Conferences related to Impedance

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2019 URSI International Symposium Symposium on Electromagnetic Theory (EMTS)

The interest of Commission B is fields and waves, encompassing theory, analysis, computation, experiments, validation and applications. Areas of emphasis are 1) Time-domain and frequency-domain phenomena, 2) Scattering and diffraction, 3) General propagation including waves in specialised media, 4) Guided waves, 5) Antennas and radiation, and 6) Inverse scattering and imaging.The Commission fosters the creation, development, and refinement of analytical, numerical, and measurement techniques to understand these phenomena. It encourages innovation and seeks to apply interdisciplinary concepts and methods.


2018 15th International Workshop on Advanced Motion Control (AMC)

1. Advanced Motion Control2. Haptics, Robotics and Human-Machine Systems3. Micro/Nano Motion Control Systems4. Intelligent Motion Control Systems5. Nonlinear, Adaptive and Robust Control Systems6. Motion Systems for Robot Intelligence and Humanoid Robotics7. CPG based Feedback Control, Morphological Control8. Actuators and Sensors in Motion System9. Motion Control of Aerial/Ground/Underwater Robots10. Advanced Dynamics and Motion Control11. Motion Control for Assistive and Rehabilitative Robots and Systems12. Intelligent and Advanced Traffic Controls13. Computer Vision in Motion Control14. Network and Communication Technologies in Motion Control15. Motion Control of Soft Robots16. Automation Technologies in Primary Industries17. Other Topics and Applications Involving Motion Dynamics and Control


2018 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES)

The conference will deal will all aspects of power electronics, motor drives and Power electronics applications to energy systems.


2018 IEEE PES Transmission & Distribution Conference and Exhibition - Latin America (T&D-LA)

The conference will focus on the current state of the art and lessons learned from techniques and practices developed by leading international companies and utilities.


2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT)

ICMMT2018 is intended to provide a broad international forum and nice opportunity for the scientists and engineers to present their new ideas and exchange information on research.


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Periodicals related to Impedance

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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


Automatic Control, IEEE Transactions on

The theory, design and application of Control Systems. It shall encompass components, and the integration of these components, as are necessary for the construction of such systems. The word `systems' as used herein shall be interpreted to include physical, biological, organizational and other entities and combinations thereof, which can be represented through a mathematical symbolism. The Field of Interest: shall ...


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.


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Xplore Articles related to Impedance

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Loading Mechanism of Ultrasonic Biomedical Transducer

Ying Chen 2012 International Conference on Computer Science and Electronics Engineering, 2012

In this paper, an integrated loading model of ultrasonic transducer is established to explain the phenomenon that different tissue loads have different effect on resonance frequency of ultrasonic transducer. Mechanical loss of ultrasonic transducer is taken into consideration in the model and mass-spring-damping tissue model and contact impedance between ultrasonic transducer and tissues are given. Experiments show that this model ...


Capacitively coupled transmission line pulsing CC-TLP – A traceable and reproducible stress method in the CDM-domain

Heinrich Wolf; Horst Gieser; Wolfgang Stadler; Wolfgang Wilkening 2003 Electrical Overstress/Electrostatic Discharge Symposium, 2003

This paper describes a new test method called Capacitively Coupled Transmission Line Pulsing cc-TLP. It is applied to different test circuits which were mounted on specially designed package emulators with a defined background capacitance. The test results are compared with the ESD thresholds obtained by CDM tests. The CC-TLP results correlate well with the CDM data.


Application of a Normally OFF Silicon Carbide Power JFET in a Photovoltaic Inverter

Michael S. Mazzola; Robin Kelley 2009 Twenty-Fourth Annual IEEE Applied Power Electronics Conference and Exposition, 2009

Conventional wisdom that the SiC JFET is only a normally on device has recently been superseded by the first practical normally off SiC JFET. This new true enhancement mode, three-terminal, pure-SiC design provides designers with a normally off solution that retains all the benefits of the normally on SiC JFET. With only a simple change in series gate impedance, the ...


Performance predetermination of variable speed wind-driven grid connected SEIGs

Namani Rakesh; N. Kumaresan; S. Senthil Kumar; M. Subbiah 2012 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES), 2012

A Self Excited Induction Generator (SEIG) system has been proposed for supplying power to the grid through a combination of a three-phase semi- converter (SC) and a line commutated inverter. This system is capable of operating at variable speed to enable maximum power, proportional to the cube of the wind speed, to be extracted from the wind. The method of ...


Transmission line pulsed waveform shaping with microwave filters

Sopan Joshi; Elyse Rosenbaum 2003 Electrical Overstress/Electrostatic Discharge Symposium, 2003

Impedance mismatches in the standard transmission line pulsed (TLP) measurement system will severely distort the pulsed waveform, but use of matched microwave attenuating filters can transform the setup into a 50-Omega TLP system which produces near-ideal waveforms. In addition, passive, lossless low-pass filters can be used to vary the rise time of the pulse. Detailed measurement and microwave simulation results ...


