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Cavity resonators 空腔谐振器
2006 12th International Symposium on Antenna Technology and Applied Electromagnetics and Canadian Radio Sciences Conference Pub Date : 2006-07-01 DOI: 10.1109/9780470544631.ch9
M. Fallah-Rad, L. Shafai, D. Thomson
{"title":"Cavity resonators","authors":"M. Fallah-Rad, L. Shafai, D. Thomson","doi":"10.1109/9780470544631.ch9","DOIUrl":"https://doi.org/10.1109/9780470544631.ch9","url":null,"abstract":"In this paper, properties of few different types of cavity resonators are investigated using commercial full wave softwares. The simulations are performed using Ansoft HFSS (FEM) and Microstripes (TLM). A new tunable coaxial cavity with dual resonators is designed and fabricated. A parametric study of helical resonators is presented along with resonant properties.","PeriodicalId":397063,"journal":{"name":"2006 12th International Symposium on Antenna Technology and Applied Electromagnetics and Canadian Radio Sciences Conference","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132174819","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}
引用次数: 5
Maxwell's legacy 麦克斯韦的遗产
2006 12th International Symposium on Antenna Technology and Applied Electromagnetics and Canadian Radio Sciences Conference Pub Date : 2005-08-08 DOI: 10.1109/MMW.2005.1491266
J. Rautio
{"title":"Maxwell's legacy","authors":"J. Rautio","doi":"10.1109/MMW.2005.1491266","DOIUrl":"https://doi.org/10.1109/MMW.2005.1491266","url":null,"abstract":"Working with RF has been a passion of mine ever since I learned how to grab a soldering iron by the right (EM) has held my attention for the last two decades. Gradually, as I started playing with Maxwell's equations back in the “good old days,” I began wondering about this Maxwell fellow (Figure 1). Historians acknowledge him to be the most important physicist of the 19th century, the equal of Einstein and Newton. Any bookstore or library has biographies of both Newton and Einstein … so where are the Maxwell biographies?","PeriodicalId":397063,"journal":{"name":"2006 12th International Symposium on Antenna Technology and Applied Electromagnetics and Canadian Radio Sciences Conference","volume":"426 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131719402","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}
引用次数: 7
UTD asymptotic code used for antenna implementation on electrically large structures 用于在电大结构上实现天线的UTD渐近代码
2006 12th International Symposium on Antenna Technology and Applied Electromagnetics and Canadian Radio Sciences Conference Pub Date : 2005-06-01 DOI: 10.1109/ANTEM.2005.7852013
J. Adam, Y. Béniguel
{"title":"UTD asymptotic code used for antenna implementation on electrically large structures","authors":"J. Adam, Y. Béniguel","doi":"10.1109/ANTEM.2005.7852013","DOIUrl":"https://doi.org/10.1109/ANTEM.2005.7852013","url":null,"abstract":"The implementation of antennas in a complex environment still remains a problem when high frequencies are considered [3]. The Uniform geometrical Theory of Diffraction (UTD) is one of the most convenient techniques to solve this problem [1,2]. This method is applied in the software IDRA developed at IEEA.","PeriodicalId":397063,"journal":{"name":"2006 12th International Symposium on Antenna Technology and Applied Electromagnetics and Canadian Radio Sciences Conference","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126671339","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}
引用次数: 2
Extraction of generalized scattering matrix coefficients of waveguide discontinuities using the TLM method 用TLM方法提取波导不连续点的广义散射矩阵系数
2006 12th International Symposium on Antenna Technology and Applied Electromagnetics and Canadian Radio Sciences Conference Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861706
B. Ghosh, N. Simons, L. Shafai, A. Ittipiboon, A. Petosa, M. Cuhaci
{"title":"Extraction of generalized scattering matrix coefficients of waveguide discontinuities using the TLM method","authors":"B. Ghosh, N. Simons, L. Shafai, A. Ittipiboon, A. Petosa, M. Cuhaci","doi":"10.1109/ANTEM.1998.7861706","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861706","url":null,"abstract":"In this paper, a method for obtaining the generalized scattering matrix coefficients of both the propagating and evanescent modes of waveguide discontinuities is presented. The method is based on the modal expansion of field distributions obtained from Transmission Line Matrix (TLM) simulations and use of the orthogonality principle to quantify the presence of specific modes. Using this approach, the coefficients have been evaluated close to discontinuities in the presence of higher order propagating as well as evanescent modes. This simple and rigorous approach enables us to characterize a discontinuity with reduced computational effort.","PeriodicalId":397063,"journal":{"name":"2006 12th International Symposium on Antenna Technology and Applied Electromagnetics and Canadian Radio Sciences Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128455547","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}
