Microwave Sensors and Their Applications in Permittivity Measurement [PDF]
SensorsThis 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
Changjun Liu +5 more
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Design of a Microwave Heating and Permittivity Measurement System Based on Oblique Aperture Ridge Waveguide [PDF]
Sensors, 2023 In this paper, an oblique aperture ridge waveguide operating at 2450 MHz is proposed, and, using the ridge waveguide, a permittivity measurement system is constructed which can measure the permittivity of materials during microwave heating.
Mingyi Gou +4 more
doaj +2 more sources
Non-resonant Permittivity Measurement Methods [PDF]
Journal of Microwaves, Optoelectronics and Electromagnetic Applications, 2017 The measurement of the dielectric properties of materials has been applied in non-destructive tests, humidity measurement, soil analysis and even cancer detection.
Sergio L. S. Severo +3 more
doaj +4 more sources
Meander-Line Slot-Loaded High-Sensitivity Microstrip Patch Sensor Antenna for Relative Permittivity Measurement [PDF]
Sensors, 2019 A high-sensitivity microstrip patch sensor antenna (MPSA) loaded with a meander-line slot (MLS) is proposed for the measurement of relative permittivity. The proposed MPSA was designed by etching the MLS along the radiating edge of the patch antenna, and
Junho Yeo, Jong-Ig Lee
doaj +2 more sources
An Overmoded-Waveguide-Based Permittivity Measurement Method with High Accuracy and Ultra-Broadband over 8–110 GHz [PDF]
MicromachinesAn overmoded-waveguide-based kit operating in 8–110 GHz for material complex permittivity measurement is proposed and designed in this paper. It overcomes the significant errors caused by air gaps in the conventional standard waveguide method (SWM ...
Weijie Wang +8 more
doaj +2 more sources
A High-Sensitivity Microfluidic Sensor Based on a Substrate Integrated Waveguide Re-Entrant Cavity for Complex Permittivity Measurement of Liquids [PDF]
Sensors, 2018 exaly +2 more sources
New Measurement Technique for Complex Permittivity in Millimeter-Wave Band Using Simple Rectangular Waveguide Adapters [PDF]
Journal of Electromagnetic Engineering and Science, 2022 This research presents a novel methodology for measuring the complex permittivity of a material under test (MUT) in a millimeter-wave (mmWave) band by using two rectangular waveguide adapters. Contrary to the conventional Nicolson-Ross-Weir (NRW) method,
Min-Seok Park +4 more
doaj +1 more source
Remote Sensing, 2023 Ground-penetrating radar (GPR) has been widely used in estimating the permittivity of mediums. The radar echo amplitude method is an important method used by GPR in this estimation, the basic step of which is to deduce the magnitude of the permittivity ...
Xu Li +5 more
doaj +1 more source
Dielectric Measurement of Agricultural Grain Moisture—Theory and Applications
Sensors, 2022 Moisture content is a critical variable for the harvesting, processing, storing and marketing of cereal grains, oilseeds and legumes. Efficient and accurate determination of grain moisture content even with advanced nondestructive techniques, remains a ...
Scott B. Jones, Wenyi Sheng, Dani Or
doaj +1 more source
Broadband Measurements of Soil Complex Permittivity
Sensors, 2023 Agriculture is a major consumer of freshwater and is often associated with low water productivity. To prevent drought, farmers tend to over-irrigate, putting a strain on the ever-depleting groundwater resources. To improve modern agricultural techniques and conserve water, quick and accurate estimates of soil water content (SWC) should be made, and ...
Justin Stellini +7 more
openaire +4 more sources