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Educational Resources on Impedance

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eLearning

Loading Mechanism of Ultrasonic Biomedical Transducer

Ying Chen 2012 International Conference on Computer Science and Electronics Engineering, 2012

In this paper, an integrated loading model of ultrasonic transducer is established to explain the phenomenon that different tissue loads have different effect on resonance frequency of ultrasonic transducer. Mechanical loss of ultrasonic transducer is taken into consideration in the model and mass-spring-damping tissue model and contact impedance between ultrasonic transducer and tissues are given. Experiments show that this model ...


Capacitively coupled transmission line pulsing CC-TLP – A traceable and reproducible stress method in the CDM-domain

Heinrich Wolf; Horst Gieser; Wolfgang Stadler; Wolfgang Wilkening 2003 Electrical Overstress/Electrostatic Discharge Symposium, 2003

This paper describes a new test method called Capacitively Coupled Transmission Line Pulsing cc-TLP. It is applied to different test circuits which were mounted on specially designed package emulators with a defined background capacitance. The test results are compared with the ESD thresholds obtained by CDM tests. The CC-TLP results correlate well with the CDM data.


Application of a Normally OFF Silicon Carbide Power JFET in a Photovoltaic Inverter

Michael S. Mazzola; Robin Kelley 2009 Twenty-Fourth Annual IEEE Applied Power Electronics Conference and Exposition, 2009

Conventional wisdom that the SiC JFET is only a normally on device has recently been superseded by the first practical normally off SiC JFET. This new true enhancement mode, three-terminal, pure-SiC design provides designers with a normally off solution that retains all the benefits of the normally on SiC JFET. With only a simple change in series gate impedance, the ...


Performance predetermination of variable speed wind-driven grid connected SEIGs

Namani Rakesh; N. Kumaresan; S. Senthil Kumar; M. Subbiah 2012 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES), 2012

A Self Excited Induction Generator (SEIG) system has been proposed for supplying power to the grid through a combination of a three-phase semi- converter (SC) and a line commutated inverter. This system is capable of operating at variable speed to enable maximum power, proportional to the cube of the wind speed, to be extracted from the wind. The method of ...


Transmission line pulsed waveform shaping with microwave filters

Sopan Joshi; Elyse Rosenbaum 2003 Electrical Overstress/Electrostatic Discharge Symposium, 2003

Impedance mismatches in the standard transmission line pulsed (TLP) measurement system will severely distort the pulsed waveform, but use of matched microwave attenuating filters can transform the setup into a 50-Omega TLP system which produces near-ideal waveforms. In addition, passive, lossless low-pass filters can be used to vary the rise time of the pulse. Detailed measurement and microwave simulation results ...


More eLearning Resources

IEEE-USA E-Books

  • Metaline Antenna

    This chapter designs a line antenna where the beam scans seamlessly with change in frequency from the backward direction to the forward direction through the broadside direction. This line antenna is designated as a metamaterial¿¿¿ based line antenna or metaline and the design is performed using transmission line theory. The metaline shown in the chapter is designed as a beam¿¿¿scanning antenna, where a broadside beam is obtained across a very narrow frequency region centered at the transition frequency fT. The amplitude of the excitation at each of the points F1 and F2 is the same, with an excitation phase difference of 180¿¿. This excitation provides constructive addition of the fields radiated from the two metalines at frequencies around fT. The backward inclined radiation occurs due to the fact that the current flows with a progressive phase constant toward the arm end T; in other words, the phase delays toward the feed point F.

  • Connected Arrays

    This chapter contains sections titled: History of Connected Arrays Connected Array Principles Connected Dipole Currents Connection by Reactance Connected Array Extensions References

  • Wedges

    This chapter focuses on the scattering of time‐harmonic electromagnetic fields by wedges with infinite flat faces. It considers the limiting case of a PEC wedge, the perfectly conducting half‐plane, to illustrate the basic features of the factorization method. Electromagnetic scattering from wedges with impedance boundary conditions is studied using Mali‐uzhinets' method, which permits solutions for a number of important wedge‐shaped impedance configurations in the form of the so‐called Sommerfeld integrals. The chapter focuses on the generic high‐frequency analysis of solutions for impenetrable wedges represented by Sommerfeld integrals. In the chapter, Maxwell's equations are reduced to two independent boundary value problems for Green's functions of the Helmholtz equation in a wedge‐shaped domain with Neumann and Dirichlet boundary conditions. It discusses the correct formulation of the boundary value problem, including the edge (Meixner's) conditions and the conditions at infinity.

  • Detection and Conditioning of the Surface EMG Signal

    This chapter contains sections titled: * Introduction * Electrodes: Their Transfer Function * Electrodes: Their Impedance, Noise, and dc Voltages * Electrode Configuration, Distance, Location * EMG Front-End Amplifiers * EMG Filters: Specifications * Sampling and A/D Conversion * European Recommendations on Electrodes and Electrode Locations * References

  • Circular Cylinders and Convex Bodies

    This chapter focuses on the infinite circular cylinder, which, after planar media, is the geometry with the simplest solution. It begins with the solution for a perfectly electrically conducting (PEC) cylinder under normal illumination, continues with the case of a dielectric cylinder, and concludes with solutions for material cylinders under oblique illumination. The chapter examines the scattering from electrically thin dielectric and metal cylinders, showing in particular the possibility of anomalously strong scattering from thin cylinders with negative permittivity. Furthermore, comparing the solutions for an arbitrarily‐sized coated cylinder and an impedance cylinder helps to establish the conditions of applicability of the impedance boundary conditions on curved surfaces. By using Watson's transformation, the solution at an observation point far from the surface of the cylinder can be cast in a physically clear form in terms of incident, reflected, and creeping waves.

