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High-Precision Calibration of Probe Frequency Response for Near-Field Wideband Measurements
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High-Precision Calibration of Probe Frequency Response for Near-Field Wideband Measurements
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Journal Article
High-Precision Calibration of Probe Frequency Response for Near-Field Wideband Measurements
2025
Overview
Nonlinear calibration of probe frequency response is a common problem in near-field measurement. In this paper, we present an over-the-air(OTA) calibration technique for near-field measurements, predicated on our proposed measurement model. A detailed discussion is provided on the use of metal sphere, plane, and innovative dihedral calibrators, which exhibit scattering properties analogous to those of point target. The effectiveness of the proposed technique is validated through both full-wave simulation and experiment. The calibration method ensures the consistency of the broadband equivalent radiation center and significantly improves the imaging quality and range profile clarity.
Publisher
IOP Publishing
