Analysis of Walnut Freshness: Preliminary Study

Kizilay E., Aydınalp C., Akıncı M. N.

10th International Conference on Wireless Networks and Mobile Communications, WINCOM 2023, İstanbul, Turkey, 26 - 28 October 2023 identifier

  • Publication Type: Conference Paper / Full Text
  • Doi Number: 10.1109/wincom59760.2023.10322950
  • City: İstanbul
  • Country: Turkey
  • Keywords: horn antenna, Microwave scattering parameters, RMSE value
  • Istanbul Technical University Affiliated: Yes


With shifting lifestyles, the food industry has adopted fast food as a solution to keep up with the pace of the age. However, as the demand for healthier alternatives grows, snacks enriched with healthy fats such as almonds, pistachio and walnuts have emerged as some of the most favored choices. In this study, three different walnut samples (empty, fresh and rancid) were simulated to investigate the freshness of walnuts. For each sample type, three different sizes were designed to obtain the transmission coefficients (TCs) from pyramidal horn antennas between 6.8-12.4 GHz. The Root Mean Square Error (RMSE) value of between walnut samples (empty-healthy, rancid-healthy and empty-rancid) for the three sample sets was calculated. The results indicate a significant difference in the transmission coefficient (TC) for the fresh walnuts, enabling the assessment of walnut freshness through the inherent microwave properties.