Pub Date : 2012-05-21DOI: 10.1109/APEMC.2012.6237843
Xueying Lu, Yingxuan Chen, Cui Meng
There has been a heated debate on the harmful bioeffects of mobile phone radiation. In this study, we calculate the SAR in human head under electromagnetic radiation with a simplified model of the human head and the mobile phone antenna based on FDTD algorithm. We then analyze the influence of the frequency of mobile phones and the distance between the antenna and the human head. Our conclusion is that higher frequency and longer distance can possibly reduce danger.
{"title":"Calculation of the SAR distribution in human heads from mobile phone radiation based on FDTD algorithm","authors":"Xueying Lu, Yingxuan Chen, Cui Meng","doi":"10.1109/APEMC.2012.6237843","DOIUrl":"https://doi.org/10.1109/APEMC.2012.6237843","url":null,"abstract":"There has been a heated debate on the harmful bioeffects of mobile phone radiation. In this study, we calculate the SAR in human head under electromagnetic radiation with a simplified model of the human head and the mobile phone antenna based on FDTD algorithm. We then analyze the influence of the frequency of mobile phones and the distance between the antenna and the human head. Our conclusion is that higher frequency and longer distance can possibly reduce danger.","PeriodicalId":300639,"journal":{"name":"2012 Asia-Pacific Symposium on Electromagnetic Compatibility","volume":"17 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":"123360957","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.2012.6237969
H. M. Linh, M. Mussetta, F. Grimaccia, R. Zich
FSS are typically periodic media characterized by the capability to inhibit the electromagnetic wave propagation for each angle and each polarization in a specific frequency band. These complex structures present different degree of freedom, that can be used to optimize the performances of the application. On the other hand, the management of different degrees of freedom can result in the complexity increasing of the entire device-design procedure. The aim of this research is to analyse the optimization of FSS by means of MetaPSO, a novel implementation of Particle Swarm Optimization with the aim of a more efficient search over the solution space obtained with a negligible overhead in both complexity and speed.
{"title":"Improved optimization algorithm for frequency selective surface","authors":"H. M. Linh, M. Mussetta, F. Grimaccia, R. Zich","doi":"10.1109/APEMC.2012.6237969","DOIUrl":"https://doi.org/10.1109/APEMC.2012.6237969","url":null,"abstract":"FSS are typically periodic media characterized by the capability to inhibit the electromagnetic wave propagation for each angle and each polarization in a specific frequency band. These complex structures present different degree of freedom, that can be used to optimize the performances of the application. On the other hand, the management of different degrees of freedom can result in the complexity increasing of the entire device-design procedure. The aim of this research is to analyse the optimization of FSS by means of MetaPSO, a novel implementation of Particle Swarm Optimization with the aim of a more efficient search over the solution space obtained with a negligible overhead in both complexity and speed.","PeriodicalId":300639,"journal":{"name":"2012 Asia-Pacific Symposium on Electromagnetic Compatibility","volume":"119 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":"123260557","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.2012.6237906
Lei Liu, Min Li, Ruihai Li, Zhanqing Yu, Zhihong Liu, R. Zeng, Xiangshi Liu
To measure the EM environment parameters of a transmission line in bad weather conditions (such as rain, wind,etc) is difficult for technical staff. In the National Engineering Laboratory for UHV Technology (Kunming), a test line has been completed for EM enviroment tests. An automotive EM environment testing system was installed under the line, and the radio interference (RI), audible noise (AN), resultant electric field (Es) and ion current density (Js) at ground level were measured at all weather conditons with the voltage from ±800kV to ±1000kV over two years. Based on the measurement results, this paper has studied the influence of meteorological parameters on the EM enviroment of the transmisison line.
