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2007 IEEE Applied Electromagnetics Conference (AEMC)最新文献

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Design of left-handed metamaterials using hexagonal split ring resonator at S-band frequencies s波段六角形分裂环谐振器设计左手超材料
2007 IEEE Applied Electromagnetics Conference (AEMC) Pub Date : 2007-12-01 DOI: 10.1109/AEMC.2007.4638037
K. Chandrasekhar, D. Mishra, D. R. Poddar, R. K. Mishra
{"title":"Design of left-handed metamaterials using hexagonal split ring resonator at S-band frequencies","authors":"K. Chandrasekhar, D. Mishra, D. R. Poddar, R. K. Mishra","doi":"10.1109/AEMC.2007.4638037","DOIUrl":"https://doi.org/10.1109/AEMC.2007.4638037","url":null,"abstract":"This paper proposes a new structure for left handed metamaterials by using hexagonal split ring resonators (HGSRR) and thin wires (TW) at S-band. The effect of geometrical parameters like split width, number of splits of HGSRR on magnetic resonance frequency behaviour is investigated. It is observed that there is an increase in the resonant frequency of SRR by increasing the number of splits. The left handed behaviour of composite structure (HGSRR+TW) is also verified with graphical simulated results and by numerical retrieval of parameters.","PeriodicalId":397229,"journal":{"name":"2007 IEEE Applied Electromagnetics Conference (AEMC)","volume":"127 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127074355","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: 4
A MMIC control chipset for T/R modules - A SiP approach 用于T/R模块的MMIC控制芯片组-一种SiP方法
2007 IEEE Applied Electromagnetics Conference (AEMC) Pub Date : 2007-12-01 DOI: 10.1109/AEMC.2007.4638052
P.S. Vasu
{"title":"A MMIC control chipset for T/R modules - A SiP approach","authors":"P.S. Vasu","doi":"10.1109/AEMC.2007.4638052","DOIUrl":"https://doi.org/10.1109/AEMC.2007.4638052","url":null,"abstract":"This paper describes the design and development of S-band GaAs MMIC chipset consisting of a digital phase shifter, a digital attenuator, and a SPDT switch. The MMICs have been designed using a mature 0.5mum InGaAs pHEMT technology. To offer an attractive solution for phased array systems, the chipset has been integrated in a small form factor hermetically sealed metal package with plug and play features. The package design has been carried out in-house and reflects a System in Package (SiP) approach suited for high volume production. The integrated control component offers typically 9dB of insertion loss, a RMS phase error of 1.5 deg and a RMS attenuation error of 0.1 dB. The module features a high isolation of 55 dB between transmit and receive ports. The developed control module has been tested successfully in beam forming systems. The design of the constituent MMICs are presented in the initial sections followed by the description of the SiP module and the performance of the integrated entity.","PeriodicalId":397229,"journal":{"name":"2007 IEEE Applied Electromagnetics Conference (AEMC)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129237266","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
Optimization of a Sierpinski Carpet Pre-Fractal planar monopole antenna using Real Coded Genetic Algorithm for wideband application 基于实数编码遗传算法的Sierpinski地毯预分形平面单极天线宽带优化
2007 IEEE Applied Electromagnetics Conference (AEMC) Pub Date : 2007-12-01 DOI: 10.1109/AEMC.2007.4638018
R. Ghatak, R. K. Mishra, D. Poddar
{"title":"Optimization of a Sierpinski Carpet Pre-Fractal planar monopole antenna using Real Coded Genetic Algorithm for wideband application","authors":"R. Ghatak, R. K. Mishra, D. Poddar","doi":"10.1109/AEMC.2007.4638018","DOIUrl":"https://doi.org/10.1109/AEMC.2007.4638018","url":null,"abstract":"A Sierpinski Carpet Pre-Fractal planar monopole antenna with coplanar waveguide feed is optimized to obtain wide impedance bandwidth of 73% that extends from 4.9 GHz to 10.5GHz. Real Coded Genetic Algorithm involving Wrightpsilas heuristic crossover in conjunction with non-uniform mutation aids the optimization process. The effectiveness of the operators used in implementing the algorithm is discussed and outputs of five different runs are summarized. The radiation pattern and gain of around 4.25 dBi suggests that it can be used for wireless communication applications.","PeriodicalId":397229,"journal":{"name":"2007 IEEE Applied Electromagnetics Conference (AEMC)","volume":"88 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125721241","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
A compact dualband planar antenna for IMT-2000 and WLAN applications 用于IMT-2000和WLAN应用的紧凑型双频平面天线
2007 IEEE Applied Electromagnetics Conference (AEMC) Pub Date : 2007-12-01 DOI: 10.1109/AEMC.2007.4638012
G. Augustin, V. Sarin, M. S. Nishamol, P. Mohanan, C. Aanandan, K. Vasudevan
