Pub Date : 2006-10-01DOI: 10.1109/ISAPE.2006.353247
Dai Fei, Su Donglin, Ling Hongqing, Zhou Fan, J. Shuyuan
This paper simply introduces the traditional calculation method of the normalized site attenuation (NSA) of electromagnetic compatibility (EMC) test site, and also analyzes some errors of the traditional method. Then based on the theory discussed above, a new method to calculate the theoretical value of the NSA is put forward. The new method has more universality than the traditional one.
{"title":"A New Method to Calculate the Theoretical Value of the NSA","authors":"Dai Fei, Su Donglin, Ling Hongqing, Zhou Fan, J. Shuyuan","doi":"10.1109/ISAPE.2006.353247","DOIUrl":"https://doi.org/10.1109/ISAPE.2006.353247","url":null,"abstract":"This paper simply introduces the traditional calculation method of the normalized site attenuation (NSA) of electromagnetic compatibility (EMC) test site, and also analyzes some errors of the traditional method. Then based on the theory discussed above, a new method to calculate the theoretical value of the NSA is put forward. The new method has more universality than the traditional one.","PeriodicalId":113164,"journal":{"name":"2006 7th International Symposium on Antennas, Propagation & EM Theory","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133003880","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 : 2006-10-01DOI: 10.1109/ISAPE.2006.353460
Yiming Tang, Wen Wu
The model and software simulation of a novel substrate integrated waveguide (SIW) sum-difference comparator based on 3dB-coupler with 90deg phase delay is proposed. Equivalent model parameters are initially used to determine geometric sizes and then numerical simulation is applied to make optimization and obtain electrical characteristic variations and electro-magnetic field distributions. An example comparator is presented for operating at 9 GHz, together with S-parameters curves and field distributions. This comparator can be used in minimized direction-finding radar systems.
{"title":"Design of Substrate Integrated Waveguide Sum-Difference Comparator","authors":"Yiming Tang, Wen Wu","doi":"10.1109/ISAPE.2006.353460","DOIUrl":"https://doi.org/10.1109/ISAPE.2006.353460","url":null,"abstract":"The model and software simulation of a novel substrate integrated waveguide (SIW) sum-difference comparator based on 3dB-coupler with 90deg phase delay is proposed. Equivalent model parameters are initially used to determine geometric sizes and then numerical simulation is applied to make optimization and obtain electrical characteristic variations and electro-magnetic field distributions. An example comparator is presented for operating at 9 GHz, together with S-parameters curves and field distributions. This comparator can be used in minimized direction-finding radar systems.","PeriodicalId":113164,"journal":{"name":"2006 7th International Symposium on Antennas, Propagation & EM Theory","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117170146","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 : 2006-10-01DOI: 10.1109/ISAPE.2006.353386
M. He
A full wave method is proposed to analyze the characteristics of the aperture coupled cylindrically conformal microstrip antennas. The near field of the antenna is obtained through conformal FDTD method in cylindrical coordinates and then the equivalence and duality theorems combined with the modified spectral domain dyadic Green's functions for cylindrically stratified media are used to calculate the radiation patterns. As well, a broadband antenna of this type with stacked structure is realized.
{"title":"Accurate and Efficient Analysis of Aperture Coupled Cylindrically Conformal Microstrip Antennas","authors":"M. He","doi":"10.1109/ISAPE.2006.353386","DOIUrl":"https://doi.org/10.1109/ISAPE.2006.353386","url":null,"abstract":"A full wave method is proposed to analyze the characteristics of the aperture coupled cylindrically conformal microstrip antennas. The near field of the antenna is obtained through conformal FDTD method in cylindrical coordinates and then the equivalence and duality theorems combined with the modified spectral domain dyadic Green's functions for cylindrically stratified media are used to calculate the radiation patterns. As well, a broadband antenna of this type with stacked structure is realized.","PeriodicalId":113164,"journal":{"name":"2006 7th International Symposium on Antennas, Propagation & EM Theory","volume":"AES-1 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121002399","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 : 2006-10-01DOI: 10.1109/ISAPE.2006.353293
Liao Haiyan, He Yijun, Wang Wenguang
A new approach is proposed for ship detection with SAR (Synthetics Aperture Radar) images based on the convolution between different polarimetric channels. The method takes advantages of different statistical behaviors among ships and surrounding ocean, interpreting the information through the convolution in order to provide a more reliable detection. The simulations show that the convolution is sensitive to the size and shape of ships not to sea state. The method can be used under high sea state and have no relation to the movement of ships. Moreover, the method is general which is not only suitable for dual polarization data but also for full polarization data. The detection performance over both simulated and real images confirms the robustness of the method.
