A novel classification method is proposed for radar targets, in which Gershgorin disks are utilized. It can be seen that the new method will be better than the eigenvalue method for the classification of radar targets. Three examples are considered: a spherical target, a horizontal trough, and a symmetric target.<>
{"title":"A new classification method of the radar targets by using the Gershgorin disks of the Mueller matrices","authors":"S.-M. Lin","doi":"10.1109/APS.1992.221675","DOIUrl":"https://doi.org/10.1109/APS.1992.221675","url":null,"abstract":"A novel classification method is proposed for radar targets, in which Gershgorin disks are utilized. It can be seen that the new method will be better than the eigenvalue method for the classification of radar targets. Three examples are considered: a spherical target, a horizontal trough, and a symmetric target.<<ETX>>","PeriodicalId":289865,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium 1992 Digest","volume":"8 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":"121145975","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}
Summary form only given. The Antenna Laboratory (now the ElectroScience Laboratory) was created during World War II. With the advent of the launching of Sputnik and the Korean War, the Antenna Laboratory experienced a period of unprecedented growth. With the exception of a static period in the early 1970s the Antenna Laboratory, by now the ElectroScience Laboratory, continued to grow and its technical breadth had increased substantially.<>
{"title":"Historical review of ElectroScience Laboratory with an emphasis on contributions of R.G. Kouyoumjian","authors":"L. Peters","doi":"10.1109/APS.1992.221620","DOIUrl":"https://doi.org/10.1109/APS.1992.221620","url":null,"abstract":"Summary form only given. The Antenna Laboratory (now the ElectroScience Laboratory) was created during World War II. With the advent of the launching of Sputnik and the Korean War, the Antenna Laboratory experienced a period of unprecedented growth. With the exception of a static period in the early 1970s the Antenna Laboratory, by now the ElectroScience Laboratory, continued to grow and its technical breadth had increased substantially.<<ETX>>","PeriodicalId":289865,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium 1992 Digest","volume":"40 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":"121589657","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}
It was demonstrated that with a proper choice of excitation coefficients it is possible to realize shaped beam patterns with the use of resonant compound coupling slots. The design of a breadboard antenna employing such coupling elements is described. An antenna consisting of eight end-fed resonant radiating waveguides with 14 longitudinal broadwall slots each was designed at 5300 MHz. Antenna patterns were recorded at a farfield test range. The elevation and azimuth patterns obtained from the measurements are found to be in very good agreement with the corresponding theoretical results. The copolarized and cross-polarized measured elevation patterns at 5300 MHz are shown. The cross-polarized signal level is more than 40 dB below the beam peak.<>
{"title":"A slotted waveguide antenna employing resonant compound coupling slots for beam shaping","authors":"A. Derneryd, S. Rengarajan, S.-O. Brattstrom","doi":"10.1109/APS.1992.222007","DOIUrl":"https://doi.org/10.1109/APS.1992.222007","url":null,"abstract":"It was demonstrated that with a proper choice of excitation coefficients it is possible to realize shaped beam patterns with the use of resonant compound coupling slots. The design of a breadboard antenna employing such coupling elements is described. An antenna consisting of eight end-fed resonant radiating waveguides with 14 longitudinal broadwall slots each was designed at 5300 MHz. Antenna patterns were recorded at a farfield test range. The elevation and azimuth patterns obtained from the measurements are found to be in very good agreement with the corresponding theoretical results. The copolarized and cross-polarized measured elevation patterns at 5300 MHz are shown. The cross-polarized signal level is more than 40 dB below the beam peak.<<ETX>>","PeriodicalId":289865,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium 1992 Digest","volume":"188 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113998557","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 hybrid finite-element formulation has been proposed for characterization of the scattering and radiation properties of microstrip patch antennas and arrays residing in a cavity (Jin and Volakis, 1991). The technique combines the finite-element (FE) and boundary integral (BI) methods to formulate a system for the solution of the fields at the aperture and those within the substrate. In the previous implementation, rectangular bricks/patches were used for a discretization of the cavity volume/superstrate. These elements inherently limit the applicability of the method to rectangular shape patches and cavities, and to specific feed structures. To avoid such restrictions on the geometrical adaptability of the FE-BI method, the authors consider its implementation using tetrahedral/triangular elements for discretizing the cavity volume/aperture. The tetrahedral elements permit excellent geometrical adaptability. The characterization (scattering/radiation) of nonrectangular patches and broadband radiators is considered. The method's ability to model practical shape and corporate feeds is demonstrated and results are presented for the antenna/array radar cross section in and out of the operating band.<>