引用次数: 0
Wideband properties of two mutually coupled printed dipole elements 两个相互耦合的印刷偶极子元件的宽带特性
2006 12th International Symposium on Antenna Technology and Applied Electromagnetics and Canadian Radio Sciences Conference Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861740
M. Mikavica, B. Kolundžija, A. Nesic, M. Marjanović
{"title":"Wideband properties of two mutually coupled printed dipole elements","authors":"M. Mikavica, B. Kolundžija, A. Nesic, M. Marjanović","doi":"10.1109/ANTEM.1998.7861740","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861740","url":null,"abstract":"Properties of a novel broadband printed antenna element, printed counterpart of the conventional TV UHF panel antenna with very large bandwidth, has been studied. A design method and realization is presented in the paper. More than one octave measured bandwidth with VSWR less then 1.8 and directivity between 9.0 and 11.0 dBi has been achieved. Properties of the radiator as an array element have also been investigated.","PeriodicalId":397063,"journal":{"name":"2006 12th International Symposium on Antenna Technology and Applied Electromagnetics and Canadian Radio Sciences Conference","volume":"152 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116067563","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}
引用次数: 1
Evaluation of the FVTD technique for electromagnetic field problems containing highly inhomogeneous structures 高度非均匀结构电磁场问题的FVTD技术评价
2006 12th International Symposium on Antenna Technology and Applied Electromagnetics and Canadian Radio Sciences Conference Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861774
R. Siushansian, N. Simons, J. Lovetri
{"title":"Evaluation of the FVTD technique for electromagnetic field problems containing highly inhomogeneous structures","authors":"R. Siushansian, N. Simons, J. Lovetri","doi":"10.1109/ANTEM.1998.7861774","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861774","url":null,"abstract":"In this paper, the cut-off frequency of the dominant mode of a finned waveguide is computed using the Symmetric Condensed Node Transmission Line Matrix (SCN-TLM) and Finite Volume Time Domain (FVTD) methods. The cut-off frequencies are computed for various sizes of fins as well as fine and coarse meshes. The values of the cut-off frequencies are obtained and compared with each other and with a benchmark solution.","PeriodicalId":397063,"journal":{"name":"2006 12th International Symposium on Antenna Technology and Applied Electromagnetics and Canadian Radio Sciences Conference","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134030226","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}
引用次数: 0
Offset characteristics of elliptic fresnel-zone-plate lens 椭圆菲涅耳带板透镜的偏置特性
2006 12th International Symposium on Antenna Technology and Applied Electromagnetics and Canadian Radio Sciences Conference Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861718
T. Hoashi, T. Onodera, Etsuro Kimura
{"title":"Offset characteristics of elliptic fresnel-zone-plate lens","authors":"T. Hoashi, T. Onodera, Etsuro Kimura","doi":"10.1109/ANTEM.1998.7861718","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861718","url":null,"abstract":"Fresnel-zone-plate lens (FZPL) is an application of Huygens-Fresnel's principle. By placing alternate transparent and non-transparent part, waves of opposite phases are reflected on the non-transparent part, while wave of same phases are collected by letting pass through the transparent part. FZPL can be used for satellite TV receptions [1],[2],[3] and radio telescopes [4]. The paper treats the FZPL with a conical horn as receiving antenna by using Kirchhoff's diffraction integral formula and evaluates distributions of power flux density over the conical horn and receiving powers of the FZPL with the conical horn. By receiving the Broadcasting satellite signal, the receiving power of the converter is measured around the focal point.","PeriodicalId":397063,"journal":{"name":"2006 12th International Symposium on Antenna Technology and Applied Electromagnetics and Canadian Radio Sciences Conference","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124464770","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}
引用次数: 0
Phase properties of a variable-patch-size microstrip reflectarray 可变贴片尺寸微带反射阵列的相位特性
