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2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC)最新文献

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Synthesis and characterization of Ni-Mo sintered alloy foils for microwave tube manufacturing 微波管用镍钼烧结合金箔的合成与表征
2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC) Pub Date : 2013-10-28 DOI: 10.1109/IMOC.2013.6646471
F. F. Sene, V. O. Santos, C. Motta
{"title":"Synthesis and characterization of Ni-Mo sintered alloy foils for microwave tube manufacturing","authors":"F. F. Sene, V. O. Santos, C. Motta","doi":"10.1109/IMOC.2013.6646471","DOIUrl":"https://doi.org/10.1109/IMOC.2013.6646471","url":null,"abstract":"The Ni-Mo composite alloy, to be used in microwave vacuum tube manufacturing, was prepared from metal powders previously homogenized, pressed and sintered at 1200°C by induction heating. The Ni-Mo sintered discs were annealed at 1150°C for 20min, and submitted to the roller process in 5 cycles to obtain a thin foil with 0.10 mm of thickness, for brazing process adopted to join the cathode components. The samples were submitted to scanning electron microscopy (SEM) coupled to energy dispersive spectroscopy analysis (EDS) to characterize the composition and microstructure. X-ray diffraction (XRD) was performed to determine the crystalline structure and energy dispersive X-ray fluorescence spectroscopy (EDX) was performed to determine the chemical composition and the homogeneity of the composite alloy.","PeriodicalId":395359,"journal":{"name":"2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115786172","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
Impedance measurement of dipole antenna for EPC Global compliant RFID tag EPC全球兼容RFID标签偶极天线阻抗测量
2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC) Pub Date : 2013-10-28 DOI: 10.1109/IMOC.2013.6646483
F. C. da Costa, E. R. De Lima, R. T. Yoshioka, J. Bertuzzo, J. Koeppe
{"title":"Impedance measurement of dipole antenna for EPC Global compliant RFID tag","authors":"F. C. da Costa, E. R. De Lima, R. T. Yoshioka, J. Bertuzzo, J. Koeppe","doi":"10.1109/IMOC.2013.6646483","DOIUrl":"https://doi.org/10.1109/IMOC.2013.6646483","url":null,"abstract":"This paper presents the design, measurement methodology and results of a dipole antenna for a RFID tag compliant to EPC Global Gen2. The impedance of the proposed antenna is match at 915 MHz. The meander-line tag antenna dimensions were optimized and evaluated using the software CST Microwave Studio. S parameters of the fabricated antenna were measured using a two-port VNA. The impedance was computed and comparisons with the simulated values were done. It was observed that erroneous material specifications can cause a significant variation in the impedance results.","PeriodicalId":395359,"journal":{"name":"2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC)","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132535279","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: 8
New improved version of J1…J4 interferometry method and its application to nanometric vibration measurements J1. J4干涉测量方法的新改进及其在纳米振动测量中的应用
2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC) Pub Date : 2013-10-28 DOI: 10.1109/IMOC.2013.6646489
Fernando da Cruz Pereira, Jose Henrique Galeti, Ricardo Tokio Higuti, C. Kitano, E. C. Nelli Silva
{"title":"New improved version of J1…J4 interferometry method and its application to nanometric vibration measurements","authors":"Fernando da Cruz Pereira, Jose Henrique Galeti, Ricardo Tokio Higuti, C. Kitano, E. C. Nelli Silva","doi":"10.1109/IMOC.2013.6646489","DOIUrl":"https://doi.org/10.1109/IMOC.2013.6646489","url":null,"abstract":"Piezoelectric ceramics, such as PZT, can generate subnanometric displacements, but in order to generate multi-micrometric displacements, they should be either driven by high electric voltages (hundreds of volts), or operate at a mechanical resonant frequency (in narrow band), or have large dimensions (tens of centimeters). A piezoelectric flextensional actuator (PFA) is a device with small dimensions that can be driven by reduced voltages and can operate in the nano- and micro scales. Interferometric techniques are very adequate for the characterization of these devices, because there is no mechanical contact in the measurement process, and it has high sensitivity, bandwidth and dynamic range. A low cost open-loop homodyne Michelson interferometer is utilized in this work to experimentally detect the nanovibrations of PFAs, based on the spectral analysis of the interferometric signal. By employing the well known J1...J4 phase demodulation method, a new and improved version is proposed, which presents the following characteristics: is direct, self-consistent, is immune to fading, and does not present phase ambiguity problems. The proposed method has resolution that is similar to the modified J1...J4 method (0.18 rad); however, differently from the former, its dynamic range is 20% larger, does not demand Bessel functions algebraic sign correction algorithms and there are no singularities when the static phase shift between the interferometer arms is equal to an integer multiple of π/2 rad. Electronic noise and random phase drifts due to ambient perturbations are taken into account in the analysis of the method. The PFA nanopositioner characterization was based on the analysis of linearity between the applied voltage and the resulting displacement, on the displacement frequency response and determination of main resonance frequencies.","PeriodicalId":395359,"journal":{"name":"2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130975007","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
