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2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)最新文献

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An open source simulation tool for sharing and compatibility studies between 5G and other radiocommunication systems 一个开源仿真工具，用于5G和其他无线电通信系统之间的共享和兼容性研究
2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2017-08-01 DOI: 10.1109/IMOC.2017.8121171
E. Souza, A. Linhares, C. Queiroz, L. Valle, U. Dias, A. Barreto
{"title":"An open source simulation tool for sharing and compatibility studies between 5G and other radiocommunication systems","authors":"E. Souza, A. Linhares, C. Queiroz, L. Valle, U. Dias, A. Barreto","doi":"10.1109/IMOC.2017.8121171","DOIUrl":"https://doi.org/10.1109/IMOC.2017.8121171","url":null,"abstract":"This paper presents an open source simulation tool called SHARC. This software is designed to support sharing and compatibility studies between IMT systems (including 5G) and other radiocommunication systems according to the framework proposed by Recommendation ITU-R M.2101. In order to show some of the simulator capabilities, this paper also presents a preliminary sharing study between 5G systems and Fixed Satellite Service (FSS) that operate in the same frequency band.","PeriodicalId":171284,"journal":{"name":"2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"319 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114471598","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
Characterization of nonlinear carrier dynamics in silicon strip nanowaveguides 硅带状纳米波导中非线性载流子动力学的表征
2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2017-08-01 DOI: 10.1109/IMOC.2017.8121166
I. Aldaya, P. Dainese, A. Gil-Molina, J. Pita, H. Fragnito
{"title":"Characterization of nonlinear carrier dynamics in silicon strip nanowaveguides","authors":"I. Aldaya, P. Dainese, A. Gil-Molina, J. Pita, H. Fragnito","doi":"10.1109/IMOC.2017.8121166","DOIUrl":"https://doi.org/10.1109/IMOC.2017.8121166","url":null,"abstract":"Nonlinear carrier recombination dynamics is characterized in a 450 nm × 220 nm silicon nanowire by employing a time-resolved pump-and-probe experiment. Our results show that the recombination rate is faster at the early stages of the decay as compared to the final stages, in agreement with trap-assisted mechanism. We have also demonstrated that by operating at high carrier density, faster excess carrier generation and recombination can be obtained, which we have used to improve the speed of an all-optical FCA based silicon switch from about 7 to 1 ns.","PeriodicalId":171284,"journal":{"name":"2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116590066","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 on the deployment of FSS as electromagnetic shielding for 5G devices FSS作为5G设备电磁屏蔽的部署研究
2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2017-08-01 DOI: 10.1109/IMOC.2017.8121114
J. Mologni, Jefferson C. Ribas, A. C. Sodré, M. A. R. Alves
{"title":"Investigation on the deployment of FSS as electromagnetic shielding for 5G devices","authors":"J. Mologni, Jefferson C. Ribas, A. C. Sodré, M. A. R. Alves","doi":"10.1109/IMOC.2017.8121114","DOIUrl":"https://doi.org/10.1109/IMOC.2017.8121114","url":null,"abstract":"This paper proposes the use of frequency selective surfaces as electromagnetic shielding on 5G communication devices. This technique intends to enhance the susceptibility from external radiated fields while decreases the radiation emissions in out of communication band, improving the overall electromagnetic compatibility performance of the device. Besides the shielding effect, the frequency selective surface structure should have minimal interference on 5G communication. In order to address this concern, the effects of the FSS shielding in a 28GHz 5×5 patch antenna array installed on a generic smart phone was investigated. Numerical results shows that this technique blocks electromagnetic fields generated at lower frequencies as intended, such as those produced by a DDR4 system operating at 3.2GHz, while decreasing the main lobe of the antenna array in less than 0.9dB for a theta scan angle ranging from 0 to 30 deg.","PeriodicalId":171284,"journal":{"name":"2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"164 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116057363","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
Distributed high birefringence localization based in polarization OTDR converter: A field demonstration 基于偏振OTDR变换器的分布式高双折射定位:现场演示
2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2017-08-01 DOI: 10.1109/IMOC.2017.8121023
C. Floridia, J. Rosolem
