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2007 IEEE Applied Electromagnetics Conference (AEMC)最新文献

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Microwave dielectric properties of Ca[(Li1/3Nb2/3)1-xTix]O3-δ-Lithium Magnesium Zinc borosilicate ceramic-glass composite for LTCC applications LTCC用Ca[(Li1/3Nb2/3)1-xTix]O3-δ-硼硅锂镁锌陶瓷-玻璃复合材料的微波介电性能
2007 IEEE Applied Electromagnetics Conference (AEMC) Pub Date : 2007-12-01 DOI: 10.1109/AEMC.2007.4638032
S. George, M. Sebastian
{"title":"Microwave dielectric properties of Ca[(Li1/3Nb2/3)1-xTix]O3-δ-Lithium Magnesium Zinc borosilicate ceramic-glass composite for LTCC applications","authors":"S. George, M. Sebastian","doi":"10.1109/AEMC.2007.4638032","DOIUrl":"https://doi.org/10.1109/AEMC.2007.4638032","url":null,"abstract":"The Ca[(Li<sub>1/3</sub>Nb<sub>2/3</sub>)<sub>1-x</sub>Ti<sub>x</sub>]O<sub>3-delta</sub> (x=0.2 and 0.25) (CLNT) ceramics with Lithium Magnesium Zinc Borosilicate (LMZBS) glasses were prepared by conventional solid state ceramic route. The crystal structure and microstructure of the glass added and sintered CLNT ceramics were studied using X-ray diffractometer and Scanning electron microscope. The addition of LMZBS glasses improved the densification and lowered the sintering temperature of CLNT ceramics from 1175degC to 900degC without degrading the microwave dielectric properties. The tau<sub>f</sub> value is tuned by increasing the titanium content in the Ca[(Li<sub>1/3</sub>Nb<sub>2/3</sub>)<sub>0.8</sub>Ti<sub>0.2</sub>]O<sub>3-delta</sub> ceramics. The Ca[(Li<sub>1/3</sub>Nb<sub>2/3</sub>)<sub>0.75</sub>Ti<sub>0.25</sub>]O<sub>3-delta</sub> ceramics with 12 wt% of LMZBS and sintered at 900degC/4h has epsiv<sub>tau</sub>=28.52, Q<sub>u</sub>xf =11000 GHz and tau<sub>f</sub> = -3 ppm/degC. This results shows that the Ca[(Li<sub>1/3</sub>Nb<sub>2/3</sub>)<sub>0.75</sub>Ti<sub>0.25</sub>]O<sub>3-delta</sub> ceramics with suitable amount of LMZBS glass addition can find application in LTCC based devices.","PeriodicalId":397229,"journal":{"name":"2007 IEEE Applied Electromagnetics Conference (AEMC)","volume":"23 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":"133091828","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 CAD neural model for shielded and conductor backed CPW 一种屏蔽式和导体背压式CPW的CAD神经模型
2007 IEEE Applied Electromagnetics Conference (AEMC) Pub Date : 2007-12-01 DOI: 10.1109/AEMC.2007.4638026
P. Selvan, S. Raghavan, S. Suganthi
{"title":"A CAD neural model for shielded and conductor backed CPW","authors":"P. Selvan, S. Raghavan, S. Suganthi","doi":"10.1109/AEMC.2007.4638026","DOIUrl":"https://doi.org/10.1109/AEMC.2007.4638026","url":null,"abstract":"In this paper a CAD approach based on ANNs was successfully introduced to determine the parasitic effects occurred in (effective dielectric and characteristics impedance) Coplanar Wave guide (CPW) with upper shielding and conductor backing. ANNs were trained with three learning algorithms to obtain better performance and faster convergence with simpler structure. The best results were obtained with Levenberg-marquardt algorithms. The quasi-static parameters of two different CPW configurations can be calculated using the neural model proposed in this work very accurately.","PeriodicalId":397229,"journal":{"name":"2007 IEEE Applied Electromagnetics Conference (AEMC)","volume":"32 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":"133333897","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
Computation of induced fields in the human torso at low frequencies due to contact electrodes using the ADI-FDTD method 使用ADI-FDTD方法计算接触电极在低频下人体躯干的感应场
2007 IEEE Applied Electromagnetics Conference (AEMC) Pub Date : 2007-12-01 DOI: 10.1109/AEMC.2007.4638023
V. Singh, Ajeet, G. Lazzi
{"title":"Computation of induced fields in the human torso at low frequencies due to contact electrodes using the ADI-FDTD method","authors":"V. Singh, Ajeet, G. Lazzi","doi":"10.1109/AEMC.2007.4638023","DOIUrl":"https://doi.org/10.1109/AEMC.2007.4638023","url":null,"abstract":"The alternating-direction implicit (ADI) finite-difference time-domain (FDTD) method allows larger time steps than the traditional explicit method by bypassing the Courant limit, thus leading to shorter simulation times. In this paper, the use of the ADI-FDTD method in D-H formulation, to compute low-frequency induced fields due to contact electrodes in the human body is reported. Since the frequency is low (120 KHz), quasi-static assumptions have been used to reduce the number of time steps required. An averaging scheme based on Discrete-Fourier Transforms (DFT) have been used to obtain the ratio of the induced field magnitudes to the source, which can then be scaled for any applied signal magnitude.","PeriodicalId":397229,"journal":{"name":"2007 IEEE Applied Electromagnetics Conference (AEMC)","volume":"15 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":"133712337","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
