Wrapped Rib antenna into orbit and beyond

卷绕式肋状天线进入轨道及轨道外

• 批准号: 830231
• 金额: $ 144.62万
• 依托单位: OXFORD SPACE SYSTEMS LIMITED
• 依托单位国家: 英国
• 项目类别: Innovation Loans
• 财政年份: 2021
• 资助国家: 英国
• 起止时间: 2021 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=830231
• 关键词: Wrapped; Rib; antenna; into; orbit

Unlike satellite based optical Earth Observation systems that rely on reflected solar radiation or thermal radiation emitted by Earth, imaging radar instruments work independently of light and heat. Radar is an active system that transmits a beam of radiation in the microwave region of the electromagnetic spectrum.Synthetic Aperture Radar (SAR) can provide day-and-night imagery of Earth. A key advantage of this technique is that clouds, fog and precipitation do not have any significant effect on microwaves, so images can also be acquired independent of weather conditions. Depending on the frequency band of the radar system considerable penetration can be achieved into vegetation, dry soil, ice and snow. This makes SAR the technology of choice for geoscience and Earth monitoring.The proposed project will focus on the development of an innovative deployable SAR antenna for space applications. It will enable Oxford Space Systems to build an antenna suitable for an in orbit demonstration as well as undertaking further technical development of the innovative deployable SAR wrapped rib antenna This is a promising antenna variant, known as 'wrapped rib' is gaining increasing interest across the global space industry with its combination of excellent RF performance with low mass and small stowed volume.. These types of antennas remain stowed during their transit from Earth to space and deploy into their final configuration once their intended orbit is reached.The ultimate goal of an improved SAR antenna design is to enable the acquisition of real-time, high-resolution images of the Earth from space. This can be achieved through satellite constellations carrying wideband, high frequency, high-gain SAR antennas.

与依赖反射太阳辐射或地球发出的热辐射的卫星光学地球观测系统不同，成像雷达仪器独立于光和热而工作。雷达是一种主动系统，它在电磁波谱的微波区域发射一束辐射。合成孔径雷达（SAR）可以提供地球的昼夜图像。这项技术的一个关键优势是，云、雾和降水对微波没有任何显著影响，因此也可以独立于天气条件获得图像。根据雷达系统的频带，可以对植被、干土、冰雪进行相当大的穿透。这使得SAR成为地球科学和地球监测的首选技术。拟议的项目将侧重于为空间应用开发一种创新的可部署SAR天线。这将使牛津空间系统公司能够建造一种适合在轨演示的天线，并承担创新的可部署SAR缠绕肋天线的进一步技术开发。这是一种有前途的天线型号，被称为“缠绕肋”，由于其出色的射频性能、低质量和小装载体积的结合，正在全球航天业中获得越来越多的兴趣。这些类型的天线在从地球到太空的运输过程中保持储存状态，一旦到达预定轨道，就会部署到最终配置中。改进SAR天线设计的最终目标是能够从太空获取实时、高分辨率的地球图像。这可以通过搭载宽带、高频、高增益SAR天线的卫星星座来实现。