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 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.

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 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.

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.