Results 1 to 10 of about 7,659 (159)

Low-Cost and Highly Sensitive Reflective-Mode Phase-Variation Sensor for Bacteria Detection

IEEE Access
This paper presents a reflective-mode planar microwave biosensor based on phase-variation allowing for the detection of low bacteria concentration. The sensor is a one-port coplanar waveguide (CPW) structure implemented by means of a pair of weakly ...
Ilona Piekarz, Jakub Sorocki, Witold Skowronski, Sabina Gorska, Slawomir Gruszczynski, Krzysztof Wincza, Pau Casacuberta, Paris Velez, Ferran Martin   +8 more
doaj   +4 more sources

A Reflective-Mode Phase-Variation Displacement Sensor

IEEE Access, 2020
In this paper, a displacement sensor based on an open-ended step-impedance transmission line is reported. The sensor operates in reflection, and the output variable is the phase of the reflection coefficient.
Jonathan Munoz-Enano, Paris Velez, Lijuan Su, Marta Gil-Barba, Ferran Martin   +4 more
doaj   +4 more sources

Reflective-Mode Phase-Variation Submersible Sensor for Liquid Characterization

IEEE Transactions on Instrumentation and Measurement, 2023
A one-port reflective-mode microwave submersible sensor based on an open-ended step-impedance microstrip line configuration, operating at a single frequency, useful for the dielectric characterization of liquids and the measurement of liquid composition in binary mixtures, is proposed in this article.
Lijuan Su, Paris Velez, Pau Casacuberta   +2 more
exaly   +4 more sources

Highly Sensitive Reflective-Mode Phase-Variation Permittivity Sensor Based on a Coplanar Waveguide Terminated With an Open Complementary Split Ring Resonator (OCSRR)

IEEE Access, 2021
This paper presents a one-port reflective-mode phase-variation microwave sensor consisting of a coplanar waveguide (CPW) transmission line terminated with a grounded open complementary split ring resonator (OCSRR).
Lijuan Su, Jonathan Munoz-Enano, Paris Velez, Marta Gil-Barba, Pau Casacuberta, Ferran Martin   +5 more
doaj   +3 more sources

Highly Sensitive Reflective-Mode Defect Detectors and Dielectric Constant Sensors Based on Open-Ended Stepped-Impedance Transmission Lines [PDF]

Sensors, 2020
In this paper, reflective-mode phase-variation sensors based on open-ended stepped-impedance transmission lines with optimized sensitivity for their use as defect detectors and dielectric constant sensors are reported.
Pau Casacuberta, Jonathan Muñoz-Enano, Paris Vélez, Lijuan Su, Marta Gil, Ferran Martín   +5 more
doaj   +6 more sources

A Discussion on Sensitivity Optimization in Reflective-Mode Phase-Variation Permittivity Sensors Based on Semi-Lumped Resonators

Sensors
Typically, the operating frequency in single-frequency reflective-mode phase-variation permittivity sensors based on semi-lumped resonators (e.g., step-impedance resonators—SIRs) is set to the resonance frequency of the sensing resonator when it is ...
Lijuan Su, Paris Vélez, Pau Casacuberta, Xavier Canalias, Nazmia Kurniawati, Ferran Martín   +5 more
doaj   +4 more sources

NonInvasive Glucose Fiber Sensor Based on Self-Imaging Technique: Proof of Concept [PDF]

EPJ Web of Conferences, 2023
This paper proposes a proof of concept for a reflective fiber optic sensor based on multimode interference, designed to measure glucose concentrations in aqueous solutions that mimic the range of glucose concentrations found in human saliva.
Cunha Cristina, Silva Susana, Frazão Orlando, Novais Susana   +3 more
doaj   +1 more source

Numerical Modelling of a Distributed Acoustic Sensor Based on Ultra-Low Loss-Enhanced Backscattering Fibers

Sensors, 2021
In this study, a distributed acoustic sensor (DAS) was numerically modeled based on the non-ideal optical components with their noises and imperfections.
Lieke Dorine van Putten, Ali Masoudi, James Snook, Gilberto Brambilla   +3 more
doaj   +1 more source

High-Order Harmonic Film Bulk Acoustic Resonator Based on a Polymer Reflector

Sensors, 2022
A film bulk acoustic resonator (FBAR), based on a polymer air cavity, is presented. The polymer reflective layer on the polymer air cavity can serve both as the reflective layer and the function layer for inducing the high-order mode resonance.
Yuxuan Hu, Bo Dong, Liang Lei, Zhizhong Wang, Shuangchen Ruan   +4 more
doaj   +1 more source

Improving Temperature-Sensing Performance of Photonic Crystal Fiber via External Metal-Coated Trapezoidal-Shaped Surface

Crystals, 2023
This article describes a photonic crystal fiber (PCF) temperature sensor that utilizes a flat, metal-coated trapezoidal surface. The PCF is made up of two layers of elliptical air holes and a polished trapezoidal surface that allows temperature sensing ...
Chung-Ting Chou Chao, Sy-Hann Chen, Hung Ji Huang, Muhammad Raziq Rahimi Kooh, Chee Ming Lim, Roshan Thotagamuge, Abdul Hanif Mahadi, Yuan-Fong Chou Chau   +7 more
doaj   +1 more source