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

0218629Long拟议的研究集中在一个创新的方法来开发无线网络的辐射系统，其中的天线是有效地在其本地环境中不可辨别的。 它旨在研究如何既有建筑物和结构的外部和内部部分可能被用作各种无线应用的发射和接收系统。要成功地研制出基本上看不见的天线系统，必须解决的主要问题包括：如何有效地激励现有的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以控制它们的辐射特性。在某些情况下，可能必须对现有的结构进行微小的修改，但这些行动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防水板和排水沟、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、金属屋顶或圆顶、建筑物内部的金属结构部分、和非结构导体，如门框和天花板瓷砖支撑网格。拟议研究计划的初始阶段将解决以下任务：适当的馈电和匹配技术的发展评估拟议的辐射元件的辐射特性的使用的扰动材料和修改的结构的电流和方向图控制的调查成功实施这样的天线系统的影响在世界电信应该是最显着的。拟议研究的最终结果应提供关于利用现有结构作为有效辐射器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.