Pub Date : 2016-05-17DOI: 10.1109/APEMC.2016.7522798
Lu Wang, Hongxing Zheng
A tri-band antenna has been designed for the satellite communication devices. It is constructed as a U-shaped slot put into the middle of the patch, and two L-shaped slot patterns around the edge, accompanied with 4 circular corners on the patch. Three frequency bands can be achieved in the range of 4.63 GHz-6.55 GHz, 8.34 GHz- 9.59GHz, and 12.34 GHz-13.79GHz. Current distribution has been analyzed on each slot size. It is found that return loss has been reduced effectively in required frequencies when increasing the length of current path properly. In addition, reducing the width of ground, the whole size of antenna can be decreased, and its radiation effectiveness can be enhanced. Measurement results show the antenna available.
{"title":"Tri-band antenna with slot patterns on the edge","authors":"Lu Wang, Hongxing Zheng","doi":"10.1109/APEMC.2016.7522798","DOIUrl":"https://doi.org/10.1109/APEMC.2016.7522798","url":null,"abstract":"A tri-band antenna has been designed for the satellite communication devices. It is constructed as a U-shaped slot put into the middle of the patch, and two L-shaped slot patterns around the edge, accompanied with 4 circular corners on the patch. Three frequency bands can be achieved in the range of 4.63 GHz-6.55 GHz, 8.34 GHz- 9.59GHz, and 12.34 GHz-13.79GHz. Current distribution has been analyzed on each slot size. It is found that return loss has been reduced effectively in required frequencies when increasing the length of current path properly. In addition, reducing the width of ground, the whole size of antenna can be decreased, and its radiation effectiveness can be enhanced. Measurement results show the antenna available.","PeriodicalId":358257,"journal":{"name":"2016 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC)","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124959352","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 : 2016-05-17DOI: 10.1109/APEMC.2016.7522799
Yuan Dingwang, Peiguo Liu, Yanfei Dong
The design of miniaturized metamaterial absorber is based on the modified Minkowski(M-Minkowski) fractal structure. The proposed absorber is composed of M- Minkowski fractal structure in the top layer etched on dielectric substrate with the lower metal plate. The simulated results indicate that the metamaterial absorber has dual-band absorbing peaks with high absorptivity (>99%). The absorber is insensitive to polarization and has a wide angles(upto 60o) characteristic of incident waves for both TE and TM mode. The proposed absorber can reduce the absorption response bands and further implement miniaturization comparing with the Minkowski fractal structure.
{"title":"A novel miniaturized metamaterial absorber based on the modified Minkowski fractal structure","authors":"Yuan Dingwang, Peiguo Liu, Yanfei Dong","doi":"10.1109/APEMC.2016.7522799","DOIUrl":"https://doi.org/10.1109/APEMC.2016.7522799","url":null,"abstract":"The design of miniaturized metamaterial absorber is based on the modified Minkowski(M-Minkowski) fractal structure. The proposed absorber is composed of M- Minkowski fractal structure in the top layer etched on dielectric substrate with the lower metal plate. The simulated results indicate that the metamaterial absorber has dual-band absorbing peaks with high absorptivity (>99%). The absorber is insensitive to polarization and has a wide angles(upto 60o) characteristic of incident waves for both TE and TM mode. The proposed absorber can reduce the absorption response bands and further implement miniaturization comparing with the Minkowski fractal structure.","PeriodicalId":358257,"journal":{"name":"2016 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122308023","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 : 2016-05-17DOI: 10.1109/APEMC.2016.7522875
Bin Li, Qingquan Li, Hongshun Liu, Mingming Han, Zhenning Huang, Jiangtao Wang
Series resonant type fault current limiter (SRFCL) may find earliest applications in power systems; however, its comprehensive impacts on power system need further investigation and verification. On the basis of the equivalent model of SRFCL proposed in this paper, its influence on the interruption overvoltage of 500kV EHV off-load transmission line is studied. With regard to interrupting off-load line, considering different switching times, the terminal overvoltage waveforms of interrupting off-load line with and without installation of SRFCL are analyzed by simulation. If arc doesn't reignite, there will be no influence of SRFCL on the terminal voltage. If not, the interruption overvoltage of off-load line will be suppressed by SRFCL. With consideration of different fault current reactance, the relationships between instantaneous maximum of overvoltage when arc reignites, oscillation period of free component and different fault current limiting reactance are presented. The simulation analysis and theory computation results show that the installation of SRFCL is benefit for interrupting off-load transmission line.