{"title":"A compact dualband planar antenna for IMT-2000 and WLAN applications","authors":"G. Augustin, V. Sarin, M. S. Nishamol, P. Mohanan, C. Aanandan, K. Vasudevan","doi":"10.1109/AEMC.2007.4638012","DOIUrl":"https://doi.org/10.1109/AEMC.2007.4638012","url":null,"abstract":"A compact dualband planar antenna developed for IMT-2000 and WLAN applications is presented. The compact planar antenna consists of a flared monopole with an additional sleeve for dual band applications. The overall size of the antenna is 40 mm times 25 mm times 1.6 mm including the Finite Ground CPW feeding mechanism. The measured -10 dB band width for returnloss is from 1.91 - 2.34 GHz and 3.21 - 5.58 GHz covering IMT-2000 and WLAN bands. Simulation results along with measurements from the prototyped antenna are presented.","PeriodicalId":397229,"journal":{"name":"2007 IEEE Applied Electromagnetics Conference (AEMC)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129194085","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 simple technique for the measurement of the permittivity of medium loss samples using cavity perturbation method 一种用腔微扰法测量介质损耗样品介电常数的简单方法
2007 IEEE Applied Electromagnetics Conference (AEMC) Pub Date : 2007-12-01 DOI: 10.1109/AEMC.2007.4638036
P. Banerjee, G. Ghosh, S. K. Biswas
{"title":"A simple technique for the measurement of the permittivity of medium loss samples using cavity perturbation method","authors":"P. Banerjee, G. Ghosh, S. K. Biswas","doi":"10.1109/AEMC.2007.4638036","DOIUrl":"https://doi.org/10.1109/AEMC.2007.4638036","url":null,"abstract":"The cavity perturbation method is widely used in the study of electromagnetic properties of dielectric materials at X-band frequencies. It works well for the measurement of low-loss and medium loss materials. In this paper an easy and reliable method is discussed for the accurate determination of the dielectric constant of medium loss samples such as Teflon and Perspex.","PeriodicalId":397229,"journal":{"name":"2007 IEEE Applied Electromagnetics Conference (AEMC)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127812332","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
Design of broad band dual frequency right triangular microstrip antenna with slits 带狭缝的宽带双频右三角形微带天线的设计
2007 IEEE Applied Electromagnetics Conference (AEMC) Pub Date : 2007-12-01 DOI: 10.1109/AEMC.2007.4638011
V. Sharma, D. Saxena, K. Sharma
{"title":"Design of broad band dual frequency right triangular microstrip antenna with slits","authors":"V. Sharma, D. Saxena, K. Sharma","doi":"10.1109/AEMC.2007.4638011","DOIUrl":"https://doi.org/10.1109/AEMC.2007.4638011","url":null,"abstract":"The simulation results of right triangular microstrip antenna (RTMA) with and without slits are reported in this paper. The structure has three layered structure in between conducting patch and the ground plane. It is found that antenna without slits but having an air gap of 1mm between the dielectric layers, resonates at a single frequency but with much improved bandwidth (32.8%). On applying two parallel slits in this patch geometry, antenna not only resonates at two different frequencies but impedance bandwidth (VSWR 2:1) up to 33.03% and directivity up to 7.52 dBi may be achieved with it.","PeriodicalId":397229,"journal":{"name":"2007 IEEE Applied Electromagnetics Conference (AEMC)","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126207292","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
Highly efficient parallel schemes using out-of-core solver for MoM 使用核外解算器的MoM高效并行方案
2007 IEEE Applied Electromagnetics Conference (AEMC) Pub Date : 2007-12-01 DOI: 10.1109/AEMC.2007.4638049
Yu Zhang, T. Sarkar, P. Ghosh, M. Taylor, A. De
{"title":"Highly efficient parallel schemes using out-of-core solver for MoM","authors":"Yu Zhang, T. Sarkar, P. Ghosh, M. Taylor, A. De","doi":"10.1109/AEMC.2007.4638049","DOIUrl":"https://doi.org/10.1109/AEMC.2007.4638049","url":null,"abstract":"Currently, the problem size that can be solved in reasonable time using the method of moments (MoM) is limited by the amount of memory installed on the computer. This paper offers a new development which not only breaks this memory constraint, but also maintains the efficiency of running the problem in-core. In this paper, highly efficient parallel matrix filling schemes are presented for parallel in-core and parallel out-of-core method of moments (MoM) integral equation solvers with RWG basis functions. The parallel in-core solver uses RAM, which is often expensive and limited in size. The parallel out-of-core solver is introduced to extend the capability of MoM to solve larger problems which can be as large as the amount of storage on the hard disk. Numerical results on several typical computer platforms show that the parallel matrix filling schemes and matrix equation solvers introduced here are highly efficient and achieve theoretical predictions. The implementation of these advancements with the widely used RWG basis function creates a powerful tool for efficient computational electromagnetic solution of complex real world problems.","PeriodicalId":397229,"journal":{"name":"2007 IEEE Applied Electromagnetics Conference (AEMC)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130008849","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
