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 invention discloses a dual-entry resonant cavity online measuring device for measuring the moisture content of grain, belonging to the technical field of microwave applications. The test device includes two mutually coupled reentrant sample chambers and a test chamber, wherein a sample bucket is arranged in the center of the sample chamber, and two coupling structures are symmetrically arranged outside the test chamber, and the coupling structures are inserted into the test chamber through a probe. In the cavity, the coupling between the test cavity and the measuring instrument is realized. The measuring device can not only improve the testing efficiency and testing precision, but also can eliminate the influence of the bulk density of the sample on the testing result, thereby improving the practicability of the measuring device.

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 an ultra-high frequency (UHF) radio frequency identification (RFID) reader-writer antenna. The UHF RFID reader-writer antenna consists of an upper metal material conductive layer, a lower metal material conductive layer and an insulating material medium layer positioned between the upper metal material conductive layer and the lower metal material conductive layer, wherein a lower bottom plate is a rectangular pure copper plate; the upper layer is a traveling wave-shaped antenna formed by a pure copper feeder line which is laid on the upper surface of the insulating material medium layer; in order to cover all polarization directions and fully cover the area of the overall antenna, the traveling wave shape of the antenna is required to be not less than a period; moreover, the leftmost side of the antenna is connected with a feed power supply; the tail end of the rightmost side of the antenna is connected with the lower bottom plate through a matching resistor; and the width of the feed line of the antenna and the resistance of the matching resistor both depend on the structural shape of the overall antenna: namely the lengths, the widths and the thicknesses of the upper conductive layer, the lower conductive layer and the intermediate insulating material medium layer, and the dielectric coefficient of the medium material. The antenna has large coverage and long reading distance; and a plurality of tags can also be read effectively when passing through at a high speed. Moreover, the structure is simple; and the project is easy to implement and low in cost.

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.

The invention provides a UHF RFID planar near-field antenna with stable coverage, which includes metal floors, dielectric plates and radiation layers stacked in sequence; the radiation layer is composed of a power distribution network and 2 to 4 radiators; the power distribution network is located at the radiation In the middle part of the layer, the radiator is evenly distributed around the power distribution network; the radiator includes the radiator, the first jumper, the second jumper group and 3~18 groups of absorbing branches; the radiator is located in the middle of the radiator, and the absorbing branches Surrounding the radiator; the power division network includes the first microstrip whose number matches the number of radiators; the radiator is composed of the main microstrip; one end of the first microstrip is connected to one end of the main microstrip at the first point; the main body The microstrip rotates and extends around the first point; the absorbing branch includes an arc-shaped microstrip and the first lumped element; one end of the arc-shaped microstrip is grounded through the first lumped element, and the other end is located outside the radiation body with the main microstrip The position of the edge is connected; the current direction of the arc microstrip is opposite to the current direction of the main microstrip.

The invention relates to a tubular bag machine for filling a product into bags, comprising a vertical filling tube (2), a transverse sealing unit (3), a control unit (4) for controlling the tubular bag machine, and a sensor device (5) for detecting the product in the filling tube (2), which is designed to detect the product falling through the filling tube (2), wherein the sensor device (5) has a sensor (51) for emitting electromagnetic waves, and which is connected to the control unit (4), wherein the electromagnetic waves emitted by the sensor (51) remain in a detection space (E) which is confined to one region at the filling tube (2).