{"title":"The overvoltage of interrupting off-load transmission line with series-resonant type fault current limiter","authors":"Bin Li, Qingquan Li, Hongshun Liu, Mingming Han, Zhenning Huang, Jiangtao Wang","doi":"10.1109/APEMC.2016.7522875","DOIUrl":"https://doi.org/10.1109/APEMC.2016.7522875","url":null,"abstract":"Series resonant type fault current limiter (SRFCL) may find earliest applications in power systems; however, its comprehensive impacts on power system need further investigation and verification. On the basis of the equivalent model of SRFCL proposed in this paper, its influence on the interruption overvoltage of 500kV EHV off-load transmission line is studied. With regard to interrupting off-load line, considering different switching times, the terminal overvoltage waveforms of interrupting off-load line with and without installation of SRFCL are analyzed by simulation. If arc doesn't reignite, there will be no influence of SRFCL on the terminal voltage. If not, the interruption overvoltage of off-load line will be suppressed by SRFCL. With consideration of different fault current reactance, the relationships between instantaneous maximum of overvoltage when arc reignites, oscillation period of free component and different fault current limiting reactance are presented. The simulation analysis and theory computation results show that the installation of SRFCL is benefit for interrupting off-load transmission line.","PeriodicalId":358257,"journal":{"name":"2016 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128398098","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 : 2016-05-17DOI: 10.1109/APEMC.2016.7522964
Jun Dong, Lina Hong, Jie Meng
Aiming at the shortcomings of the existing composite electromagnetic field calculation method, the paper puts forward a kind of composite field estimate method based on Element filed decomposition-superposition. Equivalent modeling was carried out on the antenna radiator and its platform use the way of decomposition - superposition. Different features model according to the different electromagnetic calculation method. And then, using the method, it forecast the electromagnetic fields between multiple platforms, and designs the process to predict. It meets the requirement of test electromagnetic environment (EME) prediction for multi-platform. It makes up for the deficiency of the existing electromagnetic environment forecast methods, and is conducive to solve the multiple electrically large platform composite field calculation problems.
{"title":"Composite electromagnetic field estimation method based on element field decomposition and superposition","authors":"Jun Dong, Lina Hong, Jie Meng","doi":"10.1109/APEMC.2016.7522964","DOIUrl":"https://doi.org/10.1109/APEMC.2016.7522964","url":null,"abstract":"Aiming at the shortcomings of the existing composite electromagnetic field calculation method, the paper puts forward a kind of composite field estimate method based on Element filed decomposition-superposition. Equivalent modeling was carried out on the antenna radiator and its platform use the way of decomposition - superposition. Different features model according to the different electromagnetic calculation method. And then, using the method, it forecast the electromagnetic fields between multiple platforms, and designs the process to predict. It meets the requirement of test electromagnetic environment (EME) prediction for multi-platform. It makes up for the deficiency of the existing electromagnetic environment forecast methods, and is conducive to solve the multiple electrically large platform composite field calculation problems.","PeriodicalId":358257,"journal":{"name":"2016 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC)","volume":"01 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130599683","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 : 2016-05-17DOI: 10.1109/APEMC.2016.7522957
Man-tang Su, Jia-qing Chen, Yu Zhang, Jie Yang
Based on the scattering model of charged particles to electromagnetic waves in Rayleigh approximation and permittivity model of ice particles, we deduced the attenuation model under the situation when the electromagnetic waves pass through ice particles area, then we performed the simulation and made analyses. The results show that: (1) When the ice particles are electrically charged, the attenuation of electromagnetic waves is much greater than those who are not charged. (2) The more charge of ice particles, the greater effect it will make on the attenuation of electromagnetic waves. (3) The frequency of the electromagnetic waves also has a great influence on the attenuation, the higher the frequency, the greater the attenuation.