{"title":"Influence of meteorological parameters on the EM environment of UHVDC transmission line at high altitude","authors":"Lei Liu, Min Li, Ruihai Li, Zhanqing Yu, Zhihong Liu, R. Zeng, Xiangshi Liu","doi":"10.1109/APEMC.2012.6237906","DOIUrl":"https://doi.org/10.1109/APEMC.2012.6237906","url":null,"abstract":"To measure the EM environment parameters of a transmission line in bad weather conditions (such as rain, wind,etc) is difficult for technical staff. In the National Engineering Laboratory for UHV Technology (Kunming), a test line has been completed for EM enviroment tests. An automotive EM environment testing system was installed under the line, and the radio interference (RI), audible noise (AN), resultant electric field (Es) and ion current density (Js) at ground level were measured at all weather conditons with the voltage from ±800kV to ±1000kV over two years. Based on the measurement results, this paper has studied the influence of meteorological parameters on the EM enviroment of the transmisison line.","PeriodicalId":300639,"journal":{"name":"2012 Asia-Pacific Symposium on Electromagnetic Compatibility","volume":"13 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":"123653311","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.2012.6237951
J. Niihara, A. Ametani, K. Yamamoto
Installations of wind turbine generator systems are noteworthy examples of eco-friendly energy generation. Because larger-scale facilities and increased electrical capacity can be realized by increasing the number of turbines, wind energy can be utilized more efficiently than other clean energy sources. However, the number of lightning strikes has increased with the popularization of wind turbine generator systems because of their heights. The grounding potential increase owing to the flow of lightning current into the ground causes damage to equipment installed in the vicinity or inside the wind turbine system. The grounding potential rise depends on the transient characteristics of the grounding systems. Therefore, it is important to clarify these grounding characteristics. In this paper, the experimental results for the transient grounding characteristics of a wind turbine system with a counterpoise connecting it to another wind turbine grounding system are presented. In addition, to verify the effects of the counterpoise, we used the finite difference time domain (FDTD) method.
{"title":"Transient grounding characteristics of wind turbine with counterpoise","authors":"J. Niihara, A. Ametani, K. Yamamoto","doi":"10.1109/APEMC.2012.6237951","DOIUrl":"https://doi.org/10.1109/APEMC.2012.6237951","url":null,"abstract":"Installations of wind turbine generator systems are noteworthy examples of eco-friendly energy generation. Because larger-scale facilities and increased electrical capacity can be realized by increasing the number of turbines, wind energy can be utilized more efficiently than other clean energy sources. However, the number of lightning strikes has increased with the popularization of wind turbine generator systems because of their heights. The grounding potential increase owing to the flow of lightning current into the ground causes damage to equipment installed in the vicinity or inside the wind turbine system. The grounding potential rise depends on the transient characteristics of the grounding systems. Therefore, it is important to clarify these grounding characteristics. In this paper, the experimental results for the transient grounding characteristics of a wind turbine system with a counterpoise connecting it to another wind turbine grounding system are presented. In addition, to verify the effects of the counterpoise, we used the finite difference time domain (FDTD) method.","PeriodicalId":300639,"journal":{"name":"2012 Asia-Pacific Symposium on Electromagnetic Compatibility","volume":"17 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":"121614556","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.2012.6237933
B. Wu, Tingting Mo
As the increasing demand of small form factor and low-cost package drives the interconnect density, crosstalk noise due to the parasitic components set the limitation in off-die high speed signaling. This paper presents a barbed transmission line design to eliminate the far-end crosstalk by adding periodical stubs on the original microstrip structures. By purposely increasing the mutual capacitance, the signal discontinuity of microstrip line design is greatly improved for the multi-gigabit/second links in IC packages. The parametric analysis on stub tuning is given with geometric structures. The time-domain noise simulations and frequency domain crosstalk assessment are performed in accompany with the hardware experiments to verify the proposed concept.
{"title":"Barbed transmission lines for crosstalk suppression","authors":"B. Wu, Tingting Mo","doi":"10.1109/APEMC.2012.6237933","DOIUrl":"https://doi.org/10.1109/APEMC.2012.6237933","url":null,"abstract":"As the increasing demand of small form factor and low-cost package drives the interconnect density, crosstalk noise due to the parasitic components set the limitation in off-die high speed signaling. This paper presents a barbed transmission line design to eliminate the far-end crosstalk by adding periodical stubs on the original microstrip structures. By purposely increasing the mutual capacitance, the signal discontinuity of microstrip line design is greatly improved for the multi-gigabit/second links in IC packages. The parametric analysis on stub tuning is given with geometric structures. The time-domain noise simulations and frequency domain crosstalk assessment are performed in accompany with the hardware experiments to verify the proposed concept.","PeriodicalId":300639,"journal":{"name":"2012 Asia-Pacific Symposium on Electromagnetic Compatibility","volume":"9 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":"124211847","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.2012.6237808
Y. S. Meng, Y. Shan, H. Neo
In this paper, the development of a waveguide microwave power sensor calibration system is reported. This system is a physical realization of the direct comparison transfer of waveguide microwave power sensor calibration up to 110 GHz. For the developed calibration system, the measurement uncertainty is discussed and evaluated, where the major uncertainty contributor for the current system is identified. To further improve the performance of our system and reduce the cost of calibration, some necessary future work is planned.
