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Balanced amplifying microstrip patch antenna at 2.4 GHz 2.4 GHz平衡放大微带贴片天线
2007 IEEE Applied Electromagnetics Conference (AEMC) Pub Date : 2007-12-01 DOI: 10.1109/AEMC.2007.4638019
S. Behera, R. K. Mishra, D. R. Poddar
{"title":"Balanced amplifying microstrip patch antenna at 2.4 GHz","authors":"S. Behera, R. K. Mishra, D. R. Poddar","doi":"10.1109/AEMC.2007.4638019","DOIUrl":"https://doi.org/10.1109/AEMC.2007.4638019","url":null,"abstract":"In this paper a balanced amplifier embedded power amplifying antenna is proposed. The advantages of an ideal balanced configuration include good isolation with improved stability; good input and output external matching; cancellation in the load of products and harmonics are considered in designing a balanced configuration for the active antenna. The noise factor is slightly more than 2.21dB, where as the gain is more than 10dB without any distortion of radiation pattern at the design frequency of 2.4 GHz.","PeriodicalId":397229,"journal":{"name":"2007 IEEE Applied Electromagnetics Conference (AEMC)","volume":"72 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":"114219728","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
Integration of historical content into engineering teaching: Possible benefits and perceptions 工程教学中历史内容的整合:可能的好处和看法
2007 IEEE Applied Electromagnetics Conference (AEMC) Pub Date : 2007-12-01 DOI: 10.1109/AEMC.2007.4638053
K. Selvan
{"title":"Integration of historical content into engineering teaching: Possible benefits and perceptions","authors":"K. Selvan","doi":"10.1109/AEMC.2007.4638053","DOIUrl":"https://doi.org/10.1109/AEMC.2007.4638053","url":null,"abstract":"The challenges facing modern engineering education, in general, and microwave education, in particular, are many and warrant new educational approaches to be tried. This work is concerned with the challenge relating to the perceived absence of dasiahuman facepsila in education. The desirability of integrating historical content into engineering teaching in this context is considered. A recent survey at The University of Nottingham Malaysia Campus on the perceptions of students and staff relating to the possible benefits of this approach is reviewed.","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":"131826513","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 study on current sources used in finite-difference time-domain antenna analysis 时域有限差分天线分析中电流源的研究
2007 IEEE Applied Electromagnetics Conference (AEMC) Pub Date : 2007-12-01 DOI: 10.1109/AEMC.2007.4638028
K. Yoshitomi
{"title":"A study on current sources used in finite-difference time-domain antenna analysis","authors":"K. Yoshitomi","doi":"10.1109/AEMC.2007.4638028","DOIUrl":"https://doi.org/10.1109/AEMC.2007.4638028","url":null,"abstract":"Application of a current source to antenna analysis using the finite-difference time-domain (FDTD) method is studied. It is shown that the transient fields on a dipole antenna excited by a current source decay more rapidly than those excited by a voltage source. Contrastingly, for a loop antenna transient fields excited by a voltage source converge quickly. The input impedance of antennas with a current source is also illustrated.","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":"128569668","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
Analysis of focal region field of the offset-parabolic reflector for space-borne radiometers 星载辐射计偏置抛物面反射器焦区场分析
2007 IEEE Applied Electromagnetics Conference (AEMC) Pub Date : 2007-12-01 DOI: 10.1109/AEMC.2007.4638013
D. Pujara, Soumyabrata Chakrabarty, S. Sharma
{"title":"Analysis of focal region field of the offset-parabolic reflector for space-borne radiometers","authors":"D. Pujara, Soumyabrata Chakrabarty, S. Sharma","doi":"10.1109/AEMC.2007.4638013","DOIUrl":"https://doi.org/10.1109/AEMC.2007.4638013","url":null,"abstract":"The paper presents the analysis of the focal region field of an offset parabolic reflector antenna. The current induced on the reflector surface by an incident plane wave has been used to compute the field at the focal region. The analysis has been carried out for a reflector of diameter 1.8 meters by varying the f /d ratio and offset angle. The simulated results are presented. The validity of the analysis has been justified through comparison with the professional antenna design software.","PeriodicalId":397229,"journal":{"name":"2007 IEEE Applied Electromagnetics Conference (AEMC)","volume":"42 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":"130116714","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
