Summary form only given. Within the limits of the quasi-TEM (transverse electromagnetic) approximation, the validity of a simple dispersive model for the electrical analysis of interconnections with perforated reference planes was examined. The advantage of this model is that simple 2-D transmission-line parameter extraction programs are mainly utilized and, combined with an appropriate electromagnetic analysis of the periodic interconnect geometry, lead to a computationally efficient prediction of the transmission line characteristics of the interconnections. The proposed model was extended to the electrical characterization of coupled interconnects, as well as interconnects located on either side of a perforated plane. Comparisons with experimental results and results obtained using rigorous full-wave techniques were used to demonstrate the validity of the proposed model.<>
{"title":"Electromagnetic characterization of high-speed VLSI interconnects with perforated reference planes","authors":"A. Cangellaris","doi":"10.1109/APS.1992.221658","DOIUrl":"https://doi.org/10.1109/APS.1992.221658","url":null,"abstract":"Summary form only given. Within the limits of the quasi-TEM (transverse electromagnetic) approximation, the validity of a simple dispersive model for the electrical analysis of interconnections with perforated reference planes was examined. The advantage of this model is that simple 2-D transmission-line parameter extraction programs are mainly utilized and, combined with an appropriate electromagnetic analysis of the periodic interconnect geometry, lead to a computationally efficient prediction of the transmission line characteristics of the interconnections. The proposed model was extended to the electrical characterization of coupled interconnects, as well as interconnects located on either side of a perforated plane. Comparisons with experimental results and results obtained using rigorous full-wave techniques were used to demonstrate the validity of the proposed model.<<ETX>>","PeriodicalId":289865,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium 1992 Digest","volume":"21 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":"132167535","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 author considers the impact of hybrid-mode surface wave excitation on the input impedance of a loop antenna which is positioned in a double-layer air-dielectric medium. The results presented verify that, under certain geometries, the HE/sub 11/ surface wave mode will strongly influence the input impedance of the antenna.<>
{"title":"On the input impedance of loop antennas in cylindrically stratified media","authors":"W. Rawle","doi":"10.1109/APS.1992.221804","DOIUrl":"https://doi.org/10.1109/APS.1992.221804","url":null,"abstract":"The author considers the impact of hybrid-mode surface wave excitation on the input impedance of a loop antenna which is positioned in a double-layer air-dielectric medium. The results presented verify that, under certain geometries, the HE/sub 11/ surface wave mode will strongly influence the input impedance of the antenna.<<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":"132272978","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. R.S. Elliott's contributions to the study of electromagnetics are discussed, with particular attention given to his book Electromagnetics (1960) and his paper, 'Electromagnetic Theory as Hertz Would Have Known It'. The detailed historical presentation in Elliott's book is noted.<>
{"title":"Historical perspectives-Robert S. Elliott's contributions","authors":"E. S. Gillespie","doi":"10.1109/APS.1992.221682","DOIUrl":"https://doi.org/10.1109/APS.1992.221682","url":null,"abstract":"Summary form only given. R.S. Elliott's contributions to the study of electromagnetics are discussed, with particular attention given to his book Electromagnetics (1960) and his paper, 'Electromagnetic Theory as Hertz Would Have Known It'. The detailed historical presentation in Elliott's book is noted.<<ETX>>","PeriodicalId":289865,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium 1992 Digest","volume":"9 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":"134618849","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 loading technique that combines both resistive and inductive tapered loadings to improve the efficiency of the monopole and yet maintain uniform nonresonant impedance characteristics which makes a good impedance match possible, is introduced. In order to increase the radiating power and thus the efficiency of the resistively tapered monopole, tapered inductive loading is employed primarily to counteract the high capacitive reactance at the lower end of the frequency band and thus increase the radiating power of the antenna. Several profiles for the inductive loading were tested and were found to give, depending on the load, an improvement in the radiation power of the antenna. However, only one among the different loading profiles used was able to increase the efficiency and yet maintain very favorable broadband matching characteristics.<>
{"title":"Combined tapered resistive and inductive loading to increase the bandwidth of small antennas","authors":"L. Little, O. Ramahi, R. Mittra","doi":"10.1109/APS.1992.221455","DOIUrl":"https://doi.org/10.1109/APS.1992.221455","url":null,"abstract":"A loading technique that combines both resistive and inductive tapered loadings to improve the efficiency of the monopole and yet maintain uniform nonresonant impedance characteristics which makes a good impedance match possible, is introduced. In order to increase the radiating power and thus the efficiency of the resistively tapered monopole, tapered inductive loading is employed primarily to counteract the high capacitive reactance at the lower end of the frequency band and thus increase the radiating power of the antenna. Several profiles for the inductive loading were tested and were found to give, depending on the load, an improvement in the radiation power of the antenna. However, only one among the different loading profiles used was able to increase the efficiency and yet maintain very favorable broadband matching characteristics.<<ETX>>","PeriodicalId":289865,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium 1992 Digest","volume":"95 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":"134624770","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 dual-shaped dual-reflector synthesis technique is applied to the design of a reflector antenna system for transforming the output of a whispering-gallery-mode gyrotron to a focused Gaussian free-space beam. Numerical and measured results of the synthesis are presented. The synthesis routine developed yields excellent results when analyzed using ray tracing. Diffraction calculations indicate that undesired output field structure can be nearly eliminated by modifying the radiation pattern of the primary radiator.<>
