Permittivity

View this topic in
In electromagnetism, permittivity is the measure of the resistance that is encountered when forming an electric field in a medium. (Wikipedia.org)






Conferences related to Permittivity

Back to Top

2020 IEEE International Conference on Plasma Science (ICOPS)

IEEE International Conference on Plasma Science (ICOPS) is an annual conference coordinated by the Plasma Science and Application Committee (PSAC) of the IEEE Nuclear & Plasma Sciences Society.


2020 IEEE International Instrumentation and Measurement Technology Conference (I2MTC)

The Conference focuses on all aspects of instrumentation and measurement science andtechnology research development and applications. The list of program topics includes but isnot limited to: Measurement Science & Education, Measurement Systems, Measurement DataAcquisition, Measurements of Physical Quantities, and Measurement Applications.


2020 Joint Conference of the IEEE International Frequency Control Symposium and International Symposium on Applications of Ferroelectrics (IFCS-ISAF)

Ferroelectric materials and applications


2019 44th International Conference on Infrared, Millimeter, and Terahertz Waves (IRMMW-THz)

Science, technology and applications spanning the millimeter-waves, terahertz and infrared spectral regions


2019 Conference on Microwave Techniques (COMITE)

The scope of the conference is the presentation of the latest development in the area ofmicrowave circuits and systems, antenna design and modelling, communication systems,microwave circuits and systems, signal propagation, EMC and related disciplines.


More Conferences

Periodicals related to Permittivity

Back to Top

Antennas 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.


Antennas and Wireless Propagation Letters, IEEE

IEEE Antennas and Wireless Propagation Letters (AWP Letters) will be devoted to the rapid electronic publication of short manuscripts in the technical areas of Antennas and Wireless Propagation.


Applied Superconductivity, IEEE Transactions on

Contains articles on the applications and other relevant technology. Electronic applications include analog and digital circuits employing thin films and active devices such as Josephson junctions. Power applications include magnet design as well asmotors, generators, and power transmission


Biomedical Circuits and Systems, IEEE Transactions on

The Transactions on Biomedical Circuits and Systems addresses areas at the crossroads of Circuits and Systems and Life Sciences. The main emphasis is on microelectronic issues in a wide range of applications found in life sciences, physical sciences and engineering. The primary goal of the journal is to bridge the unique scientific and technical activities of the Circuits and Systems ...


Biomedical Engineering, IEEE Transactions on

Broad coverage of concepts and methods of the physical and engineering sciences applied in biology and medicine, ranging from formalized mathematical theory through experimental science and technological development to practical clinical applications.


More Periodicals


Xplore Articles related to Permittivity

Back to Top

Automatic Measurement of Amplitude and Phase of Microwave Signals Over Broad Frequence Range

1984 International Symposium on Electromagnetic Compatibility, 1984

An automatic microwave vector-voltmeter system for accurate characterization of microwave signal in terms of its amplitude and phase operating over broad frequency range is described. Basic principles of the system operation along with the particularities related to both hardware and software practical solutions are also discussed. The results presented in the paper show that the accuracy of the measured signals ...


Reply to Comments on “A Novel Technique for Measuring One-Dimensional Permittivity Profiles Using a Simple Non-Commensurate Planar Structure”

IEEE Microwave and Wireless Components Letters, 2012

This paper is reply to comment on "A Novel Technique for Measuring One- dimensional Permittivity Profiles Using a Simple Non-commensurate Planar Structure”. Commentator's claim that formula (1) of our paper is an approximate one and is valid only for low permittivity materials is correct. The error due to using formula (1) instead of the rigorous formula (6) shown by Ogunlade ...


Characterization of SU-8 using terahertz time-domain spectroscopy

2013 USNC-URSI Radio Science Meeting (Joint with AP-S Symposium), 2013

Summary form only given. Among available materials for millimeter wave applications, SU-8 is one of the best choices due to its low dielectric losses and fine resolutions of UV-lithographic processing techniques. Of importance is that SU-8 can allow the generation of thick material layers (on the order of 500μm), making SU-8 very attractive for monolithic integration of mmWave on-chip interconnects ...


Metamaterial substrate for measurement of complex permittivity of liquids using open-ended coaxial-line probes

2011 21st International Crimean Conference "Microwave & Telecommunication Technology", 2011

The new technique for determination of complex permittivity of a liquid media by open-ended coaxial line probes, based on using metamaterial substrate with known characteristics, is proposed. Following this technique, determination of wide variations of complex permittivity of liquid from only amplitude measurements of a reflection coefficient in a finite frequency range in combination with fitting optimal thickness of a ...


Determination of the Complex Permittivity of Vermiculite using a Microstrip Line

IEEE Latin America Transactions, 2014

The way different materials react when submitted to microwave radiation depends strongly on its dielectric properties. Thus, in industrial processes that employ microwaves it is important to previously know the properties of the material to be processed in particular its dielectric characteristics. It is necessary to know the complex permittivity of the material in order to design a suitable cavity ...