{"title":"Characterization of cavity-backed conformal antennas and arrays using a hybrid finite element method with tetrahedral elements","authors":"J. Gong, J. Volakis, A. Chatterjee, Jianming Jin","doi":"10.1109/APS.1992.221723","DOIUrl":"https://doi.org/10.1109/APS.1992.221723","url":null,"abstract":"A hybrid finite-element formulation has been proposed for characterization of the scattering and radiation properties of microstrip patch antennas and arrays residing in a cavity (Jin and Volakis, 1991). The technique combines the finite-element (FE) and boundary integral (BI) methods to formulate a system for the solution of the fields at the aperture and those within the substrate. In the previous implementation, rectangular bricks/patches were used for a discretization of the cavity volume/superstrate. These elements inherently limit the applicability of the method to rectangular shape patches and cavities, and to specific feed structures. To avoid such restrictions on the geometrical adaptability of the FE-BI method, the authors consider its implementation using tetrahedral/triangular elements for discretizing the cavity volume/aperture. The tetrahedral elements permit excellent geometrical adaptability. The characterization (scattering/radiation) of nonrectangular patches and broadband radiators is considered. The method's ability to model practical shape and corporate feeds is demonstrated and results are presented for the antenna/array radar cross section in and out of the operating band.<<ETX>>","PeriodicalId":289865,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium 1992 Digest","volume":"64 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":"114799479","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 encapsulated dipole array has been developed for use as an aircraft beacon interrogator antenna, the high gain open planar array. The interrogator antenna provides a highly shaped beam which provides elevation coverage to greater than 50 degrees elevation over the frequency range of 1026.5 to 1095 MHz. In addition, three channels of performance are provided (sum, difference and sidelobe suppression). The design procedure and resulting performance are presented.<>
{"title":"An encapsulated dipole shaped beam array for air traffic control","authors":"C.G. Pewsey, W.N. Klimczak, R.G. Farzin","doi":"10.1109/APS.1992.221627","DOIUrl":"https://doi.org/10.1109/APS.1992.221627","url":null,"abstract":"An encapsulated dipole array has been developed for use as an aircraft beacon interrogator antenna, the high gain open planar array. The interrogator antenna provides a highly shaped beam which provides elevation coverage to greater than 50 degrees elevation over the frequency range of 1026.5 to 1095 MHz. In addition, three channels of performance are provided (sum, difference and sidelobe suppression). The design procedure and resulting performance are presented.<<ETX>>","PeriodicalId":289865,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium 1992 Digest","volume":"4 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":"126524690","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 full-wave analysis using the Wiener-Hopf procedure and the generalized scattering matrix technique, referred to as WH/GSMT, is presented. A canonical problem where the scattering of an obliquely incident plane wave by a perfect electric conducting half plane embedded in multilayer dielectric slabs is solved by way of the Wiener-Hopf formulation. The GSMT is used to build the transverse resonance relation in a self-consistent manner. Since all the scattering matrix elements are written in closed form, the method presented is very efficient in terms of both CPU time and storage space. Also, since no basis functions have to be assumed prior to the analysis, the results are quite reliable. Another important feature of this method is that it can provide good physical insight into the problems being considered because the result gives the complex amplitudes of individual parallel plate waveguide modes in each region. This method is especially suitable for transmission lines of intermediate width, with finite lateral ground planes or coupled strip line and slotline.<>
{"title":"A WH/GSMT based full-wave analysis of multilayered printed transmission lines","authors":"Chou Ling-Miao, R. Rojas, P. Pathak","doi":"10.1109/APS.1992.221395","DOIUrl":"https://doi.org/10.1109/APS.1992.221395","url":null,"abstract":"A full-wave analysis using the Wiener-Hopf procedure and the generalized scattering matrix technique, referred to as WH/GSMT, is presented. A canonical problem where the scattering of an obliquely incident plane wave by a perfect electric conducting half plane embedded in multilayer dielectric slabs is solved by way of the Wiener-Hopf formulation. The GSMT is used to build the transverse resonance relation in a self-consistent manner. Since all the scattering matrix elements are written in closed form, the method presented is very efficient in terms of both CPU time and storage space. Also, since no basis functions have to be assumed prior to the analysis, the results are quite reliable. Another important feature of this method is that it can provide good physical insight into the problems being considered because the result gives the complex amplitudes of individual parallel plate waveguide modes in each region. This method is especially suitable for transmission lines of intermediate width, with finite lateral ground planes or coupled strip line and slotline.<<ETX>>","PeriodicalId":289865,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium 1992 Digest","volume":"8 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":"125600499","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 sparse approximate inverse to the impedance matrix localization (IML) method is described which allows solution in five iterations. Numerical results show how well the method discussed works.<>
