Pub Date : 2012-05-21DOI: 10.1109/APEMC.2012.6237899
Whamid Al-Shabib, D. Habibi, Zonghan Xie, Xiaoli Zhao
The objective of this paper is to identify a suitable coating material in order to tune the microwave radiation and produce absorption losses for Wi-Fi devices. It is also desirable to obtain high absorption losses outside the Wi-Fi microwave frequency range of 2.4 GHz. Literature reviews of several types of material are described and compared for the use of the selected material in order to coat a Wi-Fi device for the desired absorption losses for that device. The selected material for the Wi-Fi device is usually a metal material or a combination of metals like Aluminium in polymer matrix with different types of composites. The choice of materials will aim to target the tuning of the electromagnetic spectrum at a frequency in the range of 2.4 GHz. The paper focuses on two groups of polymer materials; conducting material as a result of composites like Carbon Nanotube Composites (CNC) or other metal composites. The second group is the Intrinsic Conducting Polymer (ICP) which conducts as a result of doping with other materials. A third group is the highly conductive metals like copper and aluminum. The metals are used as a reference comparator to the other two groups.
{"title":"Identifying smart conducting materials for Wi-Fi electromagnetic interference shielding","authors":"Whamid Al-Shabib, D. Habibi, Zonghan Xie, Xiaoli Zhao","doi":"10.1109/APEMC.2012.6237899","DOIUrl":"https://doi.org/10.1109/APEMC.2012.6237899","url":null,"abstract":"The objective of this paper is to identify a suitable coating material in order to tune the microwave radiation and produce absorption losses for Wi-Fi devices. It is also desirable to obtain high absorption losses outside the Wi-Fi microwave frequency range of 2.4 GHz. Literature reviews of several types of material are described and compared for the use of the selected material in order to coat a Wi-Fi device for the desired absorption losses for that device. The selected material for the Wi-Fi device is usually a metal material or a combination of metals like Aluminium in polymer matrix with different types of composites. The choice of materials will aim to target the tuning of the electromagnetic spectrum at a frequency in the range of 2.4 GHz. The paper focuses on two groups of polymer materials; conducting material as a result of composites like Carbon Nanotube Composites (CNC) or other metal composites. The second group is the Intrinsic Conducting Polymer (ICP) which conducts as a result of doping with other materials. A third group is the highly conductive metals like copper and aluminum. The metals are used as a reference comparator to the other two groups.","PeriodicalId":300639,"journal":{"name":"2012 Asia-Pacific Symposium on Electromagnetic Compatibility","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130511287","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-05-21DOI: 10.1109/APEMC.2012.6237935
Jun Liu, Haiyun Han, Haihong Qin, Jiaopu Wen, Deming Zhu
The goal of this paper is to optimize the current loop of permanent magnet synchronous servo system. The current control loop form and the suitable parameters have been discussed first. Then the over modulation in PWM modulation has been introduced to improve the performance of current control loop, especially when the speed of motor is high. A prototype motor is designed and the experiment and simulation show that the feedback current follows the reference current exactly and fast. The over modulation can restrain the EMF, and improve the performance of current control loop, which provides a basis for realizing high performance permanent magnet synchronous servo system. The PCB design is also discussed to eliminate the EMI effects on the current loop.
{"title":"Optimization design of current loop for permanent magnet synchronous servo system","authors":"Jun Liu, Haiyun Han, Haihong Qin, Jiaopu Wen, Deming Zhu","doi":"10.1109/APEMC.2012.6237935","DOIUrl":"https://doi.org/10.1109/APEMC.2012.6237935","url":null,"abstract":"The goal of this paper is to optimize the current loop of permanent magnet synchronous servo system. The current control loop form and the suitable parameters have been discussed first. Then the over modulation in PWM modulation has been introduced to improve the performance of current control loop, especially when the speed of motor is high. A prototype motor is designed and the experiment and simulation show that the feedback current follows the reference current exactly and fast. The over modulation can restrain the EMF, and improve the performance of current control loop, which provides a basis for realizing high performance permanent magnet synchronous servo system. The PCB design is also discussed to eliminate the EMI effects on the current loop.","PeriodicalId":300639,"journal":{"name":"2012 Asia-Pacific Symposium on Electromagnetic Compatibility","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133777824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-05-21DOI: 10.1109/APEMC.2012.6238001
O. Aiello, F. Fiori
This paper deals with the susceptibility to electromagnetic interference (EMI) of circuits used in smart power integrated circuits to sense the current of power transistors. The susceptibility of a conventional current sensor based on the mirroring principle is first investigated. Then a new circuit that avoids the electrical connection of the current sensor to the power transistor drain terminal is proposed. The susceptibility of the above mentioned current sensors is discussed and evaluated by means of time-domain computer simulations.
