Reflecting surface antenna double-beam forming design method

Abstract

The invention provides a reflecting surface antenna double-beam forming design method. Through creatively introducing a double-beam covering area shape characteristic analyzing step in a designing process, a targeted initial beam acquiring manner and a corresponding antenna structure configuration strategy are made. Based on searching of a reflection plane scattered field focusing point under planar wave excitation according to a conjugate field matching theory, a rotation rule in long axis direction of a longitudinal movement beam of feed sources at two sides of a focusing point is utilized, and wave beam covering matching design is performed. Through feed source position adjustment, axial torsion of the whole reflection surface antenna system is performed, thereby improving beam covering matching property of double beams and performance of a restraining area, and furthermore improving gain of a double-beam coverage area after optimization. According to the reflecting surface antenna double-beam forming design method, according to a wave beam shape characteristic relationship, antenna layout and the like, and design principles such as a wave beam shape is adjusted according to the feed source position. A design order, a parameter selecting principle and technical details in double-beam design are described, and gain improvement of the double-beam coverage area is realized.

Description

technical field [0001] The invention belongs to the technical field of microwave antennas, and relates to an antenna design method, in particular to an antenna design method capable of improving the gain (or antenna efficiency) of a dual-beam forming coverage area with a special beam relationship. Background technique [0002] With the continuous deepening of the application of satellite communication technology, more and more payload functions are required for satellites, and the demand for antenna integration is also increasing. For communication satellites, it is often desired to achieve more beam coverage under the constraints of limited spectrum resources and limited antenna layout, that is, to use a limited number of antennas to achieve as many beams as possible. The dual (multiple) beam design technology of the reflector provides a possibility to realize the same frequency beam covering different areas in one antenna, and the performance of the two beams is close to t...

AI Technical Summary

Problems solved by technology

If the existing design methods are used directly for dual-beam design, it is impossible to achieve a dual-beam antenna that is close to the performance of an independent antenna, and there are problems such as low radiation beam efficiency and poor beam coverage matching, and the obtained antenna beam gain loss is obvious or the antenna beam Poor performance of the suppression zone (or sidelobe) does not meet the expected antenna design requirements, reducing the technical advantage of the dual-beam design of the reflector

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