MRI: Development of an Anechoic Chamber and Instrumentation for Remote Sensing of Polar Regions and Transportation Interdisciplinary Research and Education

提案编号：CNS 09- 23443 PI：Leuschen，Carlton J.; Braaten，大卫; Gogineni，S. Prasad;塞甘，莎拉;货车der Veen，科内利斯研究所：堪萨斯大学 Lawrence，KS 66045- 7563标题：MRI/开发人员：消声室仪器 该项目在冰盖遥感中心（CReSIS）开发一个消声室，以测量电磁干扰和电磁兼容性（EMI/EMC）和天线特性，旨在提高传感器性能，以满足环境问题。该室提供了一个电磁安静的房间，用于检测极其微弱的发射和精确的天线方向图和阻抗测量。该设施覆盖了很宽的频率范围和入射平面波的衰减。阵列尺度模型上的耦合效应对于能够优化关键信号处理算法是必要的。优化天线阵列性能需要辐射方向图和元件之间的互耦合。该室能够在整个频率范围内使用远场和球形近场扫描技术进行天线方向图测量。因此，这项工作涉及设计和开发一种雷达和传感器技术，用于观测格陵兰和南极冰盖（对声音敏感的系统），并对气候变化造成的快速融化最为明显的沿海地区进行成像。这种超灵敏的探测和成像雷达能够在低于热噪声40 dB的情况下进行射频和微波发射测量，并在100 MHz至18 GHz的大频率范围内工作，在拟议的腔室边界处平面波衰减约100 dB。除了对冰盖建模、冰川学和整个国际极地研究界的潜在贡献外，该设施还可能对教育产生重大影响。它使新的课程在新兴的和越来越重要的EMC/EMI领域纳入实验室练习课程。 因此，该项目为EPSCoR州各级学生提供教育和培训机会，为该地区的企业提供商业机会，并明确解决国际需求。

Proposal #: CNS 09-23443PI(s): Leuschen, Carlton J.; Braaten, David; Gogineni, S. Prasad; Seguin, Sarah; van der Veen, Cornelis Institution: University of Kansas Lawrence, KS 66045-7563Title: MRI/Dev.: Anechoic Chamber & Instr. for Remote Sensing of Polar Regions & Transportation Interdisciplinary R&EProject Proposed:This project, developing an anechoic chamber at the Center for Remote Sensing of Ice Sheets (CReSIS) to measure ElectroMagnetic Interference and ElectroMagnetic Compatibility (EMI/EMC) and antenna characteristics, aims to improve sensor performance to meet environmental issues. The chamber offers an electromagnetically quiet room for detecting extremely weak emissions and accurate antenna pattern and impedance measurements. The facility covers a wide frequency range and attenuation of incident plane-waves. Coupling effects on array scale models are necessary to be able to optimize critical signal processing algorithms. Optimizing antenna array performance requires radiation patterns and mutual coupling between elements. The chamber enables antenna-pattern measurements using both far-field and spherical near-field scanning techniques over the entire frequency range. Thus, the work involves designing and developing a radar and sensor technology for observation of Greenland and Antarctic ice sheets (systems sensitive to sound) and image the coastal regions where rapid melting due to climate change is most evident. This ultra sensitive sounding and imaging radars enable radio frequency (RF) and microwave emission measurements 40 dB below the thermal noise and operates over a large frequency range from 100MHz up to 18 GHz, with attenuation of plane waves by about 100dB at the proposed chamber boundaries.Broader Impacts: Beyond the potential contribution to ice-sheet modeling, glaciology, and the overall international polar research community, the facility is likely to have significant impact on education. It enables new coursework in emerging and increasingly critical EMC/EMI field incorporating laboratory exercises into courses. Hence, the project provides educational and training opportunities for students at all levels in an EPSCoR state, provides business opportunities for businesses in the area, and clearly addresses international needs.