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An interactive simulation toolbox for computer-aided learning of wave propagation in dielectric and optical waveguides 用于计算机辅助学习介质和光波导中波传播的交互式模拟工具箱
Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2000] Pub Date : 2000-07-01 DOI: 10.1109/ANTEM.2000.7851723
R. Shubair, E. M. Alardi
{"title":"An interactive simulation toolbox for computer-aided learning of wave propagation in dielectric and optical waveguides","authors":"R. Shubair, E. M. Alardi","doi":"10.1109/ANTEM.2000.7851723","DOIUrl":"https://doi.org/10.1109/ANTEM.2000.7851723","url":null,"abstract":"A combination of analytical and numerical techniques is used to develop an efficient and robust computer-aided toolbox that allows for an interactive simulation and visualization of wave propagation in dielectric and optical waveguides. The toolbox has been developed using MATLAB programming language exploiting its powerful graphical features that allow for both the 2D and 3D propagation patterns to be interactively displayed along the waveguide structure. A user-friendly graphical interface is also developed to ease the use of the toolbox.","PeriodicalId":416991,"journal":{"name":"Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2000]","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122341194","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
Near fields of a portable radio in front of and on the far side of a model of the head 在头部模型前面和远端的便携式收音机的近场
Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2000] Pub Date : 2000-07-01 DOI: 10.1109/ANTEM.2000.7851740
C. Trueman, S. Kubina, D. Cule, W. Lauber
{"title":"Near fields of a portable radio in front of and on the far side of a model of the head","authors":"C. Trueman, S. Kubina, D. Cule, W. Lauber","doi":"10.1109/ANTEM.2000.7851740","DOIUrl":"https://doi.org/10.1109/ANTEM.2000.7851740","url":null,"abstract":"A portable radio such as a cellular telephone that is held against the side of the head induces fields in and around the head. This paper investigates the electric field strength in front of and on the far side of the head due to a vertically-oriented portable radio. The head is represented either by a box or by a sphere. The finite-difference time-domain method using a perfectly-matched layer absorbing boundary is used to compute the fields. The fields are measured using a three-axis probe moved over a plane by a robot positioning system. Good agreement is demonstrated between the measurements and the computations for field components strong enough for an adequate signal to noise ratio in the measured data.","PeriodicalId":416991,"journal":{"name":"Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2000]","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127869214","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
Radiation from loops next to a sphere in a radome 天线罩中球体附近的环形辐射
Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2000] Pub Date : 2000-07-01 DOI: 10.1109/ANTEM.2000.7851704
H. Partal, J. Mautz, E. Arvas
{"title":"Radiation from loops next to a sphere in a radome","authors":"H. Partal, J. Mautz, E. Arvas","doi":"10.1109/ANTEM.2000.7851704","DOIUrl":"https://doi.org/10.1109/ANTEM.2000.7851704","url":null,"abstract":"Radiation from multiple circular loop antennas of different radii and of different current values is considered. Parallel circular loops lie on an imaginary spherical surface of radius a. A conducting or dielectric sphere of radius b<a and a dielectric shell of inner radius c>a and of outer radius d could be placed around the loops. The circular loops are parallel to the xy-plane and their centers are on the z-axis. The centers of the sphere and the dielectric shell are both at the origin. Eigenfunction series solutions are assumed in different regions of the problem. The unknown coefficients are computed by enforcing boundary conditions at the interfaces of these different regions.","PeriodicalId":416991,"journal":{"name":"Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2000]","volume":"136 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115931572","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
MMICs for wireless communications - design and technology tradeoffs 用于无线通信的mmic -设计和技术权衡
Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2000] Pub Date : 2000-07-01 DOI: 10.1109/ANTEM.2000.7851650
G. Brehm
{"title":"MMICs for wireless communications - design and technology tradeoffs","authors":"G. Brehm","doi":"10.1109/ANTEM.2000.7851650","DOIUrl":"https://doi.org/10.1109/ANTEM.2000.7851650","url":null,"abstract":"GaAs MMICs have been shown to provide excellent performance in wireless transceivers, especially for the emerging applications above 10 GHz.","PeriodicalId":416991,"journal":{"name":"Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2000]","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114814135","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
Planar folded slot lens for slab-beam power combining 用于板束功率组合的平面折叠槽透镜
Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2000] Pub Date : 2000-07-01 DOI: 10.1109/ANTEM.2000.7851679
H. Hammad, Y. Antar, A. Freundorfer
{"title":"Planar folded slot lens for slab-beam power combining","authors":"H. Hammad, Y. Antar, A. Freundorfer","doi":"10.1109/ANTEM.2000.7851679","DOIUrl":"https://doi.org/10.1109/ANTEM.2000.7851679","url":null,"abstract":"A new 2D quasi-optical slab beam power-combining array is introduced. A key part in the design is the Yagi-Uda like coplanar waveguide (CPW) fed directed antennas. The antennas are used to excite the dominant TM in the slab waveguide. The simulated insertion loss for a three-elements and four-elements based array is better than −4 dB. The proposed design has the advantage of being planar with only one dielectric layer being used, and it is compatible with MMIC fabrication techniques.","PeriodicalId":416991,"journal":{"name":"Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2000]","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127220091","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
A comparison between numerical results of SEMN method and ENSEMBEL for finite microstrip antennas 有限微带天线SEMN法与ENSEMBEL法数值结果的比较
Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2000] Pub Date : 2000-07-01 DOI: 10.1109/ANTEM.2000.7851734
L. Shafai, F. Tavakkol-Hamedani, A. Tavakoli