{"title":"A New Approach for Ship Detection in SAR Imagery Based on Convolution between Different Polarization Channels","authors":"Liao Haiyan, He Yijun, Wang Wenguang","doi":"10.1109/ISAPE.2006.353293","DOIUrl":"https://doi.org/10.1109/ISAPE.2006.353293","url":null,"abstract":"A new approach is proposed for ship detection with SAR (Synthetics Aperture Radar) images based on the convolution between different polarimetric channels. The method takes advantages of different statistical behaviors among ships and surrounding ocean, interpreting the information through the convolution in order to provide a more reliable detection. The simulations show that the convolution is sensitive to the size and shape of ships not to sea state. The method can be used under high sea state and have no relation to the movement of ships. Moreover, the method is general which is not only suitable for dual polarization data but also for full polarization data. The detection performance over both simulated and real images confirms the robustness of the method.","PeriodicalId":113164,"journal":{"name":"2006 7th International Symposium on Antennas, Propagation & EM Theory","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121510560","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 : 2006-10-01DOI: 10.1109/ISAPE.2006.353506
Xiaojin Shi, Yunhua Zhang, Jingshan Jiang
In this paper, a modified correlation coefficient algorithm is proposed to accomplish image-registration for repeat-pass SAR interferometry. This algorithm utilizes a new definition of correlation coefficient to improve the calculation accuracy of offset between two images. Our simulation shows that Doppler centroid has a significant influence on the correlation coefficient and it should be removed before registration. SIR-C/X X- band experimental data has been processed to demonstrate the effect of the proposed algorithm. Also quantitative comparison between this paper's results and the results from the maximum-spectrum method is presented to show the improvement.
{"title":"InSAR Image Registration Using Modified Correlation Coefficient Algorithm","authors":"Xiaojin Shi, Yunhua Zhang, Jingshan Jiang","doi":"10.1109/ISAPE.2006.353506","DOIUrl":"https://doi.org/10.1109/ISAPE.2006.353506","url":null,"abstract":"In this paper, a modified correlation coefficient algorithm is proposed to accomplish image-registration for repeat-pass SAR interferometry. This algorithm utilizes a new definition of correlation coefficient to improve the calculation accuracy of offset between two images. Our simulation shows that Doppler centroid has a significant influence on the correlation coefficient and it should be removed before registration. SIR-C/X X- band experimental data has been processed to demonstrate the effect of the proposed algorithm. Also quantitative comparison between this paper's results and the results from the maximum-spectrum method is presented to show the improvement.","PeriodicalId":113164,"journal":{"name":"2006 7th International Symposium on Antennas, Propagation & EM Theory","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116957474","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 : 2006-10-01DOI: 10.1109/ISAPE.2006.353475
Zhou Zou, Wang Hongyuan, Y. Guowen
This paper proposes an improved MUSIC algorithm with high-speed parallel optimization for FPGA. Although MUSIC algorithm is a high-performance, classic DOA method, it needs estimation and eigenstructure decomposition of covariance matrix, which is time-consuming with high computation cost and not suitable for FPGA implementations. In this paper, the authors present an optimization algorithm without the eigenstructure decomposition of the covariance matrix. This algorithm offers far lower computation cost compared to MUSIC at the expense of little performance decrease. With parallel preprocessing focusing on correlation matrices estimation and spectral peak search, an FPGA implementation is introduced, and proved to be efficient through theoretical analysis, simulation and hardware implementation.
{"title":"An Improved MUSIC Algorithm Implemented with High-speed Parallel Optimization for FPGA","authors":"Zhou Zou, Wang Hongyuan, Y. Guowen","doi":"10.1109/ISAPE.2006.353475","DOIUrl":"https://doi.org/10.1109/ISAPE.2006.353475","url":null,"abstract":"This paper proposes an improved MUSIC algorithm with high-speed parallel optimization for FPGA. Although MUSIC algorithm is a high-performance, classic DOA method, it needs estimation and eigenstructure decomposition of covariance matrix, which is time-consuming with high computation cost and not suitable for FPGA implementations. In this paper, the authors present an optimization algorithm without the eigenstructure decomposition of the covariance matrix. This algorithm offers far lower computation cost compared to MUSIC at the expense of little performance decrease. With parallel preprocessing focusing on correlation matrices estimation and spectral peak search, an FPGA implementation is introduced, and proved to be efficient through theoretical analysis, simulation and hardware implementation.","PeriodicalId":113164,"journal":{"name":"2006 7th International Symposium on Antennas, Propagation & EM Theory","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115141622","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 : 2006-10-01DOI: 10.1109/ISAPE.2006.353384
M. Hanqing, Li Simin, Ge Guangding
The genetic algorithm is employed to optimize the dual frequency matching network for a small size loop antenna. The antenna is optimized to work at 4~5MHz with VSWR less than 2.5 and 30 MHz VSWR less than 1.5, respectively. A real antenna is built and its test results are in good accordance with the calculated ones.
