11results about How to "Reduce electromagnetic coupling" patented technology

The invention discloses an electrical cabinet with strong anti-electromagnetic interference capability, and relates to the technical field of electrical cabinets, the electrical cabinet comprises a cabinet body and further comprises a protection device, a sealing door slidably penetrates through the right side of the cabinet body, a moving hole is formed in the front side of the sealing door, and a limiting hole is formed in the front side of the sealing door. The protection device comprises an operation hole, an operation rod, a T-shaped rod, a protection rod, an L-shaped plate, a filter, a reset spring and a protection disc, the sealing door moves to enable the limiting hole to be aligned with the T-shaped rod, and after the T-shaped rod is aligned with the limiting hole, the T-shaped rod moves in the direction away from the protection rod under the elastic force effect of the reset spring; the T-shaped rod moves in the direction away from the protection rod to make contact with the inner wall of the limiting hole and restore limiting of the sealing door, the sealing performance of the cabinet body is kept through the L-shaped plate, the influence of external electromagnetic interference can be prevented, the equipment failure rate is reduced, and therefore the usability of the whole system is improved.

The invention relates to the technical field of PCBs, in particular to a method and system for automatically adjusting the line spacing in PCB design and computer equipment. According to the invention, crosstalk between the adjacent signal lines is effectively reduced by reasonably adjusting the distance between the component and the signal line, impedance matching of the signal lines is better controlled by considering electrical characteristic information, and the line distance in PCB design is adjusted by obtaining the characteristic information of the component, so that the impedance matching accuracy of the signal lines is improved. The interference is reduced, the signal integrity is improved, the electrical performance and the reliability are improved, the crosstalk between the signal lines is effectively reduced by calculating the actual distance between the reference line segment and the component pin, the impedance of the signal lines can be ensured to be matched with the component by considering the pin characteristics and the electrical characteristics, and the reliability of the component is improved. Through accurate analysis of the size and characteristics of the middle line segment group, crosstalk between adjacent signal lines can be effectively reduced, coupling of an electromagnetic field can be reduced through a reasonable line spacing, and the definition of signals is ensured, so that the signal transmission efficiency is improved, and the reflection phenomenon is reduced.

A microstrip antenna for operating within an operating frequency range. The microstrip antenna includes an antenna structure printed on a substrate within a compact area. The microstrip antenna also includes a feedback structure printed on the substrate within the compact area, wherein the feedback structure is configured to function as an impedance matched bandpass filter having a passband defining the operating frequency range. Due to the integrated bandpass filter, the microstrip antenna provides high efficiency, low loss and compact size, suitable for ultra-wideband wireless networks.

The utility model discloses a grounding structure, an electric connector and a connector assembly, belonging to the connector field, the grounding structure is used for grounding a contact member, and comprises a first grounding member and a second grounding member, the first grounding member is inserted in the second grounding member, the first grounding member is electrically connected with the second grounding member, and the second grounding member is electrically connected with the electric connector. And the second grounding piece and / or the first grounding piece are / is electrically connected with the grounding unit of the contact piece. According to the grounding structure, the electric connector and the connector assembly provided by the utility model, the first grounding piece and the second grounding piece are in plug-in fit to form a low-impedance conduction path and a closed shielding loop, so that stable connection and vibration impact resistance can be realized, interference current can be discharged, electromagnetic coupling and crosstalk can be reduced, and the stability and accuracy of signal transmission can be effectively guaranteed.

The utility model discloses a compact high -voltage outgoing line cabinet relates to transformer manufacturing technical field, aims at solving the low space utilization of existing equipment, poor heat dissipation, insufficient reliability and other problems. It includes cabinet body, top cover and base, and the cabinet body is divided into upper, middle, lower layer space through mounting panel, and the lower layer is equipped with lower disconnecting switch, and the contact blade is inner circular arc shape, and is matched with the linkage plate and lock catch structure, reduces the space occupation and promotes the operation accuracy, and the top cover is split type, and forms efficient heat dissipation system with the base cavity, and can switch heat dissipation mode according to temperature, and the integrated control panel, observation window and operating lever are convenient for operation and maintenance. The utility model improves space utilization, power transmission efficiency and equipment stability through the modularization stratification, structural innovation and heat dissipation optimization, and reduces the cost.

A test circuit based on the measurement of pole tower impulse impedance includes: an impulse current generator, an injection line, a current measuring device and a voltage measuring device; the high voltage end of the impulse current generator is connected to the pole tower ground wire cross arm through the injection line, the high voltage end of the voltage measuring device is connected to the pole tower top through a wire, the wire is fixed by a fourth insulating bracket, the wire is located between the fourth insulating bracket and the pole tower and the line segment is arranged horizontally and the length is greater than the height of the pole tower; the low voltage end of the impulse current generator and the low voltage end of the voltage measuring device are both connected to the pole tower foot through a grounding cable, and the injection line and the grounding cable are both arranged overhead; the current measuring device is arranged at one end of the injection line close to the pole tower, and the distance between the first insulating bracket and the pole tower is greater than the height of the pole tower. The present invention realizes the measurement of the impulse impedance of the pole tower itself, and provides data support for lightning protection grounding design.

