44results about How to "Meet the isolation requirements" patented technology

Provided is a sliding seismic isolation platform which can isolate external disturbance and prevent an exhibited valuable article from being toppled and damaged. When the bottom of the sliding seismic isolation platform suffers from impact of horizontal external force, an article stage can freely reciprocate along X-direction arc-shaped rails and Y-direction arc-shaped rails, external impact is isolated, and the article placed on the article stage remains stable. After the external force disappears, the article stage can return to the initial position under the action of self-gravity. Movement damping of the sliding seismic isolation platform can be adjusted continuously, and therefore a system seismic isolation period is controlled, and the applicable range of the seismic isolation platform is widened.

The invention relates to the technical field of civil engineering, in particular to a shock isolation support with a servo shock isolation system. The shock isolation support with the servo shock isolation system comprises a laminated rubber support, wherein a support protective sleeve is arranged on the outer surface of the laminated rubber support in a sleeving manner; an upper flange plate is connected to the upper end of the laminated rubber support through connecting bolts, and a lower flange plate is connected to the lower end of the laminated rubber support through connecting bolts; an upper cover plate is fixedly connected to the upper surface of the upper flange plate; and a servo control system for enabling the shock isolation support with the servo shock isolation system to perform adaptive adjustment is mounted on the lower flange plate. The shock isolation support with the servo shock isolation system disclosed by the invention is simple in structure; a feedback control technology is introduced, so that the driving optimal feedback control of the shock isolation system is realized; the shock isolation support has an adaptive adjustment mechanism, so that different control targets can be realized; and the shock isolation support has an effective frequency bandwidth and an advantage of being not liable to resonate with a control structure, the mechanical stability and the electromechanical performance stability of the system can be realized, and the shock insulation requirements of engineering structures having special shock insulation requirements, mechanical equipment, valuable articles and the like can be met by the shock isolation support.

The invention discloses a quartering microstrip power divider. The quartering microstrip power divider comprises a shell (1), a signal input and output port group (2) and a power divider assembly (3), wherein the power divider assembly (3) adopts a multi-branch snakelike structure to output power distribution signals and has a plurality of power dividers in topological connection. On the basis of Wilkinson power divider topology, five-branch snakelike routing is adopted to broaden the frequency band, so that the frequency band is expanded to DC-6G; the length of each branch is reduced to be smaller than lambda / 4, and the coupling distance of each branch is shortened as far as possible to reduce the size; through measures of adjusting characteristic impedance of each branch and the like, microstrip isolation is improved, the size and performance of the coupler are enabled to be optimal, and the requirement of miniaturization design and the requirement of isolation are met. The invention aims at solving the technical problem that the miniaturization requirement of a traditional Wilkinson power divider is not enough in the using environment with higher space requirement in the prior art.

The invention discloses an inclined silicon groove etching process. The process includes steps: forming a hard mask layer on the surface of a to-be-etched wafer, coating the surface of the hard mask layer with photoresist, and performing exposure and development to expose a to-be-etched hard mask layer window; performing hard mask etching at the exposed window, and etching to the surface of the wafer; performing silicon groove etching at the window subjected to hard mask etching, and etching to a set value of silicon groove depth, wherein etching gas is SF6, passivation gas comprises O2 and Hbr, bias power is 50-55W, bias power efficiency is 110-130Hz, bias power cycle is 65%-75%, and source radio-frequency power is 1000-1100W; removing photoresist in a non-silicon-groove area according toa dry-process photoresist removal method. A silicon groove side wall angle is optimized from 90 degrees to be close to 80 degrees; in a subsequent silicon groove filling process, voids formed after filling are eliminated, and accordingly breakdown voltage is increased, electric leakage is reduced, and reliability of a dielectric isolation integrated process is improved.

The invention provides a transmission method and communication equipment, and the communication equipment comprises a first port, a second port, a third port, at least one branching unit, and SUL receiving equipment which is used for supporting an SUL function. The first port is connected with a multi-channel antenna supporting multiple frequency bands and the at least one branching unit; the second port is connected with a first RRU of the first network and the at least one branching unit, the third port is connected with a second BBU of a second network and the SUL receiving device, the at least one demultiplexer is connected with the SUL receiving device, and communication protocols of the first network and the second network are different. According to the scheme, by means of the communication equipment, when SUL receiving equipment and RRUs supporting different network frequency bands are deployed at the same station, shunt transmission of uplink signals of multiple frequency bands can be achieved, interference caused by stray downlink signals in a network can be filtered out, and therefore the isolation degree requirement is met.

