, and a processor which executes the at least one instruction, wherein the processor can: control the speaker to output a first audio signal; when a second audio signal corresponding to the first audio signal is received through the internal microphone, obtain transmission characteristic information indicating a transmission characteristic of an audio signal in a path between the speaker and the internal microphone on the basis of the first audio signal and the second audio signal; obtain wearing state information about a state in which a user wears the electronic device on the basis of the transmission characteristic information; obtain error information indicating a difference between an acoustic characteristic at a position of the internal microphone and an acoustic characteristic at a target position corresponding to an eardrum position of the user on the basis of the wearing state information; and adjust a frequency characteristic of the first audio signal to correspond to a preset target frequency characteristic on the basis of the error information.

To improve the transmission characteristics of the conversion circuit between coaxial connectors and microstrip lines. [Solution] The conversion circuit comprises a coaxial connector and a circuit board. The coaxial connector has a core wire, and the circuit board has a first conductor surrounding the core wire and electrically connected to the core wire, a second conductor electrically connected to the first conductor and extending toward the side away from the first conductor, and a ground conductor that at least partially overlaps the second conductor, wherein the ground conductor defines an opening that at least partially overlaps the first conductor, and the edge of the opening of the ground conductor includes a first portion surrounding the core wire except on the side where the second conductor is located, and a second portion that extends further inward from the side where the second conductor is located toward the side where the core wire is located than the first portion.

The application discloses a matching structure for a coaxial TSV-RDL transition area, comprising a silicon substrate, the upper and lower ends of the silicon substrate are respectively provided with a silicon dioxide isolation layer, the center of the silicon substrate is provided with a coaxial TSV, the upper end of the coaxial TSV is connected with an upper layer RDL signal transmission component, and the lower end of the coaxial TSV is connected with a lower layer RDL signal transmission component. S 11 、 S 21 The transmission characteristics of the matching structure designed by the application are improved.

This application discloses an optical emitting component, an optical module, and an optical transmission system for use in optical modules, including: a driving circuit, a laser, a circulator, a photodetector, and a processor. Based on the unidirectional transmission characteristics of the circulator, the backscattered optical signal in the optical transmission channel is isolated from the laser and input to the processor. The processor determines the receiving state at the receiving end of the optical transmission channel based on the driving current sampling signal and the backscattered signal, and controls the magnitude of the driving current according to the receiving state. This allows for adjustment of the optical module's transmit optical power according to the actual transmission link configuration, avoiding the problem of device damage or insufficient receiving sensitivity in optical modules with fixed optical power during service cutovers or transmission link changes.

The application relates to the technical field of signal transmission, and provides a multi-channel parallel transmission optimization method and system for a silicon optical engine. The method comprises the following steps: collecting multi-channel transmission characteristics of the silicon optical engine, optimizing transmission signals based on the characteristics to obtain initial transmission signals; calling a predetermined coding and decoding mechanism, and performing coding and decoding processing on the initial transmission signals based on the mechanism to obtain first transmission signals; calling a predetermined encryption and decryption mechanism, and performing encryption and decryption processing on the initial transmission signals based on the mechanism to obtain second transmission signals; taking the second transmission signals as target transmission signals, and performing parallel transmission on the target transmission signals. The application solves the technical problems of low transmission efficiency and unstable signal quality caused by the mismatch of signal transmission characteristics in the multi-channel parallel transmission process of the silicon optical engine, achieves the technical effects of improving the efficiency of multi-channel parallel transmission, and improving the stability and transmission quality of signals through the optimization processing of transmission characteristic compensation and decoding and decryption mechanisms.

A strong PUF circuit with good stability and anti-ML attack capacity is provided. The strong PUF circuit includes n delay modules, n−1 interconnection modules, an arbiter array and an XOR gate, wherein n is an integer greater than or equal to 1, each delay module is implemented based on a bias source structure, and the number of transmission paths of input signals can be increased by means of the characteristics of the bias source structure of the delay module to realize a diversity of transmission, thus realizing a highly complex and unpredictable challenge-response mapping relation without multiple strong PUFs. The transmission characteristics (transmission paths) of the input signals can be further obfuscated by means of the interconnection modules. Only one XOR gate is used for generating response outputs to further improve the stability.

Provided in the present application are an optical transmission medium, a connector, an adapter, an optical module, and an optical communication system. The optical transmission medium comprises a protective sheath and a plurality of optical fibers, wherein the plurality of optical fibers are arranged in the protective sheath; the protective sheath is thermally fused to the optical fibers adjacent to the protective sheath; and each two adjacent optical fibers among the plurality of optical fibers are thermally fused. Therefore, by means of thermal fusion, the protective sheath is integrally connected to the plurality of optical fibers, which improves the fiber exit density while keeping the fiber core size of the optical fibers unchanged, and retains optical transmission characteristics of the optical fibers among the plurality of optical fibers. Thus, the optical transmission medium of the present application has the characteristics of high density, small space occupancy ratio, high precision, high reliability and low cost.

This invention relates to the field of optical interconnect technology, specifically to a MicroLED optical interconnect ring network system for AI large-scale model training. The core design concept is based on the parallel optical transmission characteristics of MicroLED arrays to construct an interconnect system of "fully parallel architecture + ring network topology + training-dedicated processing module". It aims to solve the shortcomings of traditional solutions in terms of bandwidth, latency, synchronization and scalability, and provide high-bandwidth, low-latency and high-reliability interconnect support for AI large-scale model training.