Millimeter-Wave Near-Field Measurements Using Coordinated Robotics
Millimeter-Wave Near-Field Measurements Using Coordinated Robotics
复制标题
使用协调机器人进行毫米波近场测量
DOI：
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复制
发表时间：
2015
影响因子：
5.7
通讯作者：
J. R. Guerrieri
中科院分区：
文献类型：
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作者：
J. Gordon;D. Novotny;M. Francis;R. Wittmann;Miranda L. Butler;A. Curtin;J. R. Guerrieri
美国国家标准与技术研究院（NIST）最近开发了一种新的机器人扫描系统，用于在100 GHz以上的毫米波（mm波）频率下执行近场测量，即可配置机器人毫米波天线（CROMMA）设施。这款经济高效的系统专为高频应用而设计，能够在多种配置下进行扫描，并能够跟踪扫描中每个点的测量几何形状。CROMMA结合了实时六自由度光学空间测量和机器人运动，可实现25 μm rms以内的天线定位。一个统一的协调计量方法用于跟踪扫描的所有位置方面。矢量网络分析仪用于捕获幅度和相位。我们提出了一个24 dBi的标准增益喇叭在183 GHz的前半球的球面近场测量。使用可配置的扫描能力，使用两种不同的扫描半径。近场数据是在100毫米半径。还在1000 mm半径处进行了直接远场测量。E-和H-平面图案由测量确定并与理论图案进行比较。我们描述了CROMMA的系统组件和协调计量方法。位置的重复性和精度可实现的分析。
The National Institute of Standards and Technology (NIST) recently developed a new robotic scanning system for performing near-field measurements at millimeter-wave (mm-wave) frequencies above 100 GHz, the configurable robotic millimeterwave antenna (CROMMA) facility. This cost-effective system is designed for high-frequency applications, is capable of scanning in multiple configurations, and is able to track measurement geometry at every point in a scan. The CROMMA combines realtime six-degree-of-freedom optical spatial metrology and robotic motion to achieve antenna positioning to within 25 μm rms. A unified coordinated metrology approach is used to track all positional aspects of scanning. A vector network analyzer is used to capture amplitude and phase. We present spherical near-field measurements of the forward hemisphere of a 24-dBi standard gain horn at 183 GHz. Using the configurable scanning ability, two different scanning radii were used. Near-field data were taken at a 100-mm radius. Direct far-field measurements were also taken at 1000-mm radius. The E- and H-plane patterns are determined from the measurements and compared to theoretical patterns. We describe the system components of the CROMMA and the coordinated metrology approach used. An analysis of the positional repeatability and accuracy achievable is also presented.