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

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Modeling electromagnetic wave propagation in the UHF range using the MoM to assess NIR exposure level 利用MoM对UHF范围内的电磁波传播进行建模，以评估近红外暴露水平
2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC) Pub Date : 2013-10-28 DOI: 10.1109/IMOC.2013.6646580
C. Guerreiro, S. Fraiha, R. Fraiha, C. Ruiz, H. Gomes, G. Cavalcante, J. Rodrigues, J. Araújo
{"title":"Modeling electromagnetic wave propagation in the UHF range using the MoM to assess NIR exposure level","authors":"C. Guerreiro, S. Fraiha, R. Fraiha, C. Ruiz, H. Gomes, G. Cavalcante, J. Rodrigues, J. Araújo","doi":"10.1109/IMOC.2013.6646580","DOIUrl":"https://doi.org/10.1109/IMOC.2013.6646580","url":null,"abstract":"A computational method for predicting electromagnetic wave propagation in the UHF range using the method of moments (MoM) is proposed. National regulation represented by the resolution No. 303/2002 of the National Telecommunications Agency (ANATEL) joined the guidelines of the International Commission on Non-Ionizing Radiation Protection (ICNIRP) for limiting the human exposure to electromagnetic fields. There are several methods to assess the exposure level but the MoM is suitable for both far and near-field in an open topology through numerical simulation. The objective of this work is to evaluate the levels of non-ionizing radiation that the population, inhabiting adjacent areas of the antenna, will be submitted. This also estimates the protection zone from the frequency and feed power values. Most importantly, the method enables calculations to be performed using different antenna heights and different power levels. A brief discussion of the computational implementation of the propagation model is presented, followed by an example that demonstrates the diagram of the exposure level generated. Comparison with ITU-T 1546-4 propagation model and two ray model are also presented.","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":"131149895","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
Liquid-crystal technology based filters for WDM over plastic optical fibres 基于液晶技术的塑料光纤波分复用滤波器
2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC) Pub Date : 2013-10-28 DOI: 10.1109/IMOC.2013.6646413
D. S. V. Medeiros, R. Ribeiro, A. Barbero, V. N. H. Silva, Kedar Sathaye Daniel Stoenescu, L. Dupont
{"title":"Liquid-crystal technology based filters for WDM over plastic optical fibres","authors":"D. S. V. Medeiros, R. Ribeiro, A. Barbero, V. N. H. Silva, Kedar Sathaye Daniel Stoenescu, L. Dupont","doi":"10.1109/IMOC.2013.6646413","DOIUrl":"https://doi.org/10.1109/IMOC.2013.6646413","url":null,"abstract":"This paper describes the development of notch filters and dichroic beam-splitters, the latter to be a visible 2-channel WDM Multiplexer/Demultiplexer (MUX/DEMUX). Both discrete devices are intended to be used on very short-haul links based on Poly-Methyl-Methacrylate (PMMA) Polymer Optical Fibres (POFs). The devices were firstly developed from commercially available multilayer dielectric stack filters and secondly from engineered Cholesteric Liquid Crystals (CLCs) manufactured by using nematic LC doped with appropriate chiral dopant. In order to have the reflection of above 80% for the desired wavelength and also for non-polarised light approximately 20 layers of CLC with both helicities in a planar Grandjean texture were used. The CLC with left handed helix reflects left circularly polarised light, while the right handed helix reflects the right handed circularly polarised light.","PeriodicalId":395359,"journal":{"name":"2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC)","volume":"40 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":"123991318","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
A triplexer design based on coupled resonators approach for wireless communication 一种基于耦合谐振器的无线通信三工器设计
2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC) Pub Date : 2013-10-28 DOI: 10.1109/IMOC.2013.6646595
Araujo, A., Belfort de Oliveira
{"title":"A triplexer design based on coupled resonators approach for wireless communication","authors":"Araujo, A., Belfort de Oliveira","doi":"10.1109/IMOC.2013.6646595","DOIUrl":"https://doi.org/10.1109/IMOC.2013.6646595","url":null,"abstract":"Design and computer simulation results of a triplexer based on coupled resonator approach are reported in this paper. Six resonators are interconnected in such a way as to yield three outputs with passbands centered at 1.8 GHz, 2.1 GHz and 2.45 GHz covering the GSM, UMTS and IEEE 802.11b wireless bands. Each output presents a Chebyshev ripple level of 0.04321 dB and fractional bandwidth of 2.5 %, 3.3 % and 2.3 % for the left, center and right passbands, respectively . A gradient-based local optimization technique is here utilized to determine the coupling coefficients by minimizing a proposed Cost Function.","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":"123512293","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
Determination of the electromagnetic wave polarization from unknown sources by the method of linear component modified 用线性分量修正法测定未知源的电磁波偏振
2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC) Pub Date : 2013-10-28 DOI: 10.1109/IMOC.2013.6646565
J. Nascimento, F. M. de Assis, A. Serres
{"title":"Determination of the electromagnetic wave polarization from unknown sources by the method of linear component modified","authors":"J. Nascimento, F. M. de Assis, A. Serres","doi":"10.1109/IMOC.2013.6646565","DOIUrl":"https://doi.org/10.1109/IMOC.2013.6646565","url":null,"abstract":"In this paper, we propose a modification of the linear component technique for identification of the electromagnetic waves polarization. The proposed measurement is divided in two setups and is used to obtain the amplitude of the two accessible electric field components of a plane wave. From the axial ratio and the discrete phase information obtained by trial, it is possible to determine the amplitude and phase of the electric field radiated by one or more sources. The setup is constituted by a pair of dipoles orthogonally positioned to determine these two field components. The results are obtained for two kinds of polarization: linear and circular. Good agreement was obtained between the simulated and measured results.","PeriodicalId":395359,"journal":{"name":"2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC)","volume":"19 6","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120851231","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
Evaluation of a novel tubular sample holder for dielectric measurements with Abdulnour's method 用Abdulnour方法评价一种新型管状样品架的介电测量
2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC) Pub Date : 2013-10-28 DOI: 10.1109/IMOC.2013.6646604
A. Rotava, L. E. Borges, M. Dias, Jose C. A. Santos
{"title":"Evaluation of a novel tubular sample holder for dielectric measurements with Abdulnour's method","authors":"A. Rotava, L. E. Borges, M. Dias, Jose C. A. Santos","doi":"10.1109/IMOC.2013.6646604","DOIUrl":"https://doi.org/10.1109/IMOC.2013.6646604","url":null,"abstract":"This paper assesses the accuracy of a rectangular waveguide pierced by a tubular load sample holder for measuring liquid materials at high temperatures with a formulation based on Abdulnour's method. The measurement technique is derived from the transmission line method. The sample holder is adapted from a section of a rectangular waveguide pierced by a tubular load for high temperature measurements at 2.45 GHz. Simulations of the loaded sample holder are carried out with CST Microwave Studio® for several values of sample permittivity. The accuracy of the technique is evaluated by comparing these values to those obtained from Abdulnour's extraction model. It is shown that by properly choosing a set of calibration standards the technique can be quite accurate.","PeriodicalId":395359,"journal":{"name":"2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC)","volume":"144 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":"122548992","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
Regeneration of Bragg gratings in polarization maintaining optical fibers 保偏光纤中Bragg光栅的再生
2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC) Pub Date : 2013-10-28 DOI: 10.1109/IMOC.2013.6646412
I. Abe, V. de Oliveira, H. Kalinowski
{"title":"Regeneration of Bragg gratings in polarization maintaining optical fibers","authors":"I. Abe, V. de Oliveira, H. Kalinowski","doi":"10.1109/IMOC.2013.6646412","DOIUrl":"https://doi.org/10.1109/IMOC.2013.6646412","url":null,"abstract":"We report the formation of thermal regenerated Bragg gratings in different types of polarization maintaining fiber optics. Experimental results about the modification of the polarized reflection bands as a function of the temperature, before and after the grating regeneration, are presented.","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":"128465078","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
Chip-on-carrier microwave mount for semiconductor optical amplifier measurements 用于半导体光放大器测量的载流子微波座
2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC) Pub Date : 2013-10-28 DOI: 10.1109/IMOC.2013.6646415
R. Figueiredo, N. Ribeiro, E. Conforti, C. Gallep
{"title":"Chip-on-carrier microwave mount for semiconductor optical amplifier measurements","authors":"R. Figueiredo, N. Ribeiro, E. Conforti, C. Gallep","doi":"10.1109/IMOC.2013.6646415","DOIUrl":"https://doi.org/10.1109/IMOC.2013.6646415","url":null,"abstract":"The present paper describes a microwave mount (up to 40 GHz) with fiber facility inside an optical table for chip tests. Semiconductor optical amplifier (SOA) switching times of a chip-on-carrier (unpackaged) SOA were tested with rise times below 100 ps. It could be useful for a variety of SOA and photonic devices tests for electro-optical high-speed applications.","PeriodicalId":395359,"journal":{"name":"2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC)","volume":"35 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":"127458387","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
Improving helical antennas using a deep-cut ellipsoidal algorithm 利用深切椭球体算法改进螺旋天线
2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC) Pub Date : 2013-10-28 DOI: 10.1109/IMOC.2013.6646462
J. C. Oliveira, Mucio Paixao, R. Adriano, Elson J. Silva, R. R. Saldanha, A. C. Lisboa
{"title":"Improving helical antennas using a deep-cut ellipsoidal algorithm","authors":"J. C. Oliveira, Mucio Paixao, R. Adriano, Elson J. Silva, R. R. Saldanha, A. C. Lisboa","doi":"10.1109/IMOC.2013.6646462","DOIUrl":"https://doi.org/10.1109/IMOC.2013.6646462","url":null,"abstract":"In this paper, uniform helical antennas are used as starting point to generate optimized non-uniform ones. The improvements in the input impedance and gain are obtained varying the shape of the helix using a second order polynomial function. The optimal polynomial parameters are found using the deep-cut version of the ellipsoidal optimization algorithm. The use of the well known formulae and diagrams for the design of uniform helical antennas as a initial point of the deterministic method can reduce the search domain and provides a fast convergence rate. Results are presented for WiFi application using a center frequency of 2.45 GHz. It shows that the input impedance and the antenna length can be considerably improved using a simple and efficient parametrization.","PeriodicalId":395359,"journal":{"name":"2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC)","volume":"27 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":"121927691","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
A model for ferrite-loaded transversely biased coaxial resonators 铁氧体负载横向偏置同轴谐振器的模型
2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC) Pub Date : 2013-10-28 DOI: 10.1109/IMOC.2013.6646450
Oncel Acar, V. Zhurbenko, T. Johansen
{"title":"A model for ferrite-loaded transversely biased coaxial resonators","authors":"Oncel Acar, V. Zhurbenko, T. Johansen","doi":"10.1109/IMOC.2013.6646450","DOIUrl":"https://doi.org/10.1109/IMOC.2013.6646450","url":null,"abstract":"This work describes a simple model for shortened coaxial cavity resonators with transversely biased ferrite elements. The ferrite allows the resonance frequency to be tuned, and the presented model provides a method of approximately calculating these frequencies to generate the tuning curve in short computation times. A test case resonator is specified, processed by the method, and constructed. Model predictions are compared to the measurement data as well as HFSS simulations. The model is also used for deducing maximum tuneability conditions on resonator parameters.","PeriodicalId":395359,"journal":{"name":"2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC)","volume":"28 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":"121556304","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
Overview of the EC project FLEXIBILITY: Organic and thin-film ICs up to radio frequencies for multifunctional flexible systems EC项目灵活性概述:用于多功能灵活系统的有机和薄膜集成电路高达无线电频率
2013 SBMO/IEEE MTT-S International Microwave & Optoelectronics Conference (IMOC) Pub Date : 2013-10-28 DOI: 10.1109/IMOC.2013.6646609
C. Carta, K. Ishida, B. K. Boroujeni, R. Shabanpour, T. Meister, G. Schmidt, E. Suomalainen, A. Brandlmaier, G. Salvatore, N. Munzenrieder, L. Petti, G. Troster, D. Petrantonakis, D. Kozakis, R. Paradiso, M. Krebs, M. Tuomikoski, H. Egelhaaf, F. Ellinger
{"title":"Overview of the EC project FLEXIBILITY: Organic and thin-film ICs up to radio frequencies for multifunctional flexible systems","authors":"C. Carta, K. Ishida, B. K. Boroujeni, R. Shabanpour, T. Meister, G. Schmidt, E. Suomalainen, A. Brandlmaier, G. Salvatore, N. Munzenrieder, L. Petti, G. Troster, D. Petrantonakis, D. Kozakis, R. Paradiso, M. Krebs, M. Tuomikoski, H. Egelhaaf, F. Ellinger","doi":"10.1109/IMOC.2013.6646609","DOIUrl":"https://doi.org/10.1109/IMOC.2013.6646609","url":null,"abstract":"This paper provides an overview of the research activities within the frame of the European project FLEXIBILITY. The project aims at advancing the competitiveness of Europe in the area of multifunctional, ultra-lightweight, ultra-thin, bendable organic and large area electronics (OLAE). An overview of the technologies available to the consortium is provided, together with details of the performance achieved by the first prototypes. Particular focus is given to the circuit design in technologies compatible with the flexible components and systems. Using a 50 MHz IGZO TFT technology, several circuits have been demonstrated, including a 20 MHz AM demodulator.","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":"122087820","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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