More Xplore Articles

Educational Resources on Permittivity

Back to Top

IEEE.tv Videos

No IEEE.tv Videos are currently tagged "Permittivity"

IEEE-USA E-Books

  • Automatic Measurement of Amplitude and Phase of Microwave Signals Over Broad Frequence Range

    An automatic microwave vector-voltmeter system for accurate characterization of microwave signal in terms of its amplitude and phase operating over broad frequency range is described. Basic principles of the system operation along with the particularities related to both hardware and software practical solutions are also discussed. The results presented in the paper show that the accuracy of the measured signals amplitudes were better than 1 dB, and the phase were better than 2 deg. These have been measured over the frequency range from 8 to 18 GHZ.

  • Reply to Comments on “A Novel Technique for Measuring One-Dimensional Permittivity Profiles Using a Simple Non-Commensurate Planar Structure”

    This paper is reply to comment on "A Novel Technique for Measuring One- dimensional Permittivity Profiles Using a Simple Non-commensurate Planar Structure”. Commentator's claim that formula (1) of our paper is an approximate one and is valid only for low permittivity materials is correct. The error due to using formula (1) instead of the rigorous formula (6) shown by Ogunlade is within the measuring error, but it can become of several percent in case of high permittivity materials. The error, of course, increases not only with the permittivity of the MUT, but also when the length covered by the MUT approaches one half of the stub length, while it reduces to zero when the MUT covers the entire stub length.

  • Characterization of SU-8 using terahertz time-domain spectroscopy

    Summary form only given. Among available materials for millimeter wave applications, SU-8 is one of the best choices due to its low dielectric losses and fine resolutions of UV-lithographic processing techniques. Of importance is that SU-8 can allow the generation of thick material layers (on the order of 500μm), making SU-8 very attractive for monolithic integration of mmWave on-chip interconnects and large bandwidth antennas post-chip production. SU-8 is commercially available in several forms, and can be processed with precise thicknesses and under various temperature conditions. However, the electromagnetic properties (permittivity and loss tangent) specified by the manufacturer are only provided at low frequencies. In the case of mmWave and sub-mmWave frequencies, accurate characterization of the permittivity and material loss is necessary prior to prototyping. The effects of processing on material losses is also important and has been considered by other authors for cured and uncured SU-8 samples (M. Naftaly and R. Miles, Proc. of IEEE, Vol. 95, 2007). Here, we present the characterization of SU-8 samples using terahertz timedomain spectroscopy and transmittance data measured over the 200GHz-1THz band. The generalized transmission coefficient for the 430-μm- thick SU-8 layer is used to extract the frequency dependent complex permittivity ε(ω) = ε'(ω) - Iε''(ω) using a quadratic polynomial model. Measured data shows that the permittivity that is approximately εr=3.23 and εr =2.92 at 200GHz and 1THz, respectively. The loss tangent for SU-8 was found to be tanδ=0.027 (at 200GHz) and tanδ=0.055 (at 1THz). This data were also used to extrapolate the loss tangent down to 1GHz, giving tanδ=0.016, consistent with the manufacturers' specification. Such favorable levels of material losses should enable the design and fabrication of a wide range of mmWave and THz components, interconnects, and radiators.

  • Metamaterial substrate for measurement of complex permittivity of liquids using open-ended coaxial-line probes

    The new technique for determination of complex permittivity of a liquid media by open-ended coaxial line probes, based on using metamaterial substrate with known characteristics, is proposed. Following this technique, determination of wide variations of complex permittivity of liquid from only amplitude measurements of a reflection coefficient in a finite frequency range in combination with fitting optimal thickness of a tested layer of liquid is possible.

  • Determination of the Complex Permittivity of Vermiculite using a Microstrip Line

    The way different materials react when submitted to microwave radiation depends strongly on its dielectric properties. Thus, in industrial processes that employ microwaves it is important to previously know the properties of the material to be processed in particular its dielectric characteristics. It is necessary to know the complex permittivity of the material in order to design a suitable cavity for processing, taken into account its dielectric characteristics. Another important factor to be considered is the variation of the AC conductivity, which is strongly influenced by the behavior of the charge carriers with frequency. In the present study, a microstrip line was used in the determination of the complex permittivity of vermiculite in frequencies ranging from 1.60 GHz to 2.00 GHz and at 2.45 GHz. The technique is based on the measured S-parameters, followed by a numerical determination through a MATLAB code based on the Nicolson - Ross - Weir non- iterative method. The method used in this research presented good accuracy and is very suitable for studies involving phyllosilicate minerals.

