RCS (radar cross section) computation has been a main area of research work at the Syracuse Research Corporation (SRC) for a number of years. Sponsorships of projects in a variety of application areas over the years have made continuous research work possible in the field of electromagnetic scattering and the accompanying simulation software development. SRC's work to date in this area is summarized. Particular attention is given to the active library concept for target identification. An RCS prediction software named SRCRCS and an accompanying CAD modeling package named SCAMP are discussed. Applications of the simulation software are considered.<>
{"title":"RCS computation at the Syracuse Research Corporation","authors":"Chao Chung-chi","doi":"10.1109/APS.1992.221760","DOIUrl":"https://doi.org/10.1109/APS.1992.221760","url":null,"abstract":"RCS (radar cross section) computation has been a main area of research work at the Syracuse Research Corporation (SRC) for a number of years. Sponsorships of projects in a variety of application areas over the years have made continuous research work possible in the field of electromagnetic scattering and the accompanying simulation software development. SRC's work to date in this area is summarized. Particular attention is given to the active library concept for target identification. An RCS prediction software named SRCRCS and an accompanying CAD modeling package named SCAMP are discussed. Applications of the simulation software are considered.<<ETX>>","PeriodicalId":289865,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium 1992 Digest","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126604920","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}
A newly developed generalized reflector/feed(s) diffraction synthesis methodology that is capable of synthesizing various antenna configurations effectively is presented. Based on this synthesis method, the feasibility of several CBRA (contour beam reflector antenna) configurations, such as a paraboloidal reflector fed by a large array, a shaped reflector illuminated by a single feed, and a shaped reflector fed by a small, array, are properly assessed for a representative application in a unified fashion. Numerical examples are given to illustrate CBRA synthesis for a challenging and difficult contour coverage-the US Eastern Time Zone.<>
{"title":"Reflector/feed(s) synthesis challenges for satellite contour beam applications","authors":"D. Duan, Y. Rahmat-Samii","doi":"10.1109/APS.1992.221940","DOIUrl":"https://doi.org/10.1109/APS.1992.221940","url":null,"abstract":"A newly developed generalized reflector/feed(s) diffraction synthesis methodology that is capable of synthesizing various antenna configurations effectively is presented. Based on this synthesis method, the feasibility of several CBRA (contour beam reflector antenna) configurations, such as a paraboloidal reflector fed by a large array, a shaped reflector illuminated by a single feed, and a shaped reflector fed by a small, array, are properly assessed for a representative application in a unified fashion. Numerical examples are given to illustrate CBRA synthesis for a challenging and difficult contour coverage-the US Eastern Time Zone.<<ETX>>","PeriodicalId":289865,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium 1992 Digest","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126719126","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}
An iterative design procedure taking into account the different scan performance in the E- and H-planes of strip element microstrip phased arrays is presented. The phased array model considered consists of perfectly conducting periodically spaced infinite strips of infinitesimal thickness on top of a grounded dielectric substrate. The strips are excited by ribbon current probes. Applying a linear phase taper simultaneously along the E- and H-planes allows the beam to be scanned in any arbitrary direction. Numerical results show the feasibility of a voltage standing wave ratio of less than two for a maximum scan of 40 degrees in the E-, H-, and D-planes and in a frequency band of +or-9%.<>
{"title":"3D scan performance of strip element microstrip phased arrays","authors":"C. Nehra, A. Hessel, J. Shmoys, H. Stalzer","doi":"10.1109/APS.1992.221630","DOIUrl":"https://doi.org/10.1109/APS.1992.221630","url":null,"abstract":"An iterative design procedure taking into account the different scan performance in the E- and H-planes of strip element microstrip phased arrays is presented. The phased array model considered consists of perfectly conducting periodically spaced infinite strips of infinitesimal thickness on top of a grounded dielectric substrate. The strips are excited by ribbon current probes. Applying a linear phase taper simultaneously along the E- and H-planes allows the beam to be scanned in any arbitrary direction. Numerical results show the feasibility of a voltage standing wave ratio of less than two for a maximum scan of 40 degrees in the E-, H-, and D-planes and in a frequency band of +or-9%.<<ETX>>","PeriodicalId":289865,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium 1992 Digest","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115036536","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 authors propose a novel microstrip antenna which has broad bandwidth and small size. An excellent example of this microstrip antenna, a slender base station antenna, is shown. The double-layered broadband microstrip configuration yields a bandwidth of 17% at a voltage standing wave ratio of 1.5. The antenna width is extremely small at about 40 mm. The 120 degrees beamwidth in the horizontal plane is achieved by employing a 100-mm-width ground plane. A slender base station antenna covered with a 160-mm-diameter cylindrical radome has been constructed and tested. The measured radiation characteristics are satisfactory.<>