{"title":"The influence of ice particles on microwave propagation in thundercloud","authors":"Man-tang Su, Jia-qing Chen, Yu Zhang, Jie Yang","doi":"10.1109/APEMC.2016.7522957","DOIUrl":"https://doi.org/10.1109/APEMC.2016.7522957","url":null,"abstract":"Based on the scattering model of charged particles to electromagnetic waves in Rayleigh approximation and permittivity model of ice particles, we deduced the attenuation model under the situation when the electromagnetic waves pass through ice particles area, then we performed the simulation and made analyses. The results show that: (1) When the ice particles are electrically charged, the attenuation of electromagnetic waves is much greater than those who are not charged. (2) The more charge of ice particles, the greater effect it will make on the attenuation of electromagnetic waves. (3) The frequency of the electromagnetic waves also has a great influence on the attenuation, the higher the frequency, the greater the attenuation.","PeriodicalId":358257,"journal":{"name":"2016 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC)","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128014612","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 : 2016-05-17DOI: 10.1109/APEMC.2016.7522881
Zhao Chunying, Yan Liping, Zhao Xiang, H. Ka-ma
The length determination rule of two equivalent lines in asymptotic approach for high-frequency field coupling to transmission lines is investigated. The induced current along transmission lines with different structure exposed to high frequency plane wave is calculated using asymptotic approach and full-wave analysis commercial software NEC respectively. Results show that the length of two equivalent lines recommended in literature sometimes leads to incorrect results. Length determination rule of equivalent lines is suggested according to induced current results obtained using different length of equivalent lines.
{"title":"Length determination of equivalent lines in asymptotic approach for high-frequency field coupling to transmission lines","authors":"Zhao Chunying, Yan Liping, Zhao Xiang, H. Ka-ma","doi":"10.1109/APEMC.2016.7522881","DOIUrl":"https://doi.org/10.1109/APEMC.2016.7522881","url":null,"abstract":"The length determination rule of two equivalent lines in asymptotic approach for high-frequency field coupling to transmission lines is investigated. The induced current along transmission lines with different structure exposed to high frequency plane wave is calculated using asymptotic approach and full-wave analysis commercial software NEC respectively. Results show that the length of two equivalent lines recommended in literature sometimes leads to incorrect results. Length determination rule of equivalent lines is suggested according to induced current results obtained using different length of equivalent lines.","PeriodicalId":358257,"journal":{"name":"2016 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128019131","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 : 2016-05-17DOI: 10.1109/APEMC.2016.7522852
Ming-Min Su, Peiguo Liu
In this paper, a parameter optimized locally one-dimensional finite-difference time-domain (LOD-FDTD) method using simulated annealing algorithms is presented. In the proposed method, the parameter optimized LOD-FDTD method can reduce the normalized numerical phase velocity error for arbitrary incident wave angles, for different spatial-step size and for time-step sizes. The results show that the proposed method is unconditionally stable. Compared with literature result, this method can minimize more dispersion error.
{"title":"A global optimized parameter to reduce the numerical dispersion of the LOD-FDTD method","authors":"Ming-Min Su, Peiguo Liu","doi":"10.1109/APEMC.2016.7522852","DOIUrl":"https://doi.org/10.1109/APEMC.2016.7522852","url":null,"abstract":"In this paper, a parameter optimized locally one-dimensional finite-difference time-domain (LOD-FDTD) method using simulated annealing algorithms is presented. In the proposed method, the parameter optimized LOD-FDTD method can reduce the normalized numerical phase velocity error for arbitrary incident wave angles, for different spatial-step size and for time-step sizes. The results show that the proposed method is unconditionally stable. Compared with literature result, this method can minimize more dispersion error.","PeriodicalId":358257,"journal":{"name":"2016 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123129036","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 : 2016-05-17DOI: 10.1109/APEMC.2016.7522899
B. Zhu, Hong Li, Zhichang Yang
Chaotic pulse width modulation (CPWM) is applied widely in power converters to suppress electromagnetic interference (EMI). However, core loss analysis of magnetic components in power converters under CPWM is usually overlooked. In this paper, a core loss analysis approach of inductor in a buck converter under CPWM is introduced based on ANSYS. This approach can be applied to predict and compare inductor core loss in buck converter under CPWM and traditional pulse width modulation (TPWM). The core loss analysis results show that the proposed approach is appropriate for predicting the core loss of buck converter inductor under CPWM.