  • 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.

  • Current-Fed Z-Source Inverter

    This chapter presents recent topology modifications to the current-fed Z-source inverter/quasi-Z-source inverter (CF-ZSI/qZSI), its operation principles, modulation, modeling and control, passive components design guidelines, and applications. There are two types of three-phase inverters: voltage source inverter (VSI) and a current source inverter (CSI). The open- circuit state of the CF-ZSI can be used to boost the output current (voltage- buck operation) without the unwanted interruption of source current. There are many topology modifications either to overcome the drawbacks of the basic voltage-fed Z-source inverter (VF-ZSI) topology or to increase its voltage gain. Most of these topology modifications can be adjusted for the CF-ZSI. The CF-ZSI/CF-qZSI has an additional zero vector: an open-circuit switching state, which is forbidden in traditional CSI. The current stress and voltage stress of the Z-source network passive components and input inductor also need to be analyzed in order to properly design the capacitor and inductor in the circuit.

  • Spheres

    Scattering of a plane electromagnetic wave by a spherical object is perhaps the important canonical problem in electromagnetic scattering theory. The sphere serves as a model of a compact smooth scatterer and is one of only two compact geometries for which Maxwell's equations can be solved in an explicit form. An exact solution is available not only for perfectly electrically conducting (PEC) but also for material, homogeneous or radially stratified, magneto‐dielectric spheres. This chapter addresses the physical interpretation of scattering from spheres, depending on the electrical size and the degree of absorption in the material of the sphere. It applies the general solution for the far scattered field to the particular cases of two concentric spheres and their variants, including PEC, impedance, and core‐shell spheres, and describes the most important features of low‐ and high‐frequency scattering from these structures.

  • Review of Coupled Magnetic Resonance System (CMRS)

    In this chapter, the well¿¿¿known coupled magnetic resonance system (CMRS) is explained, stating that it is nothing but new and is a sort of conventional inductive power transfer system (IPTS). There are three major magnetic couplings between coils in CMRS: source¿¿¿transmitter (Tx), Tx¿¿¿receiver (Rx), and Rx¿¿¿load couplings, respectively. Except for Tx¿¿¿Rx coupling, other couplings do not directly contribute to wireless power transfer. Hence, this miscellaneous coupling can be replaced with a lumped transformer with a ferrite core. Because there is only a Tx¿¿¿Rx coupling, the CMRS becomes compact in size and robust to ambient changes. Moreover, the design of CMRS is drastically simplified without complicated multiresonance tunings due to a small magnetic flux linkage from the source coil or the load coil.Coreless coils are used for Tx and Rx coils to examine the characteristics of CMRS with lumped transformers. A detailed static analysis on the explicit circuit model of the proposed CMRS and design procedures are fully established. Experiments for 1 W and 10 W prototype CMRSs with a class¿¿¿E inverter at the switching frequency of 500 kHz, where the quality factors are less than 100, verified the usefulness of the proposed model, achieving 80% of the maximum Tx coil¿¿¿to¿¿¿load efficiency. It is concluded that the conventional CMRS, in general, is just a special form of IPTS where the quality factor is extremely high with coreless Tx and Rx coils.This chapter is based on two papers, one by B.H. Choi, E.S. Lee, J. Huh, and C.T. Rim, ¿¿¿Lumped impedance transformers for compact and robust coupled magnetic resonance systems,¿¿¿ _IEEE Trans. on Power Electronics_, vol. 30, no. 11, pp. 6046¿¿¿6056, November 2015 and the other by J. Huh, W.Y. Lee, S.Y. Choi, G.H. Cho, and C.T. Rim, ¿¿¿Frequency¿¿¿domain circuit model and analysis of coupled magnetic resonance systems,¿¿¿ _Journal of Power El ectronics_, vol. 13, no. 2, pp. 275¿¿¿286, March 2013.

  • Analysis of Arrays and Mutual Coupling

    This chapter contains sections titled: * Input Impedance and Mutual Coupling of Rectangular Microstrip Antennas * Phased Array Simulation Using Circular Patch Radiators * Finite Phased Arrays of Rectangular Microstrip Patches * Analysis of a Series-Fed Aperture-Coupled Patch Array Antenna * Performance of Probe-Fed Microstrip-Patch Element Phased Arrays * Analysis of Infinite Arrays of One- and Two-Probe-Fed Circular Patches * Modelling of Wideband Proximity Coupled Microstrip Array Elements * Scanning Characteristics of Infinite Arrays of Printed Antenna Subarrays