Electromagnetic theory made easy 电磁理论变得简单
2007 IEEE Applied Electromagnetics Conference (AEMC) Pub Date : 2007-12-01 DOI: 10.1109/AEMC.2007.4638054
P. Mohanan
{"title":"Electromagnetic theory made easy","authors":"P. Mohanan","doi":"10.1109/AEMC.2007.4638054","DOIUrl":"https://doi.org/10.1109/AEMC.2007.4638054","url":null,"abstract":"Exploring electromagnetism and Maxwellpsilas equations through simple animations and day to day examples.","PeriodicalId":397229,"journal":{"name":"2007 IEEE Applied Electromagnetics Conference (AEMC)","volume":"21 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":"122790461","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
Frequency reconfigurable microstrip circular patch array antenna integrated with RF-MEMS switches 集成RF-MEMS开关的频率可重构微带圆形贴片阵列天线
2007 IEEE Applied Electromagnetics Conference (AEMC) Pub Date : 2007-12-01 DOI: 10.1109/AEMC.2007.4638022
N. K. Saxena, P. Pourush
{"title":"Frequency reconfigurable microstrip circular patch array antenna integrated with RF-MEMS switches","authors":"N. K. Saxena, P. Pourush","doi":"10.1109/AEMC.2007.4638022","DOIUrl":"https://doi.org/10.1109/AEMC.2007.4638022","url":null,"abstract":"A microstrip reconfigurable array antenna with integrated RF-MEMS switches is proposed which can operate at dual frequencies. The switches are incorporated to circular patch to control or change the frequency. The array of these circular patches gives more directivity and scanning power, which makes it useful in many communication systems.","PeriodicalId":397229,"journal":{"name":"2007 IEEE Applied Electromagnetics Conference (AEMC)","volume":"1 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":"129045494","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
Design of discrete phase-only dual-beam array antennas with minimum dynamic range ratio 最小动态范围比的离散纯相位双波束阵列天线设计
2007 IEEE Applied Electromagnetics Conference (AEMC) Pub Date : 2007-12-01 DOI: 10.1109/AEMC.2007.4638009
T. K. Sinhamahapatra, A. Ahmed, G. K. Mahanti, N. Pathak, A. Chakrabarty
{"title":"Design of discrete phase-only dual-beam array antennas with minimum dynamic range ratio","authors":"T. K. Sinhamahapatra, A. Ahmed, G. K. Mahanti, N. Pathak, A. Chakrabarty","doi":"10.1109/AEMC.2007.4638009","DOIUrl":"https://doi.org/10.1109/AEMC.2007.4638009","url":null,"abstract":"In this paper, we describe the use of real-coded genetic algorithm (GA) for design of reconfigurable dual-beam linear isotropic antenna arrays with phase-only control of discrete phase shifters. The problem is to find a fixed amplitude distribution that will generate two broadside symmetrical beams in vertical plane: a pencil beam with zero phases and a flat-top beam with discrete phases of a five-bit discrete phase shifter, with or without minimizing dynamic range ratio (amax/amin) of excitation amplitude distribution.","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":"129384597","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
Studies on application of fractal based geometries in printed antenna structures 分形几何在印刷天线结构中的应用研究
2007 IEEE Applied Electromagnetics Conference (AEMC) Pub Date : 2007-12-01 DOI: 10.1109/AEMC.2007.4638065
A. Harish, R.K. Joshi
{"title":"Studies on application of fractal based geometries in printed antenna structures","authors":"A. Harish, R.K. Joshi","doi":"10.1109/AEMC.2007.4638065","DOIUrl":"https://doi.org/10.1109/AEMC.2007.4638065","url":null,"abstract":"Several novel antenna structures based on a combination of regular and fractal shaped elements are presented. It has been shown with case studies that the performance of the antennas can be optimized by judicious choice of fractal geometries. Though the fractal elements have a high degree of regularity, introduction of certain irregularities in the structures can result in improved performance of the antennas. Both directly coupled and parasitically coupled fractal elements have been used to construct these novel antenna structures.","PeriodicalId":397229,"journal":{"name":"2007 IEEE Applied Electromagnetics Conference (AEMC)","volume":"8 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":"126846450","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
