31results about How to "Uniform field distribution" patented technology

A capacitive touch sensor device comprising set of crossing X and Y electrodes whose crossing points form a two-dimensional array of nodes which define a touch sensitive area. As well as the main electrode spines which cross, referred to as zeroth order electrode branches, the electrodes have higher order branches, some of which interdigitate. By varying the dimensions of the electrode branches, such as width and length, the overall area of the X and Y electrodes can be varied relatively independently of each other. It is therefore possible to produce an electrode pattern in which the self capacitances of the X and Y electrodes have a certain ratio, e.g. unity, and thereby compensate for the aspect ratio of the touch sensitive area, and/or to have a certain absolute value, e.g. in order not to overload a touch-sensor controller to which the sensor is to be connected.

The present invention discloses a pulse power device based on an annular ceramic solid state line, which includes several pulse forming lines, two charging inductors, and multiple gas switches connected together as a whole based on a Marx voltage superposition; the pulse forming lines are annular pulse forming lines, and an annular surface of each annular pulse forming line is provided with a gas opening; and the annular pulse forming lines successively overlap together to form one column structure, each charging inductor passes through an inner ring of the annular pulse forming line to be disposed inside the column structure, and an annular insulating plate is disposed between every two annular pulse forming lines. The present invention enables the structure to be more compact with the power volume ratio increased by at least 50% comparing with that of the pulse power system currently reported domestically and overseas, while the coaxial design enables more even electric field distribution of the whole device, thereby benefiting reduction of high-voltage breakdown incidents caused by voltage distortion.

A safety switch, especially for monitoring guard doors on automatic installations, has an actuator (16) and a sensor (18). The actuator (16) includes an actuator antenna (56) and the sensor (18) includes a sensor antenna (46), the actuator (16) and the sensor (18) being transformer coupled to each other when the guard door is in the closed position, Especially like a transceiver. According to one aspect of the invention, the sensor antenna (46) has magnetic orientation properties such that the actuator (16) in at least two mutually perpendicular spatial directions (64, 66, 68) ) Transformer coupling.

A method and apparatus provide an improved EM reverberation chamber which facilitates the dynamic three dimensional (3D) manipulation of EM field polarization within the chamber and produces a uniform field distribution inside the chamber. The chamber includes one or more walls with tunable lumped elements. A controller is provided to generate one or more control signals that are applied to the lumped elements and tunes their impedance in response to the one or more control signals. The result is to generate, within the chamber an electromagnetic field that appears to be random or pseudo-random in polarization, but which is sufficiently uniform in magnitude for EM testing.

A plasmonic device to enhance optical processes in samples lying on or in the proximity of the surface of the device comprises a substrate and a plasmonic structure. The plasmonic structure comprises advantageously a full metal layer and a metal grating in connection with the full metal layer. In addition the plasmonic device may comprise an optional adhesion layer between the substrate and the plasmonic structure and/or, an optional protective layer above the full metal layer or metal grating.

The invention relates to a microwave heater comprising a plurality of microwave generators each emitting microwaves at a frequency in a range of frequencies ranging from 300 MHz to 5.8 GHz which couple into objects to be heated. At least one of the microwave generators emits the microwaves at a first frequency of an upper part of the range of frequencies, the microwaves of the first frequency displaying a first of depth of penetration into the objects to be heated; and at least one other of the microwave generators emits the microwaves at a second frequency of a lower part of the range of frequencies, the microwaves of the second frequency displaying a second depth of penetration into the objects to be heated, the first penetration depth being substantially smaller than the second penetration depth.

In a capacitive touch sensor device, to avoid floating touches causing signal inversion in mutual capacitance measurements, an electrode pattern is used of the type in which the mutual capacitance arises primarily from co-extending electrode portions of the drive and sense electrodes separated by a gap G. The pattern is dimensioned such that the sum of the gap G between co-extending drive and sense electrode portions and the widths Wy of the sense electrodes is made sufficiently small to avoid signal inversion. Namely, the width, Wy, plus the gap, G, is made less than or equal to one of: 4, 3 or 2 times the distance from the touch sensor electrodes to the touch surface, this distance being the touch panel thickness, h.

An laser based image projection system for displaying images, which comprises an LCD device and projection optics. By introducing a diffuser between the LCD device and the projection optics, the quality of the projected image is improved. The visibility of material imperfections in the optical the beam path, which were previously visible in the projected image due to the large field-of-depth of the system, is now reduced.

The invention provides an ultrahigh frequency RFID planar near-field antenna with stable coverage. The ultrahigh frequency RFID planar near-field antenna comprises a metal floor, a dielectric plate and a radiation layer which are stacked in sequence; the radiation layer is composed of a power division network and 2 to 4 radiators; the power division network is located in the middle of the radiation layer, and the radiators are uniformly distributed around the power division network; each radiator comprises a radiator body, a first jumper, a second jumper group and 3 to 18 groups of absorption branches; each radiator body is located in the middle of the radiator, and the absorbing branches surround the radiator body; the power division network comprises first micro-strips of which the number matches that of the radiators; each radiator body is composed of a main body micro-strip; one end of each first micro-strip is connected with one end of the corresponding main body micro-strip at a first point; each main body micro-strip rotates, bends and extends around the corresponding first point; each absorbing branch comprises an arc-shaped micro-strip and a first lumped element; one end of each arc-shaped micro-strip is grounded through the corresponding first lumped element, and the other end is connected with the corresponding main body micro-strip at the outer edge of the corresponding radiator body; the current direction of each arc-shaped micro-strip is opposite to that of the corresponding main body micro-strip.

