A STUDY PROGRAM ON LARGE APERTURE ELECTRONIC SCANNING PHASED ARRAY ANTENNAS FOR THE SHUTTLE IMAGING MICROWAVE SYSTEM

摘要

The report is organized In Five sections with be central topic of each section corresponding to the topics oF the Five weekly technical briefings. Section 2 introduces basic phased array theory and discusses performance parameters with emphasis on those parameters relating to microwave radiometry. Section 3 contains brief descriptions of four scanning phased arrays representing current examples of state-of-the-art phased array technology. A discussion of problem areas, both in performance and fabrication, is also included. Section A presents extrapolations of performance characteristics of phased array antennas expected with increased "sizes" up to 20 m x 20 m. Section 5 discusses the possibility of interlacing two or more phased arrays to achieve a multi-frequency aperture. Section 6 with a recommended antenna system to be used for SIMS, and Section 7 with conclusions and recommendations.