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Electromagnetic Compatibility (EMC), 2012 IEEE International Symposium on

Date 6-10 Aug. 2012

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Displaying Results 1 - 25 of 153
  • Welcome

    Publication Year: 2012 , Page(s): 7
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  • Symposium Committee

    Publication Year: 2012 , Page(s): 8
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  • Program

    Publication Year: 2012 , Page(s): 1 - 116
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  • Table of contents

    Publication Year: 2012 , Page(s): 1 - 19
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  • Author index

    Publication Year: 2012 , Page(s): 1 - 11
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  • [Copyright notice]

    Publication Year: 2012 , Page(s): 1
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  • Coupling interface circuit design for experimental characterization of the narrowband power line communication channel

    Publication Year: 2012 , Page(s): 1 - 6
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (426 KB) |  | HTML iconHTML  

    This paper presents the design of an appropriate coupling interface circuit for measuring indoor power line transmission channel characteristics in CENELEC/FCC/ARIB low-frequency bands. This coupling circuit prevents the powerful and damaging 50 Hz/220 V current from entering sensitive measurement equipments while allowing narrowband PLC signals reception. It also guarantees impedance matching and instruments protection from very large voltage spikes and fast transients. Tests following EN 50065-2-3 standard [1] are done to verify that the proposed coupling interface provides a high safety level and is in compliance with immunity requirements. View full abstract»

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  • Modeling of coupled TSVs in 3D ICs

    Publication Year: 2012 , Page(s): 7 - 11
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (401 KB) |  | HTML iconHTML  

    This paper presents analytical formulas to extract an equivalent circuit model for coupled through silicon via (TSV) structures in a 3D integrated circuit. We make use of a multiconductor transmission line approach to model coupled TSV structures. TSVs are embedded in a lossy silicon medium, hence they behave as metal-insulator-semiconductor (MIS) transmission lines. The models we present can accurately capture the transition between slow-wave and dielectric quasi-TEM modes, which are characteristic for MIS transmission lines, as well as the metal-oxide-semiconductor (MOS) varactor capacitance. The results are validated against 2D quasi-static simulations and 3D full-wave electromagnetic simulations. The derived equivalent circuit models can easily be applied in circuit simulators to analyze crosstalk behavior of TSVs in a 3D integrated system. View full abstract»

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  • Crosstalk and low frequency radiation in a coupled microstrip line with a top cover

    Publication Year: 2012 , Page(s): 12 - 17
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (336 KB) |  | HTML iconHTML  

    In this work we use a full-wave method to analyze the propagation characteristics of a coupled microstrip transmission line with a metallic top cover. This metallic top cover may be present in a microstrip structure due to a circuit package. We show that an even leaky mode and an improper odd mode can be excited in this structure at low frequencies. As a consequence, effects as radiation, power loss, and interference, which are usually found in microstrip transmission lines at high frequencies, appear instead in this structure at low frequencies, thus compromising the signal integrity on the line. We provide numerical results to demonstrate that signal propagation and crosstalk for this line cannot be accurately predicted by a conventional analysis based upon a quasi-TEM approximation and transmission line theory even at frequencies such that the cross section of the line is much smaller than the wavelength. View full abstract»

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  • Signal integrity design for GHz high-speed differential wires with slip ring capsule

    Publication Year: 2012 , Page(s): 18 - 21
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (564 KB) |  | HTML iconHTML  

    In order to improve the signal quality of the slip ring capsule, twisted lines are utilized to significantly reduce the reflection among the devices. By twisting the differential parallel lines, the variant differential-mode impedance on the two parallel lines with different spacings from 160 ohm to 238 ohm is improved to have stable one, which is approximately 115 ohm. The discontinuities along the differential parallel wires can be minimized and it also improves the quality of data transmission by twisting the differential lines. According to the eye diagram of measuring the slip ring capsule with twisting lines in data rate of 1 Gbps, the eye height is enlarged from 80 mV to 487 mV and the eye width is increased from 417.8 psec to 924.8 psec, respectively, as compared with the one with untwisted lines. Even if the data rate is raised to 2 Gbps, the slip ring capsule with twisted line can still have acceptable eye height and eye width, which is 241 mV and 373.6 psec, respectively. View full abstract»

