Permittivity
28,035 resources related to Permittivity
IEEE Organizations related to Permittivity
Back to TopConferences related to Permittivity
Back to Top2010 9th International Power & Energy Conference (IPEC 2010)
The theme of the conference is "Developing Electrical Power and Energy Systems through Technological Innovation". IPEC2010 welcomes technical contributions in all areas of power engineering and power electronics, with special emphasis on the theme of the conference.
2005 IEEE Antennas and Propagation Society International Symposium and URSI National Radio Science Meeting
Periodicals related to Permittivity
Back to TopAntennas and Propagation, IEEE Transactions on
Experimental and theoretical advances in antennas including design and development, and in the propagation of electromagnetic waves including scattering, diffraction and interaction with continuous media; and applications pertinent to antennas and propagation, such as remote sensing, applied optics, and millimeter and submillimeter wave techniques.
Dielectrics and Electrical Insulation, IEEE Transactions on
Electrical insulation common to the design and construction of components and equipment for use in electric and electronic circuits and distribution systems at all frequencies.
Geoscience and Remote Sensing Letters, IEEE
It is expected that GRS Letters will apply to a wide range of remote sensing activities looking to publish shorter, highimpact papers. Topics covered will remain within the IEEE Geoscience and Remote Sensing Societys field of interest: the theory, concepts, and techniques of science and engineering as they apply to the sensing of the earth, oceans, atmosphere, and space; and ...
Geoscience and Remote Sensing, IEEE Transactions on
Theory, concepts, and techniques of science and engineering as applied to sensing the earth, oceans, atmosphere, and space; and the processing, interpretation, and dissemination of this information.
Instrumentation and Measurement, IEEE Transactions on
Measurements and instrumentation utilizing electrical and electronic techniques.
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Xplore Articles related to Permittivity
Back to TopDesign of an interdigitated microelectrode biosensor using aSiC:H surface to capture E. coli
José HerreraCelis; Claudia ReyesBetanzo; Abdu OrduñaDíaz 2015 30th Symposium on Microelectronics Technology and Devices (SBMicro), 2015
This work proposes an interdigitated microelectrode biosensor (IMB), which includes hydrogenated amorphous silicon carbide (aSiC:H) as surface to be functionalized. Accordingly, two aSiC:H films are included, one on top of SiO2, and another on top of microelectrodes. The design along with the medium were simulated on CoventorWare® software, taking into account that the IMB proposed will be for the detection ...
F. V. Fedotov; A. G. Nerukh; T. M. Benson; P. Sewell Journal of Lightwave Technology, 2003
The application of the Volterra integral equation method for investigations of the interaction of electromagnetic fields with a onedimensional timevarying dielectric layer is considered. The medium permittivity inside the layer may change in time owing to a nonlinearity as well as to extrinsic sources. Original software for the computer modeling of such an interaction is developed. Numerical results are presented ...
A new simple and accurate formula for microstrip radial stub
R. Sorrentino; L. Roselli IEEE Microwave and Guided Wave Letters, 1992
A closedform formula is derived for the input impedance of the microstrip radial stub. The formula combines the simplicity of the radial transmission line approach and the accuracy of the resonant mode expansion technique.<>
Absorption features of symmetric molecular nanofilms
J. P. Šetrajčić; S. S. Pelemiš; S. M. Vučenović; V. M. Zorić; S. Armaković; B. Škipina; A. J. Štrajčić 2010 27th International Conference on Microelectronics Proceedings, 2010
A microscopic theory of dielectric properties of symmetrical ultrathin molecular films, was formulated in bosonic and nearestneighbor approximation. The dispersion law of harmonic exciton states were calculated using the method of twotime, temperature dependent Green's functions. It has been shown that two types of excitations can be occurred: bulk and surface exciton states. Exciton spectral weights and space distribution along ...
Frequency performance of 4layer discretized Luneburg antennas
D. Gray; N. Nikolic; J. Thornton 2016 IEEEAPS Topical Conference on Antennas and Propagation in Wireless Communications (APWC), 2016
A series of 8λ0 to 14λ0 radius 4layer stepped approximation Luneburg lenses were designed for the same scalar feed positioned at 1.1 lens radii. The relative permittivities and normalized thicknesses of the matching layers of each lens were close but not equal. The lenses were simulated in commercially available full wave simulators. The aperture efficiencies decreased as the lens radii ...
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Educational Resources on Permittivity
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Design of an interdigitated microelectrode biosensor using aSiC:H surface to capture E. coli
José HerreraCelis; Claudia ReyesBetanzo; Abdu OrduñaDíaz 2015 30th Symposium on Microelectronics Technology and Devices (SBMicro), 2015
This work proposes an interdigitated microelectrode biosensor (IMB), which includes hydrogenated amorphous silicon carbide (aSiC:H) as surface to be functionalized. Accordingly, two aSiC:H films are included, one on top of SiO2, and another on top of microelectrodes. The design along with the medium were simulated on CoventorWare® software, taking into account that the IMB proposed will be for the detection ...
F. V. Fedotov; A. G. Nerukh; T. M. Benson; P. Sewell Journal of Lightwave Technology, 2003
The application of the Volterra integral equation method for investigations of the interaction of electromagnetic fields with a onedimensional timevarying dielectric layer is considered. The medium permittivity inside the layer may change in time owing to a nonlinearity as well as to extrinsic sources. Original software for the computer modeling of such an interaction is developed. Numerical results are presented ...
A new simple and accurate formula for microstrip radial stub
R. Sorrentino; L. Roselli IEEE Microwave and Guided Wave Letters, 1992
A closedform formula is derived for the input impedance of the microstrip radial stub. The formula combines the simplicity of the radial transmission line approach and the accuracy of the resonant mode expansion technique.<>
Absorption features of symmetric molecular nanofilms
J. P. Šetrajčić; S. S. Pelemiš; S. M. Vučenović; V. M. Zorić; S. Armaković; B. Škipina; A. J. Štrajčić 2010 27th International Conference on Microelectronics Proceedings, 2010
A microscopic theory of dielectric properties of symmetrical ultrathin molecular films, was formulated in bosonic and nearestneighbor approximation. The dispersion law of harmonic exciton states were calculated using the method of twotime, temperature dependent Green's functions. It has been shown that two types of excitations can be occurred: bulk and surface exciton states. Exciton spectral weights and space distribution along ...
Frequency performance of 4layer discretized Luneburg antennas
D. Gray; N. Nikolic; J. Thornton 2016 IEEEAPS Topical Conference on Antennas and Propagation in Wireless Communications (APWC), 2016
A series of 8λ0 to 14λ0 radius 4layer stepped approximation Luneburg lenses were designed for the same scalar feed positioned at 1.1 lens radii. The relative permittivities and normalized thicknesses of the matching layers of each lens were close but not equal. The lenses were simulated in commercially available full wave simulators. The aperture efficiencies decreased as the lens radii ...
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IEEEUSA EBooks

