Design of Multiband and Common Aperture Remote Sensing Signal Receiving Antenna Feed System
In order to meet the requirements of multi-band remote sensing signal receiving system for S/C/X/Ku/Ka five-band signal common aperture receiving,high-precision pointing and stable tracking over the top of the domain,a multi-band remote sensing signal receiving antenna feed system is developed,which the technical problems of common aperture receiving,narrow beam and difficult signal acquisition and tracking in multi-band antenna are solved.This paper puts forward and adopts the frequency selection sub-plane+rotating feedback mode,high-precision slotted micro-stress adhesive panel and time-optimal nonlinear multi-mode adaptive tracking control technology,which realizes high-reliability common aper-ture reception,high-precision pointing and stable overhead tracking of multi-band signals.The test re-sults show that the designed multi-band common aperture antenna feed system has good performance,and the antenna gain,the first sidelobe level,the zero depth of the difference beam,the tracking accuracy and the pointing accuracy all meet the finger requirements,among which the root mean square error of Ka-band pointing is better than 0.013 6°,Ka the root mean square error of Ka-band tracking azimuth is better than 0.005 6°,and the root mean square error of elevation is better than 0.004 5°.The effective-ness of proposed antenna feed system has been verified,which can be used to guide the design a multi-band remote sensing signal receiving antenna feed system.
multiband antennafrequency selection sub surfacerotating switching feedservo systemoverhead tracking
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