Pub Date : 1900-01-01DOI: 10.1109/ISAPE.2003.1276720
Tang Song, Liu Qi-zhong
The facet noise in RCS prediction is studied in this paper. Faster speed of computation and higher accuracy is obtained with a proper facet model build. The number of facets needed to model a target increases with the size of the target and the frequency of the incident wave. The criterion of facetization is discussed and some helpful results are obtained.
{"title":"Facet noise in RCS prediction","authors":"Tang Song, Liu Qi-zhong","doi":"10.1109/ISAPE.2003.1276720","DOIUrl":"https://doi.org/10.1109/ISAPE.2003.1276720","url":null,"abstract":"The facet noise in RCS prediction is studied in this paper. Faster speed of computation and higher accuracy is obtained with a proper facet model build. The number of facets needed to model a target increases with the size of the target and the frequency of the incident wave. The criterion of facetization is discussed and some helpful results are obtained.","PeriodicalId":179885,"journal":{"name":"6th International SYmposium on Antennas, Propagation and EM Theory, 2003. Proceedings. 2003","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125134463","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 : 1900-01-01DOI: 10.1109/ISAPE.2003.1276723
W. Ewe, Lewei Li, M. Leong
This paper presents the adaptive integral method (AIM) to solve scattering problem of mixed dielectric/conducting object. The scattering problem is formulated using the Poggio-Miller-Chang-Harrington-Wu-Tsai (PMCHWT) and electric field integral equation approach for the dielectric and conducting body respectively. The integral equations using these approaches eliminate the interior resonance and produce accurate result. Method of moments (MOM) apply to discretize the integral equations. The resultant matrix system is solved by iterative solver with AIM. Numerical results are presented to demonstrate the accuracy and efficiency of the technique.
{"title":"Solution to scattering problem of composite conducting/dielectric body using adaptive integral method","authors":"W. Ewe, Lewei Li, M. Leong","doi":"10.1109/ISAPE.2003.1276723","DOIUrl":"https://doi.org/10.1109/ISAPE.2003.1276723","url":null,"abstract":"This paper presents the adaptive integral method (AIM) to solve scattering problem of mixed dielectric/conducting object. The scattering problem is formulated using the Poggio-Miller-Chang-Harrington-Wu-Tsai (PMCHWT) and electric field integral equation approach for the dielectric and conducting body respectively. The integral equations using these approaches eliminate the interior resonance and produce accurate result. Method of moments (MOM) apply to discretize the integral equations. The resultant matrix system is solved by iterative solver with AIM. Numerical results are presented to demonstrate the accuracy and efficiency of the technique.","PeriodicalId":179885,"journal":{"name":"6th International SYmposium on Antennas, Propagation and EM Theory, 2003. Proceedings. 2003","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131274472","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 : 1900-01-01DOI: 10.1109/ISAPE.2003.1276746
Lu Xun, Hou De-tin, Zhou Dong-fang, Niu Zhong-xia, Wang Yu-guang, Li Shi-zheng
In this paper, air breakdown by high power microwave pulse is modeled using the parameters between electrons and air neutral molecules. When high power microwave (HPM) pulse propagates in self-generated plasma, the influence of plasma can't be omitted.
{"title":"Research on high power microwave pulse in the air breakdown","authors":"Lu Xun, Hou De-tin, Zhou Dong-fang, Niu Zhong-xia, Wang Yu-guang, Li Shi-zheng","doi":"10.1109/ISAPE.2003.1276746","DOIUrl":"https://doi.org/10.1109/ISAPE.2003.1276746","url":null,"abstract":"In this paper, air breakdown by high power microwave pulse is modeled using the parameters between electrons and air neutral molecules. When high power microwave (HPM) pulse propagates in self-generated plasma, the influence of plasma can't be omitted.","PeriodicalId":179885,"journal":{"name":"6th International SYmposium on Antennas, Propagation and EM Theory, 2003. Proceedings. 2003","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131360665","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 : 1900-01-01DOI: 10.1109/ISAPE.2003.1276675
Yi Zhan, Qiang Chen, Zewei Zhang
This paper describes a small uniform circular array (UCA) designed for super-resolution direction finding and spatial signal separation. The experiment results with the UCA reveal there are considerable differences on accuracy, resolution capacity and other performances between theoretical predicted and measured results. We find array errors are the main reasons that make such differences. Several error estimation techniques are developed. Examples shown in this paper demonstrate the performances can get a great improvement after compensation. Thus, the major benefits of using such system in radio communication system are confirmed.
