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

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Electromagnetic modeling of wave propagation in curved boreholes for geophysical exploration 地球物理勘探中弯曲钻孔波传播的电磁模拟
2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2017-08-01 DOI: 10.1109/IMOC.2017.8121066
Guilherme S. Rosa, J. Bergmann, F. Teixeira
{"title":"Electromagnetic modeling of wave propagation in curved boreholes for geophysical exploration","authors":"Guilherme S. Rosa, J. Bergmann, F. Teixeira","doi":"10.1109/IMOC.2017.8121066","DOIUrl":"https://doi.org/10.1109/IMOC.2017.8121066","url":null,"abstract":"Logging-while-drilling (LWD) tools are routinely used to guide well placement during exploration of hydrocarbons reservoirs. Recent advances in the drilling technologies have allowed real-time proactive geosteering of the drilling direction to steer to a precise target zone. Electromagnetic modeling of LWD sensors in complex geometries is a challenging task to conventional computational electromagnetics (CEM). In particular, several complications arise due the non-conformal boundaries present in this problem. In this paper we present a pseudoanalytical formulation to handle the electromagnetic wave propagation inside radially-stratified and axially-toroidal structures that could be used as an efficient CEM method for modeling LWD tools inside directional boreholes. Preliminary results demonstrate that our method can accurately analyze LWD sensors in typical directional wells.","PeriodicalId":171284,"journal":{"name":"2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"56 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":"115404658","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
3D thermal simulations and modeling of multi-finger InP DHBTs for millimeter-wave power amplifiers 毫米波功率放大器用多指InP dhbt的三维热仿真与建模
2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2017-08-01 DOI: 10.1109/IMOC.2017.8121069
V. Midili, V. Nodjiadjim, T. Johansen, M. Riet, M. Squartecchia, J. Dupuy, A. Konczykowska
{"title":"3D thermal simulations and modeling of multi-finger InP DHBTs for millimeter-wave power amplifiers","authors":"V. Midili, V. Nodjiadjim, T. Johansen, M. Riet, M. Squartecchia, J. Dupuy, A. Konczykowska","doi":"10.1109/IMOC.2017.8121069","DOIUrl":"https://doi.org/10.1109/IMOC.2017.8121069","url":null,"abstract":"This paper presents the comparison between the simulated and measured thermal resistance of InP Double Heterojunction Bipolar Transistors (DHBT). 3D thermal simulations were carried out in order to compute the temperature distribution across the full structure due to a constant power excitation of devices with up to 8 emitter fingers. The surface temperature profile was then used to compute the average thermal resistance of the multi-finger devices. The comparison with the corresponding results obtained by electrical measurements show a good agreement. The temperature profiles from several simulations are used to extract the thermal resistance matrix used in the electro-thermal coupling network of a compact large-signal model.","PeriodicalId":171284,"journal":{"name":"2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"363 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":"122828058","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
Quadrature frontend with directional coupler for RF reflection coefficient measurements 带方向耦合器的正交前端，用于射频反射系数测量
2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2017-08-01 DOI: 10.1109/IMOC.2017.8121102
V. Kible, K. B. de Brito, R. N. de Lima
{"title":"Quadrature frontend with directional coupler for RF reflection coefficient measurements","authors":"V. Kible, K. B. de Brito, R. N. de Lima","doi":"10.1109/IMOC.2017.8121102","DOIUrl":"https://doi.org/10.1109/IMOC.2017.8121102","url":null,"abstract":"A Cartesian approach reflection coefficient measurement block based on a directional coupler and four quadrature mixers is presented in this work. The block was designed for use in an automatic impedance matching system in the ultra-high frequency range. Simulations, including parasitics, resulted in an average error of 3.4% full-scale and indicate a high potential of the approach for an implementation in integrated circuit technology. Measurements on a discrete setup demonstrate a maximum error of 28% full-scale and prove the usefulness of the approach.","PeriodicalId":171284,"journal":{"name":"2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"305 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":"116220187","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
Mode characteristics of a D-shaped porous fiber with a thin gold layer in the THz regime 含薄金层的d型多孔光纤在太赫兹波段的模式特性
2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2017-08-01 DOI: 10.1109/IMOC.2017.8121084
M. P. Cardoso, P. Gaia, J. C. Costa, Anderson O. Silva