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  • The Generalized ICN for 25Gbps+ channel using NRZ, PAM-M or Duobinary coding scheme

    Publication Year: 2012 , Page(s): 22 - 27
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (869 KB) |  | HTML iconHTML  

    The integrated crosstalk noise (ICN) has been proposed in the IEEE 802.3ba standard to measure the crosstalk in the high-speed channel and accepted as a replacement of the ICR (Insertion Crosstalk Ratio) for channel noise estimation. As the PHY options of NRZ, PAM-4 and/or Duobinary are actively explored for higher data rate, a generalized ICN model will be needed for characterizing the channel SI performance. This paper presents the analysis of the integrated crosstalk noise (ICN) model for 10 Gb/s NRZ coding based system and generalizes the ICN model for 25 Gb/s and beyond system adopting the NRZ, PAM-4 or Duobinary coding scheme. View full abstract»

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  • Fast admittance computation for TSV arrays

    Publication Year: 2012 , Page(s): 28 - 33
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (797 KB) |  | HTML iconHTML  

    A fast method to calculate the admittance matrix of Through Silicon Vias (TSVs) is proposed in this paper. The silicon dioxide layers are equivalently modelled using the bound charge on the conductor surfaces as well as on the dielectric interface between the silicon dioxide and the silicon regions. Unknown surface densities of both the free and bound charge are expanded using the axial harmonics. Galerkin's method is then applied to obtain the capacitance and conductance matrices. The proposed method is validated with a full-wave 2D cross-sectional analysis tool for a typical TSV pair structure. Comparisons with popular closed-form expressions are also discussed. View full abstract»

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  • On-chip magnetic resonant coupling with multi-stacked inductive coils for chip-to-chip wireless power transfer (WPT)

    Publication Year: 2012 , Page(s): 34 - 38
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1064 KB) |  | HTML iconHTML  

    In this paper, we present on-chip magnetic resonant coupling using single and multi-stacked inductive coils to enhance power transfer efficiency (PTE) of chip-to-chip wireless power transfer (WPT) system. The PTE is rigorously investigated and compared for three schemes of on-chip single and multi-stacked magnetic resonant coils. For on-chip magnetic resonant coupling, the PTE is significantly affected by an effective series resistance (ESR) of on-chip inductive coils at the transmitter and the receiver chip. It is verified through full-wave simulations that the PTE is improved by 38% using the scheme of a multi-stacked coil at both the transmitter and receiver chips, compared to the scheme of a single coil at both the transmitter and receiver chips. View full abstract»

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  • Estimation of power absorbed by human body using reverberation chamber

    Publication Year: 2012 , Page(s): 39 - 43
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (574 KB) |  | HTML iconHTML  

    A technique of estimating the whole-body averaged specific absorption rate (SAR) in a random electric field using a reverberation chamber is presented. The method we propose is based on measuring the S-parameters in the chamber unloaded and loaded with humans. Using this technique, exposure levels to humans can be low, yet the S-parameters can be used to calculate SAR for higher exposures. The SAR in a human volunteer was measured from 1 to 4 GHz. We found that SAR under conditions of random wave exposure was approximately 50% lower than that under the worst-case conditions. View full abstract»

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  • Using GTEM cells for immunity tests on electronic boards with microcontroller

    Publication Year: 2012 , Page(s): 44 - 49
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (595 KB) |  | HTML iconHTML  

    Theoretical considerations about the immunity tests within a GTEM cell are discussed. Electromagnetic field in a GTEM cell is presented. The conditions in a GTEM cell for a high degree of field uniformity according to the standard IEC/EN 61000-4-20 are discussed. The GTEM cells used for tests within the main equipment involved in the realisation of tests are presented (GTEM cell; Signal Generator/Power Meter; Field sensors; Connectors; Bi-directional Coupler; Power Amplifier; Spectrum Analyzer). The Equipment Under Test (EUT) is an electronic board containing a microcontroller, with the processor operating frequency around 40 MHz. For the immunity tests, three criteria are considered, based on standards. Methods for field calibration involved in immunity tests are discussed. The experimental determination concerning the immunity tests are presented within the main conclusions. View full abstract»