{"title":"A new current sensor based on the Miller effect highly immune to EMI","authors":"O. Aiello, F. Fiori","doi":"10.1109/APEMC.2012.6238001","DOIUrl":"https://doi.org/10.1109/APEMC.2012.6238001","url":null,"abstract":"This paper deals with the susceptibility to electromagnetic interference (EMI) of circuits used in smart power integrated circuits to sense the current of power transistors. The susceptibility of a conventional current sensor based on the mirroring principle is first investigated. Then a new circuit that avoids the electrical connection of the current sensor to the power transistor drain terminal is proposed. The susceptibility of the above mentioned current sensors is discussed and evaluated by means of time-domain computer simulations.","PeriodicalId":300639,"journal":{"name":"2012 Asia-Pacific Symposium on Electromagnetic Compatibility","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133790587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-05-21DOI: 10.1109/APEMC.2012.6237909
M. Bakr, J. Bandler, N. Nikolova
Over the years, Transmission Line Modeling (TLM) has evolved into a robust numerical modeling technique through the pioneering work of P. B. Johns, Wolfgang Hoefer, and others. Using this technique, the electromagnetic (EM) phenomenon is modeled through the propagation of voltages and currents over a network of transmission lines. We review in this paper some of the recent applications of TLM to efficient optimization and modeling of high frequency structures. These applications include TLM-based Space Mapping (SM) optimization and the TLM-based Adjoint Variable Method (AVM). We illustrate these approaches through two examples.
多年来，传输线建模(TLM)通过P. B. Johns, Wolfgang Hoefer等人的开创性工作已经发展成为一种强大的数值建模技术。利用这种技术，电磁(EM)现象通过电压和电流在传输线网络上的传播来建模。本文综述了TLM在高频结构高效优化和建模方面的最新应用。这些应用包括基于tlm的空间映射优化和基于tlm的伴随变量法(AVM)。我们通过两个例子来说明这些方法。
{"title":"TLM: A robust tool for electromagnetics-based optimization","authors":"M. Bakr, J. Bandler, N. Nikolova","doi":"10.1109/APEMC.2012.6237909","DOIUrl":"https://doi.org/10.1109/APEMC.2012.6237909","url":null,"abstract":"Over the years, Transmission Line Modeling (TLM) has evolved into a robust numerical modeling technique through the pioneering work of P. B. Johns, Wolfgang Hoefer, and others. Using this technique, the electromagnetic (EM) phenomenon is modeled through the propagation of voltages and currents over a network of transmission lines. We review in this paper some of the recent applications of TLM to efficient optimization and modeling of high frequency structures. These applications include TLM-based Space Mapping (SM) optimization and the TLM-based Adjoint Variable Method (AVM). We illustrate these approaches through two examples.","PeriodicalId":300639,"journal":{"name":"2012 Asia-Pacific Symposium on Electromagnetic Compatibility","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130644679","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-05-21DOI: 10.1109/APEMC.2012.6237873
Yaojiang Zhang, Shenhui Jing, J. Fan
The assumption of transverse electromagnetic (TEM) field distribution on via holes is checked by a two-dimensional (2D) finite difference method (FDM). It is found that for a via without pad, TEM mode assumption is a quite good approximation. However, for a via with a pad, i.e. the via pad radius is different from the via barrel radius, the field distribution on the via hole begins to deviate from the TEM mode. This indicates previous analytical formula for a via with pad may need to be modified at very high frequencies due to its usage of TEM field assumption on via holes. The results obtained by 2D FDM have been verified by a three-dimensional commercial electrostatic solver.
