On the Use of Probe Signal Derivatives in Spherical Near-Field Antenna Measurements

Kyriakos Kaslis, Olav Breinbjerg

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review

Abstract

Sampling of the probe signal first-order spatial derivative, in addition to the probe signal itself, enables the sampling step to be increased to twice that of the standard sampling criterion. In this work, we investigate - theoretically, numerically, and experimentally - the potential of using probe signal derivatives for spherical near-field antenna measurements with the aim of reducing the measurement time. We present a closed-form Fourier coefficient formula and a closed-form interpolation formula based on signal and signal derivative samples. We validate these new formulas using experimental measurement data and thus demonstrate the feasibility of doubling the sampling step in practice. We discuss different principles for determining the probe signal derivative; and we demonstrate the use of probe signal derivatives, in addition to probe signals themselves, for a full-sphere near-field antenna measurement skipping every second full-circle scan.
Original languageEnglish
Title of host publication2023 Antenna Measurement Techniques Association Symposium (AMTA)
Number of pages6
PublisherIEEE
Publication date2023
ISBN (Electronic)978-1-7362351-5-7
DOIs
Publication statusPublished - 2023
Event2023 Antenna Measurement Techniques Association Symposium - Renton, United States
Duration: 8 Oct 202313 Oct 2023

Conference

Conference2023 Antenna Measurement Techniques Association Symposium
Country/TerritoryUnited States
CityRenton
Period08/10/202313/10/2023

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