宽带相控阵馈源可展开反射面天线研究 |
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作者姓名: | 薛裕晓 沈永健 张峪维 李敏 刘昊 |
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作者单位: | 北京遥测技术研究所 北京 100076 |
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摘 要: | 为满足星载高增益天线的应用需求,本文设计了一种带有相控阵馈源的伞状可展开反射面天线。首先介绍了反射面天线可展开机构的原理及设计,由碳纤维天线肋和金属编织网面组成反射面,在高精度可展开机构的动作下实现其收拢和展开,从而大幅减小其收藏包络尺寸。对于直径为1.14 m的可展开反射面天线设计了宽带相控阵馈源,采用金属Vivaldi天线作为相控阵单元,根据极化方式、焦径比和扫描范围选择排列成双极化矩形阵列,使可展开反射面天线在8~16 GHz内实现二维波束扫描,通过电磁仿真进行验证,仿真结果表明,宽带相控阵馈源能够有效地增加可展开反射面天线的视场,反射面天线在8 GHz、12 GHz和16 GHz时扫描到0°的增益分别是38.03 dB、40.65 dB和41.48 dB,扫描到+3°的增益分别是37.68 dB、40.68 dB和41.09 dB。
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关 键 词: | 可展开结构 反射面天线 相控阵馈源 波束扫描 |
收稿时间: | 2022/4/2 0:00:00 |
修稿时间: | 2022/6/7 0:00:00 |
A broadband deployable reflector antenna with phased array feed |
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Authors: | XUE Yuxiao SHEN Yongjian ZHANG Yuwei LI Min LIU Hao |
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Institution: | Beijing Research Institute of Telemetry, Beijing 100076, China |
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Abstract: | An umbrella-shaped deployable reflector antenna with phased array feed is designed to meet the requirements of spaceborne high-gain antenna in this paper. Firstly, the principle and design of the deployable mechanism of reflector antenna are introduced. The reflector consists of carbon-fiber rid and braided metal net, which can be closed and expanded under the action of the high-precision deployable mechanism, thus greatly reducing the size of the collection envelope. A wideband phased array feed is designed for the 1.14-meter aperture deployable reflector antenna, and the metal Vivaldi antenna is used as the element of the phased array. According to the polarization mode, the reflector f/D and scanning range, a rectangular dual-polarized Vivaldi array is arranged and used, realizing a two-dimensional scanning range in the frequency range of 8~16 GHz. Simulation results show that antenna gain at 8 GHz, 12 GHz, 16 GHz is 38.03 dB, 40.65 dB and 41.48 dB scanning to 0°, and 37.68 dB, 40.68 dB and 41.09 dB scanning to +3° respectively, validating the wideband phased array feed can effectively increase the field of view of the deployable reflector antenna. |
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Keywords: | Deployable structure Reflector antenna Phased array feed Beam scanning |
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