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

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Dual-band antenna array with beam steering for mm-waves 5G networks 具有波束导向的毫米波5G网络双频天线阵列
2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2017-08-01 DOI: 10.1109/IMOC.2017.8121091
I. F. da Costa, S. A. Cerqueira, D. Spadoti
{"title":"Dual-band antenna array with beam steering for mm-waves 5G networks","authors":"I. F. da Costa, S. A. Cerqueira, D. Spadoti","doi":"10.1109/IMOC.2017.8121091","DOIUrl":"https://doi.org/10.1109/IMOC.2017.8121091","url":null,"abstract":"This work reports an innovative structure and preliminary results of a four-elements antenna array with beam steering for 5G access cellular networks, operating in the underutilized millimetre wave (mm-wave) frequency spectrum. Its structure is based on four slotted-waveguide antenna arrays, which enables to simultaneously perform radiation pattern reconfiguration in the 28 GHz and 38 GHz bands, providing scanning range of 75° and 55° for the lower and higher frequency bands, respectively. The bandwidth varies from 24.19 GHz to 31.42GHz and from 36.61 GHz to 39.22GHz.","PeriodicalId":171284,"journal":{"name":"2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"1 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":"122854143","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
GPON-based front-end architecture for 5G networks 5G网络基于gpon的前端架构
2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2017-08-01 DOI: 10.1109/IMOC.2017.8121055
R. N. da Silva, M. Cunha, I. F. da Costa, S. A. Cerqueira
{"title":"GPON-based front-end architecture for 5G networks","authors":"R. N. da Silva, M. Cunha, I. F. da Costa, S. A. Cerqueira","doi":"10.1109/IMOC.2017.8121055","DOIUrl":"https://doi.org/10.1109/IMOC.2017.8121055","url":null,"abstract":"This paper is regarding a GPON-based front-end for multiband 5G cellular networks operating at microwave and mm-waves frequencies. We propose to use an existing optics-fiber infrastructure as a front-end for future optical-wireless 5G networks, by means of applying gigabit-capable passive optical and radio over fiber technologies. Numerical simulations demonstrate the viability of providing 1 and 10 Gbps using the 6 and 38 GHz frequency bands, respectively, which have been considered potential for 5G systems. A performance analysis has been carried out as a function of 64-QAM constellations, signal-to-noise ratio (SNR) and bit error rate (BER). The applicability of the proposed architecture is illustrated by simultaneously transmitting a baseband signal at 2.5 Gbps with BER as low as 10−10 and two different 5G signals at 6 and 38 GHz with SNR higher than 38 dB and BER of 10−3.","PeriodicalId":171284,"journal":{"name":"2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"62 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":"123465980","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: 7
Discrete Hopf fibration in the design of four-dimensional modulations 四维调制设计中的离散霍普夫振动
2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2017-08-01 DOI: 10.1109/IMOC.2017.8121087
F. A. Rodrigues, G. Temporão, J. P. von der Weid
{"title":"Discrete Hopf fibration in the design of four-dimensional modulations","authors":"F. A. Rodrigues, G. Temporão, J. P. von der Weid","doi":"10.1109/IMOC.2017.8121087","DOIUrl":"https://doi.org/10.1109/IMOC.2017.8121087","url":null,"abstract":"In this work we demonstrate how the formalism of Hopf fibration can be useful in the context of classical coherent optical communications. We have found that the Hopf maps can provide complementary information on the geometry of four-dimensional signal space through explicit and concise relations. Using the sampled discrete Hopf fibration, we designed a dense 4D modulation called 14PolSK-8QAM and for practical purposes we demonstrate the close relationship between the Hopf maps and the transfer function of the Polarization Multiplexed Quadrature Mach-Zehnder modulators.","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":"114834515","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
Forward and backward waves propagation in an array of split-ring resonators 分裂环谐振器阵列中的正反向波传播
2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2017-08-01 DOI: 10.1109/IMOC.2017.8121033
J. Neto, J. Barroso, P. J. Castro, U. Hasar
