Pub Date : 1900-01-01DOI: 10.1109/ISAPE.2003.1276742
Hou De-tin, Hu Tao, Jiang Chang-yi, Zhou Dong-fang, Wang Gong-lin
When high power microwave is propagating in atmosphere, the effect of atmospheric refraction will take place and the extent of it mainly depends on the variation gradient of refractive index and the initial quadrant elevation according to path. Based on the lower atmosphere section data, this paper divides the propagation trace of high power microwave when the atmosphere is not breakdown by some points, get the quadrant elevation, altitude, geocentric separation angle from every points to the target point and the true distance from every points to the emission point and realize simulation of high power microwave propagation trace in atmosphere.
{"title":"Numerical calculation of high power microwave propagation trace in atmosphere","authors":"Hou De-tin, Hu Tao, Jiang Chang-yi, Zhou Dong-fang, Wang Gong-lin","doi":"10.1109/ISAPE.2003.1276742","DOIUrl":"https://doi.org/10.1109/ISAPE.2003.1276742","url":null,"abstract":"When high power microwave is propagating in atmosphere, the effect of atmospheric refraction will take place and the extent of it mainly depends on the variation gradient of refractive index and the initial quadrant elevation according to path. Based on the lower atmosphere section data, this paper divides the propagation trace of high power microwave when the atmosphere is not breakdown by some points, get the quadrant elevation, altitude, geocentric separation angle from every points to the target point and the true distance from every points to the emission point and realize simulation of high power microwave propagation trace in atmosphere.","PeriodicalId":179885,"journal":{"name":"6th International SYmposium on Antennas, Propagation and EM Theory, 2003. Proceedings. 2003","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117228905","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.2003.1276726
Jin Ming, Qiao Xiaolin, Zhao Yinan, Jia Shilou
Angular glint caused by a target of dual point sources is discussed in phase gradient method. Deterministic relation between phase gradient and RCS is deduced. On the basis of that, a RCS based compensation method of angular glint is presented. The validity is verified by simulation. For target of multi-point sources, compensation for angular glint error is similar if it is treated as a target of dual point sources.
{"title":"Analyses and compensation for radar target angular glint","authors":"Jin Ming, Qiao Xiaolin, Zhao Yinan, Jia Shilou","doi":"10.1109/ISAPE.2003.1276726","DOIUrl":"https://doi.org/10.1109/ISAPE.2003.1276726","url":null,"abstract":"Angular glint caused by a target of dual point sources is discussed in phase gradient method. Deterministic relation between phase gradient and RCS is deduced. On the basis of that, a RCS based compensation method of angular glint is presented. The validity is verified by simulation. For target of multi-point sources, compensation for angular glint error is similar if it is treated as a target of dual point sources.","PeriodicalId":179885,"journal":{"name":"6th International SYmposium on Antennas, Propagation and EM Theory, 2003. Proceedings. 2003","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116616797","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.2003.1276671
Ling-Ling Wang, D. Fang
An approach based on a combination of genetic algorithm and fast Fourier transform is presented for array failure correction. It speeds up the evaluation of array pattern by using FFT, so it provides the possibility to speed up the GA. Simulation results demonstrate its effectiveness.
{"title":"Combination of genetic algorithm and fast Fourier transform for array failure correction","authors":"Ling-Ling Wang, D. Fang","doi":"10.1109/ISAPE.2003.1276671","DOIUrl":"https://doi.org/10.1109/ISAPE.2003.1276671","url":null,"abstract":"An approach based on a combination of genetic algorithm and fast Fourier transform is presented for array failure correction. It speeds up the evaluation of array pattern by using FFT, so it provides the possibility to speed up the GA. Simulation results demonstrate its effectiveness.","PeriodicalId":179885,"journal":{"name":"6th International SYmposium on Antennas, Propagation and EM Theory, 2003. Proceedings. 2003","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116686095","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.2003.1276721
T. Sengor
Surface currents induced by high-frequency whispering gallery waves on a spherically curved impedance sheet having different impedance faces are obtained. The influences of several diffraction phenomena on surface currents are given explicitly. The causes and forms of surface currents are described, and the scattered fields are determined from those currents. The results explain the contribution of surface currents to the scattered field in a quite simple form. When the impedance tends to zero the expressions reduce to those of the perfectly conducting sheet. The results are independent of the actual source configuration and applicable to more complicated scattering and inverse scattering phenomena.
{"title":"Surface currents and diffraction of whispering gallery modes by a spherical impedance cap","authors":"T. Sengor","doi":"10.1109/ISAPE.2003.1276721","DOIUrl":"https://doi.org/10.1109/ISAPE.2003.1276721","url":null,"abstract":"Surface currents induced by high-frequency whispering gallery waves on a spherically curved impedance sheet having different impedance faces are obtained. The influences of several diffraction phenomena on surface currents are given explicitly. The causes and forms of surface currents are described, and the scattered fields are determined from those currents. The results explain the contribution of surface currents to the scattered field in a quite simple form. When the impedance tends to zero the expressions reduce to those of the perfectly conducting sheet. The results are independent of the actual source configuration and applicable to more complicated scattering and inverse scattering phenomena.","PeriodicalId":179885,"journal":{"name":"6th International SYmposium on Antennas, Propagation and EM Theory, 2003. Proceedings. 2003","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123780378","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.2003.1276649
Dong Tao, Xu Xiao-wen, Xiao Jiang
The reflector antenna distortion model is built by explosion test results. The radiation characteristics of a kind of distorted shaped reflector antenna are computed by using PTD method, and the radiation characteristics of the reflector antenna with holes on the surface are also computed. Good results are achieved, which can provide theoretical guidance for the radar attackers.
