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37results about How to "Improve radiation quality" patented technology

Shell assembly, antenna assembly, electronic equipment and manufacturing method

The embodiment of the invention provides a shell assembly, an antenna assembly, electronic equipment and a manufacturing method. The shell assembly comprises a metal conducting plate, a substrate anda frame arranged on the outer periphery of the substrate, wherein the metal conducting plate is arranged on the outer surface of the frame; the metal conducting plate comprises a first side face and asecond side face, a plurality of through holes are formed in the opposite directions between the first face and the second side face, and first strengthening structures for strengthening the structural strength are arranged on the peripheries of the through holes and are positioned on at least one side edge of the first side face and the second side face; and/or second strengthening structures for strengthening the structural strength are arranged between every two adjacent through holes. Through the embodiment of the invention, the structural strength at the positions of the through holes ina steel sheet antenna can be improved so as to improve the reliability of the antenna structure in the using process, the antenna structure can be placed preferably on the electronic equipment with limited clearance area, so that the radiation quality of the antenna structure is strengthened.
Owner:GUANGDONG OPPO MOBILE TELECOMM CORP LTD

A method for measuring the relative radiation performance of large scanning angle sliding spotlight SAR satellite system

The invention discloses a method for measuring relative radiance of large-scanning angle sliding spotlight SAR satellite systems. The method comprises the steps of: selecting a uniform scattering scene as an imaging area; carrying out imaging and range attenuation correction on echo data to obtain single-looking complex image data; getting rid of non-uniform scattering area in the image so as to eliminate adverse effect of subsequent relative radiance measurement; smoothing the image by utilizing a certain rectangular window so as to reduce the noise influence and obtain an amplitude image; averaging multiple images with same beam positions to further reduce the noise influence; determining an azimuth angle and a lower visual angle corresponding to each pixel of the smoothed amplitude image according to radar parameters such as an azimuth scanning range, a range beam width and the like of radar; and carrying out even-order tow-dimensional surface polynomial fitting on the smoothed amplitude image by taking the azimuth angle and the lower visual angle as variables, so as to obtain relative radiance of a system. By utilizing the method, high-precision measurement results for relativeradiance of large-scanning angle sliding spotlight SAR satellite systems can be effectively obtained, so that the method can be used for relative radiation correction of the systems so as to improvethe image quality.
Owner:中国人民解放军61646部队

Voltage control device, ray tube device, and voltage control method

The invention provides a voltage control apparatus and a voltage control method, and a ray tube apparatus. The voltage control apparatus comprises an inverter circuit, a high voltage generator, a first voltage regulation apparatus and a second voltage regulation apparatus, wherein the inverter circuit converts an input direct current into a primary alternating current; the high voltage generator converts the low voltage primary alternating current into high voltage secondary alternating current, and applies the output end voltage to a load at the output end; the secondary alternating current comprises the output end current flowing to the load and the charging current flowing to a capacitor element; the load is connected with the capacitor element in parallel; the first voltage regulation apparatus calculates the deviation between the output end voltage of the high voltage generator and a predetermined first reference voltage, and takes the deviation as the first voltage deviation; the second voltage regulation apparatus obtains a charging voltage value corresponding to the value of the charging current flowing to the capacitor element, calculates the deviation between the charging voltage value and a predetermined second reference voltage, and takes the deviation as the second voltage deviation; and the first voltage deviation and the second voltage deviation are used as control parameters to be fed back to the inverter circuit.
Owner:SIEMENS SHANGHAI MEDICAL EQUIP LTD
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