Pub Date : 2015-11-01DOI: 10.1109/IMOC.2015.7369075
Alexandre Alves da Rocha, C. Rego, F. Moreira
This work presents results involving the application of the CSB-MoM, a new hybrid complex source beam moment method, as an algorithm that analyzes propagation and scattering problems over large terrains. Thus, the formulation of the CSB-MoM is presented and then applied to a two-dimensional terrain profile. It is shown that the method can successfully reduce the memory and storage requirements, as well as average CPU time to a scale of O(N3/2) as opposed to O(N2) of the standard MoM.
{"title":"Use of complex source beam-moment method for solving scattering problems from terrain profiles","authors":"Alexandre Alves da Rocha, C. Rego, F. Moreira","doi":"10.1109/IMOC.2015.7369075","DOIUrl":"https://doi.org/10.1109/IMOC.2015.7369075","url":null,"abstract":"This work presents results involving the application of the CSB-MoM, a new hybrid complex source beam moment method, as an algorithm that analyzes propagation and scattering problems over large terrains. Thus, the formulation of the CSB-MoM is presented and then applied to a two-dimensional terrain profile. It is shown that the method can successfully reduce the memory and storage requirements, as well as average CPU time to a scale of O(N3/2) as opposed to O(N2) of the standard MoM.","PeriodicalId":431462,"journal":{"name":"2015 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129950751","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}
Pub Date : 2015-11-01DOI: 10.1109/IMOC.2015.7369183
M. Alves, Inacio Malmonge Martin, Luiza de Castro Folgueras
Isohyetal maps of daily accumulated precipitation were made using data collected in January, 2015, by a rain gauge network and an S-band Doppler weather radar. The maps were compared to determine the quality of the precipitation estimated using the radar data. The results indicate that within the study area, the S-band Doppler radar and the rain gauge network produced similar results, suggesting that within certain conditions the weather radar can perform as well as a rain gauge network.
{"title":"Comparison of the spatial distribution of precipitation estimated by an S-band Doppler radar and by a rain gauge network in São Paulo, Brazil","authors":"M. Alves, Inacio Malmonge Martin, Luiza de Castro Folgueras","doi":"10.1109/IMOC.2015.7369183","DOIUrl":"https://doi.org/10.1109/IMOC.2015.7369183","url":null,"abstract":"Isohyetal maps of daily accumulated precipitation were made using data collected in January, 2015, by a rain gauge network and an S-band Doppler weather radar. The maps were compared to determine the quality of the precipitation estimated using the radar data. The results indicate that within the study area, the S-band Doppler radar and the rain gauge network produced similar results, suggesting that within certain conditions the weather radar can perform as well as a rain gauge network.","PeriodicalId":431462,"journal":{"name":"2015 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128787366","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}
Pub Date : 2015-11-01DOI: 10.1109/IMOC.2015.7369094
G. Rafael-Valdivia, Anthony Urquizo, Thalia Mendoza, S. Barbin
In this paper, a new technique for modeling GaN and GaAs transistors is presented. The technique can model one of the most critical phenomena in telecommunications, frequency dispersion effects which is related to memory effects. Results of measurements reveal the accuracy of this technique under small-signal and large-signal conditions. The proposed technique can be embedded into other models to improve its capabilities using only one current source in a new large signal equivalent circuit.
{"title":"Nonlinear device model for GaN and GaAs microwave transistors including memory effects","authors":"G. Rafael-Valdivia, Anthony Urquizo, Thalia Mendoza, S. Barbin","doi":"10.1109/IMOC.2015.7369094","DOIUrl":"https://doi.org/10.1109/IMOC.2015.7369094","url":null,"abstract":"In this paper, a new technique for modeling GaN and GaAs transistors is presented. The technique can model one of the most critical phenomena in telecommunications, frequency dispersion effects which is related to memory effects. Results of measurements reveal the accuracy of this technique under small-signal and large-signal conditions. The proposed technique can be embedded into other models to improve its capabilities using only one current source in a new large signal equivalent circuit.","PeriodicalId":431462,"journal":{"name":"2015 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129296909","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}
Pub Date : 2015-11-01DOI: 10.1109/IMOC.2015.7369200
Crislane P. N. Silva, E. D. de Oliveira, M. D. de Oliveira, M. T. de Melo, B. D. de Oliveira
The authors present a novel compact 3-bit interferometer based on Hilbert fractal geometry for application to Instantaneous Frequency Measurement (IFM) system operating in the range 4.66-6.38 GHz. The interferometers use two-way Wilkinson power dividers connected to two microstrip line with different signal delays, where one of these microstrip lines is based on Hilbert fractal curve. A full wave EM simulator is used to obtain the frequency response. Simulated responses are presented and compared to theoretical results.
{"title":"New compact interferometer based on fractal concept","authors":"Crislane P. N. Silva, E. D. de Oliveira, M. D. de Oliveira, M. T. de Melo, B. D. de Oliveira","doi":"10.1109/IMOC.2015.7369200","DOIUrl":"https://doi.org/10.1109/IMOC.2015.7369200","url":null,"abstract":"The authors present a novel compact 3-bit interferometer based on Hilbert fractal geometry for application to Instantaneous Frequency Measurement (IFM) system operating in the range 4.66-6.38 GHz. The interferometers use two-way Wilkinson power dividers connected to two microstrip line with different signal delays, where one of these microstrip lines is based on Hilbert fractal curve. A full wave EM simulator is used to obtain the frequency response. Simulated responses are presented and compared to theoretical results.","PeriodicalId":431462,"journal":{"name":"2015 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130271247","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}
Pub Date : 2015-11-01DOI: 10.1109/IMOC.2015.7369093
K. Q. da Costa, J. Costa, V. Dmitriev, T. Del Rosso, O. Pandoli, R. Aucélio
This paper presents a theoretical analysis of a surface plasmon resonance sensor coupled to a periodic array of spherical gold nanoparticles (AuNps). The sensor is in the Kretschmann configuration and composed by five layers: prism, thin gold film, dielectric insulator, array of AuNps and air. The AuNps layer is modeled with an effective permittivity by the Maxwell-Garnett mixing formula, and the wave propagation is analyzed using a generalized reflection coefficient. The results are presented in terms of reflectivity and modal field distributions for different thickness of the layers and geometry of the AuNps array.
{"title":"Analysis of surface plasmon resonance sensor coupled to periodic array of gold nanoparticles","authors":"K. Q. da Costa, J. Costa, V. Dmitriev, T. Del Rosso, O. Pandoli, R. Aucélio","doi":"10.1109/IMOC.2015.7369093","DOIUrl":"https://doi.org/10.1109/IMOC.2015.7369093","url":null,"abstract":"This paper presents a theoretical analysis of a surface plasmon resonance sensor coupled to a periodic array of spherical gold nanoparticles (AuNps). The sensor is in the Kretschmann configuration and composed by five layers: prism, thin gold film, dielectric insulator, array of AuNps and air. The AuNps layer is modeled with an effective permittivity by the Maxwell-Garnett mixing formula, and the wave propagation is analyzed using a generalized reflection coefficient. The results are presented in terms of reflectivity and modal field distributions for different thickness of the layers and geometry of the AuNps array.","PeriodicalId":431462,"journal":{"name":"2015 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123380383","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}
Pub Date : 2015-11-01DOI: 10.1109/IMOC.2015.7369079
Nereida L. Valdivia, M. de Lacerda Rocha, Amilcar Careli Cesar
The growth of data traffic in telecommunication networks has increased the power consumption and its saving has become a key issue in planning and management of telecommunication networks. On the other hand, to guarantee availability and reliability, core optical networks have redundant resources to support extra traffic demand or infrastructure fault. The dedicated path protection (DPP) is an effective and widely used scheme to manage fault. However, networks supporting such strategy keep protection paths in active state, even in conditions where they are not carrying traffic, thus consuming power unnecessarily. To overcome this inefficiency, an effective strategy for decreasing wasted power is an adaptive traffic routing based on sleep mode, which is a state of low power consumption able to change quickly to an active state. The strategy is to route the traffic in order to maximize the amount of network components used by protection paths that can be set in sleep mode. In general, reported strategies reduce power consumption at the expense of increasing blocking probability. In this article, we address the power saving problem in WDM networks using DPP scheme proposing a wider resource search routing and wavelength assignment (RWA), named in-depth (ID-) RWA. Computer simulations based on the COST239 topology showed that the ID-RWA has better performance regarding the compromise between blocking probability and power consumption. Moreover, it manages to decrease the blocking probability while boosting the energy awareness.