{"title":"Core loss analysis of buck converter under chaotic PWM based on ANSYS","authors":"B. Zhu, Hong Li, Zhichang Yang","doi":"10.1109/APEMC.2016.7522899","DOIUrl":"https://doi.org/10.1109/APEMC.2016.7522899","url":null,"abstract":"Chaotic pulse width modulation (CPWM) is applied widely in power converters to suppress electromagnetic interference (EMI). However, core loss analysis of magnetic components in power converters under CPWM is usually overlooked. In this paper, a core loss analysis approach of inductor in a buck converter under CPWM is introduced based on ANSYS. This approach can be applied to predict and compare inductor core loss in buck converter under CPWM and traditional pulse width modulation (TPWM). The core loss analysis results show that the proposed approach is appropriate for predicting the core loss of buck converter inductor under CPWM.","PeriodicalId":358257,"journal":{"name":"2016 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125712502","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 : 2016-05-17DOI: 10.1109/APEMC.2016.7522786
Kun Liu, Chuan Wang, Huilian She
In order to estimate the critical electric field intensity of soil ionization, we consider relationship between the differential form of ohm's law and the moment when soil just begin to ionize. And then the critical electric field intensity of soil A which presented in Liew's literature was estimated by the relationship. The effectiveness of the proposed method was verified by the soil A, yielding satisfactory agreement. The result show this method can help us to determine the critical electric field intensity Ec.
{"title":"Estimation of critical electric field intensity of soil ionization base on the ohm's law","authors":"Kun Liu, Chuan Wang, Huilian She","doi":"10.1109/APEMC.2016.7522786","DOIUrl":"https://doi.org/10.1109/APEMC.2016.7522786","url":null,"abstract":"In order to estimate the critical electric field intensity of soil ionization, we consider relationship between the differential form of ohm's law and the moment when soil just begin to ionize. And then the critical electric field intensity of soil A which presented in Liew's literature was estimated by the relationship. The effectiveness of the proposed method was verified by the soil A, yielding satisfactory agreement. The result show this method can help us to determine the critical electric field intensity Ec.","PeriodicalId":358257,"journal":{"name":"2016 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126628974","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}
The electromagnetic waves emitted from devices can be a source of information leakage and can cause electromagnetic compatibility (EMC) problems. Electromagnetic radiation signal from computer display can be seen as a computer security risk if the radiation signal is intercepted and reconstructed. In addition to the image information displayed by the computer, electromagnetic radiation leaks the hardware information of the computer itself which is more important for some attackers, protectors and security inspection workers. In this paper, we model the electromagnetic radiate video signal and theoretically prove that variation trend of spectrum harmonics of electromagnetic radiate video signal vary between different computers. Based on the model we propose spectral centroid based algorithm (SP algorithm) to identify computers. By using the algorithm, we can automatically and accurately identify computers through electromagnetic radiation.
{"title":"A new method to recognize computer through electromagnetic radiation based on spectral centroid","authors":"Degang Sun, Jun Shi, Dong Wei, Meng Zhang, Wei-qing Huang, Xuguang Qiu","doi":"10.1109/APEMC.2016.7523003","DOIUrl":"https://doi.org/10.1109/APEMC.2016.7523003","url":null,"abstract":"The electromagnetic waves emitted from devices can be a source of information leakage and can cause electromagnetic compatibility (EMC) problems. Electromagnetic radiation signal from computer display can be seen as a computer security risk if the radiation signal is intercepted and reconstructed. In addition to the image information displayed by the computer, electromagnetic radiation leaks the hardware information of the computer itself which is more important for some attackers, protectors and security inspection workers. In this paper, we model the electromagnetic radiate video signal and theoretically prove that variation trend of spectrum harmonics of electromagnetic radiate video signal vary between different computers. Based on the model we propose spectral centroid based algorithm (SP algorithm) to identify computers. By using the algorithm, we can automatically and accurately identify computers through electromagnetic radiation.","PeriodicalId":358257,"journal":{"name":"2016 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC)","volume":"2010 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127345844","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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