A Concept of Moving Dielectrophoresis Electrodes Based on Microelectromechanical Systems (Mems) Actuators

Li, Lijie; Uttamchandani, Deepak

doi:10.2528/pierl07122811

Cited by 3 publications

(3 citation statements)

References 8 publications

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“…In particular, in the case of low mechanical speed, the reflection coefficient for a slow-wave is close to unit when the relative period |a/(nλ)| is near unit, while that for a fast-wave is far from unit. The results are significant for interrelated research in the fields of electromagnetics and electrodynamics, and may have promising applications in other fields such as sensors, actuators [22,23], motion or structure parameter determination, and MEMS devices [24,25].…”

Section: Discussionmentioning

confidence: 97%

Reflection and transmission of electromagnetic slow-waves by a uniformly moving dielectric slab

Xia

Dong

2010

Chin. Sci. Bull.

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The reflection and transmission problem of an electromagnetic slow-wave by a uniformly moving dielectric slab was investigated theoretically. The relationships among the field vectors of the incident, reflected and transmitted waves, and the reflection and transmission coefficients were derived based on the electromagnetic theory and the principle of special relativity. The numerical analysis shows that at a small mechanical velocity the reflection coefficient of the electromagnetic slow-wave can be close to unit by choosing an appropriate period and mode-order; this is obviously different from that of a fast wave. The results are significant for research on electromagnetics and electrodynamics, and may have applicability to other fields. electromagnetic slow-wave, moving dielectric slab, reflection, transmission Citation: Xia D, Dong T L. Reflection and transmission of electromagnetic slow-waves by a uniformly moving dielectric slab.Research on the problem of the scattering of electromagnetic waves by moving objects and media has a long history, and is interesting from a practical and theoretical point of view. Early in the 1960s, Yeh [1-3] in his series of papers discussed a number of problems such as the reflection and transmission of plane electromagnetic waves by a moving dielectric medium, a moving dielectric slab, and a moving plasma medium. Later, Kong and Cheng [4] studied the problems of reflection and refraction of electromagnetic waves by a moving uniaxially anisotropic slab with an arbitrary plane of incidence. Huang et al. [5,6] analyzed the problems of reflection and transmission of electromagnetic waves by a dielectric medium and the reflection problem of plane electromagnetic waves from the surface of a perfect conductor moving in an arbitrary direction. Recently, Censor not only investigated non-relativistic or quasi-relativistic scattering by moving media and objects [7-10], but also developed the pertinent low-frequency scattering problems involving objects moving with arbitrary constant velocities in free space [11]. Moreover, the scattering of an electro-*Corresponding author (magnetic pulse by a perfectly conducting half-plane moving in a free space has also been of interest [12]. In these works, various interesting features were observed concerning the variation in the reflection and transmission coefficients, the angles of reflection and transmission, and the frequencies of the reflected and transmitted waves as functions of the velocity of the moving object. However, in almost all of these problems of electromagnetic wave scattering, the incident wave was a universal fast-wave. Currently, little theoretical work is being done with respect to incident slow-waves. An electromagnetic slow-wave is usually generated by periodic slow-wave structures, such as helix [13,14], grating [15,16] and photonic crystal [17]. Because of the unique characteristics of slow-wave structures [18], the scattering characteristics of incident slow-waves may also be unique and significant in relevant applications...

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Section: Discussionmentioning

confidence: 97%

Reflection and transmission of electromagnetic slow-waves by a uniformly moving dielectric slab

Xia

Dong

2010

Chin. Sci. Bull.

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“…In the literature some works with interdigital sensors, called planar capacitive interdigital multifinger (IDCM), present many applications in the most diverse areas such as chemical, biological, microelectromechanical, telecommunications, and piezoacoustic systems [1][2][3][4][5][6] . New types of interdigital sensors having the most diverse configurations, with different numbers of electrodes, are being studied for various types of projects [7][8][9][10] .…”

Section: Introductionmentioning

confidence: 99%

Novel Planar Capacitive Interdigital Multifinger (IDCM) Sensor for the Detection of the Ageing of Electrical Transformer Oil

Oliveira

Morais

Bessa

et al. 2020

Fine Chemical Engineering

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This work shows a planar interdigital sensor for rapid measurement of oils. The kit is characterised by the impedance meter, a Raspberry Pi3 and a sample port where the planar capacitive interdigital multifinger (IDCM) sensor is stored. For validation of this IDCM sensor, the data was compared with measurements performed by impedance spectroscopy (IS). The measurements show that the measured values of the new and used oils are very close, validating the IDCM sensor for fast oil measurements of oils in transformers and other devices.

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“…Properties of the IDC have been studied by many authors and have shown high performance when being used as sensors involved with many scientific applications. For example, interdigitated sensors are used in telecommunications, biotechnology, chemical sensing, dielectric imaging, acoustic sensors, and microelectromechanical systems (MEMS) applications [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Capacitive Interdigital Sensor With Inhomogeneous Nematic Liquid Crystal Film

Abu-Abed¹,

Lindquist²

2008

PIER B

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Abstract-The performance of capacitive interdigital sensors involved with anisotropic and inhomogeneous nematic liquid crystal (LC) film is investigated. These sensors have potential applications in chemical and biological systems. The theory for modeling the permittivity tensor of the LC film as a function of the molecular orientation is presented. The LC film is handled as inhomogeneous material where molecules are assumed to have different orientations with respect to the frame axes. Under these conditions, fringing field capacitances as functions of the molecular deformations are calculated. Examples of modeled capacitive interdigital sensors in the present of different inhomogeneous distributions of LC films will be studied and discussed.

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A Concept of Moving Dielectrophoresis Electrodes Based on Microelectromechanical Systems (Mems) Actuators

Cited by 3 publications

References 8 publications

Reflection and transmission of electromagnetic slow-waves by a uniformly moving dielectric slab

Reflection and transmission of electromagnetic slow-waves by a uniformly moving dielectric slab

Novel Planar Capacitive Interdigital Multifinger (IDCM) Sensor for the Detection of the Ageing of Electrical Transformer Oil

Capacitive Interdigital Sensor With Inhomogeneous Nematic Liquid Crystal Film

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