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Proceedings of the International Conference on Electromagnetic Interference and Compatibility

6-8 Dec. 1999

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Displaying Results 1 - 25 of 107
  • Reduction of EMI from SMPS (switched mode power supplies) by resonance technique and its utilities in industrial process control instruments

    Publication Year: 1999, Page(s):445 - 448
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (200 KB)

    EMI restricts automation of the process control industries. A method of solving EMI problems by using a SMPS power supply and resonating it at high frequency is described. At the same time use of resonance mode SMPS helps by provide advantages of higher efficiency (95%), less heat dissipation, reliability of operation and compactness. This paper is the outcome during development and maintenance of... View full abstract»

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  • EMC standardization

    Publication Year: 1999, Page(s):296 - 299
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (256 KB)

    The paper briefly touches upon the importance of the EU Directive on EMC and its impact on Indian industry and trade. The paper discusses standardization approach in EMC and reviews standardization efforts at international, regional and national level in the area of EMC. The paper highlights salient recommendations of the DOE committee on EMC recommending enactment of a suitable legislation in Ind... View full abstract»

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  • Noise reduction in computer process synchronisation

    Publication Year: 1999, Page(s):443 - 444
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (96 KB)

    This article describes how to gain a noise tolerable computer process synchronisation (e.g. a mutual exclusion problem in a real time system). The algorithm ensures the avoidance of busy wait for processes while sharing common resources such as disk drive, floating-point processor etc., without using any hardware fixes to control noise/EM disturbances. This software technique is a very useful tool... View full abstract»

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  • A practical approach to ISO 9000 certification for EMC services

    Publication Year: 1999, Page(s):291 - 295
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (284 KB)

    ISO 9000 is a series of standards developed by International Organisation for Standardisation (ISO) that document, structure, account for and trace products and services produced/offered by an organisation. The real life situation has been discussed in this paper emphasising on practical approach for ISO 9000 implementation and certification process for EMC services. This paper also describes/list... View full abstract»

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  • Overvoltage transient protection network design

    Publication Year: 1999, Page(s):439 - 442
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (160 KB)

    Transient over-voltages caused by lightning, couples on to data communication or instrumentation signal lines and introduce serious fault alarm conditions and damage instrumentation electronics. Protection circuits to minimise the transient over-voltage are commercially available for variety of installation requirements. However, if an electronic system designer intend to build a protection circui... View full abstract»

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  • EMC and antenna measurements of digital mobile telephones

    Publication Year: 1999, Page(s):315 - 317
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (216 KB)

    Digital mobile telephones have to be tested on EMC emission and immunity. In Europe the ETSI product family standards define the test methods and limits for these measurements. Very often the manufacturer is also interested in the antenna characteristics of the mobile telephone. Therefore the question arises, how far an existing EMC test facility can be used for additional antenna measurements. A ... View full abstract»

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  • Configurations of intense pulse power systems for generation of intense electromagnetic pulses

    Publication Year: 1999, Page(s):471 - 478
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (692 KB)

    This article discusses briefly the characteristics of intense electromagnetic pulses (EMP) vis NEMP, SGEMP and IIPM vis-a-vis their vulnerable effects on electronics systems and protection technology involving electromagnetic shielding and fast surge suppressors. The salient features of intense EMP simulators for the laboratory testing of electronics systems are also covered. Intense pulse power s... View full abstract»

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  • Calibration of broadband antenna and confirmation through measurement at a 10 m site. A case study

    Publication Year: 1999, Page(s):285 - 290
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (236 KB)

    Broadband antennas like logperiodic and biconical antennas are used to receive radiated emissions from equipment under test for frequency range 30 MHz to 1000 MHz. This paper presents a case of calibration of antenna factors of 2 sets of broadband antennas (biconical and logperiodic antennas) and 1 set of tunable dipole antennas and their confirmation through measurement of site attenuation of 10 ... View full abstract»

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  • Leadless devices for EMI suppression

    Publication Year: 1999, Page(s):343 - 356
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (1084 KB)

