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Multibeam offset parabolic reflector fed by interlaced feeds using an EBG resonator antenna 多波束偏置抛物面反射器，采用EBG谐振器天线隔行馈电
11th International Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2005] Pub Date : 2005-06-01 DOI: 10.1109/ANTEM.2005.7852050
R. Chantalat, T. Monediere, M. Thevenot, B. Jecko, P. Dumon
{"title":"Multibeam offset parabolic reflector fed by interlaced feeds using an EBG resonator antenna","authors":"R. Chantalat, T. Monediere, M. Thevenot, B. Jecko, P. Dumon","doi":"10.1109/ANTEM.2005.7852050","DOIUrl":"https://doi.org/10.1109/ANTEM.2005.7852050","url":null,"abstract":"A multibeam single parabolic reflector antenna with horns on the focal plane suffers from excessive losses either by spillover or by beam crossover. To avoid the complex, costly and heavy systems currently used to improve the multibeam antenna characteristics as multiple apertures design or enhanced feeds concept, a multifeed and multifrequency EBG antenna is appropriate to illuminate a multibeam single offset parabolic reflector. Indeed, the EBG resonator antenna can achieve directive and interlaced focal feeds in order to obtain maximum reflector antenna efficiency and closely spaced beams. This original property of interlaced radiating apertures is impossible to obtain with horns and is very convenient to improve the reflector antenna performances. A low losses EBG antenna has been realized at 8 GHz to illuminate a focusing antenna with 0.74 F/D ratio. Optimum reflector antenna efficiency of 0.8 and a beams crossover level equal to −3.5 dB have been obtained. The first results of another EBG system at 30 GHz which illuminates a reflector antenna with 2.7 F/D ratio are given.","PeriodicalId":360668,"journal":{"name":"11th International Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2005]","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130404599","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
Simulink implementation of a CDMA MIMO-beamforming system 一个CDMA mimo波束形成系统的Simulink实现
11th International Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2005] Pub Date : 2005-06-01 DOI: 10.1109/ANTEM.2005.7852089
M. Hefnawi, J. Gai
{"title":"Simulink implementation of a CDMA MIMO-beamforming system","authors":"M. Hefnawi, J. Gai","doi":"10.1109/ANTEM.2005.7852089","DOIUrl":"https://doi.org/10.1109/ANTEM.2005.7852089","url":null,"abstract":"This paper presents the Simulink implementation of a Multiple Input Multiple Output (MIMO) beamforming system based on the code filtering approach (CFA) and Alamouti's transmit diversity. This model can be used as a platform to test the use of DSPs/FPGs in new generation of MIMO-beamforming systems and will allow evaluating the Bit Error Rate (BER) and the beampattern performances. This goal is achieved through modeling and simulation using the rapid prototyping environment based on Mathworks Simulink. Simulation results show that the proposed hybrid beamforming CFA and space-time coding technologies significantly outperform MIMO systems without beamforming.","PeriodicalId":360668,"journal":{"name":"11th International Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2005]","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130618443","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
A novel fast method for accurate Modal analysis of the Microstrip Patch Antennas 一种快速精确分析微带贴片天线模态的新方法
11th International Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2005] Pub Date : 2005-06-01 DOI: 10.1109/ANTEM.2005.7852167
A. Sharif, M. Soleimani
{"title":"A novel fast method for accurate Modal analysis of the Microstrip Patch Antennas","authors":"A. Sharif, M. Soleimani","doi":"10.1109/ANTEM.2005.7852167","DOIUrl":"https://doi.org/10.1109/ANTEM.2005.7852167","url":null,"abstract":"Numerical Methods for analysis and design of Microstrip Patch Antennas (MPAs) are time-consuming and quality properties about the analyzed structures are not appropriately achieved using them.","PeriodicalId":360668,"journal":{"name":"11th International Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2005]","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121514913","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
Multilevel fast Physical Optics algorithm for reflector antennas 反射面天线的多电平快速物理光学算法
11th International Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2005] Pub Date : 2005-06-01 DOI: 10.1109/ANTEM.2005.7852115
C. Letrou, A. Boag