{"title":"A comparison between numerical results of SEMN method and ENSEMBEL for finite microstrip antennas","authors":"L. Shafai, F. Tavakkol-Hamedani, A. Tavakoli","doi":"10.1109/ANTEM.2000.7851734","DOIUrl":"https://doi.org/10.1109/ANTEM.2000.7851734","url":null,"abstract":"Using surface equivalence principle and multiple network theory (SEMN) several finite microstrip antennas were analyzed and their numerical results were compared with those of ENSEMBEL (an electromagnetic simulation software for microstrip antennas) [1]. It was derived that an infinite substrate assumption is considered in ENSEMBEL which results in zero electromagnetic radiation patterns at grazing angles and inaccurate numerical results for small substrate dimensions. In SEMN method, it was derived that a large number of surface segments are required for finite microstrip antennas that their substrates are not electrically too small.","PeriodicalId":416991,"journal":{"name":"Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2000]","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123598829","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
Equivalent circuit for a microstrip step discontinuity 微带阶跃不连续的等效电路
Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2000] Pub Date : 2000-07-01 DOI: 10.1109/ANTEM.2000.7851741
A. Ţugulea, I. Ciric
{"title":"Equivalent circuit for a microstrip step discontinuity","authors":"A. Ţugulea, I. Ciric","doi":"10.1109/ANTEM.2000.7851741","DOIUrl":"https://doi.org/10.1109/ANTEM.2000.7851741","url":null,"abstract":"In order to validate the formulation presented and the formulas derived in this paper, we compare results for the scattering matrix of the equivalent circuit of the step discontinuity with available published data. The equivalent circuit for a step discontinuity is shown in Fig. 2.","PeriodicalId":416991,"journal":{"name":"Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2000]","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131874848","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
Low-cost square cross section helical antennas 低成本的方形截面螺旋天线
Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2000] Pub Date : 2000-07-01 DOI: 10.1109/ANTEM.2000.7851651
M. C. Britton, J. Wight, P. Strickland
{"title":"Low-cost square cross section helical antennas","authors":"M. C. Britton, J. Wight, P. Strickland","doi":"10.1109/ANTEM.2000.7851651","DOIUrl":"https://doi.org/10.1109/ANTEM.2000.7851651","url":null,"abstract":"Square and other cross section helical antennas have several advantages over the conventional circular cross section helical antennas used in satellite communication and other applications. The linear segments which make up a. square cross section helical antenna can be easily supported on a structure which can be cheaply designed and manufactured even for variable cross section or pitch helical antennas. This structure has the additional advantage of having minimal conductor-dielectric proximity, thus virtually eliminating unwanted frequency shift and loss due to dielectric loading. The linear elements are also well suited to simulation using the method of moments, in which cylindrical conductors are nearly always standard elements. Other polygonal cross sections allow some improvement in the axial ratio performance of the helical antennas. The theory and history of helical antennas is discussed, and axial-mode helical antenna models designed to illustrate the relative performance of circular and square helical antennas are presented. Simulations of these models and others with other cross sections were performed using WIPL, a method-of-moments simulation software package, and these simulation results are discussed. Circular and square helical antennas were constructed and measured, and the effects of dielectric loading immediately within the helical winding measured. These simulation and measurement results illustrate the performance advantages of square and other non-circular cross sections for helical antennas.","PeriodicalId":416991,"journal":{"name":"Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2000]","volume":"165 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128359581","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: 3
Investigation of novel Reflectarray configurations 新型反射阵结构的研究
Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2000] Pub Date : 2000-07-01 DOI: 10.1109/ANTEM.2000.7851683
M. Keller, M. Cuhaci, J. Shaker, A. Petosa, A. Ittipiboon, Y. Antar
{"title":"Investigation of novel Reflectarray configurations","authors":"M. Keller, M. Cuhaci, J. Shaker, A. Petosa, A. Ittipiboon, Y. Antar","doi":"10.1109/ANTEM.2000.7851683","DOIUrl":"https://doi.org/10.1109/ANTEM.2000.7851683","url":null,"abstract":"The Reflectarray has been proposed as an alternative antenna to a parabolic reflector and a microstrip patch array for high gain applications. Recently published work on Reflectarray antennas has focused on variable length or stub-loaded microstrip patch configurations. This presentation discusses two novel Reflectarray antennas. First, the concept of an aperture-coupled microstrip patch reflectarray antenna is introduced, then a circularly polarised (CP) Reflectarray based on this configuration is described. Experimental results showed that good CP performance could be obtained by using this technique, with the added advantage that a CP feed is not required.","PeriodicalId":416991,"journal":{"name":"Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2000]","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130466826","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
System characteristics of generalized active-phased-array antennas 广义有源相控阵天线的系统特性
Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2000] Pub Date : 2000-07-01 DOI: 10.1109/ANTEM.2000.7851743
K. Ueno
{"title":"System characteristics of generalized active-phased-array antennas","authors":"K. Ueno","doi":"10.1109/ANTEM.2000.7851743","DOIUrl":"https://doi.org/10.1109/ANTEM.2000.7851743","url":null,"abstract":"The characteristics, such as antenna temperature, G/T and EIRP, of active-phased-array antennas with arbitrary elements have been derived by comparison with the directivity of a lossless passive array antenna. It was recommended that antenna temperature must be obtained from the directivity of the synthesized array antenna and not the array element. The result is quite reasonable compared to a single-feed antenna of the same gain as the array antenna. In the derivation of figures, an equivalent commutation technique was applied successfully, modeling a multichannel array feed on a lossless passive array antenna and an equivalent single channel feed. This procedure will simplify the design and evaluation of active-phased-array antennas.","PeriodicalId":416991,"journal":{"name":"Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2000]","volume":"217 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127604006","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
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