{"title":"Analysis of the radiation characteristics of the reflector antenna with surface distortion and holes using PTD","authors":"Dong Tao, Xu Xiao-wen, Xiao Jiang","doi":"10.1109/ISAPE.2003.1276649","DOIUrl":"https://doi.org/10.1109/ISAPE.2003.1276649","url":null,"abstract":"The reflector antenna distortion model is built by explosion test results. The radiation characteristics of a kind of distorted shaped reflector antenna are computed by using PTD method, and the radiation characteristics of the reflector antenna with holes on the surface are also computed. Good results are achieved, which can provide theoretical guidance for the radar attackers.","PeriodicalId":179885,"journal":{"name":"6th International SYmposium on Antennas, Propagation and EM Theory, 2003. Proceedings. 2003","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125164603","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":"7 1","pages":"0"},"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}
Pub Date : 1900-01-01DOI: 10.1109/ISAPE.2003.1276812
A. Butrym, Zheng Yu, O. Tretyakov
The paper is dealt with pulse wave propagation in a waveguide uniformly loaded with lossy medium. Maxwell's equations are solved directly in time-domain by modal basis method [O.A. Tretyakov, 1989, 1993, 2002]. Electromagnetic fields of the time-domain modes are products of some functions of the transverse waveguide coordinates, which originate the modal basis, and the modal amplitudes, which are some functions of axial coordinate z and time t. Modal amplitudes are governed by evolutionary equations which can be reduced to the Klein-Gordon's equation. The solution to this equation is written in the integral form. The energy flow is under study. Some diagrams with space-time distributions of energy density and energy flow speed are plotted for Lagerr impulse wave propagation.
{"title":"Energy flow in lossy waveguides for impulse wave propagation","authors":"A. Butrym, Zheng Yu, O. Tretyakov","doi":"10.1109/ISAPE.2003.1276812","DOIUrl":"https://doi.org/10.1109/ISAPE.2003.1276812","url":null,"abstract":"The paper is dealt with pulse wave propagation in a waveguide uniformly loaded with lossy medium. Maxwell's equations are solved directly in time-domain by modal basis method [O.A. Tretyakov, 1989, 1993, 2002]. Electromagnetic fields of the time-domain modes are products of some functions of the transverse waveguide coordinates, which originate the modal basis, and the modal amplitudes, which are some functions of axial coordinate z and time t. Modal amplitudes are governed by evolutionary equations which can be reduced to the Klein-Gordon's equation. The solution to this equation is written in the integral form. The energy flow is under study. Some diagrams with space-time distributions of energy density and energy flow speed are plotted for Lagerr impulse wave propagation.","PeriodicalId":179885,"journal":{"name":"6th International SYmposium on Antennas, Propagation and EM Theory, 2003. Proceedings. 2003","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129844653","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.2003.1276802
Qin Zhi-an, Zhong Hai-yang
A new method for solving Maxwell equations of electromagnetic field in chiral media is presented. By using this method, the problem of solving the non-divergence electromagnetic field in chiral media can be transformed into the problem for solving a scalar equation.
{"title":"An approach for solving maxwell equations of electromagnetic field in chiral media","authors":"Qin Zhi-an, Zhong Hai-yang","doi":"10.1109/ISAPE.2003.1276802","DOIUrl":"https://doi.org/10.1109/ISAPE.2003.1276802","url":null,"abstract":"A new method for solving Maxwell equations of electromagnetic field in chiral media is presented. By using this method, the problem of solving the non-divergence electromagnetic field in chiral media can be transformed into the problem for solving a scalar equation.","PeriodicalId":179885,"journal":{"name":"6th International SYmposium on Antennas, Propagation and EM Theory, 2003. Proceedings. 2003","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129872580","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":"212 ","pages":"0"},"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.2003.1276711
Jin Yongqi, H. Guoyu, X. Ding
In this paper is presented a new technique to improve the VCO linearity by resampling the measured IF signal in short-range frequency modulated continuous wave (FM/CW) radar based on a known reflecting reference, which caused intentionally by a specially fabricated paraboloidal antenna. The basic principle and special attention are given in following discussion. Moreover, a confirmed experiment in microwave non-reflective chamber is simulated. The result shows the feasibility of our self-made antenna and this method satisfactorily.
{"title":"A new realizable technique to improve the VCO linearity","authors":"Jin Yongqi, H. Guoyu, X. Ding","doi":"10.1109/ISAPE.2003.1276711","DOIUrl":"https://doi.org/10.1109/ISAPE.2003.1276711","url":null,"abstract":"In this paper is presented a new technique to improve the VCO linearity by resampling the measured IF signal in short-range frequency modulated continuous wave (FM/CW) radar based on a known reflecting reference, which caused intentionally by a specially fabricated paraboloidal antenna. The basic principle and special attention are given in following discussion. Moreover, a confirmed experiment in microwave non-reflective chamber is simulated. The result shows the feasibility of our self-made antenna and this method satisfactorily.","PeriodicalId":179885,"journal":{"name":"6th International SYmposium on Antennas, Propagation and EM Theory, 2003. Proceedings. 2003","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122222502","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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