Design of a Ka Broadband Satellite Communication Antenna for Low-Earth-Orbit Constellation

Yang Zhao, Zhenyang Liu, Xing Fan, Ping Gao, Tongzhan Liu
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Abstract

Aiming at the demand of small-aperture portable terminals for low-earth-orbit satellite communication, a Ka-band petaloid splash-plate reflector antenna loaded with polystyrene is presented in this paper. Compared to the traditional reflector antennas, the proposed antenna has a wide working band, a high radiation efficiency and a low profile. The main reflecting surface of the proposed antenna adopts a design of split-disassembly structure, and the sub-reflecting surface requires no additional supporting rods, which makes the antenna smaller and more portable. The designed antenna can work at 17.7GHz to 20.2GHz for reception and 27.5GHz to 30.0GHz for transmission. The electrical performance of the antenna is simulated by considering the influence of the structural and processing design. The simulated results show that the VSWR of the antenna across the whole operating band is less than 2, and the aperture efficiency at the reception band and the transmission band is 57%∼68% and 50%∼62% respectively. The correctness of the simulated results were verified by different simulation algorithms, which provides a strong support for the subsequent engineering design.
低地球轨道星座Ka宽带卫星通信天线设计
针对近地轨道卫星通信对小孔径便携式终端的需求,设计了一种ka波段聚苯乙烯负载花瓣状溅射板反射天线。与传统反射面天线相比,该天线具有工作频带宽、辐射效率高、外形小巧等优点。所提天线的主反射面采用分装式结构设计,副反射面不需要额外的支撑杆,使得天线体积更小,便携性更强。设计的天线可以在17.7GHz ~ 20.2GHz工作,在27.5GHz ~ 30.0GHz工作。考虑结构和工艺设计的影响,对天线的电性能进行了仿真。仿真结果表明,天线在整个工作波段的驻波比小于2,接收波段和发射波段的孔径效率分别为57% ~ 68%和50% ~ 62%。通过不同的仿真算法验证了仿真结果的正确性,为后续的工程设计提供了有力的支持。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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