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Electromagnetic Compatibility (EMC), 2010 IEEE International Symposium on

Date 25-30 July 2010

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Displaying Results 1 - 25 of 168
  • Chairman's message

    Publication Year: 2010 , Page(s): 1
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  • Committee

    Publication Year: 2010 , Page(s): 1 - 2
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  • Program

    Publication Year: 2010 , Page(s): 1 - 100
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  • Table of contents - workshops and tutorials

    Publication Year: 2010 , Page(s): 1 - 14
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  • Table of contents - technical papers

    Publication Year: 2010 , Page(s): 1 - 44
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  • Author index

    Publication Year: 2010 , Page(s): 1 - 12
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  • [Copyright notice]

    Publication Year: 2010 , Page(s): 1
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  • Measurement of differential mode propagation in printed circuit board for satellites applications

    Publication Year: 2010 , Page(s): 1 - 5
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1041 KB) |  | HTML iconHTML  

    This work deals with a test procedure for EMC/SI measurements on artificial satellites for telecommunication applications. This work proposes a fast method to compare the effects of different test setups for the measurement of conducted emissions and introduces a different test setup for this category of EUT. View full abstract»

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  • Analysis of return path discontinuities in multilayer PCBs and their impact on the signal and power integrity

    Publication Year: 2010 , Page(s): 6 - 11
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (947 KB) |  | HTML iconHTML  

    This paper investigates the impact of return path discontinuities on both signal and power integrity of high speed interconnects. A test board is built for the purpose and 4 different configurations are analyzed and correlation between measurements and simulations (coming from a full wave 3D EM field simulator) results is also presented. Both time and frequency domain results are analyzed and design guidelines are provided. It is observed that return path discontinuities have a sensible impact on ground bounce in single-ended signals; however the differential signaling can drastically reduces it. Discontinuities from gaps in return paths (e.g. plane splits) and connectors impact the differential signals on both insertion loss and cross talk. The real value of return/grounding vias is to reduce the common signal noise. View full abstract»

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  • A new common-mode EMI suppression technique for GHz differential signals crossing slotted reference planes

    Publication Year: 2010 , Page(s): 12 - 15
    Cited by:  Papers (1)  |  Patents (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (566 KB) |  | HTML iconHTML  

    Based on a pair of symmetric quarter-wavelength stubs parallel connected to the slot line, a new low-cost technique for suppressing the common-mode electromagnetic interference (EMI) is proposed for high-speed differential signals crossing slotted ground planes. The quarter-wavelength resonator can provide a shorting path for return current around the resonance frequency of the stubs, which avoids common-mode noise to become the excitation source of the slot. To validate this idea, a test sample with using the proposed technique and a reference board without the solution are fabricated. The experimental and numerical results show the radiated energy due to the common-mode noise can be significantly reduced in broadband frequencies by using the propose resonators. The magnitude of common-mode EMI at 3 meter can be suppressed more than 5 dB at the frequency range from 2.1 GHz to 3.5 GHz, and even 10 dB during the frequency range of 2.4 GHz to 3.25 GHz. View full abstract»

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  • A guide for selecting and designing your method to measure NSA

    Publication Year: 2010 , Page(s): 16 - 21
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    This paper compares different methods of performing Normalized Site Attenuation. All of these methods can be used in labs today, and are compliant with published standards. Each method has advantages and disadvantages which, if understood, can help labs improve their systems or show compliance with the standard requirements. View full abstract»

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  • Near-field coupling model between electronic systems and a transmission line

    Publication Year: 2010 , Page(s): 22 - 27
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1057 KB) |  | HTML iconHTML  

    This paper presents an analysis of radiated electromagnetic disturbances between electronic devices (parasitic emission source) and a transmission line. The study aims to model the coupling and for this purpose, two concepts are combined: the emission source is modelled by an array of elementary dipoles (electric and magnetic) and the induced voltage in the transmission line is calculated from the equivalent sources radiation by two different approaches. The first one is totally analytical and is based on the transmission line theory and Taylor model. The second one uses the insertion of equivalent sources into an electromagnetic simulation tool. To validate our model we apply it for two cases: a passive system and an active one disturbing a transmission line. View full abstract»

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  • Suppression of power/ground noise using meshed-planar electromagnetic bandgap (MP-EBG) structure for Ultra-Wideband (UWB) System-in-Package (SiP)

    Publication Year: 2010 , Page(s): 28 - 31
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (573 KB) |  | HTML iconHTML  