{"title":"Distributed high birefringence localization based in polarization OTDR converter: A field demonstration","authors":"C. Floridia, J. Rosolem","doi":"10.1109/IMOC.2017.8121023","DOIUrl":"https://doi.org/10.1109/IMOC.2017.8121023","url":null,"abstract":"We present a field demonstration of a distributed high birefringence localization based in POTDR-C (Polarization Optical Time Domain Reflectometer Converter). In such conception, a low cost converter is used after a commercial OTDR (Optical Time Domain Reflectometer) to reduce spectral line width of OTDR laser. This ensures high sensitivity to SOP (State of Polarization) changes due to local birefringence of optical signal keeping high reach of hundreds kilometers of present OTDR technology. The proposed system was tested in a real installed system in one route of 106.70 km with accumulated polarization mode dispersion (PMD) of 31.46 ps. It successfully determined three segments of high PMD in the route of 8.1 km, 4.0 km and 4.1 km. Replacement of identified high PMD sections resulted in PMD reduction to 1.354 ps, very close to predicted value of 1.314 ps.","PeriodicalId":171284,"journal":{"name":"2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115513587","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
H-shaped fractal antennas for dual-band applications 双频应用的h形分形天线
2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2017-08-01 DOI: 10.1109/IMOC.2017.8121042
Gabriela Luciani, D. F. Mamedes, A. Neto, J. Bornemann
{"title":"H-shaped fractal antennas for dual-band applications","authors":"Gabriela Luciani, D. F. Mamedes, A. Neto, J. Bornemann","doi":"10.1109/IMOC.2017.8121042","DOIUrl":"https://doi.org/10.1109/IMOC.2017.8121042","url":null,"abstract":"This paper presents an antenna miniaturization technique which consists in using the space-filling property offered by the fractal concept. A rectangular Koch curve is applied in a dual-band H-shaped patch radiator in order to miniaturize the antenna at each level of iteration. The approach is validated by simulated and experimental results, which demonstrate good agreement. In comparison with the conventional H-shaped antenna, the H-shaped fractal antennas of level 1 and 2 present a lower first resonant frequency. This technique achieves miniaturization of up to 30 percent of the antenna's total size.","PeriodicalId":171284,"journal":{"name":"2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123105532","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
On the accuracy of approximate descriptions of discrete superpositions of Bessel beams in the generalized Lorenz-Mie theory 广义洛伦兹-米理论中贝塞尔光束离散叠加态近似描述的准确性
2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2017-08-01 DOI: 10.1109/IMOC.2017.8121073
L. Ambrosio, Carlos Henrique da Silva Santos, Ivan Eduardo Lage Rodrigues
{"title":"On the accuracy of approximate descriptions of discrete superpositions of Bessel beams in the generalized Lorenz-Mie theory","authors":"L. Ambrosio, Carlos Henrique da Silva Santos, Ivan Eduardo Lage Rodrigues","doi":"10.1109/IMOC.2017.8121073","DOIUrl":"https://doi.org/10.1109/IMOC.2017.8121073","url":null,"abstract":"This paper aims to investigate one of the most important schemes, viz. the localized approximation (LA), for describing arbitrary-shaped beams in the generalized Lorenz-Mie theory. Our focus is on a specific class of non-diffracting beams called discrete frozen waves, which are constructed from superpositions of Bessel beams and can be designed to provide virtually any longitudinal intensity pattern of interest. Recently, the LA was applied to frozen waves allowing, for the first time, for the analysis of light scattering problems from spherical scatterers and the subsequent determination of the physical/optical quantities in optical trapping. Since the LA cannot be rigorously applied to Bessel beams, it is of interest to determine whether those results and predictions previously established in the literature are reliable or not. To do so, we rely on exact descriptions of frozen waves and establish the limits to the validity of such an approximation scheme. It is revealed that, although serious doubts can be raised against its use, specially due to cumulative errors, the LA is much more robust than previously thought, and it may serve well to both paraxial and non-paraxial Frozen Waves, under certain circumstances.","PeriodicalId":171284,"journal":{"name":"2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124488156","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
Real time beamforming algorithms: Experimental validation 实时波束形成算法:实验验证
2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2017-08-01 DOI: 10.1109/IMOC.2017.8121141
Adilson Chinatto, C. Junqueira
