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Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678)最新文献

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Evaluation of the level of stress in rats of the species Rattus norvegicus submitted to microwave radiation 微波辐射对褐家鼠应激水平的影响
Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678) Pub Date : 2003-11-17 DOI: 10.1109/IMOC.2003.1244880
A.K.R. Lopes, A. Rogério, D. Dantas, M. Carvalho, M.S. de Alencar, S. Nain
{"title":"Evaluation of the level of stress in rats of the species Rattus norvegicus submitted to microwave radiation","authors":"A.K.R. Lopes, A. Rogério, D. Dantas, M. Carvalho, M.S. de Alencar, S. Nain","doi":"10.1109/IMOC.2003.1244880","DOIUrl":"https://doi.org/10.1109/IMOC.2003.1244880","url":null,"abstract":"This paper presents a preliminary analysis of the behavioral effects verified in rats of the species Rattus norvegicus, submitted to microwave radiation. The analysis, based on the elevated cross form maze experiment, had as main objective to verify the stress level in adult and young rats that suffered the influence of non-ionizing radiation (Experimental Group) and to compare the answer ratio (number of entrances in the open arms/total number of entrances in the arms) with the Control Group, exempt of the influence of the radiation. Throughout the tests, a microwave generator was used operating in the frequency of 2.45 GHz during a daily period of one hour. The results obtained with the experiment showed that, for the older rats, no significant variation in the anxiety and stress levels was observed between the Experimental and Control Groups. On the other hand, for the younger rats there was a considerable increase of those levels in the Experimental Group in relation to the Control Group.","PeriodicalId":156662,"journal":{"name":"Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132590979","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
Imaginary refractive index waveguides and applications 虚折射率波导及其应用
Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678) Pub Date : 2003-11-17 DOI: 10.1109/IMOC.2003.1244901
W. Padden, J. Canning, L. Poladian, N. Issa
{"title":"Imaginary refractive index waveguides and applications","authors":"W. Padden, J. Canning, L. Poladian, N. Issa","doi":"10.1109/IMOC.2003.1244901","DOIUrl":"https://doi.org/10.1109/IMOC.2003.1244901","url":null,"abstract":"A new form of optical waveguide, the gain/loss waveguide (GLW), is proposed and demonstrated through numerical simulation. Both step- and photonic crystal gain/loss fibres with no variation in the real part of the refractive index are shown to be feasible. The implications in designing novel waveguides and devices are discussed.","PeriodicalId":156662,"journal":{"name":"Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129895496","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
Improved radiation efficiency measurement of mobile systems and application to a novel multiband antenna 改进的移动系统辐射效率测量及其在新型多波段天线中的应用
Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678) Pub Date : 2003-11-17 DOI: 10.1109/IMOC.2003.1244889
D. Heberling, M. Geissler, O. Litschke, M. Martínez-Vázquez
{"title":"Improved radiation efficiency measurement of mobile systems and application to a novel multiband antenna","authors":"D. Heberling, M. Geissler, O. Litschke, M. Martínez-Vázquez","doi":"10.1109/IMOC.2003.1244889","DOIUrl":"https://doi.org/10.1109/IMOC.2003.1244889","url":null,"abstract":"In this paper an improved method for measuring the radiation efficiency of small devices is introduced. The method is based on Wheeler's principle of measuring the antenna impedance within two controlled environments: free space and a closed metallic box. An extended equivalent circuit is introduced, that gives an exact description of the behavior of the small device within the metallic box. This model is the basis for the determination of the radiation efficiency, independent of the size of the box and the location of the device within the box. In the next part of the paper, a concept for an integrated up-to-date multiband antenna for a GSM mobile phone is presented. The characterization of the radiation efficiency by the above mentioned method proves the new way to characterize the efficiency.","PeriodicalId":156662,"journal":{"name":"Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678)","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132352124","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
