IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229)最新文献
C.T.P. Song, P. Hall, H. Ghafouri-Shiraz, I. Henning
The novel configuration of a shorted fractal Sierpinski gasket antenna is proposed. The new configuration is similar to the inverted L antenna and the shorted loop monopole. Using only half the Sierpinski gasket structure, the symmetrical side is folded over to be parallel to the ground plane. While the 50/spl Omega/ feed remains at the apex, a shorting pin is placed at the far end of the gasket. A planar configuration of this design is also demonstrated.
{"title":"Shorted fractal Sierpinski monopole antenna","authors":"C.T.P. Song, P. Hall, H. Ghafouri-Shiraz, I. Henning","doi":"10.1049/EL:20010709","DOIUrl":"https://doi.org/10.1049/EL:20010709","url":null,"abstract":"The novel configuration of a shorted fractal Sierpinski gasket antenna is proposed. The new configuration is similar to the inverted L antenna and the shorted loop monopole. Using only half the Sierpinski gasket structure, the symmetrical side is folded over to be parallel to the ground plane. While the 50/spl Omega/ feed remains at the apex, a shorting pin is placed at the far end of the gasket. A planar configuration of this design is also demonstrated.","PeriodicalId":159827,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125614954","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}
We present a generalized DClM technique with an improved range of the spatial Green's functions by extracting the poles' contributions and using additional synthetic poles as the quasi-static image for the surface wave poles. The technique also includes an algorithm to extract the poles of the Green's function. The computational requirement of this algorithm was shown to be approximately equal to that of evaluating only one contour integral regardless of the number of poles to be extracted. Hence, this new technique is computationally efficient, robust and the Green's functions derived are also accurate over the entire range of /spl rho/.
{"title":"A robust generalized DCIM technique with pole extraction","authors":"Swee-Ann Teo, M. Leong, S. Chew, B. Ooi","doi":"10.1109/APS.2001.959602","DOIUrl":"https://doi.org/10.1109/APS.2001.959602","url":null,"abstract":"We present a generalized DClM technique with an improved range of the spatial Green's functions by extracting the poles' contributions and using additional synthetic poles as the quasi-static image for the surface wave poles. The technique also includes an algorithm to extract the poles of the Green's function. The computational requirement of this algorithm was shown to be approximately equal to that of evaluating only one contour integral regardless of the number of poles to be extracted. Hence, this new technique is computationally efficient, robust and the Green's functions derived are also accurate over the entire range of /spl rho/.","PeriodicalId":159827,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114986562","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 paper presents an automatic procedure for obtaining the wire-grid model starting from an arbitrary plate model. The procedure results in cells of approximately same size and radial meshing around the wire-to-plate junctions. A number of different models obtained in this manner are then used to determine optimal values of wire radii and spacing. Finally, the accuracy and efficiency of wire-grid modeling is compared with those of plate modeling.
{"title":"Optimal wire-grid modeling based on conversion of solid surface model","authors":"B. Kolundžija, T.S. Miodrag, A. Djordjević","doi":"10.1109/APS.2001.959793","DOIUrl":"https://doi.org/10.1109/APS.2001.959793","url":null,"abstract":"The paper presents an automatic procedure for obtaining the wire-grid model starting from an arbitrary plate model. The procedure results in cells of approximately same size and radial meshing around the wire-to-plate junctions. A number of different models obtained in this manner are then used to determine optimal values of wire radii and spacing. Finally, the accuracy and efficiency of wire-grid modeling is compared with those of plate modeling.","PeriodicalId":159827,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229)","volume":"81 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115225826","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}
Photonic band gap (PBG) materials are periodic structures which exhibit wide band pass and band rejection properties at microwave frequencies. PBG materials are formed by introducing periodic perturbation such as dielectric rods, holes and patterns in waveguides and PCB substrates. As photon propagation is impeded in a photonic crystal by electrons, so the electromagnetic waves in a PBG material are impeded due to the periodic discontinuity, hence making a slow wave structure. This paper reviews the applications of PBG materials in antenna design. Different PBG configurations and their working principles are described. The role of this novel material in enhancing printed antenna performance is highlighted. The applications include image rejection, gain improvement, suppression of surface wave, ripple suppression in radiation patterns and antenna bandwidth.
