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A Free-space Technique for Measuring the Complex Dielectric Constant of Sawdust

In this paper an improved free-space technique for measuring the complex dielectric constant of materials in grains or powder (like the sawdust) is proposed. While the known free-space techniques rely on strong assumptions that are quite unrealistic in real experimental conditions, the proposed improved free-space technique is able to take under control these assumptions using a suitable calibration curve.