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. 2015 Feb 22;11:8. doi: 10.1186/s13007-015-0054-x

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© Dadshani et al.; licensee BioMed Central. 2015

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Microwave sensor. (I) – Photograph of the employed sensor system comprising a compact battery - powered circuit board - microwave electronic module, and (II) the zoomed measurement-window: dual mode cavity (copper, A) embedded in a housing with a wheat leaf in measurement position. The aperture in the copper cavity (dark circle, B) allows the evanescent field of the ceramic dielectric resonator (smaller light circle, C) to penetrate into the sample under test. The radial copper rod (D) which is partially covered by the leaf is a requirement for Mode 0 only.