Neural network modeling for the fast estimation of superstrate loading effect on rectangular microstrip patch antennas 矩形微带贴片天线叠加载荷效应快速估计的神经网络建模
2007 IEEE Applied Electromagnetics Conference (AEMC) Pub Date : 2007-12-01 DOI: 10.1109/AEMC.2007.4638015
S. Chakraborty, S. Mandal, B. Gupta
{"title":"Neural network modeling for the fast estimation of superstrate loading effect on rectangular microstrip patch antennas","authors":"S. Chakraborty, S. Mandal, B. Gupta","doi":"10.1109/AEMC.2007.4638015","DOIUrl":"https://doi.org/10.1109/AEMC.2007.4638015","url":null,"abstract":"A neural network model for the shift in resonant frequency of a rectangular microstrip antenna covered with a dielectric layer is presented. The primary effect of such loading is to change the resonant frequency of the antenna. The absolute value of change increases with operating frequency, relative permittivity and the thickness of the dielectric layer. This change may cause degradation in performance due to the inherently narrow bandwidth of microstrip antennas, if the effect of loading is not considered in the design. The neural network model presented here may be used to design microstrip antennas that may be subjected to icing or other atmospheric deposition or coated with protective layers. The model developed is found to be in good agreement with electromagnetic simulation using method of moments.","PeriodicalId":397229,"journal":{"name":"2007 IEEE Applied Electromagnetics Conference (AEMC)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131027076","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
Emission characteristics of a line source covered by an electromagnetic crystal embedded in a magnetized ferrite slab 嵌入磁化铁氧体板的电磁晶体覆盖线源的发射特性
2007 IEEE Applied Electromagnetics Conference (AEMC) Pub Date : 2007-12-01 DOI: 10.1109/AEMC.2007.4638030
H. Jia, K. Yasumoto, B. Gupta
{"title":"Emission characteristics of a line source covered by an electromagnetic crystal embedded in a magnetized ferrite slab","authors":"H. Jia, K. Yasumoto, B. Gupta","doi":"10.1109/AEMC.2007.4638030","DOIUrl":"https://doi.org/10.1109/AEMC.2007.4638030","url":null,"abstract":"A novel formulation of emission from a line source covered by an electromagnetic crystal embedded in a magnetized ferrite slab with a perfectly conductive reflection-plate is described. The method employs the spectral domain approach. The spectral response of electromagnetic crystal embedded in a magnetized ferrite slab is calculated using the lattice sums, the T-matrix of a circular cylinder in magnetized ferrite medium, and the generalized reflection and transmission matrices. The line source is transformed into an infinite periodic array of linearly phased dipole in the spectral domain. The scattered fields including near fields and far-zone fields are exactly expressed by an infinite integral. The far-zone fields can be approached by a method of steepest descent without performing this integration. The radiation patterns of a line current source covered by an electromagnetic crystal embedded in a magnetized ferrite slab have been discussed in several different cases.","PeriodicalId":397229,"journal":{"name":"2007 IEEE Applied Electromagnetics Conference (AEMC)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134128792","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
Applications of a phased array with switched time-delay units 具有切换时延单元的相控阵的应用
2007 IEEE Applied Electromagnetics Conference (AEMC) Pub Date : 2007-12-01 DOI: 10.1109/AEMC.2007.4638005
Q. M. Alfred, N. Chopra, T. Chakravarty, G. Singh, S. K. Sanyal
{"title":"Applications of a phased array with switched time-delay units","authors":"Q. M. Alfred, N. Chopra, T. Chakravarty, G. Singh, S. K. Sanyal","doi":"10.1109/AEMC.2007.4638005","DOIUrl":"https://doi.org/10.1109/AEMC.2007.4638005","url":null,"abstract":"Authors have in previous publications demonstrated the generation of SUM and DIFFERENCE patterns in a programmable phased array consisting of time-delay units. In this paper a few applications of such programmable phased array are highlighted. Delay-line cancellation method is revisited and it is shown that blind speed can be eliminated. Similarly some adaptive beam formation and interference rejection techniques are presented.","PeriodicalId":397229,"journal":{"name":"2007 IEEE Applied Electromagnetics Conference (AEMC)","volume":"243 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113999812","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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