CAREER: Design, Modeling, and Development of Active Aperture Antennas

9701793华盛顿这项工作的主要目标是开发一种新型的口径天线，能够改变方向性(波束控制)和功率密度(改变聚焦或波束成形)。这些天线的驱动采用了一种不同的机制。该机制使用聚偏氟乙烯(PVDF)膜结合到轻质的金属化聚乳酸结构上。由于薄膜是压电的，薄膜上的任何电压降都会导致薄膜在其拉伸方向上加长。长度变化所产生的横向偏转会产生一个力矩，从而导致天线表面偏转。此外，该提案的教育方面可以总结为三个不同的任务：第一个任务涉及开发实践演示，强调机械、电气和机电系统的主要原理。第二种是使用带有超文本课堂笔记的互动网站，使学生能够进行比一般课堂知识更深入的教学。最后一个组成部分是开发一个互动幻灯片演示文稿，突出非裔美国人、西班牙裔美国人和妇女对工程和科学的贡献。***

9701793 Washington The primary goal of this work is the development of a novel class of aperture antennas capable of variable directivity (beam steering) and power density (variable focusing or beam shaping). The actuation for these antennas is employed using a distinct mechanism. The mechanism employs Polyvinylidene Fluoride (PVDF) film bonded to a lightweight metalized mylar structure. Since the film is piezoelectric, any electrical voltage drop across the film will cause the film to lengthen in its stretch direction. The resulting lateral deflection from a length change causes the production of a moment which causes the antenna surface deflection. In addition, the educational aspects of this proposal can be summarized in three distinct task: The first involves the development of hands-on demonstrations that highlight major principles of mechanical, electrical, and electromechanical systems. The second involves the use of an interactive web site with hypertexted class notes to enable one to teach at level more in-depth than general classroom knowledge. The final component is the development of an interactive slide presentation that highlights the contribution of African Americans, Hispanics, and Women to engineering and science. ***