Results 11 to 20 of about 36,597 (305)

Reflective Bistable Chiral Splay Nematic Liquid Crystal for Low-Power Heat Sensor

Sensors, 2020
The memory effect of the bistable liquid crystal mode is able to maintain the display information for a long time. The splay state and π twist states are used as the memory states of the bistable chiral splay nematic (BCSN) mode. The transition time from
Chao Ping Chen, Chul Gyu Jhun
doaj   +1 more source

Highly Sensitive Reflective-Mode Phase-Variation Permittivity Sensors Using Coupled Line Sections

IEEE Transactions on Microwave Theory and Techniques, 2023
Highly sensitive permittivity sensors operating in reflection and exploiting phase variation are presented in this article. The sensors are one-port structures implemented by means of a pair of coupled lines, the sensitive region, with an appropriate termination.
Pau Casacuberta, Paris Vélez, Jonathan Muñoz-Enano, Lijuan Su, Ferran Martín   +4 more
openaire   +3 more sources

Circuit Analysis of a Coplanar Waveguide (CPW) Terminated With a Step-Impedance Resonator (SIR) for Highly Sensitive One-Port Permittivity Sensing

IEEE Access, 2022
This paper presents a single-frequency reflective-mode phase-variation microwave sensor devoted to the dielectric characterization of materials. The device is implemented in coplanar waveguide (CPW) technology and consists of two parts: (i) the sensing ...
Pau Casacuberta, Paris Velez, Jonathan Munoz-Enano, Lijuan Su, Marta Gil Barba, Amir Ebrahimi, Ferran Martin   +6 more
doaj   +1 more source

Simultaneous Resolution and Dynamic Range Improvement in Microwave Phase-Variation Displacement Sensors [PDF]

فصلنامه علوم و فناوری فضایی
: In this paper, a reflective-mode phase-variation microwave moderate range displacement sensor is proposed. It consists of a reader which is a one-port microstrip line terminated with a matched load, and a movable resonator (etched in an independent ...
Amirhossein Karami Horestani, Ferran Paredes, Ferran Martín   +2 more
doaj   +1 more source

A Few Mode Fiber Temperature Sensor Filled With PDMS Based on Vernier Effect

IEEE Photonics Journal, 2021
A few mode fiber temperature sensor filled with PDMS based on vernier effect is proposed. It uses single mode fiber (SMF), few mode fiber (FMF), and polydimethylsiloxane (PDMS) to form the SMF-air microcavity-FMF-PDMS-FMF structure.
Xinghu Fu, Ran Ran, Qiannan Li, Zhexu Huang, Dongshu Li, Rongjing Zhang, Guangwei Fu, Wa Jin, Yuefeng Qi, Weihong Bi   +9 more
doaj   +1 more source

Reflective Properties of a Polymer Micro-Transducer for an Optical Fiber Refractive Index Sensor

Sensors, 2020
A polymer microtip manufactured at the end of a multi-mode optical fiber by using the photopolymerization process offers good reflective properties, therefore, it is applicable as an optical fiber sensor micro-transducer.
Paweł Marć, Monika Żuchowska, Leszek R. Jaroszewicz   +2 more
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A BIOSENSOR USING COUPLED PLASMON WAVEGUIDE RESONANCE COMBINED WITH HYPERSPECTRAL FLUORESCENCE ANALYSIS [PDF]

Journal of Innovative Optical Health Sciences, 2014
We developed a biosensor that is capable for simultaneous surface plasmon resonance (SPR) sensing and hyperspectral fluorescence analysis in this paper.
CHAN DU, LE LIU, JUN GUO, YONGHONG HE, JIHUA GUO, SHUQING SUN, HUI MA   +6 more
doaj   +1 more source

Core Mode-Cladding Supermode Modal Interferometer and High-Temperature Sensing Application Based on All-Solid Photonic Bandgap Fiber

IEEE Photonics Journal, 2014
A core-mode-cladding-supermode modal interferometer with all-solid photonic bandgap fiber (AS-PBF) is constructed, and a reflective Michelson-type high-temperature sensor is fabricated.
X. L. Tan, Y. F. Geng, X. J. Li, Y. Q. Yu, Y. L. Deng, Z. Yin, R. Gao   +6 more
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A sensor for stiffness change sensing based on three weakly coupled resonators with enhanced sensitivity [PDF]

, 2015
This paper reports on a novel MEMS resonant sensing device consisting of three weakly coupled resonators that can achieve an order of magnitude improvement in sensitivity to stiffness change, compared to current state-of-the-art resonator sensors with ...
Chun Zhao, Zhao, C, Honglong Chang, Xie, Jianbing, Xie, J, Chang, H, Pu, SH, Kraft, M, Kraft, Michael, Chang, Honglong, Pu, Suan-Hui, Michael Kraft, ,, Graham S. Wood, Suan Hui Pu, Zhao, Chun, Wood, GS, Jianbing Xie, Wood, Graham S., Chong, HMH, Chong, Harold M.H., Harold M. H. Chong   +21 more
core   +1 more source

Reflectance pulse oximetry: Practical issues and limitations

ICT Express, 2016
The demand for reflective-mode pulse oximetry to monitor oxygen saturation has been continuously increasing because it can be used at diverse measurement sites such as the feet, forehead, chest, and wrists.
Hooseok Lee, Hoon Ko, Jinseok Lee
doaj   +1 more source