T-slot PIFA with excitation of the ground plane resonant modes and considerations of the interaction between antenna, mobile handset and user's head 具有地平面谐振模式激励并考虑天线、手机和用户头部相互作用的t槽PIFA
2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC) Pub Date : 2013-10-28 DOI: 10.1109/IMOC.2013.6646476
J. T. Garzon, A. de Salles, A. Pedra, S. Severo
{"title":"T-slot PIFA with excitation of the ground plane resonant modes and considerations of the interaction between antenna, mobile handset and user's head","authors":"J. T. Garzon, A. de Salles, A. Pedra, S. Severo","doi":"10.1109/IMOC.2013.6646476","DOIUrl":"https://doi.org/10.1109/IMOC.2013.6646476","url":null,"abstract":"This paper presents a T-slot planar inverted F antenna (PIFA) for wireless mobile communications GSM/UMTS/WCDMA systems. A modified ground plane is used to increase the bandwidth. A prototype is implemented and the differences in performance of the antenna with and without the presence of the mobile handset and the user's head are estimated. The simulations are performed using the finite difference time domain (FDTD) method.","PeriodicalId":395359,"journal":{"name":"2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128194800","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: 8
A different approach to a highly efficient wireless energy harvesting device for low-power application 低功耗应用的高效无线能量收集装置的不同方法
2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC) Pub Date : 2013-10-28 DOI: 10.1109/IMOC.2013.6646556
B. Franciscatto, Vitor Freitas, J. Duchamp, C. Defay, T. Vuong
{"title":"A different approach to a highly efficient wireless energy harvesting device for low-power application","authors":"B. Franciscatto, Vitor Freitas, J. Duchamp, C. Defay, T. Vuong","doi":"10.1109/IMOC.2013.6646556","DOIUrl":"https://doi.org/10.1109/IMOC.2013.6646556","url":null,"abstract":"This paper presents a different approach for a highly efficient Wireless Energy Harvesting (WEH) device design at 2.45 GHz for low-power density (μW/cm2) applications. Therefore, the high-efficiency rectifier was designed, in order to evaluate its harvesting performances; the rectifier was connected to a classical antenna and the energy harvesting characterization was performed. A correct model of a Schottky diode is necessary despite the nonlinear behavior. To increase the conversion efficiency an electromagnetic resonant phenomenon is proposed. To validate this method, we developed a rectifier circuit capable of recovering signals at 2.45 GHz with a high RF-DC efficiency conversion. For a low-power density of 1.3 μW/cm2, the rectifier presents a maximum conversion efficiency of 70% and when connected to an antenna of 43%.","PeriodicalId":395359,"journal":{"name":"2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC)","volume":"104 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114531342","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
Clear air attenuation on FSO links 清除FSO链路上的空气衰减
2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC) Pub Date : 2013-10-28 DOI: 10.1109/IMOC.2013.6646590
O. Fiser, V. Brazda
{"title":"Clear air attenuation on FSO links","authors":"O. Fiser, V. Brazda","doi":"10.1109/IMOC.2013.6646590","DOIUrl":"https://doi.org/10.1109/IMOC.2013.6646590","url":null,"abstract":"The FSO link attenuation can be caused not only by fog, rain and atmospheric turbulences but also by water vapor (clear air attenuation). The measure of water vapor can be also the sonic temperature. This contribution compares computed sonic temperature from relative humidity, temperature and air pressure with sonic temperature observed by sonic anemometer. We found that the sonic temperature (measured by anemometers) can be replaced by computed sonic temperature being more available in practice. Finally we introduced the Sonic Reduction Factor (SRF) defined as ratio of FSO attenuation computed from sonic temperature to attenuation estimated from meteorological temperature. It could be used to correct the clear air attenuation computed from meteorological temperature instead of sonic temperature.","PeriodicalId":395359,"journal":{"name":"2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114892797","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
The use of metamaterial technology to improve a GTEM chamber 利用超材料技术对瞬变电磁炉进行了改进
2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC) Pub Date : 2013-10-28 DOI: 10.1109/IMOC.2013.6646506
H. X. de Araujo, S. Barbin, L. Kretly