{"title":"Studies of TEM mode assumption on via holes in via modelings","authors":"Yaojiang Zhang, Shenhui Jing, J. Fan","doi":"10.1109/APEMC.2012.6237873","DOIUrl":"https://doi.org/10.1109/APEMC.2012.6237873","url":null,"abstract":"The assumption of transverse electromagnetic (TEM) field distribution on via holes is checked by a two-dimensional (2D) finite difference method (FDM). It is found that for a via without pad, TEM mode assumption is a quite good approximation. However, for a via with a pad, i.e. the via pad radius is different from the via barrel radius, the field distribution on the via hole begins to deviate from the TEM mode. This indicates previous analytical formula for a via with pad may need to be modified at very high frequencies due to its usage of TEM field assumption on via holes. The results obtained by 2D FDM have been verified by a three-dimensional commercial electrostatic solver.","PeriodicalId":300639,"journal":{"name":"2012 Asia-Pacific Symposium on Electromagnetic Compatibility","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131022310","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-05-21DOI: 10.1109/APEMC.2012.6237814
T. Ohtsu, T. Takai, K. Tanitsuji, K. Minami, S. Imai, H. Fujikawa
The robustness of ESD (electrostatic discharge) is decreased by increasing frequency and data transfer rate. An ESD and EMI (electronic magneto interference) problem arises when measures for reducing ESD and EMI do not meet the immunity level of the device. In order to accomplish proper countermeasures against ESD and EMI, it is necessary to investigate the phenomena. An electromagnetic wave caused by the ESD has a broad-band and high energy which is concerning factors for electronic devices such as semiconductor, MEMS and Magnetic head. In this paper, we investigated the characteristic of radiated electro-magnetic wave in a HDD enclosure by ESD injection with contact or air gap discharge. It was found that the phenomena of enhanced radiated electromagnetic wave in low voltage by air gap discharge due to lower discharge resistance and higher rise time.
{"title":"Observation of Electromagnetic wave in a HDD enclosure by ESD injection","authors":"T. Ohtsu, T. Takai, K. Tanitsuji, K. Minami, S. Imai, H. Fujikawa","doi":"10.1109/APEMC.2012.6237814","DOIUrl":"https://doi.org/10.1109/APEMC.2012.6237814","url":null,"abstract":"The robustness of ESD (electrostatic discharge) is decreased by increasing frequency and data transfer rate. An ESD and EMI (electronic magneto interference) problem arises when measures for reducing ESD and EMI do not meet the immunity level of the device. In order to accomplish proper countermeasures against ESD and EMI, it is necessary to investigate the phenomena. An electromagnetic wave caused by the ESD has a broad-band and high energy which is concerning factors for electronic devices such as semiconductor, MEMS and Magnetic head. In this paper, we investigated the characteristic of radiated electro-magnetic wave in a HDD enclosure by ESD injection with contact or air gap discharge. It was found that the phenomena of enhanced radiated electromagnetic wave in low voltage by air gap discharge due to lower discharge resistance and higher rise time.","PeriodicalId":300639,"journal":{"name":"2012 Asia-Pacific Symposium on Electromagnetic Compatibility","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131022413","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-05-21DOI: 10.1109/APEMC.2012.6237885
S. Aoyama, D. Anzai, Jianqing Wang
Implant body area networks (BANs) have so far drawn considerable attention in biomedical applications. Although implant BANs require high throughput performance of wireless communication due to real-time data transmission, the transmit power is strictly regulated in order to satisfy a safety guideline in terms of specific absorption rate (SAR). In this paper, we evaluate the local peak SAR based on required bit error rate (BER) performance for implant BANs at 400 MHz medical implant communication service (MICS) band. To begin with, we first perform finite-difference time-domain (FDTD) simulations for implant BAN propagation with a numerical human body model, and derive the propagation characteristic of implant BAN signals. Then, we calculate the BER performance under this implant propagation channel and derive the required transmit power to secure a permissible BER. Finally, we calculate the local peak SAR under the required transmit power when the implant transmitter moves along the digestive organs. Based on such an approach, we attempt to determine a threshold transmit power which could be used to ensure the induced SAR not exceeding the safety guideline.
{"title":"SAR evaluation based on required BER performance for 400 MHz implant BANs","authors":"S. Aoyama, D. Anzai, Jianqing Wang","doi":"10.1109/APEMC.2012.6237885","DOIUrl":"https://doi.org/10.1109/APEMC.2012.6237885","url":null,"abstract":"Implant body area networks (BANs) have so far drawn considerable attention in biomedical applications. Although implant BANs require high throughput performance of wireless communication due to real-time data transmission, the transmit power is strictly regulated in order to satisfy a safety guideline in terms of specific absorption rate (SAR). In this paper, we evaluate the local peak SAR based on required bit error rate (BER) performance for implant BANs at 400 MHz medical implant communication service (MICS) band. To begin with, we first perform finite-difference time-domain (FDTD) simulations for implant BAN propagation with a numerical human body model, and derive the propagation characteristic of implant BAN signals. Then, we calculate the BER performance under this implant propagation channel and derive the required transmit power to secure a permissible BER. Finally, we calculate the local peak SAR under the required transmit power when the implant transmitter moves along the digestive organs. Based on such an approach, we attempt to determine a threshold transmit power which could be used to ensure the induced SAR not exceeding the safety guideline.","PeriodicalId":300639,"journal":{"name":"2012 Asia-Pacific Symposium on Electromagnetic Compatibility","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133534408","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-05-21DOI: 10.1109/APEMC.2012.6238015
Jongsung Kim, R. Mittra
The spectral field data on an observation plane inside a mode-stirred chamber describe the directional dependence of all supported modes in the reverberation chamber. Correlation coefficients are computed to evaluate the efficiency of the mode-stirrer for three different sizes of stirrers. The spectral characteristics of the stirring effects in a reverberation chamber are compared with the conventional statistical results about the uniformity of the spatial electric fields.