{"title":"Planar PBG structures and their applications to antennas","authors":"M. N. Mollah, N. Karmakar","doi":"10.1109/APS.2001.959769","DOIUrl":"https://doi.org/10.1109/APS.2001.959769","url":null,"abstract":"Photonic band gap (PBG) materials are periodic structures which exhibit wide band pass and band rejection properties at microwave frequencies. PBG materials are formed by introducing periodic perturbation such as dielectric rods, holes and patterns in waveguides and PCB substrates. As photon propagation is impeded in a photonic crystal by electrons, so the electromagnetic waves in a PBG material are impeded due to the periodic discontinuity, hence making a slow wave structure. This paper reviews the applications of PBG materials in antenna design. Different PBG configurations and their working principles are described. The role of this novel material in enhancing printed antenna performance is highlighted. The applications include image rejection, gain improvement, suppression of surface wave, ripple suppression in radiation patterns and antenna bandwidth.","PeriodicalId":159827,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229)","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115631611","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 Naval Air Warfare Center Aircraft Division (NAWCAD) Patuxent River, MD, is the Navy's principal air platform flight test and evaluation (T&E) activity. NAWCAD is actively engaged in the a Navy's acquisition cycle for all phases of the aircraft system's life cycle, including support of technology demonstration and validation, engineering and manufacturing development (EMD), production and deployment, fleet operations, and fleet in-service engineering. Facilities and capabilities include a principal site for developmental T&E during EMD, as well as range facilities, flight and ground test support, technical and engineering support, and base support for Navy users, other DoD and government agencies, and commercial enterprises.
{"title":"Dynamic in-flight antenna pattern measurement techniques","authors":"R. Hartenstein","doi":"10.1109/APS.2001.959539","DOIUrl":"https://doi.org/10.1109/APS.2001.959539","url":null,"abstract":"The Naval Air Warfare Center Aircraft Division (NAWCAD) Patuxent River, MD, is the Navy's principal air platform flight test and evaluation (T&E) activity. NAWCAD is actively engaged in the a Navy's acquisition cycle for all phases of the aircraft system's life cycle, including support of technology demonstration and validation, engineering and manufacturing development (EMD), production and deployment, fleet operations, and fleet in-service engineering. Facilities and capabilities include a principal site for developmental T&E during EMD, as well as range facilities, flight and ground test support, technical and engineering support, and base support for Navy users, other DoD and government agencies, and commercial enterprises.","PeriodicalId":159827,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229)","volume":"121 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115720634","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}
Dielectric image line (DIL), a rectangular dielectric cylinder on a ground plane, is an open low-loss transmission line for millimeter-wave frequencies. By introducing periodic gratings, linear leaky wave antenna arrays have been made from DIL. A DIL power divider can be constructed by widening the width of its input line and then splitting the dielectric into two output arms. Two planar arrays fed by dielectric image line Y-junctions are described. Planar arrays are used to reduce the radiation patterns' beamwidth in two orthogonal planes. Beam scanning, using an electro-mechanical actuator, is demonstrated for one of the planar antennas.
{"title":"Planar dielectric image line antenna arrays using Y-junctions","authors":"H. Tehrani, Ming-yi Li, K. Chang","doi":"10.1109/APS.2001.960161","DOIUrl":"https://doi.org/10.1109/APS.2001.960161","url":null,"abstract":"Dielectric image line (DIL), a rectangular dielectric cylinder on a ground plane, is an open low-loss transmission line for millimeter-wave frequencies. By introducing periodic gratings, linear leaky wave antenna arrays have been made from DIL. A DIL power divider can be constructed by widening the width of its input line and then splitting the dielectric into two output arms. Two planar arrays fed by dielectric image line Y-junctions are described. Planar arrays are used to reduce the radiation patterns' beamwidth in two orthogonal planes. Beam scanning, using an electro-mechanical actuator, is demonstrated for one of the planar antennas.","PeriodicalId":159827,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116925575","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}
This paper derives simple CAD formulas of three common types of MIC lines: microstrip, CPW (coplanar waveguides) without and with a backing conducting plane. It shows that both the analysis and design formula pair can be derived from the same novel technique of synthetic asymptote. Unlike other curve fitted formulas, the synthetic asymptote formulas are simple, provide good physical insight and only one arbitrary constant. The paper also shows that a combination of the two formula pairs, of a CPW (without conductor backing) and a microstrip line, actually form the formula pair of a CPW with conductor backing. The average errors are less than 2%.
