50results about How to "High working frequency" patented technology

A double-frequency dual-polarized antenna array belongs to the field of antennas for wireless communication, and solves problems of long feed line lengths and big antenna sizes in existing antenna arrays. The double-frequency dual-polarized antenna array is applicable to networks such as wireless local area networks and WiMax networks. The double-frequency dual-polarized antenna array comprises a horizontal substrate, N horizontally-polarized antennas and N vertical polarized antennas. The N horizontally-polarized antennas which are distributed in a symmetrical and uniform mode around the center of the circle of the horizontal substrate are printed on the horizontal substrate. The horizontally-polarized antennas are completely identical to each other in terms of shape and size. The N vertical polarized antennas are printed on rectangular substrates, and are respectively inserted into N grooves at the circumference of the horizontal substrate, so that each rectangular substrate is perpendicular to the horizontal substrate. A double-frequency dual-polarized structure is employed by the invention, so that the size of the antenna is shortened, and a Mimo technique and an intelligent antenna wave beam switching technique in wireless communication are effectively supported. One typical application is to support wave beam switching technique and a MIMO technique of a 2.4 GHz / 5 GHz wireless local area network, and a system capacity and an anti-interference performance of the wireless local area network can be substantial raised.

An extensible solid surface antenna reflector made from shape memory materials relates to a extensible antenna reflector, which is to resolve the problem that the prior extensible antenna reflector used in aerospace can not simultaneously meet the requirements of large diameter and working at high frequency. The reflector body thereof (1) is in a shape of paraboloid provided with a round opening in the middle, a first shape memory material ring reinforcing component (2) is fixedly connected with the upper edge of the back surface of the reflector body (1), a second shape memory material ring reinforcing component (3) is fixedly connected with the lower edge of the back surface of the reflector body (1), and a radial reinforcing plates (4) arrayed in a parabolic direction are equipped on the back surface of the reflector body (1) between the first shape memory material ring reinforcing component (2) and the second shape memory material ring reinforcing component (3). The invention is provided with a solid surface, the diameter of the antenna is large, working frequency is high (higher than 40 GHz), surface density of the reflector is low, antenna gain is relatively high, and also structure is simple, system structures and control processes is less, and operation reliability of the system is high.

The invention discloses a micro-strip line absorption band-pass filter. The micro-strip line absorption band-pass filter is used for solving the problems that an existing LC absorption filter is not prone to being integrated with an active device and poor in compatibility. The micro-strip line absorption band-pass filter comprises two identical parallel coupled line directional couplers, two identical micro-strip pectinate line band-pass filters and a matched load. The micro-strip line absorption band-pass filter has the advantages of being compact in structure, high in working frequency band, wide in bandwidth, low in cost, prone to being integrated with the active device, good in compatibility and simple to design.

The invention relates to a motion information measurement method based on MIMO frequency-modulated continuous wave radar coherent phase tracking. The method comprises the following steps: reconstructing a received signal of an MIMO frequency-modulated continuous wave radar system into a complex-domain beat frequency signal, and then carrying out operation based on a coherent phase target trackingalgorithm to obtain the motion trail of a detection target. According to the invention, while sub-millimeter motion information measurement is realized, the M-transmitting and N-receiving MIMO radar is equivalent to the one-transmitting and M * N-receiving SIMO radar, so that the spatial resolution of the radar is greatly improved, and accurate measurement of motion information of targets in different directions is realized.

The invention discloses a pellet resistor with a multi-cascade attenuator circuit. Attenuator resistors with sequentially increasing attenuation degree are arranged on a rectangular base plate along the length direction from the input end to the terminal, and are connected by center guide belts arranged on the base plate, two side parts of the base plate are provided with grounding micro strips, and two end parts of the base plate are provided with end face electrodes communicated with the center guide belts. Though practical verification, the product assembled by the pellet resistor with the multi-cascade attenuator circuit has indexes of meeting working frequency of DC-18GHz, standing-wave ratio Vser of not more than 1.15 and three-order intermodulation IM3 of not more than -130dbc@2X+43dbm through practical tests.

