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1998 Symposium on Antenna Technology and Applied Electromagnetics最新文献

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Microstrip rhomboidal structures numerical modelling and applications 微带菱形结构的数值模拟及应用
1998 Symposium on Antenna Technology and Applied Electromagnetics Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861763
O. Rusu, D. Sandu, P. Gasner
{"title":"Microstrip rhomboidal structures numerical modelling and applications","authors":"O. Rusu, D. Sandu, P. Gasner","doi":"10.1109/ANTEM.1998.7861763","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861763","url":null,"abstract":"In this paper some microstrip rhomboidal resonant cavities are studied. Experimental results which confirm theoretical assumtions are presented. Also, numerical modelling results basic on the Finite Element Method are presented. Two interesting applications are suggested: selective power divider and combiner.","PeriodicalId":334204,"journal":{"name":"1998 Symposium on Antenna Technology and Applied Electromagnetics","volume":"61 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":"122232666","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
Investigation of active array geometries to optimize performance for 30 GHz portable satellite communications terminals 30ghz便携式卫星通信终端有源阵列几何结构优化研究
1998 Symposium on Antenna Technology and Applied Electromagnetics Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861738
Theresa Mekelburg, A. Petosa, A. Ittipiboon, J. Shaker, A. Sebak
{"title":"Investigation of active array geometries to optimize performance for 30 GHz portable satellite communications terminals","authors":"Theresa Mekelburg, A. Petosa, A. Ittipiboon, J. Shaker, A. Sebak","doi":"10.1109/ANTEM.1998.7861738","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861738","url":null,"abstract":"This paper describes the research and development of a cavity-structure-based 30 GHz transmitting antenna for a portable satellite communication terminal, with focus on minimizing grating lobe levels in far-field amplitude radiation patterns. A hexagonal array architecture was found to offer the best performance in terms of grating lobe level suppression.","PeriodicalId":334204,"journal":{"name":"1998 Symposium on Antenna Technology and Applied Electromagnetics","volume":"40 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":"132692323","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
Experimental investigations on displaced two layer electromagnetically coupled microstrip antenna 位移双层电磁耦合微带天线的实验研究
1998 Symposium on Antenna Technology and Applied Electromagnetics Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861791
P. Vasistha, B. R. Vishvakarma
{"title":"Experimental investigations on displaced two layer electromagnetically coupled microstrip antenna","authors":"P. Vasistha, B. R. Vishvakarma","doi":"10.1109/ANTEM.1998.7861791","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861791","url":null,"abstract":"Experimental investigations conducted on displaced two layer microstrip antenna reveals that the − 10dB returnloss band of microstrip antenna can be broadened by using a suitable displacement between patches. EMCA attains the maximum band of 275 MHz for d = 0.1833λ, which is 14.6% higher as compared to perfectly aligned patches.","PeriodicalId":334204,"journal":{"name":"1998 Symposium on Antenna Technology and Applied Electromagnetics","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":"128474625","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 diversity channel model using multiple tapped-delay lines characterized by lag-delay correlations 一种采用多抽头延迟线的分集信道模型，其特征为滞后-延迟相关
1998 Symposium on Antenna Technology and Applied Electromagnetics Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861761
S. Roy, D. Falconer
{"title":"A diversity channel model using multiple tapped-delay lines characterized by lag-delay correlations","authors":"S. Roy, D. Falconer","doi":"10.1109/ANTEM.1998.7861761","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861761","url":null,"abstract":"A channel model is proposed for the purpose of Monte-Carlo simulation of the frequency-selective (wideband) vector channel between a subscriber and an array-enhanced base station. The model is defined in the baseband equivalent, discrete-time domain and can therefore be represented as multiple tapped-delay lines (one per diversity branch). It is based on the wide-sense stationary, uncorrelated scattering (WSSUS) assumption and includes not only the radio channel itself but also the transmitting and receiving fixed filters. Each tap coefficient corresponds to a complex gaussian variate which is correlated with other taps at different branches and different delays. The ensemble of tap coefficients constitutes a complex multivariate gaussian process whose statistics can be entirely defined with an analytically-derived lag-delay correlation function (where the term lag denotes spatial separation between two elements).","PeriodicalId":334204,"journal":{"name":"1998 Symposium on Antenna Technology and Applied Electromagnetics","volume":"76 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":"131904545","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
Complex permittivity evaluation for poly(vinyl alcohol) and poly(methyl methacrilate) at microwave frequencies by a TDR method 用TDR法测定微波频率下聚乙烯醇和聚甲基丙烯酸甲酯的复介电常数
1998 Symposium on Antenna Technology and Applied Electromagnetics Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861764
Sandu D. Dumitru, Gasner Paul, R. Octavian, S. Gabriel
{"title":"Complex permittivity evaluation for poly(vinyl alcohol) and poly(methyl methacrilate) at microwave frequencies by a TDR method","authors":"Sandu D. Dumitru, Gasner Paul, R. Octavian, S. Gabriel","doi":"10.1109/ANTEM.1998.7861764","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861764","url":null,"abstract":"The Time Domain Reflectometry (TDR) is a convenient microwave technique to perform real-time measurements. In our laboratory this technique was used to measure the relative complex permittivity of two usual polymers: Poly(vinyl alcohol) (PVA) and Poly(methyl methacrilate) (PMMA).","PeriodicalId":334204,"journal":{"name":"1998 Symposium on Antenna Technology and Applied Electromagnetics","volume":"26 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":"133386950","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
