Space-Based E-Textile Arrays

Next-generation space-based radar and communications arrays require very large apertures in order to achieve the required gain and resolution. The implementation of these very large apertures poses several challenges in order to reduce the cost and weight while improving manufacturability. As system requirements have grown more stringent and required arrays have increased in size, new forms of antenna implementation are desirable. Electronic textiles, or E-textiles, is a candidate new technology that promises lighter weight and lower cost flexible options for satisfying a wide range of array applications. In this paper, we discuss the design of an L band array partitioned into subarrays to realize a total aperture of more than 100 meters in length. Multilayer designs utilizing embroidered antenna patches, knitted polyester spacers and woven ground planes are examined. We discuss the requirements for building a one meter by one meter subarray panel for a precision radar demonstration prototype. Array issues including subarray partitioning, beamwidths, beamsteering, antenna manufacturing tolerances and material electromagnetic property variations as they affect the final system performance are addressed. We summarize by showing that significant array advances are feasible and illustrate the development challenges that this technology faces. Presented at the 2003 Antenna Applications Symposium (27th) held in Monticello, Illinois on 17-19 September 2003. Published in Proceedings of the 2003 Antenna Applications Symposia, v1 p52-66, 2003. This article is from ADA429122 Proceedings of the 2003 Antenna Applications Symposium (27th) Held in Monticello, Illinois on 17-19 September 2003. Volume 1