Frequency Multiplexed 2-Dimensional Sensor Array Based on Split-Ring Resonators for Organic Tissue Analysis

Puentes, Margarita; Maasch, Matthias; Schüßler, Martin; Jakoby, Rolf

doi:10.1109/tmtt.2012.2189241

Cited by 69 publications

(42 citation statements)

References 19 publications

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“…In particular, split ring resonators (SRRs) [2], and other related particles, have been exhaustively used for sensing purposes due to their small electrical size and high-factor at the fundamental resonance. Different kind of sensors based on SRRs have been proposed, such as thin-film sensors [3], particle detectors [4], [5], stress sensors [6], moisture sensors [7], pressure sensors [8], displacement sensors [9], [10], or sensors for organic tissue analysis [11].…”

mentioning

confidence: 99%

Transmission Lines Loaded With Bisymmetric Resonators and Their Application to Angular Displacement and Velocity Sensors

Naqui

Martín

2013

IEEE Trans. Microwave Theory Techn.

189

119

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This paper is focused on the analysis of coplanar waveguides (CPWs) loaded with circularly shaped electric-LC (ELC) resonators, the latter consisting of two coplanar loops connected in parallel through a common gap. Specifically, the resonator axis is aligned with the CPW axis, and a dynamic loading with ELC rotation is considered. Since the ELC resonator is bisymmetric, i.e., it exhibits two orthogonal symmetry planes, the angular orientation range is limited to 90 . It is shown that the transmission and reflection coefficients of the structure depend on the angular orientation of the ELC. In particular, the loaded CPW behaves as a transmission line-type (i.e., all-pass) structure for a certain ELC orientation (0 ) since the resonator is not excited. However, by rotating the ELC, magnetic coupling to the line arises, and a notch in the transmission coefficient (with orientation dependent depth and bandwidth) appears. This feature is exploited to implement angular displacement sensors by measuring the notch depth in the transmission coefficient. To gain more insight on sensor design, the lumped element equivalent-circuit model for ELC-loaded CPWs with arbitrary ELC orientation is proposed and validated. Based on this approach, a prototype displacement sensor is designed and characterized. It is shown that by introducing additional elements (a circulator and an envelope detector), novel and high precision angular velocity sensors can also be implemented. An angular velocity sensor is thus proposed, characterized, and satisfactorily validated. The proposed solution for angular sensing is robust against environmental variations since it is based on the geometrical alignment/misalignment between the symmetry planes of the coupled elements.

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mentioning

confidence: 99%

Transmission Lines Loaded With Bisymmetric Resonators and Their Application to Angular Displacement and Velocity Sensors

Naqui

Martín

2013

IEEE Trans. Microwave Theory Techn.

189

119

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“…Hence, metamaterials suitable for organic tissue tumor analysis was proposed in [15]. It made use of a multiplexed 2D sensor array developed based on Split Ring Resonators.…”

Section: Metamaterials In Organic Tissue Analysismentioning

confidence: 99%

Survey on metamaterials in bio-medicine

Rosaline

Raghavan

2013

2013 IEEE International Conference on Computational Intelligence and Computing Research

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Microwave antennas and sensors employed in bio-medical field can be used either for diagnosis like Magnetic Resonance Imaging (MRI), Microwave Computed Tomography (CT) or therapeutic purposes like Hyperthermia, Coagulation. Accurate diagnosis and treatment have always been a challenging task.This paper focuses on new material of the era, named Metamaterial which has a special feature of exhibiting a negative Refractive Index at desired frequency. This article gives a brief review over the features of metamaterials and their significance over prevention, detection or therapy of few disorders. The design concept of metamaterials in the desired ISM band is also reviewed. The advent of these materials has been discussed on diagnosis of breast tumors, MR Imaging, strain sensing, organic tissue analysis, Hyperthermia and Specific Absorption Rate (SAR) analysis. Implantable and Resorbable antennas are also presented.

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“…Frequency domain multiplexing technique provides another way of increasing the readout efficiency . [11][12][13][14][15][16][17][18] An object can be sensed from the reflection of a transmission line , 11,12 but the information of all the elements are coupled together, resulting in a large uncertainty.…”

Section: Introductionmentioning

confidence: 99%

“…Previously such multi-resonance method has been demonstrated with split-ring resonator (SRR). 17,18 With the help of SRR, the localized electric field is enhanced in the gap of the SRR so as the sensitivity is increased. On the other hand, the sensing area is limited to the small gap region of the SRR and the object has to be in contact with the sensor.…”

Section: Introductionmentioning

confidence: 99%

A multidirectional capacitive proximity sensor array

Long

Wang

2014

SPIE Proceedings

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This paper presents a multi-directional capacitive proximity sensor array based on band-stop filter. The band-stop filter is composed of four decoupled LC resonant circuits, so each stop band is determined by one capacitive sensor and its corresponding lumped inductor, respectively. Therefore, the change in capacitance can be obtained by measuring the change of the notches of the band-stop response. The filter is fabricated into a cubic shape for sensing different directions. Experiment results show that the fabricated sensor can detect objects coming from all four directions simultaneously by measuring the transmission at frequencies near four notches. (2014) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only. SPIE Proceedings Vol 9116This work may not be copied or reproduced in whole or in part for any commercial purpose. Permission to copy in whole or in part without payment of fee is granted for nonprofit educational and research purposes provided that all such whole or partial copies include the following: a notice that such copying is by permission of Mitsubishi Electric Research Laboratories, Inc.; an acknowledgment of the authors and individual contributions to the work; and all applicable portions of the copyright notice. Copying, reproduction, or republishing for any other purpose shall require a license with payment of fee to Mitsubishi Electric Research Laboratories, Inc. All rights reserved. ABSTRACT This paper presents a multi-directional capacitive proximity sensor array based on band-stop filter. The bandstop filter is composed of four decoupled LC resonant circuits, so each stop band is determined by one capacitive sensor and its corresponding lumped inductor, respectively. Therefore, the change in capacitance can be obtained by measuring the change of the notches of the band-stop response. The filter is fabricated into a cubic shape for sensing different directions. Experiment results show that the fabricated sensor can detect objects coming from all four directions simultaneously by measuring the transmission at frequencies near four notches.

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Frequency Multiplexed 2-Dimensional Sensor Array Based on Split-Ring Resonators for Organic Tissue Analysis

Cited by 69 publications

References 19 publications

Transmission Lines Loaded With Bisymmetric Resonators and Their Application to Angular Displacement and Velocity Sensors

Transmission Lines Loaded With Bisymmetric Resonators and Their Application to Angular Displacement and Velocity Sensors

Survey on metamaterials in bio-medicine

A multidirectional capacitive proximity sensor array

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