Characteristics of some new composite Right/Left-handed metamaterial transmission lines 几种新型复合左/右超材料传输线的特性
2007 IEEE Applied Electromagnetics Conference (AEMC) Pub Date : 2007-12-01 DOI: 10.1109/AEMC.2007.4638038
S. Sahu, R. K. Mishra, D. R. Poddar
{"title":"Characteristics of some new composite Right/Left-handed metamaterial transmission lines","authors":"S. Sahu, R. K. Mishra, D. R. Poddar","doi":"10.1109/AEMC.2007.4638038","DOIUrl":"https://doi.org/10.1109/AEMC.2007.4638038","url":null,"abstract":"This paper proposes a new composite right/left handed transmission line metamaterial with a series parallel LC circuit & a shunt series LC tank circuit. A shorted interdigital capacitor (IDC) provide the shunt series LC tank circuit, while the right handed parasitic series inductance & shunt series capacitance are generated by the metallic connections in the direction of propagation. A transmission line model & a full wave simulation are used to calculate the left handed inductance (LL) & capacitance (CL) values of the equivalent circuit of this structure.","PeriodicalId":397229,"journal":{"name":"2007 IEEE Applied Electromagnetics Conference (AEMC)","volume":"5 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":"117326683","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 narrowband optical transmission filters using fractal Cantor multilayers 基于分形康托多层结构的窄带滤光片设计
2007 IEEE Applied Electromagnetics Conference (AEMC) Pub Date : 2007-12-01 DOI: 10.1109/AEMC.2007.4638033
A. Banerjee, U. Malaviya
{"title":"Design of narrowband optical transmission filters using fractal Cantor multilayers","authors":"A. Banerjee, U. Malaviya","doi":"10.1109/AEMC.2007.4638033","DOIUrl":"https://doi.org/10.1109/AEMC.2007.4638033","url":null,"abstract":"This paper presents a theory to design super narrow band pass optical filters using fractal Cantor multilayer structure without defect and fractal Cantor multilayer structure with embedded defect. It is shown that the width of transmission peaks can be narrowed by increasing the number of periods of the structure, while the number of peaks can be increased by either embedding defect layer in the structure or by successive repetition of the structure.","PeriodicalId":397229,"journal":{"name":"2007 IEEE Applied Electromagnetics Conference (AEMC)","volume":"7 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":"126978926","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
Development of novel microstrip antennas for use in mobile and wireless communication systems at Jadavpur University in the present decade Jadavpur大学用于移动和无线通信系统的新型微带天线的发展
2007 IEEE Applied Electromagnetics Conference (AEMC) Pub Date : 2007-12-01 DOI: 10.1109/AEMC.2007.4638058
S. Chakraborty, B. Gupta
{"title":"Development of novel microstrip antennas for use in mobile and wireless communication systems at Jadavpur University in the present decade","authors":"S. Chakraborty, B. Gupta","doi":"10.1109/AEMC.2007.4638058","DOIUrl":"https://doi.org/10.1109/AEMC.2007.4638058","url":null,"abstract":"Microstrip technology has received special importance in the domain of mobile and wireless communications because of its numerous advantages like small size, light weight, polarization versatility and others. However, it still suffers from limitations in terms of several useful parameters like band width, power handling capacity etc. Researches at Jadavpur University by the authors focussed on improving the technology throughout this decade by overcoming these obstacles. Innovative designs, novelty and creative ideas as pursued at Jadavpur University, India on the topic mentioned are reported here. Manufacturing and operational aspects are noted. Factors of influence experienced and innovations made in these recent works are enlisted in brief.","PeriodicalId":397229,"journal":{"name":"2007 IEEE Applied Electromagnetics Conference (AEMC)","volume":"3 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":"127943945","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
Performance comparison between arrays with rotating linear polarization elements and circular polarization elements 旋转线偏振元件与圆偏振元件阵列的性能比较
2007 IEEE Applied Electromagnetics Conference (AEMC) Pub Date : 2007-12-01 DOI: 10.1109/AEMC.2007.4638044
A. Bhattacharyya
