By Topic

Electromagnetic Compatibility Magazine, IEEE

Issue 4 • Date 4th Quarter 2013

Filter Results

Displaying Results 1 - 25 of 40
  • [Front cover]

    Page(s): c1
    Save to Project icon | Request Permissions | PDF file iconPDF (2452 KB)  
    Freely Available from IEEE
  • Contents

    Page(s): 3
    Save to Project icon | Request Permissions | PDF file iconPDF (3424 KB)  
    Freely Available from IEEE
  • Letter from the editor

    Page(s): 4 - 8
    Save to Project icon | Request Permissions | PDF file iconPDF (4420 KB)  
    Freely Available from IEEE
  • President's message

    Page(s): 6 - 7
    Save to Project icon | Request Permissions | PDF file iconPDF (3645 KB)  
    Freely Available from IEEE
  • Chapter Chatter

    Page(s): 10 - 27
    Save to Project icon | Request Permissions | PDF file iconPDF (30910 KB)  
    Freely Available from IEEE
  • EMC personality profile

    Page(s): 28 - 29
    Save to Project icon | Request Permissions | PDF file iconPDF (2486 KB)  
    Freely Available from IEEE
  • EMC Society history

    Page(s): 30
    Save to Project icon | Request Permissions | PDF file iconPDF (849 KB)  
    Freely Available from IEEE
  • The life and times of Joseph F. Fischer

    Page(s): 30 - 31
    Save to Project icon | Request Permissions | PDF file iconPDF (857 KB)  
    Freely Available from IEEE
  • Your papers are worth saving

    Page(s): 31 - 35
    Save to Project icon | Request Permissions | PDF file iconPDF (3643 KB)  
    Freely Available from IEEE
  • 50-25-10 Years ago: A review of EMC Society newsletters

    Page(s): 35 - 37
    Save to Project icon | Request Permissions | PDF file iconPDF (1730 KB)  
    Freely Available from IEEE
  • Quasies and peaks

    Page(s): 37 - 41
    Save to Project icon | Request Permissions | PDF file iconPDF (1534 KB)  
    Freely Available from IEEE
  • Completed careers [Obituaries]

    Page(s): 44 - 46
    Save to Project icon | Request Permissions | PDF file iconPDF (2023 KB)  
    Freely Available from IEEE
  • Thank you to our sponsors

    Page(s): 1
    Save to Project icon | Request Permissions | PDF file iconPDF (5553 KB)  
    Freely Available from IEEE
  • Book review: Design and modeling for 3D ICs and interposers

    Page(s): 48 - 49
    Save to Project icon | Request Permissions | PDF file iconPDF (2866 KB)  
    Freely Available from IEEE
  • Practical papers, articles and application notes

    Page(s): 51
    Save to Project icon | Request Permissions | PDF file iconPDF (816 KB)  
    Freely Available from IEEE
  • Elementary and ideal equivalent circuit model of the 1, 2/50-8/20 μs combination wave generator

    Page(s): 51 - 57
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (5241 KB)  

    The values of the parameters of the equivalent circuit model of the combination wave (surge) generator, which appears in the standard IEC 61000-4-5, are here derived so that open-circuit voltage and short-circuit current exactly meet the standard waveform requirements in terms of peak amplitude, front-time and duration. The time-domain expressions of the voltage and current waveforms are obtained in closed-form. The new verification procedure set in the draft edition 3 of the standard, that involves the use of an 18 μF capacitor, is discussed, and the aspects relevant to the design of the generator are analyzed. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Measurement and modeling of electromagnetic noise from LED light bulbs

    Page(s): 58 - 66
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (4775 KB) |  | HTML iconHTML  

    The characteristics of broadband noise radiated by LED light bulbs were investigated. According to the measurement results of the noise waveform in the time domain, LED noise can be categorized as intermittent type or non-intermittent type, in accordance with the operation of the switching power supply installed in the LED bulb. Intermittent-type noise is emitted by some LEDs supporting dimmer operation, and its repetitive bursts are synchronized with the AC mains frequency. For both types, the noise is a sequence of short pulses, each of which is generated at the instant that the power-supply circuit of the LED bulb is switched on or off. Hence, an "on pulse" and an "off pulse" are alternatively emitted. The interval of the pulses varies with time in general. A time-domain noise model representing the time-varying pulse interval and amplitude was developed by applying amplitude and frequency modulations to a regularly repetitive pulse train. As a statistical property of LED noise, amplitude probability distribution (APD) was also measured with various resolution bandwidths of the receiver. When the bandwidth was larger than the switching frequency of the power supply, Middleton's class-A model gave a good approximation of the APD. For narrower reception bandwidths down to 1 kHz, the noise can be regarded as Gaussian for non-intermittent type or intermittent Gaussian for intermittent type, respectively. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • A simple approach of generating CPWM for reducing conducted emission in switched mode power supplies