The real frequency technique applied to narrow-band MMIC multi-stage optical modulator drivers 实频技术应用于窄带MMIC多级光调制器驱动
Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678) Pub Date : 2003-11-17 DOI: 10.1109/IMOC.2003.1244848
L. Courcelle, E. Kerhervé, P. Jarry
{"title":"The real frequency technique applied to narrow-band MMIC multi-stage optical modulator drivers","authors":"L. Courcelle, E. Kerhervé, P. Jarry","doi":"10.1109/IMOC.2003.1244848","DOIUrl":"https://doi.org/10.1109/IMOC.2003.1244848","url":null,"abstract":"For the recent OSSB (optical single side band) systems, modulator drivers need only a narrow bandwidth (2 GHz bandwidth at 40 GHz) to convert electric signals into optical ones. Indeed, one of the most simple ways to eliminate the periodic fading due to chromatic dispersion is to use an optical single side band signal. In accordance with this principle, this paper presents two highly linear multistage MMIC amplifiers. For the design of the matching networks, the real-frequency technique has been successfully applied to 26.5-29.5 GHz and 40.5-42.5 GHz amplifiers.","PeriodicalId":156662,"journal":{"name":"Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115635217","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
Extended device-line method for determination of optimum operation point of microwave oscillators 确定微波振荡器最佳工作点的扩展装置线法
Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678) Pub Date : 2003-11-17 DOI: 10.1109/IMOC.2003.1244847
L. Brito, P. D. de Carvalho, L. Bermudez
{"title":"Extended device-line method for determination of optimum operation point of microwave oscillators","authors":"L. Brito, P. D. de Carvalho, L. Bermudez","doi":"10.1109/IMOC.2003.1244847","DOIUrl":"https://doi.org/10.1109/IMOC.2003.1244847","url":null,"abstract":"In this paper, an efficient approach to the performance prediction of microwave oscillators derived from the device-line measurement technique is described. Analyses are carried out by harmonic balance simulations. The proposed method differs from the conventional device-line measurement by allowing the representation of harmonic frequency loads besides the fundamental frequency one. This feature can increase performance measurements, such as output power and DC to RF conversion efficiency.","PeriodicalId":156662,"journal":{"name":"Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123858285","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
5-6 GHz low-noise active antenna array for multi-dimensional channel-sounding 用于多维信道探测的5- 6ghz低噪声有源天线阵列
Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678) Pub Date : 2003-11-17 DOI: 10.1109/IMOC.2003.1244874
T. Brauner, R. Kung, R. Vogt, W. Bachtold
{"title":"5-6 GHz low-noise active antenna array for multi-dimensional channel-sounding","authors":"T. Brauner, R. Kung, R. Vogt, W. Bachtold","doi":"10.1109/IMOC.2003.1244874","DOIUrl":"https://doi.org/10.1109/IMOC.2003.1244874","url":null,"abstract":"The design and measurement of a 5-6 GHz active receiving antenna array is presented. To obtain a compact and robust design, active downconverters are monolithically integrated using a standard 0.6 /spl mu/m-MESFET process and combined with planar linearly polarized aperture-coupled patch antennas. A very low noise figure of 3.5 dB and a total conversion gain of 30 dB is achieved. The use of dedicated monolithically integrated components leads to very low gain and phase variations. This active array will be used in a multi dimensional channel sounder.","PeriodicalId":156662,"journal":{"name":"Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678)","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124067051","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: 10
Inverse scattering of a lossy dielectric object by the genetic algorithm 用遗传算法求解有耗介质物体的逆散射
Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678) Pub Date : 2003-11-17 DOI: 10.1109/IMOC.2003.1244905
Yi-Da Wu, C. Chiu
