Shape Optimization Design Method of High-Performance Multibeam Antenna for Mixed-Payload Communication Satellite

In the article, a new design scheme for the high-performance multibeam antenna is proposed. In the antenna design, the beam gain (
$G)$
and carrier-to-interference ratio (
$C / I)$
are taken as the optimization goal, the reflector surface is discretized and decomposed into multiple shaped control points as optimization variables, and the shaped surface of the reflector is changed by optimizing the normal undulation of each point in the parabolic plane to achieve the required gain and
$C / I$
performance of each beam comprehensively. This design method can realize the construction and optimization of complex objective functions under the requirements of ultra-wide coverage and different beam widths by adopting an enhanced BAT algorithm (BA). Compared with the traditional multiaperture antenna, this antenna technology reduces the number of antennas from 3 or 4 to 1 by using an oversized reflector. A set of numerical experiments is provided to validate the effectiveness and advantages of the proposed method.