{"title":"Performance comparison between arrays with rotating linear polarization elements and circular polarization elements","authors":"A. Bhattacharyya","doi":"10.1109/AEMC.2007.4638044","DOIUrl":"https://doi.org/10.1109/AEMC.2007.4638044","url":null,"abstract":"In this paper , it is shown that, for large element spacing, a rotating LP elements' array becomes 50% less aperture efficient than a CP elements' array . On the other hand, for small element spacing, the difference in aperture efficiency between the two arrays is negligibly small. Consequently, for small element spacing, the rotating LP elements' array is likely to have more overall efficiency than the CP elements' array because the latter has the additional RF loss due to polarizer circuitry. Furthermore, it is found that in the array environment the return loss bandwidth of an LP elements' array is narrower than that of a CP elements' array. In order to have a complete characterization of the two arrays, we present numerical results based on a full wave Floquet MoM analysis of slot-fed patch elements. Advantages and disadvantages of the two arrays are discussed.","PeriodicalId":397229,"journal":{"name":"2007 IEEE Applied Electromagnetics Conference (AEMC)","volume":"72 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":"130224558","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
Microwave dielectric properties of Ca5-xMgxNb4TiO17 (x = 0–3) ceramics Ca5-xMgxNb4TiO17 (x = 0-3)陶瓷的微波介电性能
2007 IEEE Applied Electromagnetics Conference (AEMC) Pub Date : 2007-12-01 DOI: 10.1109/AEMC.2007.4638035
P. Anjana, T. Joseph, M. Sebastian
{"title":"Microwave dielectric properties of Ca5-xMgxNb4TiO17 (x = 0–3) ceramics","authors":"P. Anjana, T. Joseph, M. Sebastian","doi":"10.1109/AEMC.2007.4638035","DOIUrl":"https://doi.org/10.1109/AEMC.2007.4638035","url":null,"abstract":"The Ca<sub>5-x</sub>Mg<sub>x</sub>Nb<sub>4</sub>TiO<sub>17</sub> (x = 0-3) ceramics were prepared by conventional solid state ceramic route. The microstructure of the ceramic was studied using scanning electron spectroscopy. The microwave dielectric properties (Q<sub>u</sub>xf, epsiv<sub>r</sub> and tau<sub>f</sub>) were measured using a vector network analyser. Ca<sub>5</sub>Nb<sub>4</sub>TiO<sub>17</sub> ceramics have a relative permittivity(epsiv<sub>r</sub>) of 45, quality factor (Q<sub>u</sub>xf) of 17600 GHz (at 4.13 GHz), and coefficient of temperature variation of resonant frequency (tau<sub>f</sub>)-113 ppm/degC. The variation in the microwave dielectric properties of Ca<sub>5</sub>Nb<sub>4</sub>TiO<sub>17</sub> ceramics were investigated with the increase in magnesium content. The sintering temperature reduced from 1475degC for x = 0 to 1200degC for x = 3. The quality factor increased with magnesium content and maximum Q<sub>u</sub>xf was obtained for the composition x = 2 (22500 GHz (at 3.99 GHz)). The epsiv<sub>r</sub> and tau<sub>f</sub> of Ca<sub>3</sub>Mg<sub>2</sub>Nb<sub>4</sub>TiO<sub>17</sub> ceramics were found to be 37.5 and -4.3 ppm/degC respectively. Hence Ca<sub>3</sub>Mg<sub>2</sub>Nb<sub>4</sub>TiO<sub>17</sub> ceramics are very much useful for practical applications like Dielectric resonators in filters and oscillators.","PeriodicalId":397229,"journal":{"name":"2007 IEEE Applied Electromagnetics Conference (AEMC)","volume":"29 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":"121128134","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
Comparison of numerical techniques for rectangular microstrip patch antenna 矩形微带贴片天线的数值技术比较
2007 IEEE Applied Electromagnetics Conference (AEMC) Pub Date : 2007-12-01 DOI: 10.1109/EDSSC.2007.4450108
T. Shanmuganantham, S. Raghavan, D. Sriram Kumar
{"title":"Comparison of numerical techniques for rectangular microstrip patch antenna","authors":"T. Shanmuganantham, S. Raghavan, D. Sriram Kumar","doi":"10.1109/EDSSC.2007.4450108","DOIUrl":"https://doi.org/10.1109/EDSSC.2007.4450108","url":null,"abstract":"In todaypsilas scenario higher integration and smaller layout size are the two major trends in RF and Microwave industry, lead to more prominent role in electromagnetic high order effects. Recent years the important in the development of numerical techniques has been the versatility of the method. In this paper, we have present the various numerical techniques to compute such effects in Microwave Integrated Circuit based designs, highlighting their specific features with comparison of numerical techniques for design of rectangular Microstrip Patch Antenna. Here we are compared few numerical techniques, in this Finite Element Method is a more powerful and versatile, more storage requirement, less CPU time.","PeriodicalId":397229,"journal":{"name":"2007 IEEE Applied Electromagnetics Conference (AEMC)","volume":"61 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":"122023962","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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