Publications
Complete list of research publications in microwave sensors and phase-variation permittivity measurement
2025
Engineering with loss to enhance sensitivity in microwave sensors
IEEE Microwave Magazine , Vol. 26 , Issue 5 , pp. 52-66
Authors: Pau Casacuberta, Paris Vélez, Lijuan Su, Xavier Canalias, Ferran Martín
This paper explores engineering approaches that utilize loss mechanisms to enhance sensitivity in microwave sensors, providing new insights into sensor optimization....
AI-Driven Battery-Free Wireless Sensing of Hazardous Liquid Spills via a Frequency-Selective Surface in a Monostatic Antenna Configuration
IEEE Microwave and Wireless Technology Letters
Authors: Pau Casacuberta, Fatemeh Niknahad, Ali Maleki Gargari, Ferran Martín, Mohammad H. Zarifi
This paper presents an AI-driven battery-free wireless sensor system for detecting hazardous liquid spills using frequency-selective surfaces in a monostatic antenna configuration....
2024
Highly sensitive lossy tunable permittivity sensor
IEEE Microwave and Wireless Technology Letters
Authors: Pau Casacuberta, Paris Vélez, Lijuan Su, Xavier Canalias, Ferran Martín
This work presents a highly sensitive lossy tunable permittivity sensor for enhanced material characterization with tunable sensing capabilities....
Reflective-Mode Permittivity Sensors Based on Distributed and Semi-Lumped Coupled Resonators
Coupled Structures for Microwave Sensing , pp. 243-281
Authors: Pau Casacuberta, Paris Vélez, Jonathan Muñoz-Enano, Lijuan Su, Ferran Martín
This book chapter presents reflective-mode permittivity sensors based on distributed and semi-lumped coupled resonators for microwave sensing applications....
Sensitivity optimization in single-frequency planar microwave sensors for solid and liquid characterization and microfluidics
IEEE Transactions on Microwave Theory and Techniques
Authors: Pau Casacuberta, Amir Ebrahimi, Paris Vélez, Lijuan Su, Xavier Canalias, Kamran Ghorbani, Ferran Martín
This paper presents sensitivity optimization techniques for single-frequency planar microwave sensors designed for solid and liquid characterization and microfluidic applications....
Sensitive microfluidic sensor with weakly coupled dumbbell defect-ground-structure resonators for volume fraction determination in liquid mixtures
IEEE Microwave and Wireless Technology Letters
Authors: Pau Casacuberta, Paris Vélez, Lijuan Su, Xavier Canalias, Ferran Martín
This work presents a sensitive microfluidic sensor with weakly coupled dumbbell defect-ground-structure resonators for volume fraction determination in liquid mixtures....
2023
Highly sensitive reflective-mode phase-variation permittivity sensors using coupled line sections
IEEE Transactions on Microwave Theory and Techniques , Vol. 71 , Issue 7 , pp. 2970-2984
Authors: Pau Casacuberta, Paris Vélez, Jonathan Muñoz-Enano, Lijuan Su, Ferran Martín
This work presents highly sensitive reflective-mode phase-variation permittivity sensors using coupled line sections for enhanced material characterization....
Losses assisted sensitivity enhancement in reflective-mode phase-variation permittivity sensors based on weakly coupled distributed resonators
IEEE Sensors Letters , Vol. 7 , Issue 8 , pp. 1-4
Authors: Pau Casacuberta, Paris Vélez, Jonathan Muñoz-Enano, Lijuan Su, Ferran Martín
This work presents losses assisted sensitivity enhancement in reflective-mode phase-variation permittivity sensors based on weakly coupled distributed resonators....
Highly sensitive phase-variation microwave sensor for measuring the thickness of dielectric films on metals with micrometer-scale resolution
2023 IEEE/MTT-S International Microwave Symposium-IMS 2023 , pp. 959-962
Authors: Pau Casacuberta, Paris Vélez, Lijuan Su, Jonathan Muñoz-Enano, Ferran Martín
This work presents a highly sensitive phase-variation microwave sensor for measuring the thickness of dielectric films on metals with micrometer-scale resolution....
Highly sensitive coplanar waveguide (CPW) reflective-mode phase-variation permittivity sensors based on weakly coupled step-impedance resonators (SIRs)
IEEE Transactions on Microwave Theory and Techniques , Vol. 72 , Issue 3 , pp. 1739-1753
Authors: Pau Casacuberta, Paris Vélez, Jonathan Muñoz-Enano, Lijuan Su, Ferran Martín
This work presents highly sensitive CPW reflective-mode phase-variation permittivity sensors based on weakly coupled step-impedance resonators....
Highly-Sensitive Microwave Phase-Variation Permittivity Sensors
2023 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) , pp. 31-33
Authors: Pau Casacuberta, Paris Vélez, Jonathan Muñoz-Enano, Lijuan Su, Xavier Canalías, Ferran Martín
This work presents highly-sensitive microwave phase-variation permittivity sensors for enhanced material characterization....
2022
Circuit analysis of a coplanar waveguide (CPW) terminated with a step-impedance resonator (SIR) for highly sensitive one-port permittivity sensing
IEEE Access , Vol. 10 , pp. 62597-62612
Authors: Pau Casacuberta, Paris Vélez, Jonathan Muñoz-Enano, Lijuan Su, Marta Gil Barba, Amir Ebrahimi, Ferran Martín
This paper presents a comprehensive circuit analysis of a coplanar waveguide terminated with a step-impedance resonator for highly sensitive one-port permittivity sensing applications....
Reflective-mode phase-variation permittivity sensors based on coupled resonators
2022 IEEE Sensors , pp. 1-4
Authors: Pau Casacuberta, Paris Vélez, Jonathan Muñoz-Enano, Lijuan Su, Marta Gil, Ferran Martín
This work presents reflective-mode phase-variation permittivity sensors based on coupled resonators for enhanced material characterization capabilities....
2020
Highly sensitive reflective-mode defect detectors and dielectric constant sensors based on open-ended stepped-impedance transmission lines
Sensors , Vol. 20 , Issue 21 , pp. 6236
Authors: Pau Casacuberta, Jonathan Muñoz-Enano, Paris Vélez, Lijuan Su, Marta Gil, Ferran Martín
This work presents highly sensitive reflective-mode defect detectors and dielectric constant sensors based on open-ended stepped-impedance transmission lines for material characterization applications...