Photo-conducting chip-antenna for wireless applications 用于无线应用的光导芯片天线
1998 Symposium on Antenna Technology and Applied Electromagnetics Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861797
S. Yarasi, T. Manku
{"title":"Photo-conducting chip-antenna for wireless applications","authors":"S. Yarasi, T. Manku","doi":"10.1109/ANTEM.1998.7861797","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861797","url":null,"abstract":"The importance of micro-crystalline silicon and n+ amorphous silicon thin films for the photo-conducting dipole antenna application is investigated in this paper. Photo-conducting dipole antennas have been fabricated and tested. These antennas are capable of detecting pico-second pulses and radiate electrical pulses which have a frequency spectra that extends to greater than 430GHz.","PeriodicalId":334204,"journal":{"name":"1998 Symposium on Antenna Technology and Applied Electromagnetics","volume":"43 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":"115526002","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 circularly polarized double-loop antenna radiating a tilted beam 一种向倾斜波束辐射的圆极化双环天线
1998 Symposium on Antenna Technology and Applied Electromagnetics Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861717
K. Hirose, S. Shimizu, H. Nakano
{"title":"A circularly polarized double-loop antenna radiating a tilted beam","authors":"K. Hirose, S. Shimizu, H. Nakano","doi":"10.1109/ANTEM.1998.7861717","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861717","url":null,"abstract":"A loop antenna can radiate a circularly polarized (CP) wave, when perturbation segments are added to the loop [1]-[3]. The radiation characteristics of the loop antenna have been investigated for the first-[1],[2] and higher-order [3] operation modes. It has been found that the loop antenna radiates a CP axial beam for the first mode, and CP conical beams for the higher modes.","PeriodicalId":334204,"journal":{"name":"1998 Symposium on Antenna Technology and Applied Electromagnetics","volume":"6 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":"123705105","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
Modeling high-speed optoelectronic components using the method of lines 高速光电元件的线形建模方法
1998 Symposium on Antenna Technology and Applied Electromagnetics Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861670
P. Berini
{"title":"Modeling high-speed optoelectronic components using the method of lines","authors":"P. Berini","doi":"10.1109/ANTEM.1998.7861670","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861670","url":null,"abstract":"This paper discusses the application of the Method of Lines (MoL) to electromagnetic modeling problems encountered in high-speed optoelectronics. The optical performance of a novel traveling-wave photodetector is characterized and the level of interaction between an optical mode propagating in the photodetector and the overlying metal electrode is assessed. Losses are taken into account and complete modal analysis results are given for the main horizontally polarized optical mode supported by the device.","PeriodicalId":334204,"journal":{"name":"1998 Symposium on Antenna Technology and Applied Electromagnetics","volume":"9 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":"131106220","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
Propagation simulation for the prediction of LMCS/LMDS coverage LMCS/LMDS覆盖预测的传播仿真
1998 Symposium on Antenna Technology and Applied Electromagnetics Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861693
J. DeCruyenaere, D. Falconer
{"title":"Propagation simulation for the prediction of LMCS/LMDS coverage","authors":"J. DeCruyenaere, D. Falconer","doi":"10.1109/ANTEM.1998.7861693","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861693","url":null,"abstract":"Work in progress on a propagation simulator is described. This simulator is being written for the purpose of predicting coverage for LMCS/LMDS systems in suburban environments. Preliminary coverage predictions are given based on a randomly generated environment database. These predictions suggest the relative importance of various factors in determining coverage, including the use of specular reflections, the effect of rain, and the effect of system design choices such as power margin, the use of cell overlap and on-channel repeaters. The ongoing verification of the simulator using experimental power measurements is summarized, as well as resulting changes made to the simulator to date.","PeriodicalId":334204,"journal":{"name":"1998 Symposium on Antenna Technology and Applied Electromagnetics","volume":"7 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":"129745661","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
Broadband stacked microstrip antenna arrays 宽带堆叠微带天线阵列
1998 Symposium on Antenna Technology and Applied Electromagnetics Pub Date : 1998-08-01 DOI: 10.1109/ANTEM.1998.7861758
C. Ravipati, D. Gray, L. Shafai
{"title":"Broadband stacked microstrip antenna arrays","authors":"C. Ravipati, D. Gray, L. Shafai","doi":"10.1109/ANTEM.1998.7861758","DOIUrl":"https://doi.org/10.1109/ANTEM.1998.7861758","url":null,"abstract":"It is well known that antenna arrays employing single layer microstrip patch radiating elements exhibit inherently narrow bandwidth. The aim of this paper is to investigate the impedance and gain bandwidth characteristics of microstrip antenna arrays with stacked parasitic elements. Two different 4 × 4 microstrip array configurations with stacked parasitic patches are studied both theoretically and experimentally at EHF range for LMCS application.","PeriodicalId":334204,"journal":{"name":"1998 Symposium on Antenna Technology and Applied Electromagnetics","volume":"192 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":"133574629","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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