Transmission lines loaded with pairs of magnetically coupled stepped impedance resonators (SIRs): Modeling and application to microwave sensors

2014 ◽  
Author(s):  
Jordi Naqui ◽  
Christian Damm ◽  
Alex Wiens ◽  
Rolf Jakoby ◽  
Lijuan Su ◽  
...  
Keyword(s):  
Transmission Lines ◽  
Microwave Sensors

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.

scholarly journals Planar Phase-Variation Microwave Sensors for Material Characterization: A Review and Comparison of Various Approaches

Sensors ◽  
2021 ◽  
Vol 21 (4) ◽  
pp. 1542
Author(s):  
Jonathan Muñoz-Enano ◽  
Jan Coromina ◽  
Paris Vélez ◽  
Lijuan Su ◽  
Marta Gil ◽  
...  
Keyword(s):  
Transmission Lines ◽  
Material Characterization ◽  
Low Cost ◽  
Phase Variation ◽  
Single Frequency ◽  
Dispersion Engineering ◽  
Low Profile ◽  
Planar Phase ◽  
Sensitivity Improvement ◽  
Microwave Sensors

Planar phase-variation microwave sensors have attracted increasing interest in recent years since they combine the advantages of planar technology (including low cost, low profile, and sensor integration with the associated circuitry for post-processing and communication purposes, among others) and the possibility of operation at a single frequency (thereby reducing the costs of the associated electronics). This paper reviews and compares three different strategies for sensitivity improvement in such phase-variation sensors (devoted to material characterization). The considered approaches include line elongation (through meandering), dispersion engineering (by considering slow-wave artificial transmission lines), and reflective-mode sensors based on step-impedance open-ended lines. It is shown that unprecedented sensitivities compatible with small sensing regions are achievable with the latter approach.

Artificial transmission lines for high sensitive microwave sensors

2009 ◽  
Author(s):  
C. Damm ◽  
M. Schussler ◽  
M. Puentes ◽  
H. Maune ◽  
M. Maasch ◽  
...  
Keyword(s):  
Transmission Lines ◽  
Microwave Sensors

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.

Composite right/left-handed transmission line with array of thermocouples for generating terahertz radiation

2020 ◽  
Vol 92 (2) ◽  
pp. 20502
Author(s):  
Behrokh Beiranvand ◽  
Alexander S. Sobolev ◽  
Anton V. Kudryashov
Keyword(s):  
Transmission Line ◽  
Terahertz Radiation ◽  
Transmission Lines ◽  
Software Package ◽  
Optical Pulses ◽  
Capacitively Coupled ◽  
Voltage Difference ◽  
Left Handed ◽  
Microwave Transmission ◽  
Commercial Software Package

We present a new concept of the thermoelectric structure that generates microwave and terahertz signals when illuminated by femtosecond optical pulses. The structure consists of a series array of capacitively coupled thermocouples. The array acts as a hybrid type microwave transmission line with anomalous dispersion and phase velocity higher than the velocity of light. This allows for adding up the responces from all the thermocouples in phase. The array is easily integrable with microstrip transmission lines. Dispersion curves obtained from both the lumped network scheme and numerical simulations are presented. The connection of the thermocouples is a composite right/left-handed transmission line, which can receive terahertz radiation from the transmission line ports. The radiation of the photon to the surface of the thermocouple structure causes a voltage difference with the bandwidth of terahertz. We examined a lossy composite right/left-handed transmission line to extract the circuit elements. The calculated properties of the design are extracted by employing commercial software package CST STUDIO SUITE.

Time-domain analysis of dispersive transmission lines

1993 ◽  
Vol 3 (3) ◽  
pp. 581-591 ◽  
Author(s):  
Wojciech Gwarek ◽  
Malgorzata Celuch-Marcysiak
Keyword(s):  
Transmission Lines ◽  
Time Domain ◽  
Time Domain Analysis ◽  
Domain Analysis
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