    In this paper, we propose the meshed-planar electromagnetic bandgap (MP-EBG) structure with a meshed planar surface embedded in the package power plane to suppress a power/ground noise in the frequency range from 3.1 GHz to 10.6 GHz, also known as the frequency band of Ultra-Wideband (UWB). The MP-EBG structure has two different EBG surfaces. One surface is a mushroom-like surface embedded between a package power and a ground plane and the other surface is a meshed planar structure embedded in a package power plane. The MP-EBG structure enables to enhance the bandwidth of the stopband in the limited package area and achieve the 8.7 GHz stop bandwidth with -30 dB isolation. View full abstract»

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  • Design and evaluation of a novel AC line filter “Pentaleads®” having quasi-distributed constant structure

    Publication Year: 2010 , Page(s): 32 - 35
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (451 KB) |  | HTML iconHTML  

    A novel common-mode AC line filter "Pentaleads®" having five leads including an extra lead for grounding was developed. In order to realize an effective insertion loss in wide frequency range without using Y-capacitors, simple and unique quasi-distributed constant structure was adopted. The novel filter shows broad-band attenuation characteristics beyond 10 MHz which is nearly equal to a filter circuit consisted of a conventional line filter with Y capacitors of 3300 pF. The novel filter enables not only realizing its attenuation characteristics broad, but also extremely low leakage current which is approximately only 1/20 of that of an equivalent LC structured filter. View full abstract»

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  • Estimating radiated emissions from printed circuit boards and cables inside EMC chambers

    Publication Year: 2010 , Page(s): 36 - 39
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (276 KB) |  | HTML iconHTML  

    This paper presents a new approach to modelling radiated emissions from electronic systems inside EMC compliance chambers. The proposed approach exploits the fact that manufacturers prefer reusing circuits/layouts in new products with minor geometrical modifications to the existing designs. The available data from previous EMC testing, therefore, may contain certain features/patterns that may be extracted and employed to predict EMC performance of similar products. Motivated by this observation, the proposed method develops accurate models for radiated emissions inside the EMC testing environment. Specifically, radiated emissions from various geometrical configurations of a PCB-cable structure are employed to develop artificial neural network models. These developed models are tested to predict radiated emissions from a given PCB-cable structure configuration. Results show that very accurate estimates of the radiated emissions can be made using the developed models without requiring the time-consuming simulations and expensive prototype testing in the compliance chambers. View full abstract»

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  • A study of the use of a low order reverberation chamber for shielding measurements

    Publication Year: 2010 , Page(s): 40 - 44
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (761 KB) |  | HTML iconHTML  

    The benefits of using the more stir paddle in a reverberation chamber at low frequencies to enhance the dynamic range available for shielding measurements were studied room, show a number of deep nulls in the frequency response. The use of the paddles was seen to change the room geometry sufficiently to vary the match of the antennas and so minimize these nulls. View full abstract»

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  • The effect of a horizontally stratified ground on lightning electromagnetic fields

    Publication Year: 2010 , Page(s): 45 - 50
    Cited by:  Papers (3)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1845 KB) |  | HTML iconHTML  

    This paper proposes a formulation for the evaluation of the lightning electromagnetic fields in presence of a horizontally stratified soil. The formulation is based on a suitable mathematical modification of the Sommerfeld's exact formulas for the case of a homogeneous ground, in order to account for the dependence of the ground conductivity and permittivity on the vertical coordinate. Numerical simulations are presented to analyse the influence of the soil stratification on the above-ground lightning electromagnetic field components. The results obtained for a two-layered ground configuration are compared with those related to a homogeneous soil. View full abstract»

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  • Influence of antenna pattern on site validation above 1 GHz for Site VSWR measurements

    Publication Year: 2010 , Page(s): 51 - 55
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    With the experience of dozens of site VSWR validation measurements in SAC's and FAR's, special attention should be focused on the influence of the receiving antenna. Since the radiation pattern is determined in the standard and the used antennas (POD16 & POD618) are verified by measurements, the characteristic of the available receive antennas were investigated in detail at the band limits (1 GHz, 6 GHz, 18 GHz). The radiation pattern will be presented and analysed regarding the influence on site VSWR and measurement uncertainty. Also, the influences of coupling effects between receive antennas and masts were analysed during site VSWR testing. View full abstract»

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  • A reference antenna method for non-resonant electrically short monopole antennas

    Publication Year: 2010 , Page(s): 56 - 61
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1843 KB) |  | HTML iconHTML  