{"title":"A wide-band and slender base-station antenna for mobile radio","authors":"Y. Yamada, M. Kijima, H. Kimura","doi":"10.1109/APS.1992.221589","DOIUrl":"https://doi.org/10.1109/APS.1992.221589","url":null,"abstract":"The authors propose a novel microstrip antenna which has broad bandwidth and small size. An excellent example of this microstrip antenna, a slender base station antenna, is shown. The double-layered broadband microstrip configuration yields a bandwidth of 17% at a voltage standing wave ratio of 1.5. The antenna width is extremely small at about 40 mm. The 120 degrees beamwidth in the horizontal plane is achieved by employing a 100-mm-width ground plane. A slender base station antenna covered with a 160-mm-diameter cylindrical radome has been constructed and tested. The measured radiation characteristics are satisfactory.<<ETX>>","PeriodicalId":289865,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium 1992 Digest","volume":"267 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115207292","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 exact eigenfunction solution is obtained for the two-dimensional problem of the scattering of a plane electromagnetic wave by a slotted semielliptical channel in an infinite ground plane. Specifically, the canonical solution is found for the boundary-value problem of a semielliptical channel in a ground plane, slotted along the interfocal distance.<>
{"title":"Exact scattering from a slotted semielliptical channel","authors":"P. Uslenghi","doi":"10.1109/APS.1992.221714","DOIUrl":"https://doi.org/10.1109/APS.1992.221714","url":null,"abstract":"The exact eigenfunction solution is obtained for the two-dimensional problem of the scattering of a plane electromagnetic wave by a slotted semielliptical channel in an infinite ground plane. Specifically, the canonical solution is found for the boundary-value problem of a semielliptical channel in a ground plane, slotted along the interfocal distance.<<ETX>>","PeriodicalId":289865,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium 1992 Digest","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115507551","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 authors report on the sequential rotation technique to minimize the severe bandwidth limitations associated with circularly polarized patch antennas. The technique is applicable to all circularly polarized antenna rays. The theory and experimental results are discussed as applied to a patch array. It is confirmed that remarkable antenna bandwidth improvements may be obtained through the use of sequential rotation.<>
{"title":"Bandwidth improvement of circularly polarised arrays using sequential rotation","authors":"K. D. Palmer, J. Cloete, J. V. van Tonder","doi":"10.1109/APS.1992.221983","DOIUrl":"https://doi.org/10.1109/APS.1992.221983","url":null,"abstract":"The authors report on the sequential rotation technique to minimize the severe bandwidth limitations associated with circularly polarized patch antennas. The technique is applicable to all circularly polarized antenna rays. The theory and experimental results are discussed as applied to a patch array. It is confirmed that remarkable antenna bandwidth improvements may be obtained through the use of sequential rotation.<<ETX>>","PeriodicalId":289865,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium 1992 Digest","volume":"145 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115984328","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 problem considered deals with the scattering of a plane wave by an infinitely thin perfectly conducting spherical shell with a circular aperture of arbitrary subtended angle and loaded with a dielectric shell whose permittivity may be different outside the shell from inside. The fields in both regions are expanded in terms of spherical wave functions and the proper boundary conditions are imposed. The modal expansion coefficients are approximated by applying the least square error method to the equations resulting from matching the fields at the aperture. The scattering pattern and radar cross section are presented for a wide range of parameter variations.<>