{"title":"An experimental study of a small signal processing array","authors":"Yi Zhan, Qiang Chen, Zewei Zhang","doi":"10.1109/ISAPE.2003.1276675","DOIUrl":"https://doi.org/10.1109/ISAPE.2003.1276675","url":null,"abstract":"This paper describes a small uniform circular array (UCA) designed for super-resolution direction finding and spatial signal separation. The experiment results with the UCA reveal there are considerable differences on accuracy, resolution capacity and other performances between theoretical predicted and measured results. We find array errors are the main reasons that make such differences. Several error estimation techniques are developed. Examples shown in this paper demonstrate the performances can get a great improvement after compensation. Thus, the major benefits of using such system in radio communication system are confirmed.","PeriodicalId":179885,"journal":{"name":"6th International SYmposium on Antennas, Propagation and EM Theory, 2003. Proceedings. 2003","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127007990","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 : 1900-01-01DOI: 10.1109/ISAPE.2003.1276735
G. Lixin, Guan Xiuguo
Based on the Kirchhoff approximation for rough surface scattering and by calculating the shadowing function of the rough surface, the formula of the scattering cross section of the fractal rough surface is present with consideration of the shadowing effect. The influence of the shadowing effect on the bistatic scattering cross section for different fractal dimension and fundamental spatial frequency is discussed in detail.
{"title":"Study on the electromagnetic scattering from the fractal surface with considering the shadowing effect","authors":"G. Lixin, Guan Xiuguo","doi":"10.1109/ISAPE.2003.1276735","DOIUrl":"https://doi.org/10.1109/ISAPE.2003.1276735","url":null,"abstract":"Based on the Kirchhoff approximation for rough surface scattering and by calculating the shadowing function of the rough surface, the formula of the scattering cross section of the fractal rough surface is present with consideration of the shadowing effect. The influence of the shadowing effect on the bistatic scattering cross section for different fractal dimension and fundamental spatial frequency is discussed in detail.","PeriodicalId":179885,"journal":{"name":"6th International SYmposium on Antennas, Propagation and EM Theory, 2003. Proceedings. 2003","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134283126","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 : 1900-01-01DOI: 10.1109/ISAPE.2003.1276710
H. Weidong, Sun Houjun, Lv Xin, Deng Ciping
While stealth technologies for large scale targets were researched, RCS static measurement method was adopted, which is often used under non-far field condition. Therefore a theoretical premise was deduced, and a stepped frequency pulse compression system was designed for RCS measurement, especially a novel RF channel was designed to keep the system stable. Not only the simulation but also the experimental result is presented LU the paper; at the same time, some practical difficulties are designated.
{"title":"Research on RCS measurement under non-far field condition","authors":"H. Weidong, Sun Houjun, Lv Xin, Deng Ciping","doi":"10.1109/ISAPE.2003.1276710","DOIUrl":"https://doi.org/10.1109/ISAPE.2003.1276710","url":null,"abstract":"While stealth technologies for large scale targets were researched, RCS static measurement method was adopted, which is often used under non-far field condition. Therefore a theoretical premise was deduced, and a stepped frequency pulse compression system was designed for RCS measurement, especially a novel RF channel was designed to keep the system stable. Not only the simulation but also the experimental result is presented LU the paper; at the same time, some practical difficulties are designated.","PeriodicalId":179885,"journal":{"name":"6th International SYmposium on Antennas, Propagation and EM Theory, 2003. Proceedings. 2003","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133046860","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 : 1900-01-01DOI: 10.1109/ISAPE.2003.1276800
Yin Hongcheng, Xun Yanping, Chao Zengming
This paper presents an extension of the free-space method for measurement of bi-axial anisotropic material at microwave frequencies. In this method, four complex transverse constitutive parameters are directly computed from the reflection and transmission coefficients of a planar sample in free space for a normally incident plane wave with two polarizations. By using the measured amplitudes of the reflection and transmission coefficients of a planar sample at six incident angles with two polarizations, two complex longitudinal constitutive parameters are obtained by finding the solution to minimize the properly designed objective function under the suitable judging criterion. The numerical trials are carried out for a high-loss material by joining random errors to simulate the real measurement condition, which verifies the validity of this method.
{"title":"Free-space measurement of bi-axial anisotropic materials","authors":"Yin Hongcheng, Xun Yanping, Chao Zengming","doi":"10.1109/ISAPE.2003.1276800","DOIUrl":"https://doi.org/10.1109/ISAPE.2003.1276800","url":null,"abstract":"This paper presents an extension of the free-space method for measurement of bi-axial anisotropic material at microwave frequencies. In this method, four complex transverse constitutive parameters are directly computed from the reflection and transmission coefficients of a planar sample in free space for a normally incident plane wave with two polarizations. By using the measured amplitudes of the reflection and transmission coefficients of a planar sample at six incident angles with two polarizations, two complex longitudinal constitutive parameters are obtained by finding the solution to minimize the properly designed objective function under the suitable judging criterion. The numerical trials are carried out for a high-loss material by joining random errors to simulate the real measurement condition, which verifies the validity of this method.","PeriodicalId":179885,"journal":{"name":"6th International SYmposium on Antennas, Propagation and EM Theory, 2003. Proceedings. 2003","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115459753","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 : 1900-01-01DOI: 10.1109/ISAPE.2003.1276658
Lin Ze Xiang, Lin Tao, Tang Kai Tai
The sphere interferometer antenna array is described in this paper. Such antenna from S band to Ku band has been designed, fabricated and tested over a wide range of incidence angles. The measurements results of the mechanical and electrical performance show that this prototype antenna can meet with the request of real application.
