scholarly journals A Review of Sensing Strategies for Microwave Sensors Based on Metamaterial-Inspired Resonators: Dielectric Characterization, Displacement, and Angular Velocity Measurements for Health Diagnosis, Telecommunication, and Space Applications

2017 ◽  
Vol 2017 ◽  
pp. 1-13 ◽  
Author(s):  
Lijuan Su ◽  
Javier Mata-Contreras ◽  
Paris Vélez ◽  
Ferran Martín
Keyword(s):  
Transmission Lines ◽  
Harmonic Signal ◽  
Dielectric Materials ◽  
Frequency Variation ◽  
Space Applications ◽  
Dielectric Characterization ◽  
Communication Circuits ◽  
Symmetry Properties ◽  
Microwave Sensors

Four sensing approaches for the implementation of microwave sensors based on transmission lines loaded with metamaterial-inspired resonators are considered in this review paper, and examples of applications are pointed out. In all the cases, sensing is based on the effects that the magnitude under measurement causes in the transmission properties of the resonator-loaded line. Such four strategies are (i) resonance frequency variation, (ii) coupling modulation through symmetry disruption (causing variation of the notch depth), (iii) frequency splitting (also exploiting symmetry properties), and (iv) amplitude modulation of a harmonic signal. Such sensors are useful in various scenarios, of interest in fields as diverse as characterization of dielectric materials for communication circuits, medical diagnosis and treatment with microwave technologies, and sensors for space applications, among others.

Dielectric Characterization of Polyceram Films

1990 ◽  
Vol 180 ◽  
Author(s):  
G. Teowee ◽  
J.M. Boulton ◽  
H.H. Fox ◽  
A. Koussa ◽  
T. Gudgel ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Polyethylene Oxide ◽  
Dielectric Materials ◽  
Inorganic Materials ◽  
Functionalized Polymers ◽  
Multifunctional Materials ◽  
Dielectric Characterization ◽  
Silicon Alkoxides ◽  
Tan Δ

ABSTRACTPolycerams are an emergent class of hybrid, multifunctional materials which combine the properties of organic and inorganic materials. Films have been prepared from silicon alkoxides and reactive, functionalized polymers such as triethoxysilyl modified polybutadiene (MPBD), (N-triethoxysilylpropyl)O polyethylene oxide urethane (MPEOU) and trimethoxysilylpropyl substituted polyethyleneimine (MPEI). Characterization of dielectric constant and tan δ of the films has been carried out over a range of frequency from 500 Hz to 100 kHz; and the results are used to consider the potential of Polycerams as dielectric materials.

scholarly journals Multipactor Effect Characterization of Dielectric Materials for Space Applications

2018 ◽  
Vol 66 (8) ◽  
pp. 3644-3655 ◽  
Author(s):  
J. Vague ◽  
J. C. Melgarejo ◽  
M. Guglielmi ◽  
Vicente E. Boria ◽  
S. Anza ◽  
...  
Keyword(s):  
Dielectric Materials ◽  
Space Applications

scholarly journals Differential microwave sensor based on microstrip lines loaded with a split-ring resonator for dielectric characterization of materials

2021 ◽  
Vol 2118 (1) ◽  
pp. 012004
Author(s):  
J Zapata-Londoño ◽  
F Umaña-Idárraga ◽  
J Morales-Guerra ◽  
S Arias-Gómez ◽  
C Valencia-Balvin ◽  
...  
Keyword(s):  
Ring Resonator ◽  
High Sensitivity ◽  
Dielectric Materials ◽  
Split Ring Resonator ◽  
Label Free ◽  
Split Ring ◽  
Total Size ◽  
Dielectric Characterization ◽  
Microwave Sensor

Abstract In this work, we propose a microwave sensor that allows the characterization of dielectric materials based on a differential configuration. A microstrip permittivity sensor of the surrounding material is proposed using a split ring-resonator to measure differentially. The geometry was optimized and was numerically analyzed using CST STUDIO. The numerical analysis of the metamaterial unit cells is carried out first, to determine the operating band. After that, the metamaterial cell was employed to design the differential microstrip permittivity sensor. The obtained results reveal that the proposed sensor has the capability to characterize different materials whose relative dielectric permittivity’s are in the range of 9.8 to 80 with great performance. The device has a total size of 86 mm × 60 mm and operates around 3 GHz. In this band, the sensor reaches a sensibility of 2.89 MHz and a Q-factor of 70.15. Thus, this work shows a compact, reusable, label-free, and non-destructive microwave sensing device and paves the way for high accuracy sensing of the dielectric properties of different materials due to its high- Q-factor as well as high sensitivity.

Characterization of transmission lines with nonlinear dielectric materials

2017 ◽  
Author(s):  
Aaron M. Hagerstrom ◽  
Eric Marksz ◽  
Christian J. Long ◽  
James C. Booth ◽  
Nathan D. Orloff
Keyword(s):  
Transmission Lines ◽  
Dielectric Materials ◽  
Nonlinear Dielectric

scholarly journals Planar Microwave Resonant Sensors: A Review and Recent Developments

2020 ◽  
Vol 10 (7) ◽  
pp. 2615 ◽  
Author(s):  
Jonathan Muñoz-Enano ◽  
Paris Vélez ◽  
Marta Gil ◽  
Ferran Martín
Keyword(s):  
Surrounding Medium ◽  
High Sensitivity ◽  
Liquid Composition ◽  
Industrial Processes ◽  
Differential Mode ◽  
Resonant Sensors ◽  
Dielectric Characterization ◽  
Recent Developments ◽  
Microwave Sensors

Microwave sensors based on electrically small planar resonant elements are reviewed in this paper. By virtue of the high sensitivity of such resonators to the properties of their surrounding medium, particularly the dielectric constant and the loss factor, these sensors are of special interest (although not exclusive) for dielectric characterization of solids and liquids, and for the measurement of material composition. Several sensing strategies are presented, with special emphasis on differential-mode sensors. The main advantages and limitations of such techniques are discussed, and several prototype examples are reported, mainly including sensors for measuring the dielectric properties of solids, and sensors based on microfluidics (useful for liquid characterization and liquid composition). The proposed sensors have high potential for application in real scenarios (including industrial processes and characterization of biosamples).

scholarly journals Microwave Sensors Based on Symmetry Properties of Resonator-Loaded Transmission Lines

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Jordi Naqui ◽  
Ferran Martín
Keyword(s):  
Transmission Lines ◽  
Environmental Conditions ◽  
Review Paper ◽  
Rotation Speed ◽  
Angular Displacement ◽  
Operating Principle ◽  
Displacement Sensors ◽  
Symmetry Properties ◽  
Microwave Sensors

This review paper is focused on the design of microwave sensors using symmetry properties of transmission lines loaded with symmetric resonators. The operating principle of these sensors is presented and then several prototype devices are reported, including linear and angular displacement sensors and rotation speed sensors. The main advantage of the proposed sensors is the robustness against changing environmental conditions.

Microwave dielectric characterization of bulk ferroelectrics

1998 ◽  
Vol 08 (PR9) ◽  
pp. Pr9-113-Pr9-116 ◽  
Author(s):  
C. M. Weil ◽  
R. G. Geyer ◽  
L. Sengupta
Keyword(s):  
Dielectric Characterization ◽  
Microwave Dielectric
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