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  • Excitation of balanced modes in transmission lines using a clamping transformer

    Publication Year: 2012 , Page(s): 50 - 55
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1238 KB) |  | HTML iconHTML  

    A probe for the excitation and sensing of the differential mode on balanced transmission lines is described and characterized numerically and experimentally. The probe is designed to be insensitive to the location of the transmission line within the probe's window such that its use is similar to that of a BCI probe for common-mode injection and sensing. It is thought that such a device will be useful for measurements involving differential data busses such as the CAN bus. A numerical model is developed using the full dispersion characteristics of the ferrite core. The model is verified with measurements and good agreement is obtained between numerical simulations and experimentally measured data. As with conventional BCI probes, the ability of the ferrite core to facilitate the inductive coupling is retained even in the dispersive frequency region of ferrite. The probe geometry is such that a number of such devices can be arrayed to provide a region of uniform magnetic field illumination of a transmission line. View full abstract»

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  • Additional techniques to reduce heatsink emissions utilizing RF absorbers

    Publication Year: 2012 , Page(s): 56 - 63
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (879 KB) |  | HTML iconHTML  

    This paper compares the electromagnetic interference (EMI) reduction of several radio-frequency (RF) absorber configurations with integrated circuits (IC) and associated heatsinks. View full abstract»

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  • Small licensed transmitters and their RF exposure assessment

    Publication Year: 2012 , Page(s): 64 - 69
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (553 KB) |  | HTML iconHTML  

    Deploying small cells, i.e., small licensed transmitters, is one of the key solutions to manage the recent data explosion and network congestion. Small cells are mainly deployed in residential or enterprise environments. Therefore, they can be located in close proximity to human bodies. Their RF output power is low, usually in the range of mW to a couple of watts. This paper addresses the RF exposure compliance for small cells, including regulations, criteria and rules in United States, Canada, Australia and European Union. In addition, small cells' RF safety requirement in various countries in relation to their RF output power levels is investigated. This information would not only help the designers understand the regulatory RF exposure compliance requirements for small cells thoroughly, but also provide them with guidance in determining the proper RF transmitting power levels for small cells. As a result, less time and lower cost would be required in meeting their global regulatory RF exposure assessment requirements. View full abstract»

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  • Transfer Impedance testing of EMI gasketed joints to 10 GHz for cost effective design

    Publication Year: 2012 , Page(s): 70 - 73
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2038 KB) |  | HTML iconHTML  

    There are presently two (2) methods used by industry to grade the ability of EMI gaskets to seal seams in the chassis used to house Electronic equipment. These are the “Shielding Effectiveness” test method contained in MIL-DTL-83528 and the “Transfer Impedance” test method contained in SAE, ARP-1705. This paper describes (1) the development of the two methods for testing gaskets; (2) the faults and advantages of the two methods, (3) provides mathematical equations that can be used to predict the actual shielding obtained from a gasketed maintenance cover as a function of the transfer impedance of the gasketed cover; (4) illustrations that show that the shielding obtained from a gasket is a function of the joint surfaces as well as the conductivity of the gasket; (5) the effects a moisture soak has on the shielding offered by gasketed joints; and (6) the effect the storage in an office environment can have on the conductivity of a silver elastomeric gasket. View full abstract»

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  • Permeability and permittivity uncertainty effects in modeling absorbing coatings and ferrites on cables

    Publication Year: 2012 , Page(s): 74 - 79
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1447 KB) |  | HTML iconHTML  