{"title":"Mode characteristics of a D-shaped porous fiber with a thin gold layer in the THz regime","authors":"M. P. Cardoso, P. Gaia, J. C. Costa, Anderson O. Silva","doi":"10.1109/IMOC.2017.8121084","DOIUrl":"https://doi.org/10.1109/IMOC.2017.8121084","url":null,"abstract":"In this work, we carry out theoretically the mode analysis of a D-shaped porous fiber with a thin gold layer in the THz spectral range. From a proper design of the gold layer, effective losses can be reduced and a zero waveguide dispersion is achieved as the result of the coupling between the fiber modes and surface plasmons. We argue that the reached guidance features can be used to implement in the THz spectrum an analog version of SPR (surface plasmon resonance) D-type optical fibers.","PeriodicalId":171284,"journal":{"name":"2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"51 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":"126462797","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
On-chip patch antenna on InP substrate for short-range wireless communication at 140 GHz 用于140 GHz短距离无线通信的InP衬底片上贴片天线
2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2017-08-01 DOI: 10.1109/IMOC.2017.8121032
Yunfeng Dong, T. Johansen, V. Zhurbenko
{"title":"On-chip patch antenna on InP substrate for short-range wireless communication at 140 GHz","authors":"Yunfeng Dong, T. Johansen, V. Zhurbenko","doi":"10.1109/IMOC.2017.8121032","DOIUrl":"https://doi.org/10.1109/IMOC.2017.8121032","url":null,"abstract":"This paper presents the design of an on-chip patch antenna on indium phosphide (InP) substrate for short-range wireless communication at 140 GHz. The antenna shows a simulated gain of 5.3 dBi with 23% bandwidth at 140 GHz and it can be used for either direct chip-to-chip communication or chip-level integration and packaging. In the transmission frequency band from 130 GHz to 150 GHz the estimated in-band gain variation is 0.5 dBi which guarantees gain uniformity. The antenna with optimized dimension is implemented for a transition between elevated coplanar waveguide (ECPW) and rectangular waveguide. The chip-to-waveguide transition in back-to-back configuration exhibits a simulated return loss of 10 dB and insertion loss of 3 dB from 128 GHz to 153 GHz. For higher directivity, a horn antenna is used together with the chip-to-waveguide transition forming an extended packaging structure that is suitable for the transceiver (Tx and Rx) chips. The simulated gain of the extended packaging structure is 11.9 dBi with 23% bandwidth at 140 GHz and the in-band gain variation is 2 dBi.","PeriodicalId":171284,"journal":{"name":"2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"28 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":"128093436","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
Properties of bulk dental composites using fiber Bragg grating sensors 基于光纤光栅传感器的大块牙科复合材料性能研究
2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2017-08-01 DOI: 10.1109/IMOC.2017.8121085
A. P. G. de Oliveira Franco, C. C. de Moura, L. Z. Karam, H. Kalinowski
{"title":"Properties of bulk dental composites using fiber Bragg grating sensors","authors":"A. P. G. de Oliveira Franco, C. C. de Moura, L. Z. Karam, H. Kalinowski","doi":"10.1109/IMOC.2017.8121085","DOIUrl":"https://doi.org/10.1109/IMOC.2017.8121085","url":null,"abstract":"The technique recommended to achieve adhesion of composites to the enamel and dentine in dentistry is incremental with gradual photo-activation. Bulk fill composites were developed to reduce the clinical time and shrinkage polymerization. There are two types of bulk fill composites according the viscosity. The present study evaluates the shrinkage and temperature change during the polymerization of a bulk fill composite of low viscosity inside a teeth cavity, prepared to replace teeth tissue lost by caries and fractures. Fiber Bragg grating sensors are used in this investigation due their great sensibility and small dimensions. The results reveal shrinkage polymerization of −863±168 με and temperature change of 12±7°C. The temperature variationis high and can compromise the pulp vitality.","PeriodicalId":171284,"journal":{"name":"2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"12 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":"133732912","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
Circularly symmetric frozen waves and their optical forces in optical tweezers using a ray optics approach 使用射线光学方法的光镊中的圆对称冻结波及其光力
2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2017-08-01 DOI: 10.1109/IMOC.2017.8121168
Amélia Moreira Santos, Pedro Paulo Justino da Silva Arantes, L. Ambrosio