{"title":"Development of a waveguide microwave power sensor calibration system at NMC","authors":"Y. S. Meng, Y. Shan, H. Neo","doi":"10.1109/APEMC.2012.6237808","DOIUrl":"https://doi.org/10.1109/APEMC.2012.6237808","url":null,"abstract":"In this paper, the development of a waveguide microwave power sensor calibration system is reported. This system is a physical realization of the direct comparison transfer of waveguide microwave power sensor calibration up to 110 GHz. For the developed calibration system, the measurement uncertainty is discussed and evaluated, where the major uncertainty contributor for the current system is identified. To further improve the performance of our system and reduce the cost of calibration, some necessary future work is planned.","PeriodicalId":300639,"journal":{"name":"2012 Asia-Pacific Symposium on Electromagnetic Compatibility","volume":"15 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":"125557412","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.2012.6237866
A. Al-Kalbani, M. Yuce, Jean-Michel Redouté
This paper discusses the simulated exposure to a 5 MHz electromagnetic field powering implanted electronic devices using an inductive link. A high efficiency class-E transmitter circuit operating at 5 MHz has been designed. The circuit generates a 1 W to 5 W transmitted power by means of two possible planar primary coil designs, and powers 5 identical implants which are individually equipped with a secondary inductor. Simulations illustrate that a maximum localized SAR level (averaged over 10 g) of 1.16 W/kg is obtained in a rectangular bone structure with a thickness of 10 mm, when the power transmission is equal to 5 W.
{"title":"Specific absorption rate of inductively powered brain implanted circuits","authors":"A. Al-Kalbani, M. Yuce, Jean-Michel Redouté","doi":"10.1109/APEMC.2012.6237866","DOIUrl":"https://doi.org/10.1109/APEMC.2012.6237866","url":null,"abstract":"This paper discusses the simulated exposure to a 5 MHz electromagnetic field powering implanted electronic devices using an inductive link. A high efficiency class-E transmitter circuit operating at 5 MHz has been designed. The circuit generates a 1 W to 5 W transmitted power by means of two possible planar primary coil designs, and powers 5 identical implants which are individually equipped with a secondary inductor. Simulations illustrate that a maximum localized SAR level (averaged over 10 g) of 1.16 W/kg is obtained in a rectangular bone structure with a thickness of 10 mm, when the power transmission is equal to 5 W.","PeriodicalId":300639,"journal":{"name":"2012 Asia-Pacific Symposium on Electromagnetic Compatibility","volume":"13 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":"126182241","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.2012.6238010
A. Frech, P. Russer
According to the standard CISPR 16-2-3 measurements of electromagnetic interferences (EMI) are carried out either in anechoic chambers or on open area test sites. For testing on open test sites it is necessary to choose a remote location where man-made noise is minimum to avoid covering of the emissions of the device under test by ambient signals. The regulated measurement setup and procedure, described in the standard, is mandatory for compliance measurements and reproducible measurement results of radiated emission measurements in the range of 30MHz to 1 GHz. In this paper methods are presented to suppress unwanted ambient noise and thus allow to perform measurements on noise polluted open test sites. By using ultra high-speed analog-to-digital converters sampling the emissions signal in time-domain and applying the fast Fourier transformation EMI measurements are sped-up by several orders of magnitude compared to measurements carried out with traditional heterodyne receivers operating in frequency domain. Combining the time-domain technology together with adaptive filter techniques the presented system can perform ultra-fast emission measurements in the presence of ambient noise. Advanced strategies with real-time capability for adaptive noise cancellation based on a powerful hardware platform are shown. Frequency domain and time-domain adaptive filtering are compared. The adaptive filter algorithms are investigated and enhanced in respect of implementing the noise cancelling algorithm on field programmable gate arrays ensuring a continuously high data-throughput by an optimized digital signal processing in real-time. Measurements up to 1 GHz are carried out on inner urban sites. Ambient noise suppressing in real-time is shown in frequency bands of over 125MHz at once.