The invention relates to a five-phase switch magnetic resistance motor, comprising a stator, a rotor and stator windings, wherein the inner circular surface of the stator is uniformly distributed with stator teeth; the outer surface of the rotor is uniformly distributed with rotor teeth; the stator windings comprise five phases of windings; the number of teeth of the stator is 10i, and the number of teeth of the rotor is 10i-4 or 10i-6, wherein i is an integer more than 0; the stator windings are dual-layer windings and are uniformly distributed in the stator; each phase of winding is formed by in-series connection of two coils which are symmetrically distributed in the stator; and the pitch of the coils is 3. The five-phase switch magnetic resistance motor adopting the structure has the advantages of higher performance-volume ratio, lower copper consumption, higher efficiency and smooth running at low rotating speed.

The invention belongs to the technical field of tunable filters, and relates to a substrate integrated waveguide ferrite tunable band-pass filter. The substrate integrated waveguide ferrite tunable band-pass filter comprises an upper metal copper coating layer, a dielectric layer, a narrow-edge metalized through holes, a lower metal copper coating layer and central inductive metallized through holes, wherein the lower metal copper coating layer is sequentially provided with the dielectric substrate and the upper metal copper coating layer, the upper metal copper coating layer and the lower metal copper coating layer are connected through two rows of mutually parallel narrow-edge metallized through holes, and the upper metal copper coating layer and the lower metal copper coating layer form a substrate integrated waveguide together with the dielectric layer; and the center of the substrate integrated waveguide is provided with a row of central inductive metalized through holes. The substrate integrated waveguide ferrite tunable band-pass filter is characterized in that the dielectric layer is provided with ferrite blocks in an embedded mode at positions close to the two rows of narrow-edge metallized through holes, and the upper surface and the lower surface of each ferrite block are metallized and respectively connected with the upper metal copper coating layer and the lower metal copper coating layer in a conduction mode. According to the invention, the ferrite loaded substrate integrated waveguide tunable band-pass filter is realized so as to meet requirements for the tunable band-pass filter in a substrate integrated system.

An exemplary semiconductor circuit bus system includes: a first bus comprised of distributed buses and having a first transfer rate; a second bus with a second transfer rate higher than the first transfer rate; a transmission node; a bus interface (IF) to connect the transmission node to the first bus; a router which connects the first and second buses; and a reception node connected to the second bus. The bus IF controls the flow rate of data flowing through the transmission routes of the first bus by reference to information about the amounts of transmissible data of the transmission routes. The router allocates the amounts of transmissible data to the transmission routes of the first bus and provides information about the amounts of transmissible data of the transmission routes for the bus IF and also controls the flow rate of the data flowing through the second bus.

An actuating device (1) for carrying out mechanical work by means of a slave piston rod (5) in a hydraulically-operated slave cylinder (2), where the actuating device (1) is made up of a hydraulic pump (3) integrated with a slave cylinder (2) and where the hydraulic pump (3) is driven by a linear electric motor. which consists of a pump piston (7) which is used as rotor in the linear motor at the same time as the pump piston (7) functions as a pumping piston in the hydraulic pump (3) to build up a hydraulic pressure in the slave cylinder (2).

The invention relates to an FPGA static timing analysis algorithm which specifically comprises the steps of extracting all timing paths existing in an entire circuit, checking whether signals meet therequirements of timing constraints when passing through the paths, and finding errors violating the timing constraints by analyzing a maximum path delay and a minimum path delay. According to the method, a critical path that makes the chip timing fail and has a decisive effect on the chip performance can be found more quickly.

The invention discloses a three-port photonic crystal circulator which comprises a Y-shaped photonic crystal waveguide. A magneto-optical dielectric cylinder is arranged at the central position of theY-shaped photonic crystal waveguide. The three-port photonic crystal circulator is compact, low in loss and wide in broadband, can be used for a photonic crystal system complicated in structure and integrated in function, has the immeasurable effect on the aspects of improvement of anti-interference performance and stability of optical paths and the like and is an essential basic element in a photonic crystal large-scale integrated optical path.

The digital delta-sigma modulator includes a signal input for receiving digital samples of N bits, and a digital filter connected to the signal input. The digital filter performs addition / subtraction and integration operations according to a redundant arithmetic coding for delivering digital filtered samples. A quantizer performs a nonexact quantization operation so as to deliver digital output samples of n bits, with n being less than N. The input of the quantizer is connected within the digital filter.