This invention discloses a dual-band co-aperture circularly polarized antenna, comprising a metal cavity structure and high-frequency antenna elements and low-frequency antenna elements stacked from top to bottom within the cavity. The high-frequency antenna element includes a high-frequency radiating patch layer and a high-frequency feed layer connected to an orthogonal L-shaped probe feed structure. The low-frequency antenna element includes a low-frequency radiating patch layer and an air layer. The low-frequency radiating patch layer has a second radiating patch, an orthogonal edge-coupled feed structure, and a parasitic structure. The feed positions of the two sets of feed structures are arranged orthogonally in a horizontal spatial plane, and their excitation regions do not overlap. The low-frequency radiating patch layer and the bottom surface of the cavity serve as the metal ground planes for the two sets of feed structures, respectively. This invention can significantly improve the isolation between the high-frequency and low-frequency elements of the co-aperture antenna, expand the operating bandwidth, achieve stable circularly polarized radiation, and adapt to the integrated application requirements of satellite navigation systems.

The utility model relates to the technical field of single-phase split transformers, in particular to a body structure of a single-phase four-split transformer. The transformer comprises a transformer body and a transformer body clamping piece, wherein the transformer body adopts a double-column structure and is clamped in the transformer body clamping piece; the transformer body comprises a first capacity winding, a second capacity winding, a third capacity winding and a fourth capacity winding; the first capacity winding and the second capacity winding are small-capacity windings, and the third capacity winding and the fourth capacity winding are large-capacity windings; according to the structure that the first capacity winding and the second capacity winding are arranged diagonally, and the third capacity winding and the fourth capacity winding are arranged diagonally, the weight of the transformer body is further reduced under the condition that the performance is kept unchanged, electromagnetic coupling between coils can be reduced, local overheating caused by nonuniform magnetic leakage is avoided, and meanwhile the capacity of the transformer body is improved. And the structure and the process are simple and convenient.

The invention provides a wave-transparent unit and a radiation device, the wave-transparent unit comprises a PCB substrate, one surface of the PCB substrate is provided with an outer loop circuit and an inner loop circuit, the other surface of the PCB substrate is provided with a common edge circuit and an interdigital coupling structure, the common edge circuit and the inner loop circuit jointly form an equivalent first LC network, and the interdigital coupling structure is connected with the outer loop circuit and the inner loop circuit. The common side line, the outer loop line and the interdigital coupling structure are mutually coupled to form a virtual closed line so as to form a cascade structure of multiple coupling capacitors, and the cascade structure of the multiple coupling capacitors and the outer loop line jointly form an equivalent second LC network. The first LC network is coupled and conducted with the second LC network through the interdigital coupling structure; a reliable technical path is provided for the design of a miniaturized, common-caliber and multi-band radiation device, the wave-transparent performance of the wave-transparent unit at a high band is enhanced, and the problem of electromagnetic coupling among multiple bands is effectively solved.

The present invention discloses a backplane connector base for improving differential impedance and insertion loss, characterized in that it comprises: a base, and side wings arranged on both sides of the base and connected to the base, the base is provided with a plurality of differential pair combination units distributed in an array, the inner sides of the two side wings are respectively provided with positioning grooves, and the differential pair combination units are provided with air holes; due to the adoption of an air region structure and the use of the low dielectric constant and dissipation coefficient of air, the connectors on the connector base of the present invention have smaller electromagnetic coupling, thereby reducing the differential impedance between differential lines and reducing the insertion loss.

The utility model discloses a compact one-to-four power divider, which adopts a two-stage symmetrical branch circuit design, filters through parallel grounding capacitors at input ports, and optimizes input matching characteristics. The first-stage branch circuit realizes impedance matching and inhibits electromagnetic coupling between branches by using a spiral inductor, an isolation capacitor and a resistance network; the secondary branch circuit compensates ultrahigh frequency signal phase and amplitude deviation through a matched transmission line and a minimum grounding capacitor (multiple small-specification capacitors are connected in series), and the isolation degree of an output port is further improved by combining an isolation resistor. Through symmetric frequency division and impedance matching technologies, the power divider realizes balanced distribution of signal amplitude and phase within the frequency band of 6-18GHz, significantly reduces return loss and insertion loss, improves branch isolation to more than 20dB, effectively solves the crosstalk problem in a multi-channel system, and improves the performance of the multi-channel system. And the requirements of scenes such as high-frequency-band wireless communication and radar detection on low-loss, high-isolation and broadband signal distribution are met.