{"title":"Multilevel fast Physical Optics algorithm for reflector antennas","authors":"C. Letrou, A. Boag","doi":"10.1109/ANTEM.2005.7852115","DOIUrl":"https://doi.org/10.1109/ANTEM.2005.7852115","url":null,"abstract":"A multilevel fast physical optics (FPO) algorithm for computation of the radiation patterns of reflector antennas via hierarchical domain decomposition is presented. The multilevel computation essentially reduces to the aggregation of radiation patterns of increasingly larger sub-domains, starting with the direct evaluation of radiation characteristics of small radiating sub-domains and ending with the whole reflector. Numerical results demonstrate that even with a simple cubic interpolation the proposed FPO approach provides a large speedup without degrading the accuracy of the resulting radiation patterns.","PeriodicalId":360668,"journal":{"name":"11th International Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2005]","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132202200","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
On the accuracy of scattering measurements in free space: Random and systematic errors 自由空间散射测量的精度:随机误差和系统误差
11th International Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2005] Pub Date : 2005-06-01 DOI: 10.1109/ANTEM.2005.7852069
C. Eyraud, J. Geffrin, P. Sabouroux
{"title":"On the accuracy of scattering measurements in free space: Random and systematic errors","authors":"C. Eyraud, J. Geffrin, P. Sabouroux","doi":"10.1109/ANTEM.2005.7852069","DOIUrl":"https://doi.org/10.1109/ANTEM.2005.7852069","url":null,"abstract":"The possibilities of 2D and 3D target scattering measurements have already been validated in the anechoic chamber of the C.C.R.M. The current purpose is to increase the complexity of the studied objects, which requires an improvement of the measurement accuracy.","PeriodicalId":360668,"journal":{"name":"11th International Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2005]","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115720449","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
Applications of coaxial-slot antenna for interstitial and intracavitary microwave hyperthermia 同轴缝隙天线在腔间和腔内微波热疗中的应用
11th International Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2005] Pub Date : 2005-06-01 DOI: 10.1109/ANTEM.2005.7852093
K. Ito, K. Saito, Masaharu Takahashi, A. Hiroe
{"title":"Applications of coaxial-slot antenna for interstitial and intracavitary microwave hyperthermia","authors":"K. Ito, K. Saito, Masaharu Takahashi, A. Hiroe","doi":"10.1109/ANTEM.2005.7852093","DOIUrl":"https://doi.org/10.1109/ANTEM.2005.7852093","url":null,"abstract":"This paper describes the applications of the coaxial-slot antenna to the interstitial and intracavitary microwave hyperthermia. First, we confirmed the effectiveness of the treatment by use of our developed antenna. Next, the investigation of the heating performances of the coaxial-slot antenna for treatment of bile duct carcinoma was shown and the possibility of the treatment was described. As a further study, we will have much more cases of actual treatments by the interstitial microwave hyperthermia and will study the antennas for intracavitary heating aiming at practical use.","PeriodicalId":360668,"journal":{"name":"11th International Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2005]","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114808282","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
Multilayer antenna array in Q band for spatial communications 用于空间通信的Q波段多层天线阵列
11th International Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2005] Pub Date : 2005-06-01 DOI: 10.1109/ANTEM.2005.7852107
O. Lafond, M. Himdi, Y. Cailloce, O. Vendier
{"title":"Multilayer antenna array in Q band for spatial communications","authors":"O. Lafond, M. Himdi, Y. Cailloce, O. Vendier","doi":"10.1109/ANTEM.2005.7852107","DOIUrl":"https://doi.org/10.1109/ANTEM.2005.7852107","url":null,"abstract":"This paper deals with a multilayer printed antenna array. This study takes place in European MIPA project [1] concerning an antenna prototype which is apart of Q band (50 GHz) one-feed-per-beam antenna reflector. In millimetre waves, it is highly required to separate active layer (MEMS, MMIC, ‥) and radiating elements to avoid electrical spurious generated by coupling radiation. This separation is done with a very thick metallic support (2 mm). Moreover, this thick ground plane is important for thermal dissipation aspect. In this aim, the authors present an original feed of antenna array via a H shape thick slot transition. Results of antenna array radiating patterns, power gain and efficiency are given in the considering bandwidth (47.2 to 50.2 GHz).","PeriodicalId":360668,"journal":{"name":"11th International Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2005]","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123453442","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 metrics for UWB antennas 超宽带天线的性能指标
