Collaborative Research: Enabling Technology for MIMO Systems on Mobile Devices: Antennas, Switches, and Packaging

0500860 PapapolymerouMIMO(多输入多输出)系统承诺能够显著提高当前无线连接的容量。未来在便携式设备上实现多输入多输出(MIMO)系统将需要新的天线系统设计方法，如果它们要实现承诺的容量增加。特别是，以传统方式将天线集成到便携式封装中可能会严重限制MIMO系统的性能。由于天线将共享一个封装，除非系统设计正确，否则感应底盘电流可能会导致传播信道之间更高甚至不可接受的相关性。此外，一旦将固定天线集成到机箱中，它们的覆盖面积和与其他天线的耦合也是固定的。PIS的工作旨在开发和演示专门为MIMO系统设计的集成、低成本可重新配置天线系统，以避免这些缺陷。智能优点PI建议为便携式MIMO系统开发低成本集成可重新配置天线技术，采取一种整体方法，使以最小成本实现独立、不相关信道的目标保持在前景。为了将该项目定位为对未来无线系统产生最大影响的项目，他们将把精力集中在两个频段：5-6 GHz ISM频段和60 GHz未授权频段。这项工作将由三个相互关联的推进组成，现总结如下。推力I：用于MIMO系统的方向图可重新配置天线：将开发和设计配备射频微电子机械系统(MEMS)开关的单个方向图可重新配置天线，通过考虑可能或预期的MIMO无线信道，在综合场景中提供特定的辐射方向图。SPECT II：为可重构天线设计和实施的RF MEMS开关：这里开发的开关将使用新型、低成本的有机液晶聚合物(LCP)基板，并且将专门为这些天线设计，以最大限度地提高其可重构性，并将封装和偏置影响等带来的不良行为降至最低。对未来高容量无线通信系统的影响在低成本衬底上开发的便携式、可重新配置的无线MIMO系统将有可能彻底改变信息交换、并行计算以及数据处理或挖掘的方式。此外，该项目将产生的新的可重新配置天线、RF MEMS开关、有机基板处理以及封装和集成技术将促进无线通信、传感器网络和控制等其他领域的进步。更广泛的影响为了扩大这一项目的影响，调查人员将采取几个协调一致的步骤，让本科生和代表不足群体的成员参与这一研究项目。具体地说，他们将开展本科生研究人员暑期交流，招募和指导研究小组中的女性和少数族裔学生，并指导本科生参与可能导致研究生学习的相关高级设计项目。

0500860PapapolymerouMultiple input-multiple output (MIMO) systems promise the ability to dramatically increase the capacity of current wireless connections. Future implementations of multiple input-multiple output (MIMO) systems on portable devices will require new approaches to antenna system design if they are to deliver promised capacity increases. In particular, integrating antennas into portable packages in a traditional way may severely constrain MIMO system performance. Since the antennas will share a package, induced chassis currents may result in higher or even unacceptable correlation between propagation channels unless the system is designed properly. Moreover, once fixed antennas are integrated into a chassis, their coverage area and coupling to other antennas is also fixed. The PIs work aims to develop and demonstrate integrated, low cost reconfigurable antenna systems that are designed specifically for MIMO systems to avoid these pitfalls. Intellectual Merit The PIs propose the development of low cost integrated reconfigurable antenna technology for portable MIMO systems, taking a holistic approach that keeps the goal -- independent, uncorrelated channels achieved with minimal expense -- in the foreground. To position the project to have the greatest impact on future wireless systems, They will concentrate their efforts in two frequency bands: 5-6 GHz ISM band and 60 GHz unlicensed band. The work will consist of three inter-related thrusts, which are summarized here. Thrust I: Pattern Reconfigurable Antennas for MIMO Systems: Individual pattern reconfigurable antennas equipped with RF micro-electromechanical system (MEMS) switches will be developed and designed to deliver specific radiation patterns in integrated scenarios by considering likely or intended MIMO wireless channels. Thrust II: RF MEMS Switches Designed for and Implemented in Reconfigurable Antennas: The switches developed here will use new, low cost organic liquid crystal polymer (LCP) substrates and will be designed specifically for these antennas to maximize their reconfigurability and minimize undesired behavior from packaging and bias effects, etc. Thrust III: Packaging, Integration, and Evaluation of Portable MIMO Antenna Systems: New techniques for packaging and integration of the RF MEMS-equipped antenna systems developed here specifically for MIMO operation will provide a rich experimental framework in which new ideas about the capabilities and limitations of practical MIMO systems can be measured and assessed. Impact on Future High Capacity Wireless Communication Systems The portable, reconfigurable wireless MIMO systems on low cost substrates developed here will have the potential to revolutionize how information is exchanged, how parallel computations are conducted, and how data is processed or mined. Additionally, the new reconfigurable antennas, RF MEMS switches, organic substrate processing, and packaging and integration techniques that will emerge from the project will lead to advances in other areas of wireless communication, sensor networks, and control. Broader Impact To expand the impact of this project, the investigators will take several coordinated steps to involve undergraduates and members of underrepresented groups in this research project. Specifically, they will conduct undergraduate researcher summer exchanges, recruit and mentor women and minority students in their research groups, and guide undergraduates in related senior design projects that may lead to graduate studies.