Results 31 to 40 of about 72,738 (296)
Simple non-invasive measurement of complex permittivity
Electronics Letters, 1993 A simple non-invasive sensor measures complex permittivity at microwave (UHF) frequencies from changes in resonance frequency and reflection coefficient. Response to reference liquids is in good agreement with finite difference time-domain calculation.
Johnson, RB +4 more
openaire +2 more sources
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
A study on the transferable skills of the engineering students at Universiti Tun Hussein Onn Malaysia [PDF]
, 2017 The purpose of this study was to identify the students' levels of awareness of the importance of transferable skills and the mastery of the aspects of adaptive, critical thinking, and problem-solving.
Abd Baser, Jamil +3 more
core +3 more sources
THE MEASUREMENT CELL BASED ON THE QUARTZ QUAZIOPTICAL RESONATOR FOR RESEARCH ON DIELECTRIC LIQUIDS IN THE SUB-THZ RANGE [PDF]
Радиофизика и электроника, 2016 Using WGM resonators allow achieving high accuracy in determining the substances permittivities due to the high Q-factor. The resonator with a microfluidic channel is promising for the study of small-volume liquids, which is especially important for ...
A. A. Barannik +4 more
doaj +1 more source
Energy Reports, 2022 The degradation of insulating materials has been recognized as a prime cause of the precocious failure of cable systems. In this research, the role of simultaneous thermal and mechanical stresses on the insulation integrity of cross-linked polyolefin ...
Ramy S.A. Afia +2 more
doaj +1 more source
Broadband measurement of high permittivity at millimetre‐wave frequencies
Electronics Letters, 2016 In this Letter, a method for the broadband measurement of complex permittivity using a quasi‐optical technique is presented. After calibration of the quasi‐optical system, the material under test is inserted into the system and S‐parameters are measured ...
Y.‐P. Hong, M.J. Salter, D.‐J. Lee
doaj +1 more source
Precise measurement of complex permittivity of materials for telecommunications devices
Journal of Telecommunications and Information Technology, 2001 In order to obtain precise complex permittivity of the dielectric materials obtained from the perturbation method a correction curve is made using the electromagnetic field simulator which applies transmission line modeling (TLM) method.
Takayuki Nakamura, Yoshio Nikawa
doaj +1 more source
Complex Permittivity Measurements of Film-Type Materials: Effect of the Waveguide Flange
IEEE AccessThe flexibility and thinness of most film-type materials make it difficult to use conventional measurement methods such as those in international or organizational standards to accurately measure the complex permittivity of these materials.
Han-Hee Lee +2 more
doaj +1 more source
Using GPS to measure ground complex permittivity
Electronics Letters, 1998 In personal satellite communications, ground specular reflection may be received along with the direct signal. To characterise this effect at L-band, fade measurements were taken over grass and asphalt surfaces using a GPS receiver. By matching experimental results to a simulation, ground electrical characteristics were derived, showing a novel method ...
Vogel, WJ, Kavak, ADNAN, Xu, GH
openaire +2 more sources
Strongly Enhanced Sensitivity in Planar Microwave Sensors Based on Metamaterial coupling
, 2017 Limited sensitivity and sensing range are arguably the greatest challenges in microwave sensor design. Recent attempts to improve these properties have relied on metamaterial- (MTM-) inspired open-loop resonators (OLRs) coupled to transmission lines (TLs)
Abdolrazzaghi, Mohammad +2 more
core +1 more source