{"title":"Sphere interferometer antenna array","authors":"Lin Ze Xiang, Lin Tao, Tang Kai Tai","doi":"10.1109/ISAPE.2003.1276658","DOIUrl":"https://doi.org/10.1109/ISAPE.2003.1276658","url":null,"abstract":"The sphere interferometer antenna array is described in this paper. Such antenna from S band to Ku band has been designed, fabricated and tested over a wide range of incidence angles. The measurements results of the mechanical and electrical performance show that this prototype antenna can meet with the request of real application.","PeriodicalId":179885,"journal":{"name":"6th International SYmposium on Antennas, Propagation and EM Theory, 2003. Proceedings. 2003","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115566848","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 : 1900-01-01DOI: 10.1109/ISAPE.2003.1276807
Z. Fedorova, V. I. Sergeev, E. A. Sergeeva, V. Shevchenko, I. Volodin
Packs of short EHF pulses is the effect of electromagnetic wave energy to object because of high power and frequency of repetition. To solve this problem, generator scheme called incitanter amplifier is proposed in this paper. Such incitanter consists of EHF generator and amplifier with striping filter. EHF generator forms the sinusoidal signal which frequency reforms in chosen band of the frequencies. The incitanter also comprises of functional blocks: frequency-phase manipulator, selective filter of small power signal, and amplifying block.
{"title":"About generations packs of powerful short pulses with big frequency of the repetition","authors":"Z. Fedorova, V. I. Sergeev, E. A. Sergeeva, V. Shevchenko, I. Volodin","doi":"10.1109/ISAPE.2003.1276807","DOIUrl":"https://doi.org/10.1109/ISAPE.2003.1276807","url":null,"abstract":"Packs of short EHF pulses is the effect of electromagnetic wave energy to object because of high power and frequency of repetition. To solve this problem, generator scheme called incitanter amplifier is proposed in this paper. Such incitanter consists of EHF generator and amplifier with striping filter. EHF generator forms the sinusoidal signal which frequency reforms in chosen band of the frequencies. The incitanter also comprises of functional blocks: frequency-phase manipulator, selective filter of small power signal, and amplifying block.","PeriodicalId":179885,"journal":{"name":"6th International SYmposium on Antennas, Propagation and EM Theory, 2003. Proceedings. 2003","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114091480","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 : 1900-01-01DOI: 10.1109/ISAPE.2003.1276708
J. Lee, S. Yun, Y. Kirn, Jong-Heung Park, J. Eun, S. Lee
Several error tests were mode at the elevated far-field antenna range of 8.6 meter distance between AUT and range antenna, and the planar near-field range of 3.5 m /spl times/ 3.5m in anechoic chamber, as a parts of two range validations used for development guideline of communications broadcasting satellite (CBS) dual offset reflector antenna with the orbit/FR model including positioner and scanner of planar near-field antenna range, and the transmission roll of far-field antenna range. The far-field and planar near-field antenna range tests were performed with standard gain horn, and dual offset satellite reflector antenna at 21 GHz frequency. This paper describes the error source, test method and test result at far-field and near-field antenna range.
{"title":"Error testing at planar near-field and far-field range of anechoic chamber","authors":"J. Lee, S. Yun, Y. Kirn, Jong-Heung Park, J. Eun, S. Lee","doi":"10.1109/ISAPE.2003.1276708","DOIUrl":"https://doi.org/10.1109/ISAPE.2003.1276708","url":null,"abstract":"Several error tests were mode at the elevated far-field antenna range of 8.6 meter distance between AUT and range antenna, and the planar near-field range of 3.5 m /spl times/ 3.5m in anechoic chamber, as a parts of two range validations used for development guideline of communications broadcasting satellite (CBS) dual offset reflector antenna with the orbit/FR model including positioner and scanner of planar near-field antenna range, and the transmission roll of far-field antenna range. The far-field and planar near-field antenna range tests were performed with standard gain horn, and dual offset satellite reflector antenna at 21 GHz frequency. This paper describes the error source, test method and test result at far-field and near-field antenna range.","PeriodicalId":179885,"journal":{"name":"6th International SYmposium on Antennas, Propagation and EM Theory, 2003. Proceedings. 2003","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114556915","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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