    In order to measure the electric field strength in low-frequency bands, monopole antennas are generally used. When carrying out EMI measurements, the antenna factor is an important and well-known characteristic. Generally, absolute calibration methods are commonly used for monopole antenna calibrations. However, establishing and keeping the traceability to standard quantities in absolute calibration methods are time consuming. In this paper, a new reference antenna method for non-resonant electrically short monopole antennas is proposed and investigated through a numerical simulation. Since the target frequency band is less than 30 MHz, the monopole antennas work as electrically short monopole antennas. The measurements are performed under the near-field condition. The results show that the proposed reference antenna method is available and effective in obtaining the antenna factor of a non-resonant electrically short monopole antenna. View full abstract»

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  • Aperture coupling near-field cavity effects for electromagnetic testing with measurements on a slotted circular cylinder

    Publication Year: 2010 , Page(s): 62 - 66
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1064 KB) |  | HTML iconHTML  

    Electric field measurements for an electromagnetic wave excited from a log-periodic dipole array at two separation distances on a finite slotted circular cylinder are compared to an analytical model of a plane wave on an infinite slotted circular cylinder. The four foot diameter cylinder cross section is used to represent the cross section (1/2 scale) of an Army Blackhawk helicopter. The frequency range of interest is in the Very High Frequency (VHF) band where the first resonances of the cavity occur. Transverse Magnetic (TM) and Transverse Electric (TE) polarizations are considered. View full abstract»

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  • Impact of PCB design on switching noise and EMI of synchronous DC-DC buck converter

    Publication Year: 2010 , Page(s): 67 - 71
    Cited by:  Papers (5)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (794 KB) |  | HTML iconHTML  

    Synchronous DC-DC buck converters operate under a few MHz but generate broadband noise up to GHz range due to its switching operation. The noise causes EMI problem through radiation and switching noise at the converter output from direct conduction. To control EMI and switching noise at the converter output, proper PCB design plays a critical role. This paper evaluates three types of GND plane layout and three types of high-voltage AC node layout for synchronous DC-DC buck converter test benches with 4-layer stack-up PCB. Transverse electromagnetic (TEM) cell measurement and time-domain measurement of switching noise at the converters output were performed for the evaluation. The source of EMI, switching noise and magnitude difference over layouts were analyzed by the impedance measurement on the test benches. View full abstract»

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  • Switching voltage regulator noise coupling to signal lines in a server system

    Publication Year: 2010 , Page(s): 72 - 78
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1215 KB) |  | HTML iconHTML  

    This paper studies a real-world signal Integrity problem due to switching voltage-regulator (VR) noise coupling in a multi-processor server system. The fast switching of the VR FETs causes significant performance degradation on signal lines in proximity. The major source of the degradation is the high di/dt noise induced by FETs switching. The coupling mechanism is mutual inductive coupling between the VR transient current loop and the loop of differential signal pair. Solutions were identified by decreasing di/dt of the aggressor and optimizing component layout to reduce mutual inductance. General VR design methodology improvements are also discussed to address signal integrity concerns. View full abstract»

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  • Investigation of noise coupling from switching power supply to signal nets

    Publication Year: 2010 , Page(s): 79 - 84
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (887 KB) |  | HTML iconHTML  

    Noise coupled from switched-mode power supply to signal nets can cause severe signal integrity problems because of the existence of fast switching voltages and currents in the circuit. In this paper, noise coupling mechanism from a synchronous buck converter to a nearby signal trace is studied using a hybrid non-linear model, which combines the synchronous buck converter circuit model and the passive electromagnetic model of the PCB coupling. General design guidelines to mitigate the noise coupling in practical printed circuit board (PCB) designs are provided based on the modeling results. View full abstract»

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  • High-resolution propagation measurements using biconical antennas and signal processing

    Publication Year: 2010 , Page(s): 85 - 90
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (883 KB) |  | HTML iconHTML  

    This paper describes how commercially-available EMC biconical antennas can be used to perform high-resolution propagation measurements. A measurement procedure and signal processing sequence is described that greatly improves the range resolution and fidelity of transmission measurements using a pair of biconical antennas. Measurement results are provided for a number of different scenarios both indoors and outdoors. Direct comparisons are also provided with the Numerical Electromagnetics Code (NEC). The results obtained so far look quite promising and demonstrate the viability of the approach. View full abstract»

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  • Filter technology for spectrum management

    Publication Year: 2010 , Page(s): 91 - 96
    Cited by:  Papers (2)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1478 KB) |  | HTML iconHTML  

    Some recent developments in filter technology at the Naval Research Laboratory will be described and the application of these technologies to spectrum management will be discussed. View full abstract»

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