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SOUNDING ROCKET EXPERIMENTAL RESULTS OF LARGE NET EXTENSION IN SPACE TO BE APPLIED TO FUTURE LARGE PHASED ARRAY ANTENNA

机译：大型网状空间空间探测的火箭实验结果将用于未来大型相控阵天线

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The University of Tokyo and Kobe University conducted a sounding rocket experiment of large membrane "Furoshiki Satellite" extension and large phased array RF transmission in January 2006. This paper will describe the concept of the "Furoshiki Satellite," its application to phased array antenna, the configuration of the experiment and the experiment results. The University of Tokyo proposed the idea of the "Furoshiki Satellite," a large membrane or a net structure, say, 1km by 1km in size, extended by satellites which hold its corners. The attitude and the shape of the membrane or net structure is controlled by the three or four corner satellites. A large solar power satellite can be configured by distributing on a large net many panels which each has solar cells on one side and RF transmitters on the other side which behave as a large phased array antenna as a whole, as one application of the Furoshiki Satellite. It is difficult to control the position and attitude of the RF transmitters precisely, but using the "retro-directive" method, the system can transmit power towards the pilot-beam's direction even under large disturbances. This is one of the promising systems' concepts for a future large solar power satellite or large phased array antenna, because in this concept, quite a large area can be obtained without any hard structure, and the weight will be independent of the size. To demonstrate the feasibility of the extension of a large net structure and phased array antenna performance, a micro-gravity experiment was conducted on January 22, 2006, using a sounding rocket named "S-310" of JAXA/ISAS, Japan. In the experiment, one mother-satellite and three daughter-satellites, as well as a folded net, was launched altogether to the altitude of 110 km by a sounding rocket S-310. At this altitude the daughters satellites are released from the mother satellite towards three different directions with 120 degree separation, while extending the net, and finally a large regular triangle-shaped net with a 14 m side was configured. The motion during the extension is measured by the INS implemented on the mother and daughter-satellites as well as images of video cameras on the mother-satellite. The four satellites have transmitters on their base that transmit 2.4 GHz microwaves towards the ground using retro-directive phased array method. Finally when a net movement is stabilized, small moving robots are released from the mother-satellite, which move on the net for a certain distance. The experiment was performed very successfully and the obtained data has been analyzed. This paper mainly describes the experiment to evaluate the net deployment and satellite-net dynamics during deployment, and the retro-directive antenna experiment will be reported in [1].
机译：东京大学和神户大学于2006年1月进行了大型膜“ Furoshiki卫星”扩展和大型相控阵RF传输的探空火箭实验。本文将介绍“ Furoshiki卫星”的概念，将其应用于相控阵天线，实验的配置和实验结果。东京大学提出了“ Furoshiki人造卫星”的构想，它是一个大型的膜或网状结构，例如，尺寸为1公里x 1公里，并由固定在角落的卫星延伸。膜或网状结构的姿态和形状由三个或四个角卫星控制。可以通过在大型网络上分布许多面板来配置大型太阳能卫星，这是Furoshiki卫星的一种应用，每个面板的一侧均具有太阳能电池，而另一侧则具有RF发射器，它们整体上可充当大型相控阵天线。 。很难精确控制RF发射器的位置和姿态，但是使用“逆向指令”方法，即使在较大的干扰下，系统也可以朝着先导光束的方向发射功率。对于将来的大型太阳能卫星或大型相控阵天线，这是有前途的系统概念之一，因为在此概念中，无需任何硬质结构即可获得相当大的面积，并且重量与尺寸无关。为了证明扩展大型网络结构和相控阵天线性能的可行性，2006年1月22日，使用日本JAXA / ISAS的名为“ S-310”的探空火箭进行了微重力实验。在实验中，一枚探空火箭S-310将一颗母卫星和三颗子卫星以及一张折叠网一起发射到了110公里的高度。在这个高度，子卫星从母卫星向三个不同方向以120度的间隔释放，同时扩展了网，最后配置了一个大的规则的三角形网，边长14 m。扩展过程中的运动由在母卫星和子卫星上实施的INS以及母卫星上的摄像机图像测量。这四颗卫星在其基座上均具有发射器，这些发射器使用后向相控阵方法向地面发射2.4 GHz微波。最终，当网络运动稳定时，小型移动机器人会从卫星母体上释放，这些机器人会在网络上运动一定距离。实验进行得非常成功，并对获得的数据进行了分析。本文主要描述评估部署过程中的网络部署和卫星网络动态的实验，而定向天线实验将在[1]中进行报道。

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