Characterization of the Dielectric Properties of the Tommy Atkins Mango

Abstract This paper presents the characterization of dielectric properties (dielectric permittivity and dielectric loss factor) of Tommy Atkins mango (Mangifera indica L), a fruit produced in several regions of Brazil, of great economic importance. The fruits were characterized according to their maturation index, by probe method, and identified by the yellowish tone in their bark. The results allowed correlating the dielectric characteristics of the fruit with the physicochemical transformations that occurred in the maturation process of the mango Tommy. It was also verified a greater variation in the frequencies below 1 GHz, with the maturation indicated by the dielectric signature on the fifth day after the harvest. From these results, we can observe the use of electromagnetic materials and techniques in the solution and optimization of processes in agriculture can improve the quality of products consumed or suggesting best practices to the productive sector.

摘要 本文针对巴西多产区种植、经济价值突出的汤米·阿特金斯芒果（Tommy Atkins mango，学名*Mangifera indica* L.）的介电特性——介电常数（dielectric permittivity）与介电损耗因子（dielectric loss factor）——开展表征研究。实验基于成熟度指标、采用探针法对芒果样本进行表征，并以果皮泛黄作为成熟度判定标准。研究结果将该芒果的介电特性与其成熟过程中发生的物理化学变化建立了关联；同时证实，在1 GHz以下的频率区间内介电特性变化更为显著，且可在收获后第5天通过介电特征（dielectric signature）判定其成熟度。基于上述研究结果可见，将电磁材料与技术应用于农业生产流程的问题解决与工艺优化，既可提升终端消费品的品质，也可为农业生产部门提供标准化的最优实践方案。