Two‐dimensional displacement and alignment sensor based on reflection coefficients of open microstrip lines loaded with split ring resonators

This paper is focused on magnetic-LC (MLC) resonators, namely, slotted resonators that can be considered the complementary counterparts of the so-called electric-LC (ELC) resonators. Both resonators exhibit two symmetry planes (i.e., they are bisymmetric), one of them being an electric wall and the other a magnetic wall at the fundamental resonance. Therefore, compared to other electrically small resonators such as folded stepped impedance resonators (SIRs), split ring resonators (SRRs), and their complementary counterparts, MLC and ELC resonators exhibit a very rich phenomenology. In this paper, single-ended microstrip lines and differential microstrip lines loaded with MLC resonators are studied, and potential applications are highlighted.

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Parametric analysis of microstrip lines loaded with complementary split ring resonators

Microwave and Optical Technology Letters ◽

10.1002/mop.23571 ◽

2008 ◽

Vol 50 (8) ◽

pp. 2093-2096 ◽

Cited By ~ 25

Author(s):

Jordi Bonache ◽

Marta Gil ◽

Oscar García-Abad ◽

Ferran Martín

Keyword(s):

Parametric Analysis ◽

Ring Resonators ◽

Split Ring ◽

Split Ring Resonators ◽

Microstrip Lines

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Two-dimensional alignment and displacement sensor based on movable broadside-coupled split ring resonators

Sensors and Actuators A Physical ◽

10.1016/j.sna.2014.01.030 ◽

2014 ◽

Vol 210 ◽

pp. 18-24 ◽

Cited By ~ 84

Author(s):

Ali K. Horestani ◽

Jordi Naqui ◽

Zahra Shaterian ◽

Derek Abbott ◽

Christophe Fumeaux ◽

...

Keyword(s):

Ring Resonators ◽

Displacement Sensor ◽

Two Dimensional ◽

Split Ring ◽

Split Ring Resonators

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Microfluidic reflective-mode differential sensor based on open split ring resonators (OSRRs)

International Journal of Microwave and Wireless Technologies ◽

10.1017/s1759078720000501 ◽

2020 ◽

Vol 12 (7) ◽

pp. 588-597 ◽

Cited By ~ 5

Author(s):

J. Muñoz-Enano ◽

P. Vélez ◽

M. Gil ◽

F. Martín

Keyword(s):

Reflection Coefficient ◽

Output Signal ◽

Ring Resonators ◽

Microfluidic Channels ◽

Reflection Coefficients ◽

Split Ring ◽

Split Ring Resonators ◽

Dielectric Loading ◽

Hybrid Coupler ◽

The Individual

AbstractThis paper proposes a differential sensor based on a pair of open split ring resonators (OSRR) operating in reflection. The output signal is thus the differential reflection coefficient of both resonators, intimately related to their dielectric loading. Thus, for identical loads in both sensing resonators, the individual reflection coefficients are equal, thereby providing an ideally null output signal. By contrast, when unequal dielectric loads truncate the symmetry, the reflection coefficients are different, resulting in a differential output signal related to the level of asymmetry. In order to ease the measurement of the output signal, a rat-race hybrid coupler is used. The OSRR sensing loads are connected to the coupled ports of the hybrid coupler, whereas the input signal is injected to the Δ-port, and the output signal is collected at the isolated port (Σ-port). By this means, the output signal, i.e. the differential reflection coefficient between both sensing loads, is obtained from the transmission coefficient of a simple two-port structure. For experimental validation purposes, the sensor is applied to the measurement of isopropanol content in aqueous solutions, and for that purpose, the sensitive regions are equipped with microfluidic channels.

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