Abstract
It is significant for the practical application of space-borne mesh-shaped reflectors to reduce the structural complexity under the condition of the far-field electromagnetic (EM) performance being satisfied. To address this problem, an optimal topology configuration design method is proposed for the mesh-shaped reflectors. First, a multifrequency optimization model is established to obtain the mesh-shaped reflector. The reflector nodal deviations in the x-, y-, and z-directions are simultaneously selected as design variables to design the shape of the mesh reflector and realize the required contoured beams within the whole frequency band. Then, based on the multifrequency optimization model, an iterative design technology is proposed to obtain the optimal topology configuration of the mesh-shaped reflector. Finally, a typical example of a mesh reflector with contoured beams covering the continental United States (CONUS) is investigated to demonstrate the feasibility of the method.
Highlights
IntroductionContoured-beam reflectors are widely used in modern satellite communication applications to improve power utilization efficiency and cover the required areas [1]
E large-aperture deployable mesh reflector antenna, which has the advantages of light mass, large aperture, and low folded volume [5, 6], has become one typical kind of space reflector to realize a high gain. erefore, the contouredbeam synthesis based on mesh reflectors has been a meaningful research hotspot
We can obtain that the mesh-shaped reflector can generate the desired contoured beams within the whole frequency band through multifrequency optimization
Summary
Contoured-beam reflectors are widely used in modern satellite communication applications to improve power utilization efficiency and cover the required areas [1]. Because the array-feed approach has expensive and complex beamforming networks, single-feed-shaped reflector antennas are attractive for producing contoured beams [2–4]. There is a great demand for high-gain space-borne reflector antennas in future space applications. Erefore, the contouredbeam synthesis based on mesh reflectors has been a meaningful research hotspot. Most of the current research [2–4] on single-feed shaped reflectors focuses on solid antennas because the shaped solid reflectors can be manufactured and supported through structure design. To achieve high-gain contoured beams, the research on the contoured-beam synthesis for large-aperture mesh reflectors is essential and significant
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