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Item type:Publication, Access status: without files , An inline fuel mixture monitoring system based on microwave permittivity measurements(IEEE, 2026-04-07); ; ; ; The maritime industry faces significant pressure to reduce CO2 emissions by up to 80% by 2050, as mandated by the “FuelEU Maritime” initiative of the European Union. Blending conventional fossil fuels with renewable drop-in fuels, such as hydrotreated vegetable oils (HVO), offers a viable medium-term solution. This letter presents a sensor system based on four cylindrical cavity resonators to monitor these mixing processes in real-time. By measuring the relative permittivity and applying an extended Clausius-Mossotti model, the system determines the mixing ratio within the fuel circulation loop of a marine engine. Experimental validation using a reduced-scale setup demonstrates a high accuracy with a maximum deviation of 4.5% compared to flow-rate sensors. The system effectively detects supply blockages, thereby providing a robust solution for ensuring compliance for possible regulations in maritime fuel systems.Publicationtype: Journal Article46 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , Effective permittivity determination procedure for 3D-printed dielectric lensesThis work extends the usual design process of dielectric lenses by introducing a novel procedure for determining the effective permittivity of 3D-printed dielectric lenses. A determination lens with a significant side lobe characteristic is designed to determine the effective permittivity while accounting for the specific influences of the 3D-printing process. By using the obtained permittivity value, the lens design can be optimized to achieve a desired performance. A gain accuracy of 0.15 dBi and an SLL accuracy of less than 2.2 dBi is achieved. This procedure integrates seamlessly into the dielectric lens development process, enhancing its accuracy and reliability.Publicationtype: Conference Paper51 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , Effective permittivity determination procedure for 3D-printed dielectric lensesThis work extends the usual design process of dielectric lenses by introducing a novel procedure for determining the effective permittivity of 3D-printed dielectric lenses. A determination lens with a significant side lobe characteristic is designed to determine the effective permittivity while accounting for the specific influences of the 3D-printing process. By using the obtained permittivity value, the lens design can be optimized to achieve a desired performance. A gain accuracy of 0.15 dBi and an SLL accuracy of less than 2.2 dBi is achieved. This procedure integrates seamlessly into the dielectric lens development process, enhancing its accuracy and reliability.Publicationtype: Conference Paper24