{"title":"Energy-aware traffic routing and resource allocation in WDM optical networks","authors":"Nereida L. Valdivia, M. de Lacerda Rocha, Amilcar Careli Cesar","doi":"10.1109/IMOC.2015.7369079","DOIUrl":"https://doi.org/10.1109/IMOC.2015.7369079","url":null,"abstract":"The growth of data traffic in telecommunication networks has increased the power consumption and its saving has become a key issue in planning and management of telecommunication networks. On the other hand, to guarantee availability and reliability, core optical networks have redundant resources to support extra traffic demand or infrastructure fault. The dedicated path protection (DPP) is an effective and widely used scheme to manage fault. However, networks supporting such strategy keep protection paths in active state, even in conditions where they are not carrying traffic, thus consuming power unnecessarily. To overcome this inefficiency, an effective strategy for decreasing wasted power is an adaptive traffic routing based on sleep mode, which is a state of low power consumption able to change quickly to an active state. The strategy is to route the traffic in order to maximize the amount of network components used by protection paths that can be set in sleep mode. In general, reported strategies reduce power consumption at the expense of increasing blocking probability. In this article, we address the power saving problem in WDM networks using DPP scheme proposing a wider resource search routing and wavelength assignment (RWA), named in-depth (ID-) RWA. Computer simulations based on the COST239 topology showed that the ID-RWA has better performance regarding the compromise between blocking probability and power consumption. Moreover, it manages to decrease the blocking probability while boosting the energy awareness.","PeriodicalId":431462,"journal":{"name":"2015 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123446092","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}
Pub Date : 2015-11-01DOI: 10.1109/IMOC.2015.7369165
J. Grzyb, K. Statnikov, N. Sarmah, U. Pfeiffer
This paper reports on the design of a broadband lens-integrated differentially-driven circularly polarized annular slot on-chip antenna for a 240 GHz homodyne monostatic FMCW transceiver in a SiGe HBT technology. A complete antenna layout consists of the main radiating annular slot fed by a wideband differential quadrature coupler. The slot is excited by 2 pairs of orthogonal sectorial patch probes located 90° apart along the slot circumference, whereby the mutual coupling between them is exploited to extend the antenna operation bandwidth. The circularly-polarized antenna was simulated to provide an input match superior to -25 dB for 180-310 GHz with consistent radiation patterns. The antenna allows a frequency-unlimited high-efficiency operation of the FMCW transceiver module with a Tx/Rx isolation below -22 dB for 180-310 GHz, a peak radiated power of 4 dBm and in excess of -10 dBm for 214-268 GHz.
{"title":"A wideband 240 GHz lens-integrated circularly polarized on-chip annular slot antenna for a FMCW radar transceiver module in SiGe technology","authors":"J. Grzyb, K. Statnikov, N. Sarmah, U. Pfeiffer","doi":"10.1109/IMOC.2015.7369165","DOIUrl":"https://doi.org/10.1109/IMOC.2015.7369165","url":null,"abstract":"This paper reports on the design of a broadband lens-integrated differentially-driven circularly polarized annular slot on-chip antenna for a 240 GHz homodyne monostatic FMCW transceiver in a SiGe HBT technology. A complete antenna layout consists of the main radiating annular slot fed by a wideband differential quadrature coupler. The slot is excited by 2 pairs of orthogonal sectorial patch probes located 90° apart along the slot circumference, whereby the mutual coupling between them is exploited to extend the antenna operation bandwidth. The circularly-polarized antenna was simulated to provide an input match superior to -25 dB for 180-310 GHz with consistent radiation patterns. The antenna allows a frequency-unlimited high-efficiency operation of the FMCW transceiver module with a Tx/Rx isolation below -22 dB for 180-310 GHz, a peak radiated power of 4 dBm and in excess of -10 dBm for 214-268 GHz.","PeriodicalId":431462,"journal":{"name":"2015 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114804882","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}
Pub Date : 2015-11-01DOI: 10.1109/IMOC.2015.7369048
A. Hamidian, S. Barbin, G. Boeck
This paper presents a fully integrated 60 GHz double-balanced Gilbert cell up-conversion mixer implemented in 90 nm LP CMOS technology. The mixer has been designed for very low DC power consumption (11 mW) and wideband performance to cover the four channel bands of the IEEE802.15.3c standard. Due to measurement limitations different transformers have been designed for IF, LO and RF path to facilitate the measurement of the mixer with single-ended equipment. The up-converter achieves a flat conversion gain of -8 dB and output power at 1 dB gain compression point of -11 dBm for channels.
