Method for integrally and accurately positioning double-sided metal film pattern of antenna reflector
A technology of antenna reflector and thin film graphics, which is applied in the direction of antennas and electrical components, can solve the problems of antenna electrical performance degradation, affecting the positioning accuracy of the antenna shell, affecting the etching accuracy and position accuracy, etc., so as to improve the processing accuracy and solve the problem of The effect of laser etching accuracy reduction and impact reduction
Inactive Publication Date: 2021-04-30
LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH
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Problems solved by technology
However, in the actual etching process, the deviation caused by the position accuracy error of the antenna reflector target point itself and the observation error of the human eye will affect the positioning accuracy of the antenna shell in the machine coordinate system, and ultimately affect the FSS of the antenna surface. The etching accuracy and position accuracy of the metal thin film pattern vibrator, resulting in a decrease in the electrical performance of the antenna
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Embodiment 1
[0031] First, make an integrated target on the front and back of the processed reflector shell, and then prepare a layer of metal aluminum film (thickness about 1.5 μm) on the surface of the antenna reflector by arc ion coating, and process the special tooling for the antenna reflector. Clamp the antenna to be processed on the etching tool and fix it on the sample stage. Then, use the visible laser beam and CCD camera system to carry out non-contact online measurement and positioning of the feature points of the workpiece (a total of three target points are measured), and the positioning point, etching profile, etching center point and etching unit graphic data After transferring to the etching software, carry out the laser etching process on the front of the antenna reflector. After the etching is completed, the reflector is turned over and fixed, and the antenna reflector is positioned and the laser etching process on the reverse side is performed using the aforementioned me...
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Abstract
The invention discloses a method for integrally and accurately positioning a double-sided metal film pattern of an antenna reflector. The method comprises the steps of: preparing a front and back integrated target at the skirt edge of the reflector, thereby avoiding or reducing the impact caused by the precision error of the front and back targets of the reflector; and applying a CCD visual amplification auxiliary positioning technology to laser etching of the antenna reflector, so that the double-sided positioning precision of the antenna reflector is greatly improved, and the overall relative position precision of the positive and negative double-layer metal film pattern is ensured in the subsequent laser etching processing process.
Description
technical field [0001] The invention belongs to the technical field of high-precision positioning of antenna reflectors, and in particular relates to an overall precise positioning method for double-sided metal film graphics of antenna reflectors. Background technique [0002] Frequency Selective Surface (FSS) refers to the distribution of periodic gaps on the surface of conductive metal or the arrangement of periodic metal patches on the medium to achieve the purpose of frequency selection, that is, a spatial filter. Three-dimensional curved surface laser etching technology is currently the most advantageous and potential frequency selective surface manufacturing method in the manufacture of antenna reflector FSS. [0003] In order to obtain better frequency selective transmission performance, satellite antennas (especially EHF and VHF antennas) often adopt FSS design with double-layer or even multi-layer composite structure, which puts forward higher requirements for the p...
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IPC IPC(8): H01Q15/00H01Q15/14
CPCH01Q15/0046H01Q15/141
Inventor 尚凯文王瑞吴敢曹生珠魏广杨建平骆水莲赵栋才格桑顿珠张延帅
Owner LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH