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Coverage prediction models fitted to the signal measurements of digital TV in Brazilian cities 覆盖预测模型适用于巴西城市数字电视的信号测量
2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC) Pub Date : 2013-10-28 DOI: 10.1109/IMOC.2013.6646535
F. S. Silva, L. Matos, F. A. C. Peres, G. L. Siqueira
{"title":"Coverage prediction models fitted to the signal measurements of digital TV in Brazilian cities","authors":"F. S. Silva, L. Matos, F. A. C. Peres, G. L. Siqueira","doi":"10.1109/IMOC.2013.6646535","DOIUrl":"https://doi.org/10.1109/IMOC.2013.6646535","url":null,"abstract":"Broadcast television is one of the most important telecommunications systems in Brazil. Such relevance in the socio-cultural context requires a continuous pursuit of technical excellence in order to offer an increasingly attractive product to the viewer. Therefore, it is mandatory to care about the coverage and quality of the TV signal, especially when it comes to Digital TV. In this scenario, it is imperative to study propagation models to predict the coverage allowing broadcasters to properly project their stations and regulators to distribute the channels harmoniously. The aim of this study is to compare the field strength measurements of a Digital TV signal in five cities of Brazil, with the values predicted by some models and to conclude for the best one.","PeriodicalId":395359,"journal":{"name":"2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC)","volume":"421 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":"131980973","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
Using Multi-Layer Perceptron and complex network metrics to estimate the performance of optical networks 利用多层感知器和复杂网络度量来估计光网络的性能
2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC) Pub Date : 2013-10-28 DOI: 10.1109/IMOC.2013.6646463
Danilo R. B. De Araújo, J. Martins-Filho, C. Bastos-Filho
{"title":"Using Multi-Layer Perceptron and complex network metrics to estimate the performance of optical networks","authors":"Danilo R. B. De Araújo, J. Martins-Filho, C. Bastos-Filho","doi":"10.1109/IMOC.2013.6646463","DOIUrl":"https://doi.org/10.1109/IMOC.2013.6646463","url":null,"abstract":"The performance assessment of a WDM network considering physical impairments is a difficult task and is frequently accomplished by using time consuming computational simulations. On the other hand, we observed that several metrics have been proposed to assess different aspects of a network structure. In this paper we propose that a set of metrics can be combined in order to obtain a fast estimation of a WDM network performance, based on a historical database of networks. The estimator was obtained by means of the most used Artificial Neural Network (ANN) architecture, called Multi-Layer Perceptron, that was trained using the classical back-propagation algorithm. According to our results, it is possible to build an estimator based on network metrics that assess WDM networks considering the trade-off between the processing time and the precision of the results. Our study also suggests that this kind of estimator can be easily adapted to other scenarios of WDM networks since Artificial Neural Networks present interesting characteristics, such as adaptation and flexibility.","PeriodicalId":395359,"journal":{"name":"2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC)","volume":"1 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":"132047967","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
Ethanol fuel analysis by Time-Domain Reflectometry 时域反射法分析乙醇燃料
2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC) Pub Date : 2013-10-28 DOI: 10.1109/IMOC.2013.6646441
Daniel B. R. Rodrigues, H. Peres, Wesley Becari
{"title":"Ethanol fuel analysis by Time-Domain Reflectometry","authors":"Daniel B. R. Rodrigues, H. Peres, Wesley Becari","doi":"10.1109/IMOC.2013.6646441","DOIUrl":"https://doi.org/10.1109/IMOC.2013.6646441","url":null,"abstract":"The technique of Time Domain Reflectometry (TDR) is applied for qualifying ethanol adulterated with water and / or methanol. We used the commercial TDR model VG400, which was originally developed for determining soil moisture, making this study an original approach for qualifying fuels. Several samples of alcohol with the addition of its main contaminants (water and methanol) were prepared and measured with the TDR sensor. The results indicate good response linearity, showing the TDR technique is a promising technique for fuel qualification.","PeriodicalId":395359,"journal":{"name":"2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC)","volume":"168 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":"132051652","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
Multi-layer patch antenna array design for Ka-band satellite communication ka波段卫星通信多层贴片天线阵列设计
2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC) Pub Date : 2013-10-28 DOI: 10.1109/IMOC.2013.6646446
R. Wilke, S. Hamid, K. Schraml, Rahul Khunti, D. Herberling