{"title":"Theory and measurement for a dual-shaped reflector antenna for a whispering-gallery-mode gyrotron","authors":"J. Lorbeck, R. Vernon","doi":"10.1109/APS.1992.221922","DOIUrl":"https://doi.org/10.1109/APS.1992.221922","url":null,"abstract":"A dual-shaped dual-reflector synthesis technique is applied to the design of a reflector antenna system for transforming the output of a whispering-gallery-mode gyrotron to a focused Gaussian free-space beam. Numerical and measured results of the synthesis are presented. The synthesis routine developed yields excellent results when analyzed using ray tracing. Diffraction calculations indicate that undesired output field structure can be nearly eliminated by modifying the radiation pattern of the primary radiator.<<ETX>>","PeriodicalId":289865,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium 1992 Digest","volume":"1 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":"131280572","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 admittance matrix of a reentrant folded dipole is derived, its equivalent circuit is evaluated, and a mathematical model is presented. These results, when combined with mutual coupling theory and an iterative network computation can lead to the evaluation of all element excitation coefficients. This, then, allows far-field radiation pattern predictions of a log-periodic folded dipole backfire array and permits tolerance analysis and optimization of antenna dimensions for best gain and sidelobes.<>
{"title":"Analysis of log-periodic folded dipole array","authors":"H. Shnitkin","doi":"10.1109/APS.1992.221451","DOIUrl":"https://doi.org/10.1109/APS.1992.221451","url":null,"abstract":"The admittance matrix of a reentrant folded dipole is derived, its equivalent circuit is evaluated, and a mathematical model is presented. These results, when combined with mutual coupling theory and an iterative network computation can lead to the evaluation of all element excitation coefficients. This, then, allows far-field radiation pattern predictions of a log-periodic folded dipole backfire array and permits tolerance analysis and optimization of antenna dimensions for best gain and sidelobes.<<ETX>>","PeriodicalId":289865,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium 1992 Digest","volume":"38 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133753672","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}
In an effort to develop an antenna-mixer array based on the existing technology, various antenna probes inside pyramidal horns have been examined on scaled model-horns at microwave frequencies. Modeling results and design principles of these antenna probes are presented, which include the resonant impedance, the operating frequency, and the bandwidth of the horn antennas. These measurement results provide a guideline for designing probes for millimeter/submillimeter-wave integrated-circuit horn-antenna-mixer arrays. All the impedance measurements indicate that the presence of the horn increases the effective length of the probe element. They also indicate that the resonant frequencies can be controlled by changing the length of the probes or loading the probes, and that resonant resistances can be increased to a reasonable matching range by folding the probes. The fan-probe design indicates that the bandwidth can be increased by changing the probe width.<>
{"title":"Probe modeling for millimeter-wave integrated-circuit horn antennas","authors":"Yong Guo, J. Chiao, K. Potter, D. Rutledge","doi":"10.1109/APS.1992.221438","DOIUrl":"https://doi.org/10.1109/APS.1992.221438","url":null,"abstract":"In an effort to develop an antenna-mixer array based on the existing technology, various antenna probes inside pyramidal horns have been examined on scaled model-horns at microwave frequencies. Modeling results and design principles of these antenna probes are presented, which include the resonant impedance, the operating frequency, and the bandwidth of the horn antennas. These measurement results provide a guideline for designing probes for millimeter/submillimeter-wave integrated-circuit horn-antenna-mixer arrays. All the impedance measurements indicate that the presence of the horn increases the effective length of the probe element. They also indicate that the resonant frequencies can be controlled by changing the length of the probes or loading the probes, and that resonant resistances can be increased to a reasonable matching range by folding the probes. The fan-probe design indicates that the bandwidth can be increased by changing the probe width.<<ETX>>","PeriodicalId":289865,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium 1992 Digest","volume":"71 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":"133756161","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 novel ABC has been proposed, based on anechoic chamber absorber foam geometry, with specified complex permittivity and permeability. The advantage of this absorbing boundary, based on carbon-loaded anechoic chamber absorber foam pyramids, is that it prevents reflections from much wider incident angles than currently used techniques. Preliminary FDTD (finite-difference time-domain) results on this ABC are presented. A two-dimensional FDTD simulation of an equilateral triangle saw-tooth absorbing layer, with a modulated Gaussian pulse plane wave, is shown.<>