{"title":"Forward and backward waves propagation in an array of split-ring resonators","authors":"J. Neto, J. Barroso, P. J. Castro, U. Hasar","doi":"10.1109/IMOC.2017.8121033","DOIUrl":"https://doi.org/10.1109/IMOC.2017.8121033","url":null,"abstract":"Simulation studies of resonator split-ring resonators inserted in a rectangular waveguide WR-90 are conducted to determine the nature of wave propagation linked to the electric and magnetic responses of a metamaterial array inserted in a WR-90 waveguide. As expected, magnetic transmission band (around 3.6 GHz) is of backward-wave character. However, to the right of the isolated magnetic-resonance mini-band, there appears a wider transmission band (4–8 GHz) with multiple ripples which are identified as being of forward and backward types alternately. Unlike previous works on SRR-loaded waveguides, in which all the transmission resonances in the second band have been classified as of the forward-type, the occurrence of backward-wave transmission peaks in the second transmission band, as it is demonstrated here, has never been reported.","PeriodicalId":171284,"journal":{"name":"2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"14 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":"116911780","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
Photonics-based RF phase shifter for ultra-broadband communications 用于超宽带通信的光子学射频移相器
2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2017-08-01 DOI: 10.1109/IMOC.2017.8121054
M. Cunha, R. N. da Silva, R. Borges, S. A. Cerqueira
{"title":"Photonics-based RF phase shifter for ultra-broadband communications","authors":"M. Cunha, R. N. da Silva, R. Borges, S. A. Cerqueira","doi":"10.1109/IMOC.2017.8121054","DOIUrl":"https://doi.org/10.1109/IMOC.2017.8121054","url":null,"abstract":"This paper presents a simple and reconfigurable photonics-based radiofrequency phase shifter (PBPS) for ultra-broadband communications. The proposed approach makes use of a single DC voltage control to manage the RF signal phase. It employs a single-drive Mach-Zehnder modulator, an optical filter and optical phase shifter for performing a continuous (from 0 to 360°) RF phase shift over an ultra-wide frequency range. Numerical results demonstrate a flatness phase shift of RF signals up to 100 GHz, with low amplitude and phase deviations of 0.002 dB and 0.050°, respectively. The proposed device can be applied to future wireless networks, including 5G systems operating in the millimeter-waves.","PeriodicalId":171284,"journal":{"name":"2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"22 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":"121979506","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
THz dynamically controllable graphene Y-circulator 太赫兹动态可控石墨烯y型环行器
2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2017-08-01 DOI: 10.1109/IMOC.2017.8121025
V. Dmitriev, Wagner Castro, C. Nascimento
{"title":"THz dynamically controllable graphene Y-circulator","authors":"V. Dmitriev, Wagner Castro, C. Nascimento","doi":"10.1109/IMOC.2017.8121025","DOIUrl":"https://doi.org/10.1109/IMOC.2017.8121025","url":null,"abstract":"A new type of the graphene-based three-port circulator is suggested and analysed. The cross-section of the component presents a three-layer structure consisting of graphene, silica and silicon. The in-plane figure of the circulator presents a circular graphene resonator and three waveguides symmetrically connected to it. The graphene is magnetized normally to its plane by a DC magnetic field. The physical principle of the device is based on the dipole resonance of the magnetized graphene resonator. We investigate the influence of different parameters on characteristics of the circulator. Numerical simulations demonstrate the isolation of −15 dB in 9.4% bandwidth with the central frequency 5.38 THz. The biasing DC magnetic field is 0.57 T.","PeriodicalId":171284,"journal":{"name":"2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"1 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":"129274736","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
Design of microstrip monopoles for broadband systems using an iterative wave formulation 用迭代波公式设计宽带系统微带单极子
2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2017-08-01 DOI: 10.1109/IMOC.2017.8121128
V. P. S. Neto, M. J. Duarte, Jurgen K. A. Nogueira, A. D’assunção
{"title":"Design of microstrip monopoles for broadband systems using an iterative wave formulation","authors":"V. P. S. Neto, M. J. Duarte, Jurgen K. A. Nogueira, A. D’assunção","doi":"10.1109/IMOC.2017.8121128","DOIUrl":"https://doi.org/10.1109/IMOC.2017.8121128","url":null,"abstract":"This paper presents the analysis of microstrip monopoles for applications in ultra wideband systems (UWB). Antenna structures using circular and semi annular ring patches are considered. The antennas are printed on a FR4 dielectric substrate and present truncated ground planes with a small cut beneath the microstrip line feeder to improve the antenna impedance matching. Results for return loss, resonant frequency, and impedance bandwidth are calculated using an iterative full-wave formulation based on the concept of electromagnetic waves (WCIP Method) and simulated using Ansoft HFSS software. Prototypes are fabricated and measured for validation purpose. Agreement is observed between WCIP calculated, HFSS simulated and measured results, confirming the WCIP method accuracy. The performance of the developed antennas are suitable for UWB and broadband systems.","PeriodicalId":171284,"journal":{"name":"2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"8 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":"128088910","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