Categorization of Natural Materials and Metamaterials
An electromagnetic material is categorized by its constitutional parameters, permittivity ¿¿ and permeability ¿¿. A double¿¿?positive (DPS) material is defined as a right¿¿?handed (RH) material. The phase constant of wave propagation within the RH material exhibits a positive value. A double¿¿?negative (DNG) material is defined as a left¿¿?handed (LH) material. The phase constant of wave propagation within the LH material exhibits a negative value. A DPS material is a material found easily in nature and called a natural material, while a DNG, mu¿¿?negative (MNG) material is an artificial material and called a metamaterial (MTM). Most antennas are made of natural materials. This chapter presents the categorization of natural and metamaterial antennas in reference to ¿¿, the propagation phase constant of the current flowing along a fed element. It explains categorization using examples and shows spiral antennas, a spiral with a cavity and a spiral antenna above an electromagnetic band gap (EBG) reflector.

Quite unlike a microstrip, a coplanar waveguide (CPW) has its principal grounding in the form of wide strips adjacent to the active conductor. Thus, the signal characteristics are almost entirely governed by laterally defined dimensions. The chapter shows how various like quantities effective permittivity, propagation constant, and phase velocity can be defined for basic CPW. CPW exhibits two distinct transmission loss mechanisms: dielectric losses and also ohmic or conductor losses. Radiation losses can also become noticeable with CPW, but this is much lower than with microstrip. CPW is also to some extent dispersive, that is, the transmission phase constant varies non¿¿¿linearly with frequency. The chapter also describes some passive circuit elements that can be formed using the CPW medium. Air bridges are traditionally necessary in order to maintain the dominant mode in CPW. Significant alternatives to the air bridges are the top and bottom metal shields.

This chapter presents an application of the wideband characteristics of the fan¿¿?shaped radiation element to a card antenna, which is abbreviated as the C¿¿?FanSA. The C¿¿?FanSA composes of a fan¿¿?shaped radiation element and a ground plane, both lying in the same plane, and is designed to operate across a wideband frequency range from 3.1 to 10.6 GHz. The antenna height of the fan¿¿?shaped radiation element above the top edge of the ground plane is chosen to be small (1 cm) for use inside IT mobile devices. The chapter shows the configuration of the C¿¿?FanSA and tabulates the summary of configuration parameters. The analysis is performed using the finite¿¿?difference time¿¿?domain method (FDTDM). The fan¿¿?shaped element and the ground plane are made of a thin conducting film, and the fan¿¿?shaped element itself is sandwiched between thin dielectric layers having relative permittivity ¿¿r and thickness B.