{"title":"Preliminary FDTD results from the anechoic absorber absorbing boundary condition","authors":"C. Rappaport","doi":"10.1109/APS.1992.221880","DOIUrl":"https://doi.org/10.1109/APS.1992.221880","url":null,"abstract":"A novel ABC has been proposed, based on anechoic chamber absorber foam geometry, with specified complex permittivity and permeability. The advantage of this absorbing boundary, based on carbon-loaded anechoic chamber absorber foam pyramids, is that it prevents reflections from much wider incident angles than currently used techniques. Preliminary FDTD (finite-difference time-domain) results on this ABC are presented. A two-dimensional FDTD simulation of an equilateral triangle saw-tooth absorbing layer, with a modulated Gaussian pulse plane wave, is shown.<<ETX>>","PeriodicalId":289865,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium 1992 Digest","volume":"113 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":"115378624","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 rigorous formulation is carried out for a superconducting microstrip line with an arbitrary strip thickness. The superconducting strip is modeled by an equivalent impedance sheet in the formulation. The surface impedance of the sheet is obtained in a general closed form which is a function of the strip parameters. The transmission characteristics of superconducting microstrip lines are calculated using the derived formula and presented for comparison. Numerical results for the phase and attenuation constants of microstrip lines are computed using the two-fluid model for the sake of comparison with other methods. It is concluded that the approach presented here can accurately predict the characteristics of normal conducting and superconducting microstrip lines as well as other planar transmission lines with finite strip thickness.<>
{"title":"Spectral domain formulation for superconducting microstrip lines with arbitrary strip thickness","authors":"A. Shalaby","doi":"10.1109/APS.1992.221781","DOIUrl":"https://doi.org/10.1109/APS.1992.221781","url":null,"abstract":"A rigorous formulation is carried out for a superconducting microstrip line with an arbitrary strip thickness. The superconducting strip is modeled by an equivalent impedance sheet in the formulation. The surface impedance of the sheet is obtained in a general closed form which is a function of the strip parameters. The transmission characteristics of superconducting microstrip lines are calculated using the derived formula and presented for comparison. Numerical results for the phase and attenuation constants of microstrip lines are computed using the two-fluid model for the sake of comparison with other methods. It is concluded that the approach presented here can accurately predict the characteristics of normal conducting and superconducting microstrip lines as well as other planar transmission lines with finite strip thickness.<<ETX>>","PeriodicalId":289865,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium 1992 Digest","volume":"1 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":"115795943","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 method is presented for computing far-field antenna patterns from near-field measurements. The method utilizes near-field data to determine equivalent magnetic current sources over a fictitious planar surface which encompasses the antenna, and these currents are used to ascertain the farfields. An electric field integral equation is developed to relate the near fields to the equivalent magnetic currents. A method of moments procedure is used to transform the integral equation into a matrix one. The matrix equation is solved with the conjugate gradient method (CGM), and, in the case of a rectangular matrix, a least-squares solution for the currents is found without explicitly computing the normal form of the equation. Near-field to far-field transformation for planar scanning may be efficiently performed under certain conditions by exploiting the block Toeplitz structure of the matrix and using CGM and the fast Fourier-transform (CGFFT), thereby drastically reducing computation and storage requirements. Numerical results are presented by extrapolating the far fields using experimental near-field data.<>
{"title":"A planar near-field to far-field transformation using an equivalent magnetic current approach","authors":"P. Petre, T. Sarkar","doi":"10.1109/APS.1992.221746","DOIUrl":"https://doi.org/10.1109/APS.1992.221746","url":null,"abstract":"A method is presented for computing far-field antenna patterns from near-field measurements. The method utilizes near-field data to determine equivalent magnetic current sources over a fictitious planar surface which encompasses the antenna, and these currents are used to ascertain the farfields. An electric field integral equation is developed to relate the near fields to the equivalent magnetic currents. A method of moments procedure is used to transform the integral equation into a matrix one. The matrix equation is solved with the conjugate gradient method (CGM), and, in the case of a rectangular matrix, a least-squares solution for the currents is found without explicitly computing the normal form of the equation. Near-field to far-field transformation for planar scanning may be efficiently performed under certain conditions by exploiting the block Toeplitz structure of the matrix and using CGM and the fast Fourier-transform (CGFFT), thereby drastically reducing computation and storage requirements. Numerical results are presented by extrapolating the far fields using experimental near-field data.<<ETX>>","PeriodicalId":289865,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium 1992 Digest","volume":"387 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":"115912774","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：