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|Author(s):||David R. Novotny; Joshua A. Gordon; Jason B. Coder; Michael H. Francis; Jeffrey R. Guerrieri;|
|Title:||Evaluation of a Robotically Controlled Millimeter-Wave Near-Field Pattern Range at NIST Determining mechaincal suitability for antenna measurements|
|Published:||April 08, 2013|
|Abstract:||The Antenna Metrology Laboratory at the National Institute of Standards and Technology, USA (NIST) is developing a robotically controlled near-field pattern range for measuring antennas and components from 50 GHz to 500 GHz. This new range is intended to address the need for accurate antenna pattern measurements for a variety of applications including remote sensing and imaging. This system incorporates a precision industrial six-axes robot, six-axes parallel kinematic hexapod, and high precision rotation stage. A laser tracker is used to determine position and calibrate the robot. The robotic positioning arm is programmable and allows scanning in a variety of geometries including spherical, planar, cylindrical, and perform in-situ extrapolation measurements, as well as, other user defined geometries. For planar geometry, the coverage is a rectangle 1.25 m x 2 m. For spherical, radii from 2 cm to 2 m are possible, while the coverage in θ is ±120° and in φ is ±180°. Robot positioning repeatability has been evaluated and determined to be about 30µm, and absolute positioning determination via the laser tracker is ~15µm. Specifics regarding the range evaluation are presented.|
|Conference:||EuCAP 2013, the 7th European Conference on Antennas and Propagation|
|Proceedings:||The 7th European Conference on Antennas and Propagation|
|Dates:||April 8-12, 2013|
|Keywords:||Antenna, calibration, millimeter-wave, near-field, pattern, scanning, terahertz|
|Research Areas:||Measurement Services, Measurement Solutions, Calibrations (Electromagnetic), Electromagnetics|