{"title":"Scattering by a circular aperture in a dielectric-loaded conducting spherical shell","authors":"R. Said, M. Hamid","doi":"10.1109/APS.1992.221736","DOIUrl":"https://doi.org/10.1109/APS.1992.221736","url":null,"abstract":"The problem considered deals with the scattering of a plane wave by an infinitely thin perfectly conducting spherical shell with a circular aperture of arbitrary subtended angle and loaded with a dielectric shell whose permittivity may be different outside the shell from inside. The fields in both regions are expanded in terms of spherical wave functions and the proper boundary conditions are imposed. The modal expansion coefficients are approximated by applying the least square error method to the equations resulting from matching the fields at the aperture. The scattering pattern and radar cross section are presented for a wide range of parameter variations.<<ETX>>","PeriodicalId":289865,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium 1992 Digest","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116547778","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}
Different scenarios of including mutual coupling effects in the analysis of rectangular patch antenna arrays are investigated. A standard method of moments technique is utilized to present three different models of mutual coupling interactions. The corresponding radiation patterns of a 3*3 array are compared with those of neglected mutual coupling. The results illustrate the movement in the radiation patterns as the modeling of the contribution of coupling effects increases from one level to another. It is found that considering only the adjacent patches of the individual elements results in inaccurate radiation pattern predictions.<>
{"title":"Investigation of mutual coupling effects on the radiation pattern of rectangular patch antennas","authors":"M. Gimersky, Jens Bornemann","doi":"10.1109/APS.1992.221554","DOIUrl":"https://doi.org/10.1109/APS.1992.221554","url":null,"abstract":"Different scenarios of including mutual coupling effects in the analysis of rectangular patch antenna arrays are investigated. A standard method of moments technique is utilized to present three different models of mutual coupling interactions. The corresponding radiation patterns of a 3*3 array are compared with those of neglected mutual coupling. The results illustrate the movement in the radiation patterns as the modeling of the contribution of coupling effects increases from one level to another. It is found that considering only the adjacent patches of the individual elements results in inaccurate radiation pattern predictions.<<ETX>>","PeriodicalId":289865,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium 1992 Digest","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122421912","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 authors present several modifications to the conventional aperture coupled microstrip antenna structure that further increase the antenna's bandwidth. The visibility of a stripline feed network is also demonstrated. The modifications are applicable when a microstrip feed network is employed but are especially useful when stripline is used due to the inherently lower feed-line to slot coupling.<>
{"title":"Performance enhancements for aperture coupled microstrip antennas","authors":"R. Hall, J. Sanford","doi":"10.1109/APS.1992.221593","DOIUrl":"https://doi.org/10.1109/APS.1992.221593","url":null,"abstract":"The authors present several modifications to the conventional aperture coupled microstrip antenna structure that further increase the antenna's bandwidth. The visibility of a stripline feed network is also demonstrated. The modifications are applicable when a microstrip feed network is employed but are especially useful when stripline is used due to the inherently lower feed-line to slot coupling.<<ETX>>","PeriodicalId":289865,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium 1992 Digest","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122556527","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}
A hemispherical lens antenna has been developed for the reception of direct to home satellite broadcasts in Europe. The antenna uses a homogeneous lens and flat reflector to give an angle of scan of +or-60 degrees without degradation in performance. Artificial dielectric material consisting of spherical voids in polystyrene is used to realize the necessary lens dielectric constant. Unlike previous implementations of the hemispherical lens approach, the reflector is extended beyond the surface of the lens to maintain the effective aperture area of the antenna with scan angle.<>
{"title":"A hemispherical lens antenna for multi-satellite reception","authors":"D. Harrison, M. Fujimoto, G. Tabor","doi":"10.1109/APS.1992.221751","DOIUrl":"https://doi.org/10.1109/APS.1992.221751","url":null,"abstract":"A hemispherical lens antenna has been developed for the reception of direct to home satellite broadcasts in Europe. The antenna uses a homogeneous lens and flat reflector to give an angle of scan of +or-60 degrees without degradation in performance. Artificial dielectric material consisting of spherical voids in polystyrene is used to realize the necessary lens dielectric constant. Unlike previous implementations of the hemispherical lens approach, the reflector is extended beyond the surface of the lens to maintain the effective aperture area of the antenna with scan angle.<<ETX>>","PeriodicalId":289865,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium 1992 Digest","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122495535","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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