Effect of zincborosilicate glass on the sinterability and microwave dielectric properties of 0.95MgTiO3-0.05CaTiO3 锌硼硅酸盐玻璃对0.95 mgtio3 -0.05 5catio3烧结性能和微波介电性能的影响
2007 IEEE Applied Electromagnetics Conference (AEMC) Pub Date : 2007-12-01 DOI: 10.1109/AEMC.2007.4638031
M. A. Sanoj, S. Soumya, M. Varma
{"title":"Effect of zincborosilicate glass on the sinterability and microwave dielectric properties of 0.95MgTiO3-0.05CaTiO3","authors":"M. A. Sanoj, S. Soumya, M. Varma","doi":"10.1109/AEMC.2007.4638031","DOIUrl":"https://doi.org/10.1109/AEMC.2007.4638031","url":null,"abstract":"The phase pure dielectric ceramic with composition 0.95MgTiO<sub>3</sub>-0.05CaTiO<sub>3</sub> (MCT) were prepared using solid state ceramic route and the effect of 60-ZnO30-B<sub>2</sub>O<sub>3</sub>10-SiO<sub>2</sub> (ZBS) on the sinterability, microstructure and dielectric properties were studied. The structural characterization using X-ray diffraction (XRD), microstructure analysis, was carried out using SEM microstructure EDAX and the microwave dielectric properties of different composite composition samples for different compositions were carried out. A ceramic composite whose sintering temperature is 1050degC, with dielectric properties epsiv<sub>r</sub> = 17.7 and Qxf = 29000 when 15wt% glass was added to 0.95MgTiO<sub>3</sub>-0.05CaTiO<sub>3</sub>.","PeriodicalId":397229,"journal":{"name":"2007 IEEE Applied Electromagnetics Conference (AEMC)","volume":"138 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":"124207019","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
Design of a tunable ultraviolet filter using metallodielectric photonic crystal 金属介电光子晶体可调谐紫外滤波器的设计
2007 IEEE Applied Electromagnetics Conference (AEMC) Pub Date : 2007-12-01 DOI: 10.1109/AEMC.2007.4638034
A. Banerjee, U. Malaviya
{"title":"Design of a tunable ultraviolet filter using metallodielectric photonic crystal","authors":"A. Banerjee, U. Malaviya","doi":"10.1109/AEMC.2007.4638034","DOIUrl":"https://doi.org/10.1109/AEMC.2007.4638034","url":null,"abstract":"A theory to design a tunable ultraviolet filter using a 1-D metallodielectric photonic crystal composed of alternate layers of MgF2 and Co is proposed. It is possible to get different ranges of ultraviolet spectrum transmitted through the structure by varying the angle of incidence light. Due to high refractive index contrast in the present structure, regions of transmission separated by well-defined regions of high reflectivity (the photonic band gaps) are obtained with only 12 periods. The use of small number of periods in the present filter structure has advantages of small filter size, low weight and cost.","PeriodicalId":397229,"journal":{"name":"2007 IEEE Applied Electromagnetics Conference (AEMC)","volume":"73 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":"131150798","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
Who was James Clerk Maxwell and what is/was his electromagnetic theory 詹姆斯·克拉克·麦克斯韦是谁?他的电磁理论是什么
2007 IEEE Applied Electromagnetics Conference (AEMC) Pub Date : 2007-12-01 DOI: 10.1109/AEMC.2007.4638068
T. Sarkar
{"title":"Who was James Clerk Maxwell and what is/was his electromagnetic theory","authors":"T. Sarkar","doi":"10.1109/AEMC.2007.4638068","DOIUrl":"https://doi.org/10.1109/AEMC.2007.4638068","url":null,"abstract":"The electromagnetic community makes a living out of Maxwellpsilas name yet very few researchers really know what actually did Maxwell do? The goal of this presentation is to make the point that Maxwell was one of the greatest scientist of the last century and he could be called so even if he did not do any work on electromagnetic theory. He did develop however almost all aspects of electrical engineering and many branches of modern physics. His name is primarily associated with the famous four equations called Maxwellpsilas equations. The crux of the matter is that Maxwell did not write those four equations that we use today. They were first put in the scalar form by Heinrich Hertz and in the vector form by Oliver Heaviside, who did not even have a college education! That is why Einstein used to call it the Maxwell-Hertz-Heaviside equations. The goal of this presentation is to illustrate those points and finally what exactly did Maxwell do to come to the conclusion that light was electromagnetic in nature.","PeriodicalId":397229,"journal":{"name":"2007 IEEE Applied Electromagnetics Conference (AEMC)","volume":"140 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":"134451913","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
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