Results 31 to 40 of about 10,181 (286)

Measurement of Complex Permittivity for Rapid Detection of Liquid Concentration Using a Reusable Octagon-Shaped Resonator Sensor

Micromachines, 2023
Substrate-integrated waveguides (SIWs) are widely used in microwave systems owing to their low cost and ease of integration. In this study, an SIW-based resonator that reacts to the complex permittivity variation of solutions with dimensions of 79.2 mm ×
Chun-He Quan, Xiao-Yu Zhang, Jong-Chul Lee   +2 more
doaj   +1 more source

Wireless sensors embedded in high permittivity lossy media

, 2023
The design of wireless sensors for operation embedded in a medium with high losses creates a series of additional constraints that should be taken into consideration at design stage to enhance sensor performance. In such a medium, both the real and the imaginary part of the relative permittivity will have a high value. In this thesis, the effect of the
openaire   +4 more sources

Compact maze-shaped meta resonator for high-sensitive S-band low permittivity characterization

Sensing and Bio-Sensing Research
This paper proposed a compact, high-sensitive S-band microwave sensor for low permittivity characterization. The proposed microwave sensor is inspired by a metamaterials-based maze-shaped split-ring resonator (MS-SRR) configuration, and its overall ...
Abu Hanif, Mohammad Tariqul Islam, Mohammad Lutful Hakim, Touhidul Alam, Haitham Alsaif, Abdulwadoud A. Maash, Mohamed S. Soliman, Md. Shabiul Islam   +7 more
doaj   +1 more source

Numerical Performance Analysis of Terahertz Spectroscopy Using an Ultra-Sensitive Resonance-Based Sensor

Frontiers in Physics, 2020
A terahertz sensor structure is proposed that can sense any variations in analyte permittivity. The sensor essentially works according to the shifts in the resonance frequencies of its propagated spoof surface plasmonic modes.
Sajad Niknam, Mehran Yazdi, Salman Behboudi Amlashi, Mohsen Khalily   +3 more
doaj   +1 more source

Investigation of textile permittivity under the influence of fever for designing a wearable temperature sensing antenna

Biosensors and Bioelectronics: X, 2022
This paper aims to monitor human fever using wearable sensors as a non-invasive and real-time method. Our purpose is based on the use of textile sensors that can be integrated with the person’s clothes.
Sina Rahmani Charvadeh, Javad Ghalibafan
doaj   +1 more source

Microwave Sensors and Their Applications in Permittivity Measurement

Sensors
This paper reviews microwave sensors and their applications in permittivity measurement. The detection, diagnosis, classification, and monitoring without contact and invasion have been the subject of numerous studies based on permittivity characteristics tracking. This review illustrates many new types of research in recent years.
Changjun Liu, Chongwei Liao, Yujie Peng, Weixin Zhang, Bo Wu, Peixiang Yang   +5 more
openaire   +3 more sources

Tapered CSRR-Based Sensor for Relative Permittivity Measurement With Application to Biomedical Microfluidic Sensing

IEEE Access
This paper proposes miniaturized, lightweight and ultrasensitive planar metamaterial sensor for relative permittivity measurement of nondispersive materials.
Salem A. Alotaibi, Yepu Cui, Manos M. Tentzeris   +2 more
doaj   +1 more source

Microstrip sensor and methodology for the determination of complex anisotropic permittivity using perturbation techniques

Scientific Reports, 2022
In this work, a sensor in microstrip technology and a methodology for measuring the real part and the imaginary part of the complex uniaxial permittivity of solid anisotropic samples are presented.
Hector-Noel Morales-Lovera, Jose-Luis Olvera-Cervantes, Aldo-Eleazar Perez-Ramos, Alonso Corona-Chavez, Carlos E. Saavedra   +4 more
doaj   +1 more source

Calibration of capacitive soil moisture sensor based on random forest

地质科技通报, 2023
Objective Soil moisture information crucial for various applications, such as natural ecological restoration, farmland irrigation management, and soil engineering construction.
Zheng Wang, Shun Hu, Rui Ma, Ziyong Sun, Mengyan Ge, Junyou Wang, Shufeng Qiao   +6 more
doaj   +1 more source

Design and testing of a thick-film dual-modality sensor for composition measurements in heterogeneous mixtures

, 2005
The current paper focuses on design and laboratory evaluation of a dual-modality sensor, developed for the needs of oil and gas extraction industry to measure the composition of heterogeneous mixtures in harsh conditions.
Hale, Jack, Meng, Guangtian, Dyakowski, Tom, Jaworski, Artur, White, Neil   +4 more
core   +1 more source