Equipment Grant: Millimeter Wave Design and Measurement System

这项工程研究设备拨款将帮助主要研究人员进行毫米波（MMW）研究。这项工作得到了美国国家科学基金会在两个主要领域的支持：毫米波器件和电路的分析与设计，以及地球物理介质的毫米波遥感。在遥感领域，主要目标是开发毫米波在随机和非均匀介质（包括雪、植被和地面）中的传播和散射的基本信息。使用车载毫米波雷达进行了实验研究。基于实验数据，已经建立了雪、植被和树木的理论模型。然而，为了了解毫米波与随机介质相互作用的基本过程，需要进行控制实验，但由于缺乏合适的毫米波系统，这方面的努力受到限制。在他们对毫米波器件和电路的研究中，主要研究人员开发了许多计算机代码，这些代码可以对各种各样的平面电路元件进行非常精确的分析。这些程序将被纳入一个用户友好的CAD软件包。此外，毫米波电路将制作和测试，以检查我们的分析模型。所提出的毫米波测量与设计系统应能增强实验能力和建立新的理论模型。

This Engineering Research Equipment Grant will aid the principal investigators work in millimeter wave (MMW) research. This work is supported by NSF in two major areas: MMW device and circuit analysis and design, and MMW remote sensing of geophysical media. In the remote sensing area, the major objective is the development of basic information of the MMW propagation and scattering in random and inhomogeneous media including snow, vegetation, and ground. Experimental studies have been conducted using the truck mounted MMW radars. Based on experimental data, theoretical models for snow, vegetation, and trees have been developed. However, to understand the fundamental process of MMW interaction with random media, controlled experiments need to be conducted, but efforts have been limited by a lack of suitable MMW system. In their study of MMW devices and circuits, the principal investigators have developed a number of computer codes which perform a very accurate analysis of a wide variety of planar circuit elements. These programs will be incorporated into a user friendly CAD package. In addition, MMW circuits will be fabricated and tested in order to check our analytical models. The proposed MMW measurement and design system should enhance the ability to conduct experiments and develop new theoretical models.