{"title":"Inverse scattering of a lossy dielectric object by the genetic algorithm","authors":"Yi-Da Wu, C. Chiu","doi":"10.1109/IMOC.2003.1244905","DOIUrl":"https://doi.org/10.1109/IMOC.2003.1244905","url":null,"abstract":"In this paper, an efficient optimization algorithm for solving the inverse problem of a two-dimensional homogeneous lossy dielectric object is investigated. A homogeneous lossy dielectric cylinder of unknown permittivity scatters the incident wave in free space and the scattered fields are recorded. Based on the boundary condition and the incident field, a set of nonlinear surface integral equations is derived. The imaging problem is reformulated into an optimization problem and the genetic algorithm is employed to reconstruct the shape and the dielectric constant of the object. Numerical results show that the permittivity of the cylinders can be successfully reconstructed even when the permittivity is fairly large. The effect of random noise on imaging reconstruction is also investigated.","PeriodicalId":156662,"journal":{"name":"Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116607694","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
Thulium doped fiber amplifier performance in S band using two different complementary pumping wavelengths 两种不同互补泵浦波长的S波段掺铥光纤放大器性能
Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678) Pub Date : 2003-11-17 DOI: 10.1109/IMOC.2003.1244864
J. D. de Oliveira, J. Rosolem, A. Juriollo
{"title":"Thulium doped fiber amplifier performance in S band using two different complementary pumping wavelengths","authors":"J. D. de Oliveira, J. Rosolem, A. Juriollo","doi":"10.1109/IMOC.2003.1244864","DOIUrl":"https://doi.org/10.1109/IMOC.2003.1244864","url":null,"abstract":"We have characterized a thulium doped fiber amplifier using three simultaneous different pumping wavelengths. We obtained more than 30 dB peak gain in the S band region.","PeriodicalId":156662,"journal":{"name":"Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678)","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123357174","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: 6
Influence of a transmission line transformer in the performance of optical systems 输电线路变压器对光学系统性能的影响
Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678) Pub Date : 2003-11-17 DOI: 10.1109/IMOC.2003.1244896
L.S. Demenicis, L. Conrado, D. L. A. Seixas, W. Margulis, M. Carvalho
{"title":"Influence of a transmission line transformer in the performance of optical systems","authors":"L.S. Demenicis, L. Conrado, D. L. A. Seixas, W. Margulis, M. Carvalho","doi":"10.1109/IMOC.2003.1244896","DOIUrl":"https://doi.org/10.1109/IMOC.2003.1244896","url":null,"abstract":"The influence of a transmission line transformer in the performance of optical systems is theoretically investigated. After many eye-diagram simulations at 2.5 Gbit/s and 10 Gbit/s repetition rates, it has been concluded that the use of the transmission line transformer to match the impedance of the laser yields a high improvement in the system performance of the system. The cut-off frequency of the TLT was varied and it can be observed that there is an optimum value which maximizes the bit error rate (BER) of the system.","PeriodicalId":156662,"journal":{"name":"Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125551804","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
Optical characterization of active waveguides produced in lithium fluoride by He/sup +/ implantation He/sup +/注入氟化锂有源波导的光学特性
Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678) Pub Date : 2003-11-17 DOI: 10.1109/IMOC.2003.1244902
R. Montereali, Paul Moretti, Valentina Mussi, Jacques Mugnier, E. Nichelatti, Fabrizia, Somma, Bernard Jacquier
{"title":"Optical characterization of active waveguides produced in lithium fluoride by He/sup +/ implantation","authors":"R. Montereali, Paul Moretti, Valentina Mussi, Jacques Mugnier, E. Nichelatti, Fabrizia, Somma, Bernard Jacquier","doi":"10.1109/IMOC.2003.1244902","DOIUrl":"https://doi.org/10.1109/IMOC.2003.1244902","url":null,"abstract":"Planar active waveguides, produced in lithium fluoride crystals by implantation with 2 MeV He/sup +/ ions at several doses, have been characterized by optical absorption, photoluminescence and m-lines spectroscopy. All the colored samples support several modes, whose analysis allows reconstruction of the depth refractive index profiles of the waveguides as a function of dose. Two competitive physical mechanisms, associated with different processes of energy deposition along the ion track, are responsible for positive and negative modifications of the refractive index in the irradiated volume.","PeriodicalId":156662,"journal":{"name":"Proceedings of the 2003 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference - IMOC 2003. (Cat. No.03TH8678)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126111415","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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