Pub Date : 1986-06-08DOI: 10.1109/APS.1986.1149712
M. Calvo, J. Molina, R. Lois
{"title":"Fast analysis of multimode conical horns by bessel-jacobi series method","authors":"M. Calvo, J. Molina, R. Lois","doi":"10.1109/APS.1986.1149712","DOIUrl":"https://doi.org/10.1109/APS.1986.1149712","url":null,"abstract":"","PeriodicalId":399329,"journal":{"name":"1986 Antennas and Propagation Society International Symposium","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133620994","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 : 1986-06-08DOI: 10.1109/APS.1986.1149743
Y. Antar, L. Allan
{"title":"Backscattering characteristics of dielectric targets at 9.6 GHz","authors":"Y. Antar, L. Allan","doi":"10.1109/APS.1986.1149743","DOIUrl":"https://doi.org/10.1109/APS.1986.1149743","url":null,"abstract":"","PeriodicalId":399329,"journal":{"name":"1986 Antennas and Propagation Society International Symposium","volume":"8 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132339584","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 : 1986-06-08DOI: 10.1109/APS.1986.1149682
V. Shahmirian, S. Kesler
INTRODUCTION One of the primary purposes of radar sensor arrays is the determination of hearings of clmely spaced radiating sources. DiEiculties arise when, in addition to direct paths there exist multipath components in the received signal. Multipath components are scaled and delayed replica of the direct signal, propagating a t the same frequency and are fully correlated with the direct received signals.
{"title":"Sensitivity of the high-resolution eigenanalysis methods to estimated number of sources","authors":"V. Shahmirian, S. Kesler","doi":"10.1109/APS.1986.1149682","DOIUrl":"https://doi.org/10.1109/APS.1986.1149682","url":null,"abstract":"INTRODUCTION One of the primary purposes of radar sensor arrays is the determination of hearings of clmely spaced radiating sources. DiEiculties arise when, in addition to direct paths there exist multipath components in the received signal. Multipath components are scaled and delayed replica of the direct signal, propagating a t the same frequency and are fully correlated with the direct received signals.","PeriodicalId":399329,"journal":{"name":"1986 Antennas and Propagation Society International Symposium","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134428175","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 : 1986-06-08DOI: 10.1109/APS.1986.1149583
H. Lai, L. Bryans
{"title":"A low-sidelobe offset gregorian reflector","authors":"H. Lai, L. Bryans","doi":"10.1109/APS.1986.1149583","DOIUrl":"https://doi.org/10.1109/APS.1986.1149583","url":null,"abstract":"","PeriodicalId":399329,"journal":{"name":"1986 Antennas and Propagation Society International Symposium","volume":"131 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123168165","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 : 1986-06-08DOI: 10.1109/APS.1986.1149585
H.-M. Lee
{"title":"Time-domain radiation from an aperture","authors":"H.-M. Lee","doi":"10.1109/APS.1986.1149585","DOIUrl":"https://doi.org/10.1109/APS.1986.1149585","url":null,"abstract":"","PeriodicalId":399329,"journal":{"name":"1986 Antennas and Propagation Society International Symposium","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114817168","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 : 1986-06-08DOI: 10.1109/APS.1986.1149671
K. Woo
{"title":"Multiple beam antenna feed development","authors":"K. Woo","doi":"10.1109/APS.1986.1149671","DOIUrl":"https://doi.org/10.1109/APS.1986.1149671","url":null,"abstract":"","PeriodicalId":399329,"journal":{"name":"1986 Antennas and Propagation Society International Symposium","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115191565","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 : 1986-06-08DOI: 10.1109/APS.1986.1149654
H. Shigesawa, M. Nishimura
{"title":"Surface current and receiving characteristics of reflector antennas","authors":"H. Shigesawa, M. Nishimura","doi":"10.1109/APS.1986.1149654","DOIUrl":"https://doi.org/10.1109/APS.1986.1149654","url":null,"abstract":"","PeriodicalId":399329,"journal":{"name":"1986 Antennas and Propagation Society International Symposium","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116837525","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 : 1986-06-08DOI: 10.1109/APS.1986.1149620
H. Viskum
Introduction. Althou h eometrical optics (GO) is an asymptotic theory describyears constituted the foundation for synthesis of reflector antennas. While dual ing electromagnetic #e& of infinitely high frequencies only, it has for several reflectors are usually shaped to produce a certain aperture distribution leading to a pencil beam type pattern with high gain or low side lobes, etc., single reflectors field. In either of the cases, any design must necessarily be ver!fied by a diffracmay be syntheslsed to generate shaped beams by using the GO directly in the far tion analysis, because of the GO assumption made In the synthesis. In this paper we will demonstrate a numerical method for solving the synthesis problem for single reflector antennas. The technique has been found to be superior to what has reviously been applied, in particular because it returns the solution on a form wlich lends itself easily t o diffraction analysis. This is accomplished by solvin Westcott's synthesis problem usin a collocation method and an expansion of t l e reflector surface in bicubicspline?unctions. The theory will be resumed very briefly, and we wiU then present some results figuration, a reflector shaped to provide full earth coverage from a low orbitting from applying the developed synthesis and analysis programs to a particular consatellite. Formulation of the synthesis. As stated previously, the synthesis part of this study is based upon the work of Westcott (1983). To formulate the problem we of the coordinate system. The half angle subtended by the reflector at the feed is consider the reflector shown in fig. 1, illuminated by a feed located at the centre €Ic. Given the feed power densit pattern I(e,+), we require the reflector t o G(B. a) inside the far-field cone of half angle Of. Westcott showed that by using transform this pattern into a far-fie& pattern with a power density distribution an appropriate parametrization of the reflectoer surface one can derive a highly non-linear boundary value problem, the solution of which overns the reflector surface. He also showed how the non-linear problem couqd be linearized and solved by repeated solution of linear second order partial differential equations (POE'S).