The invention provides an antenna feeder which is arranged on plane horizontal tails and is connected with a radio altimeter. The antenna feeder comprises a receiving microstrip antenna, a transmitting microstrip antenna, a receiving feeder and a transmitting feeder. The receiving microstrip antenna and the transmitting microstrip antenna are located in horizontal tails on both sides of a verticalstabilizer respectively. The receiving feeder is connected with the receiving microstrip antenna and the radio altimeter. The transmitting feeder is connected with the transmitting microstrip antennaand the radio altimeter. The receiving feeder and the transmitting feeder are crossed to come into the fuselage from the horizontal tails.

The invention discloses an adjustable optical receiver applied to TWDM-PON system and an adjustable filter thereof; the adjustable optical receiver applied to TWDM-PON system comprises an incident collimating device, an F-P cavity filtering standard tool, a drive device and an APD chip packaged in the box body, the F-P cavity filtering standard tool is combined by two or more than two F-P cavity filtering standard tools having the same free space spectrum width; the optical signal enters into the F-P cavity filtering standard tool through the incident collimating device, the drive device adjusts the work wavelength of each F-P cavity filtering standard tool for reaching the agreement and adjusts the wavelength from the F-P cavity filtering standard tool to the TWDM-PON downlink signal for filtering, the APD chip is arranged at the receiving end of the F-P cavity filtering standard tool for converting the filtered optical signal into the electrical signal; for the application of the TWDM-PON, the industrialization is easily formed, the volume is small and the cost is lower.

Provided is a sliding seismic isolation platform which can isolate external disturbance and prevent an exhibited valuable article from being toppled and damaged. When the bottom of the sliding seismic isolation platform suffers from impact of horizontal external force, an article stage can freely reciprocate along X-direction arc-shaped rails and Y-direction arc-shaped rails, external impact is isolated, and the article placed on the article stage remains stable. After the external force disappears, the article stage can return to the initial position under the action of self-gravity. Movement damping of the sliding seismic isolation platform can be adjusted continuously, and therefore a system seismic isolation period is controlled, and the applicable range of the seismic isolation platform is widened.

Methods and hybrid matrix amplifiers are provided. In a method of calibrating a hybrid matrix amplifier of a wireless transceiver, a plurality of signal paths having a digital and an analog portion are toggled such that the analog portion of each of the plurality of signal paths is active only during a corresponding buffer capture interval of a calibration process. The signal paths carry signals to be transmitted by an antenna arrangement. Channel estimates for each of the plurality of signal paths are generated based only on sampling data collected during the corresponding buffer capture interval. The hybrid matrix amplifier is calibrated based on the generated channel estimates.

Embodiments of the present invention provide an attendance check base station, an attendance check method, and a system. The attendance base station includes: a short-distance communication protocol module, a WiFi module and a control module, the transmission distance of the short-distance communication protocol module is less than the transmission distance of the WiFi module; the short-distance communication protocol module is connected with one end of the control module, and the short-distance communication protocol module It includes a short-distance communication protocol chip and a short-distance communication protocol antenna; the WiFi module is connected to the other end of the control module, and the WiFi module includes a WiFi chip, a built-in antenna of the WiFi module with the same working frequency band, and an external antenna of the WiFi module; When the working frequency band of the communication protocol module is the same as that of the WiFi module, control the WiFi chip to switch to the external antenna of the WiFi module. The embodiment of the present invention realizes the coexistence of the WiFi module and the short-distance communication protocol module, so that the attendance base station not only has the traditional wireless function, but also has the attendance and positioning functions, simplifies the deployment scheme of the attendance system, and saves the attendance cost.

An intrinsically safe in-line adapter with an integrated capacitive barrier for connecting a wireless module to an antenna. The in-line adapter (eg, N-type to N-type) can be designed to include intrinsically safe circuitry and an integrated capacitive barrier. Intrinsically safe circuits also include multilayer PCBs and the PCBs may be encapsulated and sealed with mechanical metal housings. Intrinsically safe capacitive barriers can be integrated with coaxial connectors and fitted as part of a fire enclosure to meet explosion safety standards and intrinsically safe requirements. Mechanical metal housings can be isolated by casings (e.g. rubber) to meet isolation requirements. The wireless module can be directly connected to the antenna by using an in-line adapter, via a coaxial connector, and without any special cable assembly.

The disclosed isolated amplifier in use for parallel optical fiber communication system includes following parts and structures: at least two amplifiers are setup at P type substrate; N type regions in quantity of number equal to corresponding number of amplifier are set up at P type substrate; setting up P trap inside N type region, and setting up high adulterated P region inside P trap; through contact hole, the high adulterated P region is connected to metal inner ring, and amplifier is positioned at inner region enclosed by metal inner ring; setting up high adulterated N region at N region outside P trap, and through contact hole, the high adulterated N region is connected to metal outer ring. Features are: simple designed CMOS technique, and satisfied isolation between amplifiers.

The disclosed isolated amplifier in use for parallel optical fiber communication system includes following parts and structures: at least two amplifiers are setup at P type substrate; N type regions in quantity of number equal to corresponding number of amplifier are set up at P type substrate; setting up P trap inside N type region, and setting up high adulterated P region inside P trap; through contact hole, the high adulterated P region is connected to metal inner ring, and amplifier is positioned at inner region enclosed by metal inner ring; setting up high adulterated N region at N region outside P trap, and through contact hole, the high adulterated N region is connected to metal outer ring. Features are: simple designed CMOS technique, and satisfied isolation between amplifiers.

The invention discloses a UV radio frequency (RF) switch network with low insertion losses and high isolation. The UV RF switch network comprises n input switch paths and m output switch paths, wherein each input switch path is connected in series with all the output switch paths to form a network structure, so that n x m switch paths are formed; the UV RF switch network is packaged in an enclosed cavity formed by a substrate and cover plates; a plurality of separated partition cavities are formed in the cavity through partition plates; each input switch path and each output switch path are respectively arranged in two of the partition cavities; RF signals between the partition cavities corresponding to the input switch paths and the partition cavities corresponding to the output switch paths are connected through RF cables; and the cover plates are respectively arranged on the two sides of the substrate, so that the enclosed cavity with an upper layer and a lower layer is formed. The UV RF switch network has the characteristics of small size and high isolation, and can not only meet the isolation requirements but also achieve the minimum insertion losses.

The invention provides a waveband-tunable broadband optical isolator, and belongs to the technical field of optics. The waveband-tunable broadband optical isolator is formed by sequentially arranging a first collimator, a first analyzing crystal, a tunable half-wave plate assembly, a tunable magneto-optic crystal assembly, a second analyzing crystal and a second collimator in the optical path transmission direction. The first analyzing crystal, the second analyzing crystal, the tunable half-wave plate assembly and the tunable magneto-optic crystal assembly are arranged in an outer seal piece. The first collimator and the second collimator extend into the two ends of the outer seal piece respectively. The tunable half-wave plate assembly includes at least two half-wave plates with different working wavebands. The tunable magneto-optic crystal assembly includes a magnetic ring and a movable magneto-optic crystal sleeved with the magnetic ring. By the cooperation between the waveband-tunable half-wave plate assembly and the movable magneto-optic crystal, high-isolation and low-loss transmission of light of different wavebands is achieved, transmission of forward light is guaranteed, the optimal isolation requirement of reverse light is met, and long-term and stable work of a tunable laser system is ensured.

The invention provides a method and a device for combining adjacent channel systems, relates to the field of communication, and aims to enable an isolation bandwidth between the adjacent channel systems to meet an inter-system isolation requirement and realize combination of the adjacent channel systems. The method comprises the following steps: determining a minimum isolation bandwidth needed by combination of a first communication system and a second communication system to be combined, a protection bandwidth of the first communication system and a protection bandwidth of the second communication system; calculating a frequency deviation value according to the three determined numerical values; determining a frequency offset of the first communication system and a frequency offset of the second communication system according to the frequency deviation value; determining combination cut-off frequencies of the first communication system and the second communication system according to the frequency offsets of the first communication system and the second communication system and an adjacent channel point between the first communication system and the second communication system; and using a bandwidth between the combination cut-off frequencies of the two communication systems as the isolation bandwidth between the two communication systems to perform combination.