{"title":"Multi-layer patch antenna array design for Ka-band satellite communication","authors":"R. Wilke, S. Hamid, K. Schraml, Rahul Khunti, D. Herberling","doi":"10.1109/IMOC.2013.6646446","DOIUrl":"https://doi.org/10.1109/IMOC.2013.6646446","url":null,"abstract":"The GeReLEO-SMART project aims to build a communication experiment to be launched on the German technology demonstration mission “Heinrich-Hertz” (H2SAT). On its geostationary orbit it will demonstrate new space appropriate technology of a 26 GHz patch antenna array with integrated low noise amplifiers (LNA), MEMS switching of the RF signal and FPGA mission control. The antenna consists of a multi-layer structure including a pre selector band pass filter to suppress other radio sources on the Heinrich-Hertz satellite. The reception antenna consists of five 2×2 array of circular patch antennas with a feeding network. A temperature stabilized LNA is buried into the PCB stack to minimize transmission line losses in front of it. Two different designs of the antenna array are presented to compare the space qualification by real tests and measurements.","PeriodicalId":395359,"journal":{"name":"2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC)","volume":"43 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":"131197237","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: 13
Arrays of rectangular patch microstrip antennas for aerospace applications 航空航天用矩形贴片微带天线阵列
2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC) Pub Date : 2013-10-28 DOI: 10.1109/IMOC.2013.6646576
D. R. Minervino, A. Gomes D'Assunção, Albanisa F. dos Santos, Joao B. Dolvim Dantas, P. H. da Fonseca Silva
{"title":"Arrays of rectangular patch microstrip antennas for aerospace applications","authors":"D. R. Minervino, A. Gomes D'Assunção, Albanisa F. dos Santos, Joao B. Dolvim Dantas, P. H. da Fonseca Silva","doi":"10.1109/IMOC.2013.6646576","DOIUrl":"https://doi.org/10.1109/IMOC.2013.6646576","url":null,"abstract":"This work presents an investigation on the performance of rectangular microstrip antenna arrays with m×n rectangular patch elements. Several rectangular antenna array geometries are investigated namely 2×1, 1×2, 2×2, 2×4 and 4×2 for aerospace microwave applications. Simulations are performed using Ansoft HFSS commercial software. Simulated results are shown for the antenna arrays return loss, resonant frequencies, bandwidth, and gain, taking into account the array geometry and number of patch elements. To validate the simulated results, several prototypes are built and measured. Agreement is observed between simulation and measurement results.","PeriodicalId":395359,"journal":{"name":"2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC)","volume":"24 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":"115356324","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
Simultaneous biophoton measurement of control and fluoride stressed seedlings samples 对照和氟胁迫幼苗样品的同步光子测量
2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC) Pub Date : 2013-10-28 DOI: 10.1109/IMOC.2013.6646406
E. Bertogna, E. Conforti, C. Gallep
{"title":"Simultaneous biophoton measurement of control and fluoride stressed seedlings samples","authors":"E. Bertogna, E. Conforti, C. Gallep","doi":"10.1109/IMOC.2013.6646406","DOIUrl":"https://doi.org/10.1109/IMOC.2013.6646406","url":null,"abstract":"A series of 10 germinations experiments with duplicated wheat seedlings samples - one imbibed in sodium fluoride (NaF, EC50) and another in water - have their spontaneous, ultra-weak photon emission measured simultaneously for 24-h, at the 4th day of germination, in two identical measurement systems. The UPE profiles of acute stressed sprouts present initially higher increase but after 6 hours a fast decrease. These variations for the profiles local angular coefficient are so correlated to germination parameters - roots elongation and biomass gain - with clear difference between the stressed and control samples. Variations of such methodology can be developed for quick and reliable analysis of toxicity in germination tests.","PeriodicalId":395359,"journal":{"name":"2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC)","volume":"8 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":"117311225","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
Design of a ×4 subharmonic sub-millimeter wave diode mixer, based on an analytic expression for small-signal conversion admittance parameters 基于小信号转换导纳参数解析表达式的×4次谐波亚毫米波二极管混频器的设计
2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC) Pub Date : 2013-10-28 DOI: 10.1109/IMOC.2013.6646457
R. Michaelsen, T. Johansen, V. Krozer