2006 12th International Symposium on Antenna Technology and Applied Electromagnetics and Canadian Radio Sciences Conference Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861779
K. Y. Sze, L. Shafai
{"title":"Phase properties of a variable-patch-size microstrip reflectarray","authors":"K. Y. Sze, L. Shafai","doi":"10.1109/ANTEM.1998.7861779","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861779","url":null,"abstract":"In general, despite the seemingly many advantages of the microstrip reflectarrays, one of the most serious shortcomings of these devices is the issue of limited bandwidth [1]. To improve the bandwidth of the variable-patch-size microstrip refiectarray, the variation in the patch size must be studied more thoroughly so that its phase variation properties, and thus its bandwidth characteristics, can be determined more accurately. Other important parameters such as the substrate relative permittivity and the substrate thickness are analyzed as well.","PeriodicalId":397063,"journal":{"name":"2006 12th International Symposium on Antenna Technology and Applied Electromagnetics and Canadian Radio Sciences Conference","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128094979","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}
引用次数: 1
Boundary conditions at edges 边缘处的边界条件
2006 12th International Symposium on Antenna Technology and Applied Electromagnetics and Canadian Radio Sciences Conference Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861796
Yun Xu, Hong-ming Chen
{"title":"Boundary conditions at edges","authors":"Yun Xu, Hong-ming Chen","doi":"10.1109/ANTEM.1998.7861796","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861796","url":null,"abstract":"One of the important aspects in the solution of field problems using numerical techniques such as the finite difference (FD) method is the treatment of the field behavior near a sharp edge. In this paper, we propose discretized forms of the boundary conditions at the edges of wedges on the surfaces of which the homogeneous Neumann condition is imposed. The boundary conditions are derived through discretization of the field expressions that already satisfy the edge condition in the vicinity of the edges and thus can properly characterize the field behaviors there. Numerical results show the validity and high accuracy of the present treatment.","PeriodicalId":397063,"journal":{"name":"2006 12th International Symposium on Antenna Technology and Applied Electromagnetics and Canadian Radio Sciences Conference","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131640916","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}
引用次数: 0
Computing electromagnetic fields in inhomogeneous media using lattice gas automata 用点阵气体自动机计算非均匀介质中的电磁场
2006 12th International Symposium on Antenna Technology and Applied Electromagnetics and Canadian Radio Sciences Conference Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861801
M. Zhang, D. Cule, L. Shafai, G. Bridges, N. Simons
{"title":"Computing electromagnetic fields in inhomogeneous media using lattice gas automata","authors":"M. Zhang, D. Cule, L. Shafai, G. Bridges, N. Simons","doi":"10.1109/ANTEM.1998.7861801","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861801","url":null,"abstract":"Lattice Gas Automata (LGA) can be considered as an alternative to the conventional differential equation description of problems in electromagnetics. LGAs are discrete dynamical systems that are based on a microscopic model of the physics being simulated. The basic constituents of an LGA are discrete cells. These cells are interconnected according to certain symmetric requirements to form an extremely large regular lattice. The cells of an LGA are extremely simple, requiring only a few bits to completely describe their states. Even through they are simple however, the collective behaviour of LGA microscopic systems are capable of exhibiting those behaviours described by partial differential equations for real physical systems. One type of simple LGA, the HPP LGA, is constructed with only a few bits per cell and operated on a rectangular lattice. We have demonstrated [1] that it is capable of simulating two dimensional electromagnetic fields. Furthermore, the inherent parallelism and simplicity of LGA algorithms make them ideally suited to implementation in a parallel processing architecture.","PeriodicalId":397063,"journal":{"name":"2006 12th International Symposium on Antenna Technology and Applied Electromagnetics and Canadian Radio Sciences Conference","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125785489","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}
引用次数: 6
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