    Electromagnetic interference by unwanted signals/noise and electrostatic discharge, electromagnetic induction, thunder/lightening etc. has come in to focus due to the malfunctioning of sophisticated control, test, measurement and a host of other systems resulting in serious consequences. The drive towards miniaturization and lower power consumption in portable electronic equipment is driving towar... View full abstract»

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  • Sensitivity analysis of the cross-talk in microstrip transmission lines

    Publication Year: 1999, Page(s):129 - 132
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (204 KB)

    This paper concentrates on the phenomena of cross-talk that takes place in the densely packed microstrip transmission line like structures encountered in VLSI systems. A sensitivity analysis is performed for the normalized inter-layer unbalanced cross-talk voltage with respect to all the dimensional parameters on which it depends and the corresponding sensitivity curves plotted. Based on the calcu... View full abstract»

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  • Theoretical evaluation of resonant frequencies of a hemispherical-circular microstrip antenna

    Publication Year: 1999, Page(s):435 - 438
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (168 KB)

    We present a novel and simple method of deducing the resonant frequencies for a circular patch antenna mounted on a sphere. A particular case in this class of antenna namely hemispherical-circular antenna (θ=90 deg.) is investigated. It is shown that dominant mode resonance is tuned up in frequency by approximately 20%. The validity of this method is also evaluated. This class of MSA can be ... View full abstract»

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  • Conducted EMI analysis. A case study

    Publication Year: 1999, Page(s):181 - 186
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (392 KB)

    Commercial international regulations/standards call for specific impulsive bandwidths to measure types of emission in the frequency range of interest. Such bandwidths are specified in International Special Committee on Radio Interference (CISPR) specification no. 16-1. When emissions exceed average regulatory limits, but remain below quasi-peak limits, average analysis is carried out. Averaging of... View full abstract»

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  • Importance of EMC education

    Publication Year: 1999, Page(s):160 - 167
    Cited by:  Papers (1)
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (580 KB)

    This paper summarises the strategy of EMC education in India and abroad. A formal EMC educational course basically includes a broad comprehensive introduction to electromagnetic interference (EMI) problems and their hardening and analysis techniques, computational electromagnetics, methods of EMI measurement and various standards and specifications used in the international levels, as well as inst... View full abstract»

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  • Magnetic resonance imaging (MRI): effects of electro-magnetic radiation and safety aspects

    Publication Year: 1999, Page(s):469 - 470
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (168 KB)

    Magnetic resonance imaging (MRI) is a widely used noninvasive imaging modality for obtaining diagnostic radiological images. An MRI scanner consists of several diverse technological components such as powerful static magnetic field, rapidly varying local gradient magnetic fields, pulsed radiofrequency (RF) field and liquid helium and/or liquid nitrogen. At present, there is no conclusive evidence ... View full abstract»

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  • EMC evaluation of a new induction equipment. A case study

    Publication Year: 1999, Page(s):201 - 204
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (224 KB)

    With the growing density of electrical and electronic systems onboard contemporary naval platforms, electromagnetic interference and compatibility aspects have acquired matters of great significance. A large number of equipment, emitting signals over a wide range of the electromagnetic spectrum, have to co-exist with sensitive surveillance systems covering the very same spectrum onboard a warship ... View full abstract»

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  • A technical note on modular micro wave/millimeter wave EMS test kit in 1-40 GHz frequency range

    Publication Year: 1999, Page(s):280 - 284
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (252 KB)

    Electromagnetic susceptibility (EMS) test set up design for 1-40 GHz is very expensive and complicated exercise to build the test system with number of hardware units such as frequency agile sources, power amplifiers, antennas and so on. Both system designers and EMC test centers largely depend on the big and expensive capital test facilities to carry out these evaluations. A cost effective semi a... View full abstract»

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  • Error analysis in surface transfer impedance measurements on shielded cables

    Publication Year: 1999, Page(s):126 - 128
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (140 KB)