An actuating device (1) for carrying out mechanical work by means of a slave piston rod (5) in a hydraulically-operated slave cylinder (2), where the actuating device (1) is made up of a hydraulic pump (3) integrated with a slave cylinder (2) and where the hydraulic pump (3) is driven by a linear electric motor, which consists of a pump piston (7) which is used as rotor in the linear motor at the same time as the pump piston (7) functions as a pumping piston in the hydraulic pump (3) to build up a hydraulic pressure in the slave cylinder (2).

The embodiment of the invention provides a capacitor electrode, a preparation method and a capacitor. The capacitor electrode comprises at least two two-dimensional material sheet layers and at leastone carbon nano tube layer, wherein one carbon nano tube layer is arranged between every two two-dimensional material sheet layers. By use of the embodiment, the working frequency band can be improvedon the premise of guaranteeing capacitance density.

A start-up method for USB disk with synchronous flash memory includes steps of: (a) writing test data into a data cache zone of a flash memory according to an initiate read write clock of a flash memory controller; (b) reading the test data to a memory zone of a USB controller; (c) comparing the test data in two memory zones, and recording a comparison result and a phase parameter of read write clock; (d) delaying the initiate read write clock for one-unit delay, and repeating steps (a)˜(d); (e) if the comparison result changes from success to failure, stopping repeat the step (d); (f) selecting the phase parameter of the read write clock that corresponds to one of the comparison results in an interval with multiple continuous successful comparison results to determine a clock phase for accessing the flash memory, and then starting up the USB flash disk. The method is quick and stable.

The invention provides an electric / optical frequency hopping carrier generator based on a photon technology. The generator comprises a laser source, a first polarization controller, a polarization modulator, a digital control signal, a second polarization controller, an optical circulator, a polarization beam splitter, a third polarization controller, a first Mach-Zehnder modulator, a second Mach-Zehnder modulator, a microwave modulation signal, a microwave modulation signal, a polarization analyzer and a photoelectric detector. The polarization switch structure is used for controlling the polarization state of the optical signal; the Sagnac ring structure is used for performing different modulation on optical signals in different polarization states; and finally, an electric / optical frequency hopping carrier wave can be obtained by adjusting a digital control signal of the polarization switch structure. In addition, by adjusting the microwave modulation signal frequency of the Mach-Zehnder modulator, the frequency of the electric / optical frequency hopping carrier can be flexibly tuned. The method is flexible in control and simple in structure, and can be applied to important fields such as radars, electronic warfare and wireless communication systems.

A triplate planar slot antenna formed by laying a ground plate, a lower layer side dielectric layer, a lower layer side copper-clad film substrate, an upper layer side dielectric layer, a slot plate and an upper layer side copper-clad film substrate sequentially from the bottom side, wherein a lower layer side copper foil piece is secured to the surface of a lower layer side insulating film by a joining technique not using adhesive, and an upper layer side copper foil piece is secured to the surface of an upper layer side insulating film by a joining technique not using adhesive. In a state where the copper foil pieces are removed, each insulating film has a dielectric constant in the range of 2.0-4.0, a tan δ in the range of 0.001-0.01, and a thickness of 25 μm or less.

The present invention relates to a multi-input multi-output UHF RFID tag antenna which comprises an insulation substrate which is used as a bottom plate and is provided with a microstrip antenna radiating part. The microstrip antenna radiating portion comprises a filter, a pair of single antennas and a microstrip line. The pair of single antennas is symmetrically arranged on the filter. Each of the single antennas is connected to the microstrip line through a feed port respectively and is wound around the microstrip line. The pair of single antennas is used for receiving an electric signal transmitted by a reader and transmitting the electric signal to the filter. The filter is used for filtering the signal noise of the electric signal transmitted by the single antenna and obtaining the electric signal of a needed frequency, and thus transmitting the electric signal to the microstrip line through the single antennas via the feed port. The microstrip line is used as a feed source and transmitting the electric signal of a needed frequency to the processing chip in a tag via the feed port. The multi-input multi-output UHF RFID tag antenna has the advantages of simple structure and small size and has a plurality of operating frequency bands.