{"title":"Real time beamforming algorithms: Experimental validation","authors":"Adilson Chinatto, C. Junqueira","doi":"10.1109/IMOC.2017.8121141","DOIUrl":"https://doi.org/10.1109/IMOC.2017.8121141","url":null,"abstract":"In this paper, a custom software defined radio that implements a smart antenna array is used in the task of real-time beamforming. Specific beamforming algorithms are implemented in FPGA, remotely controlled by a computer host. The antenna array is mounted in a metallic cylinder and tested in anechoic chamber. Experimental measurements highlight the efficiency of the algorithms implementation. Moreover, the performance differences between the algorithms allow a better comprehension of the challenges of such real-time implementation regarding the hardware, software, and firmware developments.","PeriodicalId":171284,"journal":{"name":"2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124913125","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
Optical filters for narrow-band imaging on medical devices 医疗设备窄带成像用滤光片
2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2017-08-01 DOI: 10.1109/IMOC.2017.8121095
M. F. Silva, T. C. Granado, R. Gonnella, J. P. C. Costa, Y. Assagra, J. Correia, J. Carmo
{"title":"Optical filters for narrow-band imaging on medical devices","authors":"M. F. Silva, T. C. Granado, R. Gonnella, J. P. C. Costa, Y. Assagra, J. Correia, J. Carmo","doi":"10.1109/IMOC.2017.8121095","DOIUrl":"https://doi.org/10.1109/IMOC.2017.8121095","url":null,"abstract":"This paper presents optical filters for narrow-band imaging on medical devices. Two optical filters were designed to provide an extremely narrow passband around the 415 nm (blue) and 540 nm (green) wavelengths using the Fabry-Perot phenomenon. Each filter is composed by successive thin-film layers of dielectric materials of titanium dioxide (TiO2) and silicon dioxide (SiO2). The TiO2 and SiO2 that compose the thin-films were fully characterized by ellipsometry applied within the 250–1700 nm wavelength range. The optical performance of the blue NBI optical filter (415 nm) was also measured. These filters were developed to integrate with light emitting diodes (LED) to provide the desired narrow-band imaging (NBI) bands on medical devices.","PeriodicalId":171284,"journal":{"name":"2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121771317","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
Analysis of dual-band non-uniformly spaced arrays for mobile communications 移动通信用双频非均匀间隔阵列分析
2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2017-08-01 DOI: 10.1109/IMOC.2017.8121121
D. L. Lemes, M. Heckler, L. Greda, R. Farias
{"title":"Analysis of dual-band non-uniformly spaced arrays for mobile communications","authors":"D. L. Lemes, M. Heckler, L. Greda, R. Farias","doi":"10.1109/IMOC.2017.8121121","DOIUrl":"https://doi.org/10.1109/IMOC.2017.8121121","url":null,"abstract":"This paper presents an analysis of a dual-band array for base stations of mobile communication systems. The main challenge is to suppress grating lobes for interelement spacings equal or larger than the wavelength. In order to achieve this result, particle swarm optimization (PSO) is used to find the optimum excitation coefficients (amplitudes and phases) and the non-uniform spacing between elements of the array. The suppression of grating lobes is shown by comparisons with results obtained with a standard uniform linear array for two cases: standard beam pointing to the boresight, and main beam with squared cosecant shape. The use of non-uniform spaced arrays allowed reducing grating lobes in comparison to a standard uniform array.","PeriodicalId":171284,"journal":{"name":"2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":" 31","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113949845","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
Antenna impedance correction for low power energy harvesting devices 低功率能量收集装置的天线阻抗校正
2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2017-08-01 DOI: 10.1109/IMOC.2017.8121124
P. Pereira, R. C. M. Pimenta, R. Adriano, G. L. F. Brandão, U. C. Resende
{"title":"Antenna impedance correction for low power energy harvesting devices","authors":"P. Pereira, R. C. M. Pimenta, R. Adriano, G. L. F. Brandão, U. C. Resende","doi":"10.1109/IMOC.2017.8121124","DOIUrl":"https://doi.org/10.1109/IMOC.2017.8121124","url":null,"abstract":"In this paper, a two-step methodology is presented to design a low power wireless energy harvesting device. The rectenna system, consisting of an half-wave rectifier circuit and a non-50 ohms antenna, is designed to archive maximal power transfer at some specified frequency and power level. The main idea of this work is to obtain maximum efficiency avoiding complex impedance matching circuits. First, the rectifier circuit is designed and its input impedance is measured under the desired operating conditions (frequency range and input power levels). Then, the antenna geometry is optimized to match the complex impedance of the rectifier. Results are presented for a 2.45 GHz rectenna. The performance of the non-50 ohms antenna is compared to a conventional one.","PeriodicalId":171284,"journal":{"name":"2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121071382","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
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