    This paper describes, with experimental data and graphs, errors in the surface transfer impedance (STI) measurements that could resulted from different input power levels applied to the test cable. It also describes the causes of the errors due to other reasons and how they could be avoided. It concludes by justifying the appropriate input power level to be used while using this particular standar... View full abstract»

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  • A CAD methodology for ultra-sharp roll-off elliptic band-stop filter for suppression of adjacent channel interference

    Publication Year: 1999, Page(s):431 - 434
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (164 KB)

    A CAD oriented approach for synthesis of passive elliptic filters is outlined. A combination of various techniques leads to a simple user friendly algorithm which can help in designing very high orders of such filters. Also presented is the computer simulation of a typical 9th degree filter which gives a 70 dB attenuation of fc/f ratio of 1.1. A bandstop filter is designed wi... View full abstract»

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  • Guidelines for EMC laboratory accreditation

    Publication Year: 1999, Page(s):309 - 312
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (248 KB)

    NABL (National Accreditation Board for Test and Calibration Laboratories) has already issued NABL-101 Acceptance criteria for accrediting test laboratories. This is based on International Standard ISO/IEC Guide 25. Further there are separate guidelines issued for specialised areas like biological and radiological laboratories. However, the EMC laboratory is being assessed along with any other test... View full abstract»

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  • Firmware dependency of EMC performance

    Publication Year: 1999, Page(s):177 - 180
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (252 KB)

    Performance of an electronic system is generally believed to be a function of components, circuit layout and enclosure design, i.e. hardware dependent. But this is not entirely valid for embedded systems. For such systems, in addition to hardware factors, design of firmware also impacts EMC performance of the system. This paper examines such firmware dependencies of system EMC performance and offe... View full abstract»

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  • Generation of magnetic and electric field measurement and its analysis

    Publication Year: 1999, Page(s):219 - 224
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (284 KB)

    With the proliferation of modern electronics circuits design concept, it has been found that it becomes more complex and operates in low frequency to high frequency. Consequently due to electronic component design and PCB layout and interconnection, some equipment generates an appreciable amount of magnetic field and electric field. To obtain its nature, level, and frequency component, it is neces... View full abstract»

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  • Intelligence management of EMC control

    Publication Year: 1999, Page(s):156 - 159
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (284 KB)

    With the advent of the computer and fifty years of research into artificial intelligence programming techniques, the dream of smart machines has become a reality. The emphasis is not merely to process large quantities of data but rather to extract meaningful information from this data. Knowledge is stored in database and wisdom is used to make decisions. The key of success is our ability to associ... View full abstract»

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  • Impact of magnetic field on biological function and suppression technique

    Publication Year: 1999, Page(s):465 - 468
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (204 KB)

    Due to the ever increasing amount of modern equipment, electromagnetic pollution is increasing in a complex manner. In this pollution dominating world the entire human society is living in an electromagnetic environment. The effect of radiation on human beings is now playing a vital role, which may sometimes become fatal. The users and other inhabitants of the vast computer community and others wh... View full abstract»

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  • Role of transient/surge suppressors in a typical airborne system. A case study

    Publication Year: 1999, Page(s):197 - 200
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (208 KB)

    The increased use of electronic circuitry in the present warfare scenario, demands sophisticated systems with higher density integrated circuits with more accuracy and compact size. As the sophistication/complexity of the system increases their "transient vulnerability" also goes up. Most of the semiconductor devices and other sensitive electronic equipment are easily damaged with transients of hi... View full abstract»

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  • Modelling of path loss for land mobile cm and mm wave communication systems

    Publication Year: 1999, Page(s):75 - 78
    IEEE is not the copyright holder of this material | Click to expandAbstract | PDF file iconPDF (208 KB)

    In this paper an attempt is made to extend Hata's method for estimating path loss to cm and mm wave lengths using adaptive propagation techniques. The measurements reported in the literature at 9.6, 28.8 and 57.6 GHz are utilized to deduce the coefficients in the adaptive propagation models for the case of rural area. Predicted results compare well with the experimental data. View full abstract»

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