The invention discloses a vehicle-mounted radar antenna. The vehicle-mounted radar antenna comprises a radiation layer, a slab waveguide power distribution layer, a mode conversion layer and a feedingnetwork layer which are sequentially arranged from top to bottom, wherein the feeding network layer outputs multichannel TE10 mode signals, the energy distribution of the multichannel TE10 mode signals output by the feeding network layer is approximate to Taylor distribution, and the mode conversion layer is used for separately converting each channel of the corresponding TE10 mode signal outputby the feeding network layer into a quasi-TEM mode line source signal and sending the quasi-TEM mode line source signals to the slab waveguide power distribution layer, each channel of the corresponding quasi-TEM mode line source signal is divided into two parts by the slab waveguide power distribution layer and then sent to the radiation layer, and the radiation layer radiates planar waves outwards. The radar antenna has the advantages that the working frequency band is high on the basis of a low profile and a high gain.

The invention discloses a check point technology-based dual pipeline and a fault tolerance method. The check point technology-based dual pipeline is characterized by comprising a pipeline A, a pipeline B, an instruction cache (301), a backup register group (401), comparison logic (501), a write cache (601), a data cache (701) and a register file (801). According to the check point technology-based dual pipeline, contents of interstage registers of the pipelines are backed up by adopting backup registers; single event faults in pipeline units are detected through the comparison logic; and by utilizing a method for recovering the pipelines by values in the backup register group, fault tolerance is performed on SEU, SET and MBU faults caused by single event effects.

The invention discloses a triple-frequency MIMO antenna applied to a 5G mobile terminal. The antenna comprises a main substrate, the main substrate is provided with two sub-substrates which are perpendicular to the main substrate, the two sub-substrates are arranged in parallel, the two sub-substrates are provided with antenna units which are symmetrical in pairs, each antenna unit comprises an F-type radiation element, a zigzag coupling radiation line, and an L-type feed element, the F-type radiation element and the zigzag coupling radiation line are printed on the outer wall of the sub-substrate, the F-type radiation element comprises a first upper branch used for generating first resonance and a first lower branch used for generating second resonance, the first upper branch and the first lower branch are grounded through a common end, and the zigzag coupling radiation line is inserted into a gap between the first upper branch and the first lower branch, and are coupled with the firstupper branch and the first lower branch respectively to generate thirdresonance. And the L-shaped feed element is printed on the inner wall of the sub-substrate, and the L-shaped feed element is connected with the SMA connector on the main substrate through a feeder line. The antenna can increase the working frequency band, and is simple in structure and small in occupied space.

The invention provides a dual-coupling, multi-band and wide-frequency monopole antenna and a signal coupling method thereof. In the wide-frequency monopole antenna, a positioning space and a fixed space are respectively arranged at two opposite side edges of an insulation support so that a grounding wire is assembled in the positioning space at one side of the insulation support, a coupling side is arranged at the top of the grounding wire, extends in a bending shape and bridges to the top of the fixed space at the other side, a reference grounding surface with relatively large area is arranged at the bottom of the grounding wire and is arranged at the bottoms of the insulation support and a signal line, the signal line is assembled in the fixed space of the insulation support, a coupling part is arranged at the top of the signal line and extends to the coupling side adjacent to the grounding line, a predetermined spacing distance is formed, and a signal feeding part is arranged at the bottom of the signal line, is bent and extends and is used for electrically connecting an external preset signal transmission line. The purpose of larger working frequency band is achieved by a direct feeding method.

The invention relates to the technical field of mechanical vibration measurement, and discloses a device for accurately measuring mechanical vibration by photon counter. The device comprises a laser, an optical isolator, an adjustable attenuator, an optical fiber coupler, a single-photon counter and an FPGA post-processing module, wherein the laser enters the optical fiber coupler after passing through the optical isolator and the adjustable attenuator, and then enters into a measured object. The transmitted signal of the object to be measured returns to the optical fiber coupler and is output to the single-photon counter; the mechanical vibration of the measured object is analysed and obtained by the FPGA post-processing module connecting with the output terminal of the single-photon counter. This invention solves the problem that weak mechanical vibration is difficult to measure, and realizes microscopic vibration measurement of light-permeable objects such as nanofiber cavities by using a single photon counter.