    Sensitivity analysis of the performance of thin absorbing coatings and ferrite chokes on cables to the variation in dielectric and magnetic properties of materials is carried out. This variation corresponds to possible uncertainty in measuring complex permittivity and permeability of materials. The analysis in this paper is done numerically using the 2D-FEM code. The modeled parameters are input impedance and EMI radiation reduction when applying absorbing materials and ferrite chokes on the cables, represented as monopole antenna rods. The material parameters of absorbing materials and ferrites used in this study were measured using the standard 7-mm coaxial air line. Higher sensitivity of the modeled parameters to the uncertainty of measuring complex permeability of absorbing materials and ferrites, and lower to the uncertainty of measuring complex permittivity, even in the case of high-permittivity absorbing coatings, have been demonstrated. View full abstract»

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  • Prediction of common-mode current reduction using ferrites in systems with cable harnesses

    Publication Year: 2012 , Page(s): 80 - 84
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (638 KB) |  | HTML iconHTML  

    Bulk ferrite chokes are widely used to reduce common-mode (CM) currents on system harnesses. The impact of the ferrite on the CM currents depends on a variety of factors and is difficult to predict. A simple closed-form analytical model of the CM impedance of the ferrite that allows efficient evaluation of the impact of the ferrite is considered. In order to apply this model to a real active power system with cable harnesses, information about the system's CM loop impedance is measured using the minimally-invasive dual current clamp method. The predicted impact of the ferrite on the CM loop impedance of the system and the CM currents on the harness showed reasonable agreement with measurements in both a simple passive test setup and in a real active system. View full abstract»

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  • Conductive concrete as an electromagnetic shield

    Publication Year: 2012 , Page(s): 85 - 87
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (847 KB) |  | HTML iconHTML  

    Conductive concrete mixture was originally developed for surface de-icing purposes but can be designed to perform as an electromagnetic shield. Testing procedures have been developed to measure the attenuation provided by conductive concrete without the cost and labor of building a large structure. This paper provides a description of the design, testing methods, and results obtained from the development of conductive concrete as an electromagnetic shielding material. View full abstract»

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  • Substation switching electromagnetic transient analysis using the time domain integral equation with a high order implicit scheme

    Publication Year: 2012 , Page(s): 88 - 92
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (546 KB) |  | HTML iconHTML  

    A fast electric field integral in time domain using the uneven discretization and the implicit scheme is proposed to calculate the switching electromagnetic transient at a substation. The switching transient currents and the resultant radiated electromagnetic field are calculated. The propose d approach has the strength to model the bus system at a substation with a more complicated and realistic configuration that is difficult to simulate using the circuit-based method, because all the electromagnetic couplings within the bus system are included globally. The proposed method might be one of good candidates to predicate the EMI level at a substation. View full abstract»

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  • Lightning transient suppression circuit design for avionics equipment

    Publication Year: 2012 , Page(s): 93 - 98
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (495 KB) |  | HTML iconHTML  

    Aircraft manufacturers are increasingly choosing to use Carbon Composite material for the design of their airframes due to its obvious advantage of reducing the weight of the aircraft. However, a disadvantage of this decision is the large increase in the lightning indirect effect levels to which avionics equipment are exposed. The typical method of protecting avionic interfaces from these transients is to clamp the transient using a suppression device such as: metal oxide varistors (MOV), transient voltage suppressors (TVS), or gas discharge tubes (GDT). Higher transient levels typically results in larger components, but aircraft manufacturers demand that the avionics equipment does not increase in physical size. This presents a major challenge to avionics manufacturers. This paper presents some techniques used to meet this challenge. View full abstract»

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  • Effect on lightning electromagnetic fields from the return-stroke parameters

    Publication Year: 2012 , Page(s): 99 - 102
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (584 KB) |  | HTML iconHTML  

    Choice of the return-stroke parameters has a great influence on the calculation results of lightning electromagnetic pulse(LEMP) fields. In this paper, LEMP fields under different return-stroke parameters are calculated based on the MTLL model in which the channel-base current is described by a pulse function. And effect of different return-stroke speeds and channel heights on LEMP fields of different field regions are also discussed. The results show that the lightning channel height between 1 kilometre and a few tens of kilometres has a little influence on the LEMP fields, but the return-stroke speed has a distinct influence on the LEMP fields. View full abstract»

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