Electromagnetic models for the optimization of body-centric antennas

以身体为中心的无线通信扩展到多媒体（例如，智能谷歌、智能手表和电话）、个人安全设备（例如，智能手机）、无线通信和无线通信领域中的更多应用。G.用于消防员和矿工的遥测诊断）和医疗应用（例如诊断、植入物遥测、遥感和治疗）。特别是在安全设备和医疗应用的情况下，无线电链路需要安全可靠。此外，电子前端包括。天线需要是紧凑的并且集成到应用的底盘中。为了解决这两个方面，无线信道和适当的天线特性的扎实知识是不可避免的。虽然这样的天线特性存在的自由空间通信信道，一个足够的度量上的无线电波传播的身体还没有提供。为了使这种身体为中心的天线的优化，我们的目标是从根本上研究各种无线电信道为身体为中心的应用程序。这将是根据空间波和沿着身体轮廓的表面波波导建立分析路径损耗模型的先决条件。这些模型应能够定义适合这些信道传播现象的体心天线的天线参数。为了处理身体上和身体中的天线的各种组合，将研究以下一般场景：a）身体上到身体上的链路，B）植入物到身体上的链路，c）植入物到植入物的链路。身体上的表面波传播的分析模型将首先基于平坦的传播链路，然后将适应于视线路径和非视线路径的弯曲形状。因此，我们将能够对位于身体上/体内的天线进行建模，并将此模型适用于身体中心传播场景的不同类型的分析路径损耗模型。对于给定信道，交换不同天线的灵活性将使得能够推导出这种天线的基本设计准则。

Body-centric wireless communications expands to ever more applications in the field of multimedia (e.g. smart googles, -watches and phones), personal safety equipment (e. g. telemetry diagnostics for firefighters and miners) and medical applications (e.g. diagnostics, telemetry of implants, remote sensing and treatment). Particularly in the case of safety equipment and medical applications the radio link needs to be secure and reliable. In addition, the electronic frontend incl. the antenna needs to be compact and integrated into the chassis of the application. In order to address both aspects, solid knowledge of the wireless channel and the appropriate antenna characteristic is inevitable. While such antenna characteristics exist for free space communication channels, an adequate metric for radio wave propagation on the body is not yet available.In order to enable the optimization of such body centric antennas we aim at fundamentally investigating various radio channel for body-centric applications. This shall be the prerequisite for the development of analytic pathloss models based on space waves and surface wave guides along the body contour. These models shall enable the definition antenna parameters for body centric antennas fitted to the propagation phenomena of those channel. In order to treat the various combinations of antennas on and in the body the following generic scenarios will be investigated: a) On-body to on-body link, b) implant to on-body link, c) implant to implant link.The analytic model of surface wave propagation on the body will be based on flat propagation links first and will then be adapted to curved shapes for both, line-of-sight paths and non-line-of-sight paths. As a result we shall be able to model an antenna located on/in the body and fit this model to different types of analytic pathloss models for body centric propagation scenarios. The flexibility in exchanging different antennas for a given channel shall enable the derivation of fundamental design guideline for such antennas.