Correlation-Based Uncertainty in Loaded Reverberation Chambers
When reverberation chambers are loaded to increase the coherence bandwidth for modulated-signal measurements, a secondary effect is decreased spatial uniformity. We show that an appropriate choice of stirring sequence, consisting of a combination of mode-stirring mechanisms such as paddle and antenn...
| Veröffentlicht in: | IEEE transactions on electromagnetic compatibility. - 1998. - 66(2018), 10 vom: 13. Okt. |
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| 1. Verfasser: | |
| Weitere Verfasser: | , , , , |
| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2018
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| Zugriff auf das übergeordnete Werk: | IEEE transactions on electromagnetic compatibility |
| Schlagworte: | Journal Article Correlation electromagnetic measurements entropy measurement correlation measurement efficiency measurement uncertainty reverberation chamber wireless system |
| Zusammenfassung: | When reverberation chambers are loaded to increase the coherence bandwidth for modulated-signal measurements, a secondary effect is decreased spatial uniformity. We show that an appropriate choice of stirring sequence, consisting of a combination of mode-stirring mechanisms such as paddle and antenna-platform stirring, can mitigate the potential for increased uncertainty. We develop a new mode-stirring sample correlation model for uncertainty due to the stirring sequence. In a comparison with an empirical uncertainty analysis, the model is found to have an agreement within 2.5%. Our analysis is demonstrated for four loading cases in each of three reverberation chambers. The model is used to determine an optimal stirring sequence for a given chamber setup directly from correlations associated with each stirring mechanism. The model can also be understood in terms of the entropy of a measurement and it is shown that maximizing the entropy corresponds to a minimized uncertainty. The method presented here not only provides insight into sources of uncertainty but also allows users to determine an optimal mode-stirring sequence with minimized uncertainty for a given chamber setup |
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| Beschreibung: | Date Revised 26.10.2024 published: Print Citation Status PubMed-not-MEDLINE |
| ISSN: | 0018-9375 |
| DOI: | 10.1109/tap.2018.2860126 |