11th International Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2005] Pub Date : 2005-06-01 DOI: 10.1109/ANTEM.2005.7852148
P. Rogers, G. Hilton, I. Craddock
{"title":"Performance metrics for UWB antennas","authors":"P. Rogers, G. Hilton, I. Craddock","doi":"10.1109/ANTEM.2005.7852148","DOIUrl":"https://doi.org/10.1109/ANTEM.2005.7852148","url":null,"abstract":"With the desire for ever-increasing data-rates, coupled with the interest in techniques that offer interference mitigation, much research has focused upon Ultra Wide-Band (UWB) systems that can theoretically realise such benefits. In practice, any UWB system will require an antenna to connect it (the radio) to free-space. Through examples of practical measurements from two different UWB antennas, this paper will discuss the characteristics that must be considered when assessing UWB antennas.","PeriodicalId":360668,"journal":{"name":"11th International Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2005]","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122081249","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 new equivalent junction model for characterizing power absorption by lossy scatterers in reactive field regions 一种新的等效结模型，用于表征有耗散射体在反应场区域的功率吸收
11th International Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2005] Pub Date : 2005-06-01 DOI: 10.1109/ANTEM.2005.7852059
B. Derat, J. Bolomey
{"title":"A new equivalent junction model for characterizing power absorption by lossy scatterers in reactive field regions","authors":"B. Derat, J. Bolomey","doi":"10.1109/ANTEM.2005.7852059","DOIUrl":"https://doi.org/10.1109/ANTEM.2005.7852059","url":null,"abstract":"This paper provides a new method to characterize power absorption mechanisms in reactive field regions. According to the proposed approach, the energy dissipated in any lossy scatterer exposed to any radiating source is described in terms of power transfer from a set of equivalent generators to a microwave junction. By introducing the concepts of available power and load factor in electromagnetic fields, this general and analytical model allows a better understanding of near-field energy deposition phenomena and identification of the most impacting parameters. In order to illustrate the relevance of this technique, the equivalent junction model is applied to the full analysis of power absorption in a lossy cylinder close to a current line source.","PeriodicalId":360668,"journal":{"name":"11th International Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2005]","volume":"100 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130139266","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
Improving the numerical effectiveness of a class of microwave imaging techniques for NDE/NDT with the SMW updating formula 利用SMW更新公式提高一类无损检测/无损检测微波成像技术的数值有效性
11th International Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2005] Pub Date : 2005-06-01 DOI: 10.1109/ANTEM.2005.7852035
M. Benedetti, D. Franceschini, G. Franceschini, A. Massa, M. Pastorino, A. Rosani
{"title":"Improving the numerical effectiveness of a class of microwave imaging techniques for NDE/NDT with the SMW updating formula","authors":"M. Benedetti, D. Franceschini, G. Franceschini, A. Massa, M. Pastorino, A. Rosani","doi":"10.1109/ANTEM.2005.7852035","DOIUrl":"https://doi.org/10.1109/ANTEM.2005.7852035","url":null,"abstract":"This paper presents an innovative microwave imaging technique suitable for NDT/NDE applications. To reduce the number of problem unknowns as well a the computational load by improving the convergence rate of the process, the available a-priori information is exploited by introducing a computationally-effective procedure for the prediction of the electric field based on the updating Sherman-Morrison-Woodbury (SMW) formula. The numerical results as well as comparisons with state-of-the-art methods confirm the effectiveness, the feasibility, and the robustness of the proposed approach.","PeriodicalId":360668,"journal":{"name":"11th International Symposium on Antenna Technology and Applied Electromagnetics [ANTEM 2005]","volume":"72 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128023107","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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