Results 21 to 30 of about 36,518 (183)
A New Planar Microwave Sensor for Building Materials Complex Permittivity Characterization
Sensors, 2020 A new microwave sensor is proposed to characterize the complex relative permittivity of building non-magnetic materials and used in the characterization of three concrete samples.
João G. D. Oliveira +4 more
doaj +1 more source
Relative Permittivity Measurement of Microliter Volume Liquid Samples through Microwave Filters
Sensors, 2023 This paper proposes a concept of dielectric characterization of low-volume liquid samples using the coupling coefficient of filters. The concept is validated through a two-pole substrate integrated waveguide filter in which the liquid under test is ...
Azhar Yasin +5 more
doaj +1 more source
Scientific Reports, 2022 In this paper, an Asymmetric Electric Split-Ring Resonator (AESRR) metamaterial structure is proposed to explore the interaction between metamaterials and electromagnetic waves with the influence of Fano resonance on electromagnetic properties.
Yunhao Cao +3 more
doaj +1 more source
Calculation of soil water content using dielectric-permittivity-based sensors – benefits of soil-specific calibration [PDF]
Geoscientific Instrumentation, Methods and Data Systems, 2023 Soil water content (SWC) sensors are widely used for scientific studies or for the management of agricultural practices. The most common sensing techniques provide an estimate of volumetric soil water content based on sensing of dielectric permittivity ...
B. M. Zawilski +5 more
doaj +1 more source
Sensors, 2023 Glycerin is a versatile organic molecule widely used in the pharmaceutical, food, and cosmetic industries, but it also has a central role in biodiesel refining.
Miguel Monteagudo Honrubia +3 more
doaj +1 more source
On the sensitivity of generic porous optical sensors [PDF]
, 2012 A porous material was considered as a platform for optical sensing. It was envisaged that the porous material was infiltrated by a fluid which contains an agent to be sensed.
Abdulhalim +38 more
core +2 more sources
An Inkjet Printed Chipless RFID Sensor for Wireless Humidity Monitoring [PDF]
, 2017 A novel chipless RFID humidity sensor based on a finite Artificial Impedance Surface (AIS) is presented. The unit cell of the AIS is composed of three concentric loops thus obtaining three deep and high Q nulls in the electromagnetic response of the tag.
Borgese, Michele +4 more
core +2 more sources
Chemosensors, 2021 We describe a highly sensitive quartz sensor for measuring changes in the relative permittivity of liquids flowing in microchannels. The proposed method uses a highly stable oscillator and capacitance-dependent quartz crystal together with a capacitance ...
Vojko Matko, Miro Milanovič
doaj +1 more source
A computational model for path loss in wireless sensor networks in orchard environments. [PDF]
, 2014 A computational model for radio wave propagation through tree orchards is presented. Trees are modeled as collections of branches, geometrically approximated by cylinders, whose dimensions are determined on the basis of measurements in a cherry orchard ...
Anastassiu, Hristos T +6 more
core +3 more sources
Complementary Metamaterial Sensor for Nondestructive Evaluation of Dielectric Substrates
Sensors, 2019 In this paper, complementary metamaterial sensor is designed for nondestructive evaluation of dielectric substrates. The design concept is based on electromagnetic stored energy in the complementary circular spiral resonator (CCSR), which is concentrated
Tanveer ul Haq +3 more
doaj +1 more source