Sensitivity variation as a function of frequency of a permittivity composite-sensor used to measure the moisture content of organic products

José Roberto Reyes Ayona; Andres Toledo Lopez; Juan Manuel Sierra-Hernández; Roberto Rojas-Laguna

doi:10.1117/12.2529701

5 September 2019 Sensitivity variation as a function of frequency of a permittivity composite-sensor used to measure the moisture content of organic products

José Roberto Reyes Ayona, Andres Toledo Lopez, Juan Manuel Sierra-Hernández, Roberto Rojas-Laguna

Author Affiliations +

Proceedings Volume 11080, Metamaterials, Metadevices, and Metasystems 2019; 110801R (2019) https://doi.org/10.1117/12.2529701
Event: SPIE Nanoscience + Engineering, 2019, San Diego, California, United States

Abstract

Using a forced-mode composite right/left-handed resonator, we designed and proved a permittivity sensor at the microwave regime. We use this sensor to measure humidity percent of honey and potatoes. The sensor resonant frequency can be modified without altering its physical length. With this characteristic a bigger frequency bandwidth can be covered. In addition to that, the second and third mode can also be used for measuring increasing even more the sensor frequency bandwidth. It can be clearly appreciated that one mode is magnetic and the other electric. Not only they differ in their amplitude but also in their quality factor. By moving the position that forces the modes, the first mode frequency value will increase while the second one will decrease. This will happen until the modes meet each other and then they will exchange places.

Citation Download Citation

José Roberto Reyes Ayona, Andres Toledo Lopez, Juan Manuel Sierra-Hernández, and Roberto Rojas-Laguna "Sensitivity variation as a function of frequency of a permittivity composite-sensor used to measure the moisture content of organic products", Proc. SPIE 11080, Metamaterials, Metadevices, and Metasystems 2019, 110801R (5 September 2019); https://doi.org/10.1117/12.2529701

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