{"title":"CAD formulas and their inverses for microstrip, CPW and conductor-backed CPW, by successive synthetic asymptotes","authors":"W. Tang, Y. Chow","doi":"10.1109/APS.2001.960117","DOIUrl":"https://doi.org/10.1109/APS.2001.960117","url":null,"abstract":"This paper derives simple CAD formulas of three common types of MIC lines: microstrip, CPW (coplanar waveguides) without and with a backing conducting plane. It shows that both the analysis and design formula pair can be derived from the same novel technique of synthetic asymptote. Unlike other curve fitted formulas, the synthetic asymptote formulas are simple, provide good physical insight and only one arbitrary constant. The paper also shows that a combination of the two formula pairs, of a CPW (without conductor backing) and a microstrip line, actually form the formula pair of a CPW with conductor backing. The average errors are less than 2%.","PeriodicalId":159827,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229)","volume":"339 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121121751","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}
This paper presents the results from an extensive numerical simulation of the effect of the mobile telephone inside the human brain The aim of this paper is to build a simulation model of real mobile telephone and combine it with the simulation model of the human brain. The combined method of moments (MoM) and generalized multipole technique (GMT) is used to determine and study the electromagnetic field (EF) and the absorbed power (AP) induced inside various models of biological body or human brain. The computed results with this combination technique demonstrate the accuracy of each implementation. The computed (EF) has a special or important meaning for the distributed (EF) induced inside the human brain. For the particular geometry simulated. the presence of the head model is taken with different views.
{"title":"Biological effect of mobile telephone inside the human brain","authors":"A. Hassanin","doi":"10.1109/APS.2001.959628","DOIUrl":"https://doi.org/10.1109/APS.2001.959628","url":null,"abstract":"This paper presents the results from an extensive numerical simulation of the effect of the mobile telephone inside the human brain The aim of this paper is to build a simulation model of real mobile telephone and combine it with the simulation model of the human brain. The combined method of moments (MoM) and generalized multipole technique (GMT) is used to determine and study the electromagnetic field (EF) and the absorbed power (AP) induced inside various models of biological body or human brain. The computed results with this combination technique demonstrate the accuracy of each implementation. The computed (EF) has a special or important meaning for the distributed (EF) induced inside the human brain. For the particular geometry simulated. the presence of the head model is taken with different views.","PeriodicalId":159827,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229)","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127117607","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}
We have made a thorough examination of the existing theory of receiving antennas, particularly its equivalent circuit and we have formulated a new theory. The formulation is based on the classical theory of scattering, and by revising the well-known circuit relations for coupled antennas formulated by P.S. Carter (see Proc. IRE, vol.20, p.1004-41, 1932). The new theory enables us to revise not only the equivalent circuit but many related parameters, such as the impedance matching factor, the polarization matching factor, the receiving cross-section, and the generalized Friis's transmission formula.
{"title":"A new theory of receiving antennas","authors":"C. Tai","doi":"10.1109/APS.2001.959663","DOIUrl":"https://doi.org/10.1109/APS.2001.959663","url":null,"abstract":"We have made a thorough examination of the existing theory of receiving antennas, particularly its equivalent circuit and we have formulated a new theory. The formulation is based on the classical theory of scattering, and by revising the well-known circuit relations for coupled antennas formulated by P.S. Carter (see Proc. IRE, vol.20, p.1004-41, 1932). The new theory enables us to revise not only the equivalent circuit but many related parameters, such as the impedance matching factor, the polarization matching factor, the receiving cross-section, and the generalized Friis's transmission formula.","PeriodicalId":159827,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127258824","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}
This paper presents a refinement to the hierarchical multilayer fast multipole method (HMFMM) we developed previously (see Pan, Y.C. and Chew, W.C., Microwave Opt. Tech. Lett., vol.27, p.13-17, 2000). In HMFMM, the image outgoing-to-local multipole translator is calculated using the image theory, which requires knowledge of the location and strength of all the images. Such an approach is difficult to apply to media where three or more layers are present. We have developed a generalized approach that resolves this difficultly.
{"title":"A generalized method for the computation of the outgoing-to-local multipole translators","authors":"Y.C. Pan, W. Chew","doi":"10.1109/APS.2001.959845","DOIUrl":"https://doi.org/10.1109/APS.2001.959845","url":null,"abstract":"This paper presents a refinement to the hierarchical multilayer fast multipole method (HMFMM) we developed previously (see Pan, Y.C. and Chew, W.C., Microwave Opt. Tech. Lett., vol.27, p.13-17, 2000). In HMFMM, the image outgoing-to-local multipole translator is calculated using the image theory, which requires knowledge of the location and strength of all the images. Such an approach is difficult to apply to media where three or more layers are present. We have developed a generalized approach that resolves this difficultly.","PeriodicalId":159827,"journal":{"name":"IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229)","volume":"869 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2001-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124796233","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}
IEEE Antennas and Propagation Society International Symposium. 2001 Digest. Held in conjunction with: USNC/URSI National Radio Science Meeting (Cat. No.01CH37229)
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