{"title":"The use of metamaterial technology to improve a GTEM chamber","authors":"H. X. de Araujo, S. Barbin, L. Kretly","doi":"10.1109/IMOC.2013.6646506","DOIUrl":"https://doi.org/10.1109/IMOC.2013.6646506","url":null,"abstract":"In this work, metamaterial patterns are applied to a GTEM - Gigahertz Transverse Electromagnetic Chamber to improve and give flexibility to its frequency response. The main goal is to achieve a better frequency resonance regardless the dimensions of the original chamber. Therefore, a comparison between the CLL - Capacitively Loaded Loop and Fractal metamaterial technology for these purposes, is done. Experimental results are compared to the simulated ones.","PeriodicalId":395359,"journal":{"name":"2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121611722","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
Wireless power transmission and reception system using UWB CPW-Fed Microstrip antenna 无线电力传输与接收系统采用超宽带CPW-Fed微带天线
2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC) Pub Date : 2013-10-28 DOI: 10.1109/IMOC.2013.6646559
W. C. Soares, S. Gonçalves, U. C. Resende
{"title":"Wireless power transmission and reception system using UWB CPW-Fed Microstrip antenna","authors":"W. C. Soares, S. Gonçalves, U. C. Resende","doi":"10.1109/IMOC.2013.6646559","DOIUrl":"https://doi.org/10.1109/IMOC.2013.6646559","url":null,"abstract":"This brief describes a wireless power transmission and reception system using UWB CPW-Fed Microstrip antennas and discrete components. A square wave oscillator is used as an excitation source to a Gaussian pulse generator. This pulse is then shaped and differentiated by an RC for posterior transmission. The pulse is transmitted with a 50-cm greater distance with an 8 ns width and is semi-rectified in the reception and applied in a resistance.","PeriodicalId":395359,"journal":{"name":"2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129423962","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
Performance of transparent optical networks with multiple bandwidth channels 多带宽通道透明光网络的性能研究
2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC) Pub Date : 2013-10-28 DOI: 10.1109/IMOC.2013.6646507
Paulo Cesar Barreto da Silva, M. Abbade, L. H. Bonani
{"title":"Performance of transparent optical networks with multiple bandwidth channels","authors":"Paulo Cesar Barreto da Silva, M. Abbade, L. H. Bonani","doi":"10.1109/IMOC.2013.6646507","DOIUrl":"https://doi.org/10.1109/IMOC.2013.6646507","url":null,"abstract":"This work presents an analysis of the performance of different routing and wavelength assignment (RWA) and routing and spectrum assignment (RSA) algorithms applied to transparent optical networks supporting channels with multiple bandwidths. Two cases are considered. The first one regards an elastic grid. The second concerns a situation where optical spectrum is divided in blocks that are individually assigned to channels with different bandwidths. A new RSA based on the search for the shortest path with maximum number of free frequency slot units (SPMFF) is proposed. Investigation encompasses three scenarios characterized by different channel connection probabilities. Computer simulation results indicate that first-fit algorithm provides minimum blocking probability for low traffic loads, but is outperformed by SPMFF at higher loads. It is also verified that SPMFF allows the highest network bandwidth occupation, which is of 54% for a blocking probability of 10%.","PeriodicalId":395359,"journal":{"name":"2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC)","volume":"480 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124497455","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
Power consumption optimization in multi-granular optical networks with particle swarm intelligence 基于粒子群智能的多颗粒光网络功耗优化
2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC) Pub Date : 2013-10-28 DOI: 10.1109/IMOC.2013.6646432
Tales Nonato, Fabio Renan Durand, M. Abbade, T. Abrão
{"title":"Power consumption optimization in multi-granular optical networks with particle swarm intelligence","authors":"Tales Nonato, Fabio Renan Durand, M. Abbade, T. Abrão","doi":"10.1109/IMOC.2013.6646432","DOIUrl":"https://doi.org/10.1109/IMOC.2013.6646432","url":null,"abstract":"In this paper, a power consumption optimization in multi-granular optical network based on particle swarm intelligence is described. The particle swarm optimization (PSO) algorithm is evocated in order to solve the signal-to-noise plus interference ratio (SNIR) optimization to regulate the transmitted power in order to minimize the power consumption. The main results have showed, even with only 10%-20% of the total PSO convergence, the network is able to operate within a approximately saving of 10% of consumed power compared to network operation without power optimization policy. The utilization of bypass technique with PSO results in saving approximately 35% of the consumed power and should be strategically utilized in optical networks.","PeriodicalId":395359,"journal":{"name":"2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121225572","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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