Complex Permittivity of Propagating Media
This chapter contains sections titled: Introduction Basic Mechanisms of the Propagating Material Permittivity of Permanent Polar Molecules Induced Dipole Moments Induced Dipole Response Function, G() Frequency Character of the Permittivity KramersKronig Relations for Induced Moments Arbitrary Time Stimulus Conduction Electron Permittivity Conductivity Response Function Permittivity of Plasma Oscillations Permittivity Summary Empirical Permittivity Theory Applied to Empirical Permittivity Dispersion of a Signal Propagating through a Medium with Complex Permittivity Endnotes

SuperResolving NegativeRefractiveIndex TransmissionLine Lenses
The prelims comprise: The Distributed Dual Transmission Line The Periodic Dual Transmission Line Interpreting Negative Permittivity and Permeability The 2D Dual Transmission Line The NegativeRefractiveIndex (NRI) TL Lens Reflection and Transmission Through the Lossless NRITL Lens The SuperResolving NRI TransmissionLine Lens An Experimental NRITL Lens Characterization of an Experimental NRITL Lens An Isotropic 3D TransmissionLine Metamaterial with a Negative Refractive Index References

Appendix 5: Reference Fields and Scattering Matrices for Multimodal Rectangular Waveguide Filters
This appendix contains sections titled: Reference Electric and Magnetic Fields Scattering Matrix of Multiple Waveguide Sections Scattering Matrix for Discontinuity in Dielectric Permittivity Scattering Matrix for Discontinuity in Waveguide Dimensions References

Microstrip Design at Low Frequencies
Microstrip is a particularly useful transmission line medium for implementation in distributed circuit designs at frequencies from below 1 GHz and up to 110 GHz. This chapter deals with some fundamental aspects of the microstrip structure, and the realization of dimensional design parameters for establishing desired electrical characteristics. It is concerned with basic considerations and microstrip synthesis where the substrate is a homogeneous, isotropic dielectric. The aspects discussed are quasi¿¿¿transverse electromagnetic mode (TEM) of propagation, static¿¿¿TEM parameter effective microstrip permittivity, characteristic impedance, and filling factor. Graphical technique is mainly suitable for approximate guidance purposes. Hence, closed formulas are needed for accurate static¿¿¿TEM design calculations. The chapter considers microstrip synthesis using a dielectrically anisotropic substrate. It discusses the effects of finite thickness and manufacturing tolerances, and provides a description of pulse propagation. Finally, recommendations for microstrip design are presented.

Characterization of the Host Medium
For a correct interpretation of the groundpenetrating radar (GPR) signal, it is important to have some estimation of the electromagnetic characteristics of the background medium. A complete characterization theoretically means a measure of the dielectric permittivity and of the magnetic permeability, both meant as complex quantities to account for losses and variables versus the frequency. In many cases, the propagation medium is a lowlossy medium; that is, the real part of the wavenumber is much larger than the imaginary part. The electromagnetic characteristics of the propagation medium depend on its chemical composition, its water content, its porosity, its mineralogy, and possibly its temperature. The measure of the propagation velocity of the electromagnetic waves in a homogeneous soil might be done, in principle, with a buried marker, similarly to what is described for the case of a wall.

Slotline, which may be used by itself or in association with microstrip, consists of a narrow slot or gap in a thin conductive layer on one side of a dielectric substrate of fairly high permittivity. This chapter explores the fundamentals of slotline such as the basic structure, operating principles, dispersion characteristics, guide wavelength, characteristic impedance, and end effects. Circulators and isolators have been realized using slotline. Slotline is also particularly well suited to realizing broadband antennas as the slot can be gradually opened out so that a traveling wave is gracefully launched into free space. Higher¿¿¿order moding also occurs with slotline and the behavior of the first higher¿¿¿order mode has been investigated. In common with all non¿¿¿TEM transmission mediums, slotline exhibits highly frequency¿¿¿dependent propagation behavior. Like all types of transmission lines, slotline is subject to inherent power losses namely, metallic (conductor), dielectric, and radiative.

This chapter contains sections titled: Overview on Transmission Lines Transmission Line Basics Transmission Line Effects Creating Transmission Lines in a Multilayer PCB Relative Permittivity (Dielectric Constant) Routing Topologies Routing Concerns Capacitive Loading References