{"title":"Real-time ambient noise cancellation for EMI measurements on open area test sites","authors":"A. Frech, P. Russer","doi":"10.1109/APEMC.2012.6238010","DOIUrl":"https://doi.org/10.1109/APEMC.2012.6238010","url":null,"abstract":"According to the standard CISPR 16-2-3 measurements of electromagnetic interferences (EMI) are carried out either in anechoic chambers or on open area test sites. For testing on open test sites it is necessary to choose a remote location where man-made noise is minimum to avoid covering of the emissions of the device under test by ambient signals. The regulated measurement setup and procedure, described in the standard, is mandatory for compliance measurements and reproducible measurement results of radiated emission measurements in the range of 30MHz to 1 GHz. In this paper methods are presented to suppress unwanted ambient noise and thus allow to perform measurements on noise polluted open test sites. By using ultra high-speed analog-to-digital converters sampling the emissions signal in time-domain and applying the fast Fourier transformation EMI measurements are sped-up by several orders of magnitude compared to measurements carried out with traditional heterodyne receivers operating in frequency domain. Combining the time-domain technology together with adaptive filter techniques the presented system can perform ultra-fast emission measurements in the presence of ambient noise. Advanced strategies with real-time capability for adaptive noise cancellation based on a powerful hardware platform are shown. Frequency domain and time-domain adaptive filtering are compared. The adaptive filter algorithms are investigated and enhanced in respect of implementing the noise cancelling algorithm on field programmable gate arrays ensuring a continuously high data-throughput by an optimized digital signal processing in real-time. Measurements up to 1 GHz are carried out on inner urban sites. Ambient noise suppressing in real-time is shown in frequency bands of over 125MHz at once.","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":"130036538","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.2012.6238022
W. Hoefer
This paper retraces fifty years of research in electromagnetic fields and computational electromagnetics from an autobiographical perspective. It begins with early work on microwave ferrites at the RWTH Aachen and the University of Grenoble during the 1960s that laid the foundations for subsequent work on planar and quasi-planar circuits during the 1970s at the University of Ottawa. The 1980s and 1990s saw the emergence of computing in electromagnetics as a new pillar of microwave and millimetre-wave engineering, while the first decade of the 2nd millennium brought a new kind of man-made metamaterials with exciting new properties and potential for novel devices. Research activities conducted during these years at the Universities of Ottawa and Victoria in Canada, and finally at the IHPC in Singapore, will form the subject of this review.
{"title":"A history of time domain electromagnetics - a voyage back in time","authors":"W. Hoefer","doi":"10.1109/APEMC.2012.6238022","DOIUrl":"https://doi.org/10.1109/APEMC.2012.6238022","url":null,"abstract":"This paper retraces fifty years of research in electromagnetic fields and computational electromagnetics from an autobiographical perspective. It begins with early work on microwave ferrites at the RWTH Aachen and the University of Grenoble during the 1960s that laid the foundations for subsequent work on planar and quasi-planar circuits during the 1970s at the University of Ottawa. The 1980s and 1990s saw the emergence of computing in electromagnetics as a new pillar of microwave and millimetre-wave engineering, while the first decade of the 2nd millennium brought a new kind of man-made metamaterials with exciting new properties and potential for novel devices. Research activities conducted during these years at the Universities of Ottawa and Victoria in Canada, and finally at the IHPC in Singapore, will form the subject of this review.","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":"129609228","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.2012.6238017
V. Ceperic, G. Gielen, A. Barić
A black-box method for modelling of conducted electromagnetic emissions (EME) at an integrated circuit (IC) power supply pin and ground level by adjustable complexity support vector regression machines (ACSVR) is presented. The ACSVR provides a basis for representing the nonlinear dynamic conducted EME. The ACSVR enables accurate modelling of conducted EME according to the IEC 61967-4 1Ω method and allows the adjustment of accuracy versus model simulation speed. As a test case, the EME model of conducted emissions of a 242-transistor voltage reference with offset compensation is presented. The resulting models (implemented in Verilog A) are accurate and fast to execute.
{"title":"Black-box modelling of conducted electromagnetic emissions by adjustable complexity support vector regression machines","authors":"V. Ceperic, G. Gielen, A. Barić","doi":"10.1109/APEMC.2012.6238017","DOIUrl":"https://doi.org/10.1109/APEMC.2012.6238017","url":null,"abstract":"A black-box method for modelling of conducted electromagnetic emissions (EME) at an integrated circuit (IC) power supply pin and ground level by adjustable complexity support vector regression machines (ACSVR) is presented. The ACSVR provides a basis for representing the nonlinear dynamic conducted EME. The ACSVR enables accurate modelling of conducted EME according to the IEC 61967-4 1Ω method and allows the adjustment of accuracy versus model simulation speed. As a test case, the EME model of conducted emissions of a 242-transistor voltage reference with offset compensation is presented. The resulting models (implemented in Verilog A) are accurate and fast to execute.","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":"130845745","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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