The invention relates to a laminated sheet type ceramic delay line, which belongs to the technical field of electronic components. The delay line comprises a plurality of metal wire delay cell laminated bodies and a plurality of metal ground electrode laminated bodies, wherein the plurality of the metal wire delay cell laminated bodies and the plurality of the metal ground electrode laminated bodies are laminated together in a staggered mode; a plurality of the metal wire delay cells are connected in series in turn and are connected to the surface of a device through metallized through holes; and the surface of the device is provided with a signal input end, a plurality of signal output ends, a ground electrode port and a port mark. With the adoption of a low temperature co-fired ceramic (LTCC) technology, a plurality of the metal delay line cells which are connected in series in turn are integrated in a lamination mode, so that the volume and the weight of the delay line are effectively reduced, and the delay line has the characteristics of good insulation property, great merit factors, high self-resonance frequency, wide working bandwidth and the like; and simultaneously, metal delay cells are embedded in a dielectric ceramic body to improve the reliability of the delay line so that the delay line can adapt to various different working environments.

The invention discloses a vehicle-mounted radar antenna. The vehicle-mounted radar antenna comprises a radiation layer, a slab waveguide power distribution layer, a mode conversion layer and a feedingnetwork layer which are sequentially arranged from top to bottom, wherein the feeding network layer outputs multichannel TE10 mode signals, the energy distribution of the multichannel TE10 mode signals output by the feeding network layer is approximate to Taylor distribution, and the mode conversion layer is used for separately converting each channel of the corresponding TE10 mode signal outputby the feeding network layer into a quasi-TEM mode line source signal and sending the quasi-TEM mode line source signals to the slab waveguide power distribution layer, each channel of the corresponding quasi-TEM mode line source signal is divided into two parts by the slab waveguide power distribution layer and then sent to the radiation layer, and the radiation layer radiates planar waves outwards. The radar antenna has the advantages that the working frequency band is high on the basis of a low profile and a high gain.

The invention relates to an L-shaped slit double-bridge multi-frequency antenna, and belongs to the technical field of antennas. The antenna comprises first and second antenna radiation units and themetal ground; the first antenna radiation unit comprises first, second and third rectangular sheet metal, first and second L groove contained sheet metal, first and second grounding rectangular sheetmetal and a feed structure; and the second antenna radiation unit comprises third, fourth, fifth and sixth rectangular sheet metal. The antenna can obtain working frequency ranges of 1.76-1.94GHz, 2.27-2.44GHz and 2.44-2.66GHz, satisfy bandwidth requirement, obtain stable gain and cover the F, E and D frequency ranges of LTE completely.

The invention discloses a millimeter-wave broadband receiver, which includes a V-band channel, a W-band channel, a radio frequency switch and a subsequent frequency conversion channel; the V-band channel and the W-band channel are output to the subsequent frequency conversion channel through the radio frequency switch; the V-band channels and W-band channels are used for the collection and processing of input signals; the subsequent frequency conversion channel is used for frequency conversion of the output signal of the radio frequency switch. The millimeter-wave broadband receiver of the present invention can overcome the problems of the existing assembly technology and the processing precision of the structural parts are not high enough; through the design of the rectangular waveguide-microstrip transition structure, it is convenient for the components of the circuit to be mixed and integrated; the frequency conversion can be reasonably adjusted according to the usage conditions The gain of the channel; the receiver has high out-of-band rejection characteristics, and has excellent working performance such as extremely high operating frequency, wide operating frequency band, small noise figure, low phase noise, and wide intermediate frequency bandwidth.

A dynamic random access memory device may include DRAM memory cells including several lines of memory cells, and line selection circuitry associated with each line. The line selection circuitry may include a first voltage-elevator stage configured to receive two initial control logic signals each having an initial voltage level corresponding to a first logic state, and to deliver two intermediate control logic signals each having an intermediate voltage level above the initial level and corresponding to the first logic state. The line selection circuitry may also include a control circuit to be supplied by PMOS transistors with a supply voltage having a second voltage level greater than the intermediate voltage level, and configured to, in the presence of the two intermediate control logic signals have their first logic state deliver to the gates of the memory cell transistors, a selection logic signal having the second voltage level.