Novel time-domain methods for efficient modelling and design of RF/microwave circuit structures for emerging wireless technology applications

新的射频/微波无线电系统正在出现，用于创新的无线技术应用，如资产跟踪、环境传感和医疗监测。这些无线电通常要求低成本，小尺寸和低功耗，同时具有多通道和多标准功能，在高频率和可能的宽频带下工作。这些要求一直给无线电设计者带来困难的挑战，因为诸如寄生、相互耦合、辐射和干扰等高频效应不能再被忽视。为了解决这些问题，可以准确预测无线电波或宽频带信号行为的时域电磁建模技术已经发展并越来越受欢迎。然而，这些时域方法中的大多数仍然受到其固有数值性质的限制，因此，它们主要局限于对现实世界问题不太有用的电小结构。提出的研究计划旨在通过开发打破传统时域建模方法的方法和技术来解决这个问题。应用的方法将基于我们最近开发的理论框架，该框架概括了数值时域方法。有了这个理论，新的时域方法，不需要预先定义的数值网格，而是采用一组节点将被开发。此外，还将开发新的解法和时域双光提取方法。由于到目前为止还没有其他类似的技术报道，因此该项目的成功将在时域模拟和优化方法方面取得新的突破。最终结果将是通用时域模拟器和优化器以及可用于广泛新兴无线技术设计和应用的新设备。

New RF/microwave radio systems are emerging for innovative wireless technology applications such as asset tracking, environmental sensing and medical monitoring. These radios are often required to be low cost, small size and low power consumption and, at the same time, to have multi-channel and multi-standard functionality, to operate at a high frequency and with a possible wide frequency band. These requirements have always presented difficult challenges for radio designers, since high frequency effects such as parasitics, mutual coupling, radiation and interference can no longer be neglected.In addressing the problems, time-domain electromagnetic modelling techniques that can accurately predict radio wave or signal behaviors over a wide frequency bandwidth have been developed and become increasing popular. However, most of these time-domain methods are still constrained by their inherent numerical properties and, therefore, are limited mostly to electrically small structures that are not very useful to real-world problems. The proposed research program is intended to tackle the issue by developing methods and techniques that break with conventional approaches to time-domain modelling.The methodology to be applied will be based on our recently developed theoretical framework that generalizes numerical time-domain methods. With this theory, novel time-domain methods that require no pre-defined numerical grids but instead employ a set of nodes will be developed. Also, new solution and time-domain diakoptic extraction methods will be developed. Since no other similar techniques have been reported so far, the success of this project will present a new break-through in time-domain simulation and optimization methodologies. The end results will be generic time-domain simulators and optimizers as well as novel devices that can be used for a broad range of emerging wireless technology designs and applications.