{"title":"Circularly symmetric frozen waves and their optical forces in optical tweezers using a ray optics approach","authors":"Amélia Moreira Santos, Pedro Paulo Justino da Silva Arantes, L. Ambrosio","doi":"10.1109/IMOC.2017.8121168","DOIUrl":"https://doi.org/10.1109/IMOC.2017.8121168","url":null,"abstract":"In this work we analyze, in the ray optics regime, the optical forces exerted on micro-sized dielectric spheres due to optical beams created as suitable discrete superpositions of scalar and vector Bessel beams — also known as frozen waves, thus envisioning applications in optical tweezers. Scalar frozen waves have been recently and theoretically introduced as auxiliary optical fields in the trapping and manipulation of neutral particles paper in both the Rayleigh (dipole) and the Mie regimes, the latter demanding a full electromagnetic treatment. Here, the extension of previous studies is twofold in the sense that we perform investigations both in the ray optics regime, which has only been previously considered in terms of simplistic models, and in terms of a vector approach which allows us to go beyond the paraxial approximation.","PeriodicalId":171284,"journal":{"name":"2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"364 9","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134426069","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
A novel complementary frequency selective surface for satellite communication 一种新型卫星通信互补频率选择面
2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2017-08-01 DOI: 10.1109/IMOC.2017.8121031
Bruno Sátiro da Silva, A. Campos
{"title":"A novel complementary frequency selective surface for satellite communication","authors":"Bruno Sátiro da Silva, A. Campos","doi":"10.1109/IMOC.2017.8121031","DOIUrl":"https://doi.org/10.1109/IMOC.2017.8121031","url":null,"abstract":"In this paper we present an analysis of the properties and applicability of the complementary frequency selective surfaces (CFSS), which have multiband behavior and great angular stability as main characteristics. Computational simulations are done by proposing a new design CFSS for satellite communication with dual-passband response and angular stability considering a wide range of angles of incidence. Parametric analyzes and discussion of results finalize this study.","PeriodicalId":171284,"journal":{"name":"2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"94 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":"133156645","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
Offline measurements of photonic devices 光子器件的离线测量
2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2017-08-01 DOI: 10.1109/IMOC.2017.8121156
E. Conforti, T. Sutili
{"title":"Offline measurements of photonic devices","authors":"E. Conforti, T. Sutili","doi":"10.1109/IMOC.2017.8121156","DOIUrl":"https://doi.org/10.1109/IMOC.2017.8121156","url":null,"abstract":"Performances of microwave photonics devices are evaluated using offline techniques following the appropriate experiments. First, the harmonic distortion and the half-wave voltage of an electro-optical modulator are obtained for the entire bandwidth using opposite phase sinusoidal signals. Then, phase noise, electromagnetic emission behavior, and linewidth of several semiconductor lasers are characterized using heterodyne reception. Both offline analyses employ fast digital signal acquisition and processing.","PeriodicalId":171284,"journal":{"name":"2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"25 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":"123888781","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
Operation analysis of a novel concept of RF source known as gyromagnetic line 一种新概念射频源的工作分析，称为回旋磁力线
2017 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2017-08-01 DOI: 10.1109/IMOC.2017.8121122
J. O. Rossi, F. S. Yamasaki, E. Schamiloglu, J. Barroso, U. Hasar
{"title":"Operation analysis of a novel concept of RF source known as gyromagnetic line","authors":"J. O. Rossi, F. S. Yamasaki, E. Schamiloglu, J. Barroso, U. Hasar","doi":"10.1109/IMOC.2017.8121122","DOIUrl":"https://doi.org/10.1109/IMOC.2017.8121122","url":null,"abstract":"Gyromagnetic nonlinear transmission lines are interesting new devices used for RF generation since they are all solid state, lightweight and compact, neither requiring vacuum nor thermionic filament as in electronic tubes. Experiments with these lines have demonstrated their successful operation at L and S bands, thereby enabling them for applications in UWB pulsed radars in space vehicles and defense systems. There is also a great interest in compact solid-state high-power microwave sources for applications in small defense platforms (boats, trucks, etc.) to destroy the enemy electronic systems. Although the operation of these devices has been demonstrated exhaustively in recent years, their working principle is not quite well understood so far as it has been expected that the precession of the magnetic dipoles in the ferrite material given by the Larmor frequency, which predicts a proportional increase with the magnetic field bias. However, as observed experimentally the opposite occurs and the frequency decreases with the increasing of the magnetic field applied. Thus, the objective of this paper is to address this problem using the Landau-Lifshitz-Gilbert (LLG) equation with boundary conditions on the TEM mode propagation in the coaxial line. The formulation obtained for the precession frequency will be used to compare with experimental data found in the literature.","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":"115870091","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
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