Control and Modification of Electric Currents on Existing Structures for Use as Effective Antennas in Wireless Communications Systems

0218629长拟议的研究集中在一种创新的方法上，以开发用于无线网络的辐射系统，其中天线在其本地环境中实际上是不可识别的。它试图研究如何将现有建筑和结构的外部和内部部分用作各种无线应用的发射和接收系统。要成功地开发出基本不可见的天线系统，必须解决的主要问题包括了解：如何有效地激励现有结构如何检查它们的基本辐射特性如何预测它们的辐射场显示以控制它们的辐射特性。在某些情况下，可能必须对现有结构进行微小的修改，但这种操作对视觉和结构的影响将是最小的。可能的调查对象包括建筑物顶部周围的闪电和排水沟，防雷系统，金属窗框，建筑物支架，电力线和支架，现有塔楼和广告牌的部分，金属屋顶或冲天炉，建筑物内部的金属结构部分，以及门框和天花板瓷砖支撑网等非结构导体。拟议研究计划的初始阶段将处理以下任务：开发适当的馈电和匹配技术评估拟议辐射元素的辐射性能调查微扰材料的使用情况以及用于电流和图案控制的结构修改此类天线系统的成功实施对电信世界的影响应该是最重大的。拟议研究的最后结果应提供关于将现有结构用作有效辐射体的可行性的基本信息，并为设计这类新的天线系统提供初步工具和程序。

0218629LongThe proposed research is focused on an innovative approach to develop radiation systems for wireless networks in which the antennas are effectively indiscernible in their local environment. It seeks to examine how both exterior and interior parts of existing buildings and structures might be used as transmitting and receiving systems for various wireless applications. The major issues that must be solved to successfully develop antenna systems that are essentially invisible, include understanding :how to effectively excite existing structureshow to examine their basic radiation propertieshow to predict their radiated fieldshow to control their radiation characteristics.In some cases minor modifications may have to be made to the existing structures, but the visual and structural impact of such actions would be minimal. Possible candidates for investigation include flashing and gutters around the tops of buildings, lightning protection systems, metallic window frames, building supports, power lines and supports, portions of existing towers and billboards, metal roofs or cupolas, portions of the metal structure interior to a building, and non-structural conductors such as door frames and ceiling tile support grids.The initial phase of the proposed research program will address the following tasks:development of appropriate feeding and matching techniquesevaluation of the radiation properties for the proposed radiation elementsinvestigation of the use of perturbing materials and modifications of the structures forcurrent and pattern controlThe impact of the successful implementation of such antenna systems on the world of telecommunications should be most significant. The final results of the proposed study should provide essential information on the feasibility of using existing structures as effective radiators, as well as providing preliminary tools and procedures for the design of this new class of antenna systems.