{"title":"Performance evaluation of a mode-stirred reverberation chamber using the finite difference time domain (FDTD) simulation","authors":"Jongsung Kim, R. Mittra","doi":"10.1109/APEMC.2012.6238015","DOIUrl":"https://doi.org/10.1109/APEMC.2012.6238015","url":null,"abstract":"The spectral field data on an observation plane inside a mode-stirred chamber describe the directional dependence of all supported modes in the reverberation chamber. Correlation coefficients are computed to evaluate the efficiency of the mode-stirrer for three different sizes of stirrers. The spectral characteristics of the stirring effects in a reverberation chamber are compared with the conventional statistical results about the uniformity of the spatial electric fields.","PeriodicalId":300639,"journal":{"name":"2012 Asia-Pacific Symposium on Electromagnetic Compatibility","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133672839","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-05-21DOI: 10.1109/APEMC.2012.6237838
M. Rawa, D. Thomas, M. Sumner
The number of nonlinear loads has increased in power systems increasing the harmonics present and this could cause detrimental effects to the system and users. The harmonic current distortion indices are affected by linear loads connected in parallel to the system. The aim of this paper is to quantify the effect of linear loads on the harmonic indices including Total Harmonic Distortion (THD) and Individual Harmonic Distortion (IHD) up to 11th order. The linear load to be considered is an Incandescent Lamp (IL) while the nonlinear loads are a Personal Computer (PC), Fluorescent Lamp (FL) and laptop. Laboratory measurements are performed for this purpose.
{"title":"Harmonics attenuation of nonlinear loads due to linear loads","authors":"M. Rawa, D. Thomas, M. Sumner","doi":"10.1109/APEMC.2012.6237838","DOIUrl":"https://doi.org/10.1109/APEMC.2012.6237838","url":null,"abstract":"The number of nonlinear loads has increased in power systems increasing the harmonics present and this could cause detrimental effects to the system and users. The harmonic current distortion indices are affected by linear loads connected in parallel to the system. The aim of this paper is to quantify the effect of linear loads on the harmonic indices including Total Harmonic Distortion (THD) and Individual Harmonic Distortion (IHD) up to 11th order. The linear load to be considered is an Incandescent Lamp (IL) while the nonlinear loads are a Personal Computer (PC), Fluorescent Lamp (FL) and laptop. Laboratory measurements are performed for this purpose.","PeriodicalId":300639,"journal":{"name":"2012 Asia-Pacific Symposium on Electromagnetic Compatibility","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133719399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2012-05-21DOI: 10.1109/APEMC.2012.6237998
C. Marot, E. Sicard
This paper reviews the methods proposed by the International Electrotechnical Commission (IEC) for characterizing and modelling of Electromagnetic Compatibility (EMC) of Integrated Circuits (IC). The development of tools and EMC performance prediction methods is also described in the context of IC obsolescence, through the French research project SEISME.
{"title":"EMC standards at IC level - status of IEC and technical goals of the SEISME project","authors":"C. Marot, E. Sicard","doi":"10.1109/APEMC.2012.6237998","DOIUrl":"https://doi.org/10.1109/APEMC.2012.6237998","url":null,"abstract":"This paper reviews the methods proposed by the International Electrotechnical Commission (IEC) for characterizing and modelling of Electromagnetic Compatibility (EMC) of Integrated Circuits (IC). The development of tools and EMC performance prediction methods is also described in the context of IC obsolescence, through the French research project SEISME.","PeriodicalId":300639,"journal":{"name":"2012 Asia-Pacific Symposium on Electromagnetic Compatibility","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114497731","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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