    Page(s): 67 - 71
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (3817 KB) |  | HTML iconHTML  

    In this work, the problem of improving the performance of switched mode power supply (SMPS) by reducing the electromagnetic interference (EMI) using simplified chaotic pulse width modulation (CPWM) generation method is addressed. The key is the generation of CPWM by modulating chaotic pulse position modulation (CPPM) and PWM. The advantage of the scheme is the simplicity and the easy implementation in the feedback path of the converter without the need of any huge external chaotic generator circuit. The proposed method is found to be effective in reducing the peak EMI in SMPS. The effectiveness of the proposed method on spreading those dominating frequencies, compared to the conventional PWM scheme is evaluated by spectral analysis. Finally, levels of conductive EMI are experimentally verified to comply with the CISPR 22 regulations. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • COMAR finding on radiofrequency safety and utility smart meters

    Page(s): 71
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (951 KB) |  | HTML iconHTML  

    This Technical Information Statement describes Smart Meter technology as used with modern electric power metering systems and focuses on the radio frequency (RF) emissions associatedwith their operation relative to human RF exposure limits. Smart Meters typically employ lowpower (~1 W or less) transmitters that wirelessly send electric energy usage data to the utilitycompany several times per day in the form of brief, pulsed emissions in the unlicensed frequencybands of 902??928 MHz and 2.4??2.48 GHz or on other nearby frequencies. Most Smart Metersoperate as wireless mesh networks where each Smart Meter can communicate with otherneighboring meters to relay data to a data collection point in the region. This communicationprocess includes RF emissions from Smart Meters representing energy usage as well as therelaying of data from other meters and emissions associated with maintaining the meter'shierarchy within the wireless network. As a consequence, most Smart Meters emit RF pulsesthroughout the day, more at certain times and less at others. However, the duty cycle associatedwith all of these emissions is very small, typically less than 1%, and most of the time far lessthan 1%, meaning that most Smart Meters actually transmit RF fields for only a few minutes perday at most. The low peak power of Smart Meters and the very low duty cycles lead to the factthat accessible RF fields near Smart Meters are far below both U.S. and international RF safe-tylimits whether judged on the basis of instantaneous peak power densities or time-averaged exposures. This conclusion holds for Smart Meters alone or installed in large banks of meters. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Signal integrity

    Page(s): 72
    Save to Project icon | Request Permissions | PDF file iconPDF (804 KB)  
    Freely Available from IEEE
  • Selection and placement of decoupling capacitors in high speed systems

    Page(s): 72 - 78
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (2755 KB) |  | HTML iconHTML  

    The Power Integrity problem for high speed systems is discussed in context of selection and placement of decoupling capacitors. Power Integrity is maintained by damping the cavity mode peaks at resonant frequencies using decoupling capacitors. This article focuses on damping cavity mode effects in power delivery networks by the particle swarm optimization technique. The s-parameter data of power plane geometry and capacitors are used for the accurate analysis including bulk capacitors and VRM, for a real world problem. The optimal capacitors and their locations on the board are found using the presented methodology, which can be used for similar power delivery networks in high speed systems. View full abstract»

    Full text access may be available. Click article title to sign in or learn about subscription options.
  • Smart grid EMC standards harmonization

    Page(s): 79 - 82
    Save to Project icon | Request Permissions | PDF file iconPDF (4806 KB)  
    Freely Available from IEEE
  • EMC Society board of directors meeting

    Page(s): 84 - 90
    Save to Project icon | Request Permissions | PDF file iconPDF (7209 KB)  
    Freely Available from IEEE
  • New members of the EMC Society board of directors announced!

    Page(s): 91
    Save to Project icon | Request Permissions | PDF file iconPDF (771 KB)  
    Freely Available from IEEE
  • EMC Society President's memorial scholarship fund

    Page(s): 91
    Save to Project icon | Request Permissions | PDF file iconPDF (771 KB)  
    Freely Available from IEEE

Aims & Scope

The IEEE Electromagnetic Compatibility Magazine informs readers of activity in the EMC Society and educate members via practical technical papers and design tips.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Janet Nichols O’Neil
ETS-Lindgren