{"title":"A Dual Frequency Small Loop Antenna Based on Genetic Algorithm","authors":"M. Hanqing, Li Simin, Ge Guangding","doi":"10.1109/ISAPE.2006.353384","DOIUrl":"https://doi.org/10.1109/ISAPE.2006.353384","url":null,"abstract":"The genetic algorithm is employed to optimize the dual frequency matching network for a small size loop antenna. The antenna is optimized to work at 4~5MHz with VSWR less than 2.5 and 30 MHz VSWR less than 1.5, respectively. A real antenna is built and its test results are in good accordance with the calculated ones.","PeriodicalId":113164,"journal":{"name":"2006 7th International Symposium on Antennas, Propagation & EM Theory","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115353367","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 : 2006-10-01DOI: 10.1109/ISAPE.2006.353241
Pang Yongqiang, Wu Zhensen
Light scattering provides a powerful tool for bare substrate and thin films characterization. Angle-resolved light scattering has been used to quantify the surface roughness of optical components. However, light scattering properties are different between opaque substrate and transparent substrate because angle-resolved light scattering is affected by the contribution of both interfaces of the transparent substrate, it cannot be applied to transparent substrates. The light scattering properties of opaque and transparent substrate were described respectively in this paper and light scattering properties of transparent substrate were analyzed in detail considering of the effects of both interfaces of transparent substrate.
{"title":"Study of Light-scattering properties of bare substrates","authors":"Pang Yongqiang, Wu Zhensen","doi":"10.1109/ISAPE.2006.353241","DOIUrl":"https://doi.org/10.1109/ISAPE.2006.353241","url":null,"abstract":"Light scattering provides a powerful tool for bare substrate and thin films characterization. Angle-resolved light scattering has been used to quantify the surface roughness of optical components. However, light scattering properties are different between opaque substrate and transparent substrate because angle-resolved light scattering is affected by the contribution of both interfaces of the transparent substrate, it cannot be applied to transparent substrates. The light scattering properties of opaque and transparent substrate were described respectively in this paper and light scattering properties of transparent substrate were analyzed in detail considering of the effects of both interfaces of transparent substrate.","PeriodicalId":113164,"journal":{"name":"2006 7th International Symposium on Antennas, Propagation & EM Theory","volume":"147 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115742991","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 : 2006-10-01DOI: 10.1109/ISAPE.2006.353288
Jianqing Wang, Y. Nishikawa
With the rapid progress of electronic and information technology, an expectation for the realization of body area network (BAN) has risen. In this study, we proposed a pulse transmission system with frequencies at dozens of megahertzes. The system was based on an impulse radio (IR) scheme with bi-phase modulation. By using the frequency-dependent finite difference time domain (FD2TD) method, we investigated the on-body transmission characteristics and derived a path loss expression. We also investigated the influences of Gaussian noises and other narrow-band interferences on the communication link budget and bit error rate (BER) performance.
{"title":"A High-Frequency Pulse Transmission System on Human Body Area: Simulation and Analysis","authors":"Jianqing Wang, Y. Nishikawa","doi":"10.1109/ISAPE.2006.353288","DOIUrl":"https://doi.org/10.1109/ISAPE.2006.353288","url":null,"abstract":"With the rapid progress of electronic and information technology, an expectation for the realization of body area network (BAN) has risen. In this study, we proposed a pulse transmission system with frequencies at dozens of megahertzes. The system was based on an impulse radio (IR) scheme with bi-phase modulation. By using the frequency-dependent finite difference time domain (FD2TD) method, we investigated the on-body transmission characteristics and derived a path loss expression. We also investigated the influences of Gaussian noises and other narrow-band interferences on the communication link budget and bit error rate (BER) performance.","PeriodicalId":113164,"journal":{"name":"2006 7th International Symposium on Antennas, Propagation & EM Theory","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114773403","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 : 2006-10-01DOI: 10.1109/ISAPE.2006.353584
Caiyun Wang, Xiaojian Xu, S. Mao
Due to the aspect dependence of high resolution range profiles (HRRPs), traditional radar HRRPs target identification (ID) methods usually use averaged or weighted HRRPs as an aspect template. A major shortcoming is that HRRPs cannot provide information about target's cross-range. In this study, we present an application of statistics method on complex radar targets. The enhanced HRRPs extracted by this method were used in radar target identification. It is shown from simulation results that identification performance can be improved greatly by using the enhanced HRRPs features combined with a two-stage fuzzy classifier.
{"title":"A New Approach of Target Identification Using Enhanced Radar Range Profiles","authors":"Caiyun Wang, Xiaojian Xu, S. Mao","doi":"10.1109/ISAPE.2006.353584","DOIUrl":"https://doi.org/10.1109/ISAPE.2006.353584","url":null,"abstract":"Due to the aspect dependence of high resolution range profiles (HRRPs), traditional radar HRRPs target identification (ID) methods usually use averaged or weighted HRRPs as an aspect template. A major shortcoming is that HRRPs cannot provide information about target's cross-range. In this study, we present an application of statistics method on complex radar targets. The enhanced HRRPs extracted by this method were used in radar target identification. It is shown from simulation results that identification performance can be improved greatly by using the enhanced HRRPs features combined with a two-stage fuzzy classifier.","PeriodicalId":113164,"journal":{"name":"2006 7th International Symposium on Antennas, Propagation & EM Theory","volume":"196 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114865026","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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