{"title":"A wideband Gilbert cell up-converter in 90 nm CMOS for 60 GHz application","authors":"A. Hamidian, S. Barbin, G. Boeck","doi":"10.1109/IMOC.2015.7369048","DOIUrl":"https://doi.org/10.1109/IMOC.2015.7369048","url":null,"abstract":"This paper presents a fully integrated 60 GHz double-balanced Gilbert cell up-conversion mixer implemented in 90 nm LP CMOS technology. The mixer has been designed for very low DC power consumption (11 mW) and wideband performance to cover the four channel bands of the IEEE802.15.3c standard. Due to measurement limitations different transformers have been designed for IF, LO and RF path to facilitate the measurement of the mixer with single-ended equipment. The up-converter achieves a flat conversion gain of -8 dB and output power at 1 dB gain compression point of -11 dBm for channels.","PeriodicalId":431462,"journal":{"name":"2015 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127666439","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}
Pub Date : 2015-11-01DOI: 10.1109/IMOC.2015.7369133
P. Rocha, C. Gallep, E. Conforti
Numerical results for distortion and further regeneration of optical 32QAM by SOAs are presented. The distortions caused by the first SOA were reduced by a second device acting as a saturable absorber. EVM is reduced from 36% to 16% for 10 Gbaud, and from 24% to 12% for 20 Gbaud (Pin = -10.5 dBm). It is demonstrated that the two SOAs, if properly operated, can work as a quasi-linear amplifier and so be eligible to be used in middle range links employing multilevel and/or phase encoded optical signal.
{"title":"Distortion and regeneration of optical 32QAM by semiconductor optical amplifiers","authors":"P. Rocha, C. Gallep, E. Conforti","doi":"10.1109/IMOC.2015.7369133","DOIUrl":"https://doi.org/10.1109/IMOC.2015.7369133","url":null,"abstract":"Numerical results for distortion and further regeneration of optical 32QAM by SOAs are presented. The distortions caused by the first SOA were reduced by a second device acting as a saturable absorber. EVM is reduced from 36% to 16% for 10 Gbaud, and from 24% to 12% for 20 Gbaud (Pin = -10.5 dBm). It is demonstrated that the two SOAs, if properly operated, can work as a quasi-linear amplifier and so be eligible to be used in middle range links employing multilevel and/or phase encoded optical signal.","PeriodicalId":431462,"journal":{"name":"2015 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128148457","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}
Pub Date : 2015-11-01DOI: 10.1109/IMOC.2015.7369218
V. P. S. Neto, Jurgen K. A. Nogueira, A. D’assunção
This work presents the frequency response analysis of a planar band pass filter using the WCIP method. The filter geometry is composed of a rectangular microstrip patch with a perforated complementary split ring resonator (CSRR). The investigation of the filter properties is done considering the perforated patch geometry printed on isotropic and anisotropic substrates. Simulations results are determined by WCIP method and HFSS software, for comparison purpose, for the filter resonant frequency, bandwidth, return loss, and insertion loss. A prototype of the proposed band pass filter printed on isotropic substrate was fabricated and measured. Simulation (WCIP and HFSS) and measurement results are in good agreement.
{"title":"Analysis of band pass filter printed on isotropic and anisotropic substrates by the WCIP method","authors":"V. P. S. Neto, Jurgen K. A. Nogueira, A. D’assunção","doi":"10.1109/IMOC.2015.7369218","DOIUrl":"https://doi.org/10.1109/IMOC.2015.7369218","url":null,"abstract":"This work presents the frequency response analysis of a planar band pass filter using the WCIP method. The filter geometry is composed of a rectangular microstrip patch with a perforated complementary split ring resonator (CSRR). The investigation of the filter properties is done considering the perforated patch geometry printed on isotropic and anisotropic substrates. Simulations results are determined by WCIP method and HFSS software, for comparison purpose, for the filter resonant frequency, bandwidth, return loss, and insertion loss. A prototype of the proposed band pass filter printed on isotropic substrate was fabricated and measured. Simulation (WCIP and HFSS) and measurement results are in good agreement.","PeriodicalId":431462,"journal":{"name":"2015 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127877649","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}
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