Retrieval parameters of chiral metamaterials with proposed crescent shaped split ring resonators 提出的新月形裂环谐振器的手性超材料检索参数
2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2017-08-01 DOI: 10.1109/IMOC.2017.8121101
M. Bute, U. Hasar, J. Barroso
{"title":"Retrieval parameters of chiral metamaterials with proposed crescent shaped split ring resonators","authors":"M. Bute, U. Hasar, J. Barroso","doi":"10.1109/IMOC.2017.8121101","DOIUrl":"https://doi.org/10.1109/IMOC.2017.8121101","url":null,"abstract":"We propose a new uniaxial chiral metamaterial which is composed of four crescent shaped split-ring resonators mutually twisted by 90° and patterned on opposite sides of a dielectric substrate. It illustrates a strong optical activity and circular dichroism in the range from 5 GHz to 10 GHz. The presented design can be fabricated more easily due to its efficient metallic structures. Furthermore, chirality value of this proposed chiral metamaterial is large enough the optical applications. This study also shows that the proposed crescent shaped chiral metamaterials have good responses when compared with other studied samples in literature. All validations are performed by computer simulation program CST Microwave Studio in the 5–10 GHz frequency range.","PeriodicalId":171284,"journal":{"name":"2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"4 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":"114743809","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
Impact of the phase modulation index in the performance of CO-OFDM systems based on electrical domain constant-envelope signals 相位调制指数对基于电域恒包络信号的 CO-OFDM 系统性能的影响
2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2017-08-01 DOI: 10.1109/IMOC.2017.8121142
V. O. C. Dias, E. Pereira, H. Rocha, M. Segatto, Jair A. L. Silva
{"title":"Impact of the phase modulation index in the performance of CO-OFDM systems based on electrical domain constant-envelope signals","authors":"V. O. C. Dias, E. Pereira, H. Rocha, M. Segatto, Jair A. L. Silva","doi":"10.1109/IMOC.2017.8121142","DOIUrl":"https://doi.org/10.1109/IMOC.2017.8121142","url":null,"abstract":"The impact of the electrical phase modulation index 2πh in the performance of coherent detection optical OFDM systems based on electrical constant-envelope signals is analytically and numerically evaluated in this paper. A compromise between 2πh and system performance, that considers the effect of nonlinearities inserted by Mach-Zehnder optical modulators, is established. Moreover, it is shown that this type of peak-to-average power ratio (PAPR) reduction technique reduces the impact of the optical modulation index in the performance.","PeriodicalId":171284,"journal":{"name":"2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"1 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":"129412170","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
Harmonic suppression in microstrip patch antenna using spur-line filter 利用杂散线滤波器抑制微带贴片天线中的谐波
2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2017-08-01 DOI: 10.1109/IMOC.2017.8121138
Fabricio Ferreira Batista, Laio Lucas de Souza, João Paulo Fernandes da Silva, Paulo Henrique da Fonseca Silva, Maciel Alves de Oliveira, G. Fontgalland
{"title":"Harmonic suppression in microstrip patch antenna using spur-line filter","authors":"Fabricio Ferreira Batista, Laio Lucas de Souza, João Paulo Fernandes da Silva, Paulo Henrique da Fonseca Silva, Maciel Alves de Oliveira, G. Fontgalland","doi":"10.1109/IMOC.2017.8121138","DOIUrl":"https://doi.org/10.1109/IMOC.2017.8121138","url":null,"abstract":"This paper proposes a method for suppression of higher order harmonics in microstrip antenna using spur-line filter. The microstrip antenna is designed to operate at frequency 2.45 GHz. For the antenna input impedance design, it was used a combination of quarter-wavelength transformer and inset feed impedance matching technique. To suppress the second and third harmonics a spur-line filter was inserted in the antenna microstrip feed line. The measured and simulated results are presented for the proposed antenna. The analysis of the antenna radiation properties shows that beyond the accuracy of high order mode suppression, the insertion of spur-line filter does not any degradation into the radiation pattern.","PeriodicalId":171284,"journal":{"name":"2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"101 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":"132853040","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
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