{"title":"Design of a ×4 subharmonic sub-millimeter wave diode mixer, based on an analytic expression for small-signal conversion admittance parameters","authors":"R. Michaelsen, T. Johansen, V. Krozer","doi":"10.1109/IMOC.2013.6646457","DOIUrl":"https://doi.org/10.1109/IMOC.2013.6646457","url":null,"abstract":"Instead of using frequency multipliers before a fundamental mixer, subharmonic mixers can be used. In order to develop novel subharmonic mixer architectures it is necessary to know the exact signal phase at the nonlinear element. The purpose of this paper is to generalize the description of the small-signal admittance in a Schottky-diode mixer where the phase can be set arbitrarily. It is shown that only for the case of a fundamental frequency mixer this admittance becomes a purely real valued conductance. To test the theory a ×4 subharmonic sub-millimeter wave mixer is designed and simulated. With an RF frequency of 640 GHz, this design achieves a conversion gain of -13.5 dB with a LO-power of only -2.5 dBm.","PeriodicalId":395359,"journal":{"name":"2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC)","volume":"22 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":"121949748","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
Experimental demonstration of PAPR reduction in 10 Gbit/s SSB-OFDM direct-detection systems through symbol precoding 符号预编码在10gbit /s SSB-OFDM直接检测系统中降低PAPR的实验演示
2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC) Pub Date : 2013-10-28 DOI: 10.1109/IMOC.2013.6646525
Pedro E. D. Cruz, T. Alves, A. Cartaxo
{"title":"Experimental demonstration of PAPR reduction in 10 Gbit/s SSB-OFDM direct-detection systems through symbol precoding","authors":"Pedro E. D. Cruz, T. Alves, A. Cartaxo","doi":"10.1109/IMOC.2013.6646525","DOIUrl":"https://doi.org/10.1109/IMOC.2013.6646525","url":null,"abstract":"The performance improvement of single-sideband orthogonal frequency division multiplexing (OFDM) signals in 10 Gbit/s direct-detection systems for metropolitan telecommunication networks, by reducing the peak-to-average power ratio (PAPR) with a symbol precoding technique is assessed experimentally. The symbol precoding technique achieves a 3 dB PAPR reduction without adding excess bandwidth to the OFDM signal. A bit error ratio improvement of more than order of magnitude is experimentally shown along 150 km standard single mode fiber transmission.","PeriodicalId":395359,"journal":{"name":"2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC)","volume":"59 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":"125903452","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
Experimental measurements of radiation patterns of a wire-medium loaded X-band antenna 线介质负载x波段天线辐射方向图的实验测量
2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC) Pub Date : 2013-10-28 DOI: 10.1109/IMOC.2013.6646492
Antônio Tomaz, J. Barroso, P. J. Castro
{"title":"Experimental measurements of radiation patterns of a wire-medium loaded X-band antenna","authors":"Antônio Tomaz, J. Barroso, P. J. Castro","doi":"10.1109/IMOC.2013.6646492","DOIUrl":"https://doi.org/10.1109/IMOC.2013.6646492","url":null,"abstract":"This paper reports on the radiation patterns measured on a X-band antenna loaded with a periodic array of metallic wires. Design details of the wire medium to provide low return losses in the range 8 to 12 GHz are given. Using different test setups, the diagram patterns are measured at different frequencies associated with minimal return losses. Radiation characteristics of the loaded antenna are discussed.","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":"129615500","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
Compact triplexer with open ring resonators as microstrip trisection bandpass filters for asymmetric response 紧凑型三工器与开环谐振器作为微带三分带通滤波器的非对称响应
2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC) Pub Date : 2013-10-28 DOI: 10.1109/IMOC.2013.6646512
P. Castillo‐Araníbar, P. Rodriguez-Postigo, A. García-Lampérez, D. Segovia-Vargas
{"title":"Compact triplexer with open ring resonators as microstrip trisection bandpass filters for asymmetric response","authors":"P. Castillo‐Araníbar, P. Rodriguez-Postigo, A. García-Lampérez, D. Segovia-Vargas","doi":"10.1109/IMOC.2013.6646512","DOIUrl":"https://doi.org/10.1109/IMOC.2013.6646512","url":null,"abstract":"Open loop ring resonators are used as the basic block of a compact planar triplexer, they are used in cascaded trisection (CT) filters, in order to reduce the circuit size. The CT filter has a cross coupling that produces a single attenuation pole at finite frequency used to shape the bandpass response. Ring resonators are properly located with respect to the input and output feed lines, in order to get good isolation response, and also to suppress channel interfering and to meet the design specifications for applications in mobile communication. The triplexer was fabricated and measured to verify the viability of the design with good agreements between the measurements and the simulations.","PeriodicalId":395359,"journal":{"name":"2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC)","volume":"5 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":"127291568","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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