The invention relates to a meta-material-based L waveband slow wave structure. The meta-material-based L waveband slow wave structure utilizes two mutually orthogonally arranged meta-material resonantunits to form a single periodic slow wave structure, and can overcome the problem that electric fields are not distributed uniformly in an electron beam region because of asymmetry of the meta-material slow wave structure, so that the meta-material-based novel L waveband slow wave structure can operate below the cut-off frequency of a hollow metal waveguide with the same size and has an advantages of miniaturization.

The invention discloses a double reentrant resonant cavity on-line measuring device for measuring the grain moisture content, and belongs to the technical field of microwave application. The double reentrant resonant cavity on-line measuring device comprises a reentrant sample cavity and a reentrant testing cavity which are coupled mutually and are in butt joint. A sample barrel is arranged in thecenter of the sample cavity, and two coupling structures are symmetrically arranged on the outer side of the testing cavity. The coupling structures stretch into the testing cavity through probes, and thus the testing cavity and a measuring instrument are coupled. According to the double reentrant resonant cavity on-line measuring device, the testing efficiency and the testing precision can be improved, the influences of the sample stacking density on the testing result can be eliminated, and the practicability of the measuring device is improved.

The invention relates to a microwave source device in the field of high-power microwaves, in particular to a metamaterial-based low-frequency-band slow wave structure which comprises a first metamaterial resonance unit, a second metamaterial resonance unit and a circular waveguide. The first metamaterial resonance unit and the second metamaterial resonance unit are in 45-degree rotation coupling arrangement to form a single period of the slow wave structure. The metamaterial-based low-frequency-band slow wave structurehas the following technical advantages that the metamaterial-basedslow wave structure can work below the cut-off frequency of the hollow metal circular waveguides with the same size, and has the advantage of transverse miniaturization; due to the sub-wavelength characteristic of the metamaterial, the slow wave structure is shorter in period and has the advantage of miniaturization in the axial direction; due to the local field enhancement effect of the metamaterial-based slow-wave structure, the slow-wave structure has higher coupling impedance, and a device has the advantage of higher beam-wave interaction efficiency; strong electromagnetic coupling between metamaterial slow wave structures is stronger in relativistic electron beam modulation, so that the device has shorter oscillation starting time.

A semiconductor wafer carrier structure includes a carrier body having a surface; a protective film covering the surface; a susceptor disposed on the carrier body; and a patterned coating film on the susceptor, wherein the patterned coating film has two or more different thicknesses, wherein patterns of the patterned coating film are symmetrically distributed with respect to a center of the susceptor.

The invention discloses a solar cell inverter of a MgZnO film transistor having a circular structure and a preparation method thereof. The MgZnO film is prepared, the solar cell inverter structure isdesigned, and the inverter structure is a combination of electrode-insulating layer-channel layer-electrode structures and is formed by sequentially laminating and assembling by a Cr electrode, a SiO2substrate, an MZO channel and an Au electrode. Compared with a traditional inverter, the solar cell inverter has a high blocking voltage and a high pinch-off voltage, is safe and non-toxic and is suitable for use in solar power generation in daily life, the price is lower than that of an IGZO material, the solar cell inverter is suitable for use in large-scale solar cells, a substrate of the solar cell inverter adopts glass, an MZO film is a transparent film, and the solar cell inverter has a greater advantage in aesthetics than conventional solar cells.

Lighting device, comprising a light source (1), which can generate the light (5) used for lighting, optical means, which can generate a first field distribution (7) of the light (5) in a first plane (10), lens means (8), which are arranged downstream of the first plane (10) in the propagation direction of the light (5), such that the first field distribution (7) of the first plane (10) can be imaged by the lens means (8) into a second plane (11), such that a second field distribution (9) can arise there, wherein the plane (12) in which the lens means (8) extend and/or the second plane (11) are/is inclined relative to the first plane (10).

The invention discloses a microwave pyrolysis carbonization furnace resonant cavity. The microwave pyrolysis carbonization furnace resonant cavity comprises four rectangular waveguides (2), a resonantcavity (1) is a rectangular parallelepiped box body, and two of the rectangular waveguides (2) are respectively fixed at each of the upper parts of the opposite inner side surfaces of the resonant cavity (1), wherein the feed ports of the two rectangular waveguides (2) in a diagonal position are transversely arranged, the long edges of the transversely-arranged feed ports are parallel to the bottom surface of the resonant cavity (1), the longitudinal ports of the remaining two rectangular waveguides (2) in the diagonal position are transversely arranged, and the short edges of the transversely-arranged feed ports of the longitudinal ports are parallel to the bottom surface of the resonant cavity (1). The field distribution in the cavity can be uniform without increasing the power of existing magnetrons, so the working efficiency is improved.