{"title":"A sparse approximate inverse to the IML matrices allows solution in 5 iterations","authors":"F. Canning","doi":"10.1109/APS.1992.221973","DOIUrl":"https://doi.org/10.1109/APS.1992.221973","url":null,"abstract":"A sparse approximate inverse to the impedance matrix localization (IML) method is described which allows solution in five iterations. Numerical results show how well the method discussed works.<<ETX>>","PeriodicalId":289865,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium 1992 Digest","volume":"22 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":"125735951","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 design analysis and fabrication technique of an omnidirectional microstrip slot antenna for mobile communications are discussed. The antenna was designed at a 2-GHz center frequency, a VSWR (voltage standing wave ratio) of 1.5:1, and a 0.87% bandwidth, and on FR-4 glass epoxy substrate with in /sub r/=4.85, h=0.159 cm. The experimental results are compared with the required design values and the reasons for discrepancy are investigated.<>
讨论了移动通信用全向微带槽天线的设计分析和制作技术。天线的中心频率为2ghz，电压驻波比为1.5:1，带宽为0.87%，天线安装在FR-4玻璃环氧基板上，in /sub / r =4.85, h=0.159 cm。将实验结果与设计要求值进行了比较，并分析了产生差异的原因。
{"title":"Design of a microstrip annular slot antenna for mobile communications","authors":"P. Mastin, B. Rawat, M. Williamson","doi":"10.1109/APS.1992.221889","DOIUrl":"https://doi.org/10.1109/APS.1992.221889","url":null,"abstract":"The design analysis and fabrication technique of an omnidirectional microstrip slot antenna for mobile communications are discussed. The antenna was designed at a 2-GHz center frequency, a VSWR (voltage standing wave ratio) of 1.5:1, and a 0.87% bandwidth, and on FR-4 glass epoxy substrate with in /sub r/=4.85, h=0.159 cm. The experimental results are compared with the required design values and the reasons for discrepancy are investigated.<<ETX>>","PeriodicalId":289865,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium 1992 Digest","volume":"24 5 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":"126002552","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 cross-correlation coefficient for two closely spaced, terminated, monopole antennas is calculated using an existing general theoretical approach. The effect of the antenna terminations, as compared to open-circuit conditions, is to allow mutual coupling. The principal effects of including the mutual coupling are closer antenna spacings for a given cross-correlation coefficient, and a related difference between the physical antenna separation and the electrical antenna separation.<>
{"title":"Closely spaced terminated monopoles for vehicular diversity antennas","authors":"R. Vaughan, N. Scott","doi":"10.1109/APS.1992.221580","DOIUrl":"https://doi.org/10.1109/APS.1992.221580","url":null,"abstract":"The cross-correlation coefficient for two closely spaced, terminated, monopole antennas is calculated using an existing general theoretical approach. The effect of the antenna terminations, as compared to open-circuit conditions, is to allow mutual coupling. The principal effects of including the mutual coupling are closer antenna spacings for a given cross-correlation coefficient, and a related difference between the physical antenna separation and the electrical antenna separation.<<ETX>>","PeriodicalId":289865,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium 1992 Digest","volume":"14 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":"121777164","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}
M. Inoue, M. Tajima, T. Suzuki, K. Hariu, T. Katagi
A method of measuring a two-dimensional radiation pattern utilizing the rotating element field vector method and an error correction technique is developed. This method provides precise measuring capability without moving an antenna under test and a transmitting antenna. It was found that this method is useful for precise measurement in a limited angle, such as null direction measurement of a difference pattern of a monopulse antenna.<>
{"title":"A precise null direction measurement method for a monopulse antenna","authors":"M. Inoue, M. Tajima, T. Suzuki, K. Hariu, T. Katagi","doi":"10.1109/APS.1992.221460","DOIUrl":"https://doi.org/10.1109/APS.1992.221460","url":null,"abstract":"A method of measuring a two-dimensional radiation pattern utilizing the rotating element field vector method and an error correction technique is developed. This method provides precise measuring capability without moving an antenna under test and a transmitting antenna. It was found that this method is useful for precise measurement in a limited angle, such as null direction measurement of a difference pattern of a monopulse antenna.<<ETX>>","PeriodicalId":289865,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium 1992 Digest","volume":"37 8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113940857","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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