  • Permittivity determination in the T-junction with multimode resonator

    A physical model of microwave measuring of the permittivity on the basis of the waveguide T-junction with the multimode resonator is considered. The rigorous solution of the diffraction problem is obtained in the form of the linear algebraic equations system. Amplitude-frequency characteristics for various relations between wavelengths, geometrical sizes of structure and the material parameters of media are calculated. The practical application of the considered model - the trapped modes regime in the multimode resonator and resonant wave propagation in the medium are selected.

  • Millimeter-wave (MMW) characterization of low-loss dielectric materials of unknown thickness from free-space measurements

    In last several decades, the free-space measurement methods have been popularly employed to characterize dielectric materials at microwave frequencies. The conventional methods based on transmission and/or reflection scattering parameter measurements for test materials with vector network analyzers (VNAs) derive complex permittivity in broadband frequency ranges assuming that dimensions of samples are precisely known prior to measurements.

  • Effects of gamma radiation on dielectric properties of silicones

    In radiation fields where reliability is essential, silicone insulation systems should be considered for electrical and electronic equipment. This conclusion is based upon a study of the dielectric properties of silicones during and after irradiation. The radiation source used in this study was a multikilocurie Cobalt 60 source which emitted gamma rays of approximately 1.25 Mev energy. Samples exposed to this radiation were in air at 25C. The duty cycle for this source was about 20 hours "on" and 4 hours "off" per day.

  • Broadband Permittivity Measurements up to 170-GHz Using Balanced-Type Circular-Disk Resonator Excited by 0.8-mm Coaxial Line

    This paper describes the broadband permittivity measurements up to 170 GHz of plate samples by using a balanced-type circular-disk resonator (BCDR) excited by a 0.8-mm coaxial line. Because only the TM₀ₘ₀ modes are selectively excited in the BCDR and their resonant frequencies largely change by changing the size of the circular disk that constitutes the resonator, the BCDR method provides permittivity measurements at an almost arbitrary frequency across a wideband. We have increased the maximum measurable frequency of the BCDR method to 170 GHz by developing a BCDR excited by a 0.8-mm coaxial line and by improving the analysis method. We demonstrated that highly stable and rather simple permittivity measurements up to 170 GHz can be realized by the BCDR method by confirming that the measured complex permittivities of a low-loss material from 11.3 to 167 GHz at 59 frequency points obtained with five circular disks of different radii are consistent within the uncertainties.

  • Calibration-independent method for complex permittivity determination of liquid and granular materials

    A new calibration-independent method for complex permittivity extraction of liquid and granular materials is proposed. The advantages of the method are: it only needs the measurement of one measurement cell loaded with the sample; and it eliminates, if any, nonuniformities of the extra measurement cell, which is needed by the methods given in the literature. The method is validated by calibrated and uncalibrated complex scattering parameter measurements of the ethyl alcohol poured into a waveguide cell at X-band.



Standards related to Permittivity

Back to Top

IEEE Recommended Practice for Determining the Peak Spatial-Average Specific Absorption Rate (SAR) in the Human Head from Wireless Communications Devices: Measurement Techniques

To specify protocols for the measurement of the peak spatial-average specific absorption rate (SAR) in a simplified model of the head of users of hand-held radio transceivers used for personal wireless communications services and intended to be operated while held next to the ear. It applies to contemporary and future devices with the same or similar operational characteristics as contemporary ...


IEEE Recommended Practice for Measurements and Computations of Radio Frequency Electromagnetic Fields With Respect to Human Exposure to Such Fields, 100 kHz-300 GHz

Revise and develop specifications for preferred methods for measuring and computing external radiofrequency electromagnetic fields to which persons may be exposed. In addition, the document will specify preferred methods for the measurement and computation of the resulting fields and currents that are induced in bodies of humans exposed to these fields over the frequency range of 100 kHz to 300 ...


IEEE Standard for Safety Levels with Respect to Human Exposure to Radio Frequency Electromagnetic Fields, 3 kHz to 300 GHz

Recommendations are made to protect against established adverse health effects in human beings associated with exposure to electric, magnetic and electromagnetic fields in the frequency range of 3 kHz to 300 GHz. The recommendations are expressed in terms of basic restrictions (BRs) and maximum permissible exposure (MPE) values. The BRs are limits on internal fields, specific absorption rate (SAR), and ...


Recommended Practice for Measurements and Computation of Electric, Magnetic and Electromagnetic Fields With Respect to Human Exposure to Such Fields, 0 - 100 kHz

This recommended practice describes 1) methods for measuring external electric and magnetic fields and contact currents to which persons may be exposed, 2) instrument characteristics and the methods for calibrating such instruments, and 3) methods for computation and the measurement of the resulting fields and currents that are induced in bodies of humans exposed to these fields. This recommended practice ...



Jobs related to Permittivity

Back to Top