{"title":"Synthesis and analysis of single shaped reflector antennas","authors":"H. Viskum","doi":"10.1109/APS.1986.1149620","DOIUrl":"https://doi.org/10.1109/APS.1986.1149620","url":null,"abstract":"Introduction. Althou h eometrical optics (GO) is an asymptotic theory describyears constituted the foundation for synthesis of reflector antennas. While dual ing electromagnetic #e& of infinitely high frequencies only, it has for several reflectors are usually shaped to produce a certain aperture distribution leading to a pencil beam type pattern with high gain or low side lobes, etc., single reflectors field. In either of the cases, any design must necessarily be ver!fied by a diffracmay be syntheslsed to generate shaped beams by using the GO directly in the far tion analysis, because of the GO assumption made In the synthesis. In this paper we will demonstrate a numerical method for solving the synthesis problem for single reflector antennas. The technique has been found to be superior to what has reviously been applied, in particular because it returns the solution on a form wlich lends itself easily t o diffraction analysis. This is accomplished by solvin Westcott's synthesis problem usin a collocation method and an expansion of t l e reflector surface in bicubicspline?unctions. The theory will be resumed very briefly, and we wiU then present some results figuration, a reflector shaped to provide full earth coverage from a low orbitting from applying the developed synthesis and analysis programs to a particular consatellite. Formulation of the synthesis. As stated previously, the synthesis part of this study is based upon the work of Westcott (1983). To formulate the problem we of the coordinate system. The half angle subtended by the reflector at the feed is consider the reflector shown in fig. 1, illuminated by a feed located at the centre €Ic. Given the feed power densit pattern I(e,+), we require the reflector t o G(B. a) inside the far-field cone of half angle Of. Westcott showed that by using transform this pattern into a far-fie& pattern with a power density distribution an appropriate parametrization of the reflectoer surface one can derive a highly non-linear boundary value problem, the solution of which overns the reflector surface. He also showed how the non-linear problem couqd be linearized and solved by repeated solution of linear second order partial differential equations (POE'S).","PeriodicalId":399329,"journal":{"name":"1986 Antennas and Propagation Society International Symposium","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116844047","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 : 1986-06-08DOI: 10.1109/APS.1986.1149676
R. Janaswamy, D. Schaubert
A method for calculating the radiation pattern of end-fire tapered slot antennas with or without dielectric substrate is presented. The method involves a two-step procedure: 1) determine the field distribution of a traveling wave along the tapered slot, and 2) compute the radiation from this slot field by using the half-plane Green's function to account for termination effects. Acceptable estimates of the slot field usually can be obtained from a stepped approximation to the tapered geometry. The method has been verified by comparisons to measured patterns for various dielectric substrates and antenna dimensions. However, the effect of lateral truncation has not yet been successfully modeled. Experimental patterns showing this effect are presented.
{"title":"Analysis of the tapered slot antenna","authors":"R. Janaswamy, D. Schaubert","doi":"10.1109/APS.1986.1149676","DOIUrl":"https://doi.org/10.1109/APS.1986.1149676","url":null,"abstract":"A method for calculating the radiation pattern of end-fire tapered slot antennas with or without dielectric substrate is presented. The method involves a two-step procedure: 1) determine the field distribution of a traveling wave along the tapered slot, and 2) compute the radiation from this slot field by using the half-plane Green's function to account for termination effects. Acceptable estimates of the slot field usually can be obtained from a stepped approximation to the tapered geometry. The method has been verified by comparisons to measured patterns for various dielectric substrates and antenna dimensions. However, the effect of lateral truncation has not yet been successfully modeled. Experimental patterns showing this effect are presented.","PeriodicalId":399329,"journal":{"name":"1986 Antennas and Propagation Society International Symposium","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114994378","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 : 1986-06-08DOI: 10.1109/APS.1986.1149631
S. Peng, S. Xu, F. Schwering
{"title":"Omni-directional periodic rod antenna","authors":"S. Peng, S. Xu, F. Schwering","doi":"10.1109/APS.1986.1149631","DOIUrl":"https://doi.org/10.1109/APS.1986.1149631","url":null,"abstract":"","PeriodicalId":399329,"journal":{"name":"1986 Antennas and Propagation Society International Symposium","volume":"274 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1986-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121209176","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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