Quemada Mayoral, CarlosGarcía González, CebriánIriarte Galarregui, Juan CarlosMarín Ederra, DianaGastón Beraza, DiegoMiranda Jiménez, CarlosGonzalo García, RamónMaestrojuán Biurrun, ItziarSantesteban García, GonzagaEderra Urzainqui, Íñigo2019-09-042020-03-192019C. Q. Mayoral et al., "Water Content Continuous Monitoring of Grapevine Xylem Tissue Using a Portable Low-Power Cost-Effective FMCW Radar," in IEEE Transactions on Geoscience and Remote Sensing, vol. 57, no. 8, pp. 5595-5605, Aug. 2019. doi: 10.1109/TGRS.2019.29005650196-289210.1109/TGRS.2019.2900565https://academica-e.unavarra.es/handle/2454/34729This paper presents the real-time monitoring of a grapevine’s water content that flows up through the xylem tissue by means of a frequency-modulated continuous-wave (FMCW) radar. The application of an optimization process, based on the super-resolution multiple signal classification (MUSIC) algorithm, has enabled the reduction of the bandwidth required to discern the xylem water content, and thus the operating frequency, achieving a depth resolution of at least 3 mm. This design advantage has resulted in a significant step forward towards a real life application, allowing the use of fully-integrated off-the-shelf components in order to implement a completely portable low-power cost-effective radar at 23.1 GHz with a 3.4 GHz bandwidth. The sensor performance has been evaluated by means of three different experiments: irrigation cycles, day/night cycles and comparison between irrigation cycles at different temperatures. From the experimental results, it is possible to assert that the contactless sensor presented in this work is very sensitive to changes in the plant’s water content, differentiating between daytime and nighttime. In addition, it has been proved that temperature has a noticeable influence over the evapotranspiration, observing negative drying slopes of 5.62 mV/cycle and 6.28 mV/cycle at 23ºC and 26ºC respectively.11 p.application/pdfeng© 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other work.SensorDielectric permittivityMultiple signal classification (MUSIC) algorithmXylem water content.Frequency-modulated continuous-wave (FMCW) radarinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccess