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2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)最新文献

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High accuracy hot spot size estimation technique for Raman Distributed Temperature Sensors 拉曼分布式温度传感器的高精度热点尺寸估计技术
2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2019-11-10 DOI: 10.1109/IMOC43827.2019.9317584
Luís C. B. Silva, C. E. Castellani, M. Segatto, M. Pontes
{"title":"High accuracy hot spot size estimation technique for Raman Distributed Temperature Sensors","authors":"Luís C. B. Silva, C. E. Castellani, M. Segatto, M. Pontes","doi":"10.1109/IMOC43827.2019.9317584","DOIUrl":"https://doi.org/10.1109/IMOC43827.2019.9317584","url":null,"abstract":"We report in this work for the first time, to the best of the author’s knowledge, an approach that allows to accurately determine directly from the sensor response the hot spot size in Raman Distributed Temperature Sensors. Our method applies a linear regression model to the full width at half maximum response based on the correlation between the spatial and temperature measurements of the sensor. Measurements of hot spot sizes of only 5 cm were achieved with 98% precision for a commercial sensor with spatial resolution of 1 m. Moreover, for hot spots shorter than the sensor resolution this technique also allows improvements in the average accuracy of temperature measurements by up to 86%.","PeriodicalId":175865,"journal":{"name":"2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125616210","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
Microwave Interference Techniques for Frequency Measurement and Filters 微波干扰技术的频率测量和滤波器
2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2019-11-10 DOI: 10.1109/IMOC43827.2019.9317617
C. P. do N. Silva, I. Llamas-Garro, R. Gómez‐García, Jung-Mu Kim, M. T. de Melo
{"title":"Microwave Interference Techniques for Frequency Measurement and Filters","authors":"C. P. do N. Silva, I. Llamas-Garro, R. Gómez‐García, Jung-Mu Kim, M. T. de Melo","doi":"10.1109/IMOC43827.2019.9317617","DOIUrl":"https://doi.org/10.1109/IMOC43827.2019.9317617","url":null,"abstract":"This paper reviews the application of microwave signal-interference techniques to interferometers for frequency measurement and filters. The microwave interference takes place when the input-signal components pass through two different electrical paths to be then recombined and produce an interference pattern. Path lengths define the interference-based power-transmission maximum and minimum, which are calculated to obtain the desired device frequency response. Reconfigurable interferometers, wide-band, and dual-band filters designed using interference principles are described in this overview paper.","PeriodicalId":175865,"journal":{"name":"2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126239747","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
Fiber Bragg Gratings Sensors on Sutural Expansion Assessment: a Pilot Study 光纤光栅传感器在结构膨胀评估中的初步研究
2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2019-11-10 DOI: 10.1109/IMOC43827.2019.9317653
Wagner Coimbra, Vinícius Campo, P. Oliveira, A. Frizera, R. Andrade, A. Leal-Junior
{"title":"Fiber Bragg Gratings Sensors on Sutural Expansion Assessment: a Pilot Study","authors":"Wagner Coimbra, Vinícius Campo, P. Oliveira, A. Frizera, R. Andrade, A. Leal-Junior","doi":"10.1109/IMOC43827.2019.9317653","DOIUrl":"https://doi.org/10.1109/IMOC43827.2019.9317653","url":null,"abstract":"Applications of fiber Bragg grating (FBG) sensors have been developed in many fields due to their properties, which allow versatility and crucial advantages over traditional measuring methods, e.g. biocompatibility, immunity to electromagnetic fields and multiplexing capability. Aiming at these advantages, this paper presents the application of FBG sensors on orthodontic strain measurements. Two FBGs are positioned on the anterior and posterior regions of a rapid palatal expansion (RPE) appliance with tooth-borne connection (Hyrax). Results show the feasibility of the proposed approach, where the FBGs were able to measure the sutural expansion in both anterior and posterior region at 20 activations of the Hyrax.","PeriodicalId":175865,"journal":{"name":"2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126703640","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
Optimization of Shaped Log-Periodic Antennas 异形对数周期天线的优化设计
2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2019-11-10 DOI: 10.1109/IMOC43827.2019.9317677
Paulo Victor Barreto Tomé, M. Terada
{"title":"Optimization of Shaped Log-Periodic Antennas","authors":"Paulo Victor Barreto Tomé, M. Terada","doi":"10.1109/IMOC43827.2019.9317677","DOIUrl":"https://doi.org/10.1109/IMOC43827.2019.9317677","url":null,"abstract":"Wire antennas have been widely used in the past in TV communication systems, and more recently have experienced a recrudescence in their popularity and R& D interest with the digitalization of television signals. Dipoles, Yagis and Log-Periodics are common examples of wire antennas and possess ideal lengths and geometries accordingly to the desired TV channels. In this work, a new shape for a Log-Periodic antenna is numerically obtained through angular optimization with the aid of computer codes. The new geometry yields a better response in a desired frequency bandwidth, when compared to the classical straight or V-shaped geometries.","PeriodicalId":175865,"journal":{"name":"2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"125 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123656195","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
A Non-destructive Inspection of Anchor Rods based on Frequency Domain Reflectometry 基于频域反射法的锚杆无损检测
2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2019-11-10 DOI: 10.1109/IMOC43827.2019.9317679
M. M. Alves, M. T. de Melo, H. L. Lott Neto, L. L. Lourenço Novo, L. D. de Medeiros, P. Gama, M. S. Coutinho, D. Barbosa, Vinícius L. Tarragôz
{"title":"A Non-destructive Inspection of Anchor Rods based on Frequency Domain Reflectometry","authors":"M. M. Alves, M. T. de Melo, H. L. Lott Neto, L. L. Lourenço Novo, L. D. de Medeiros, P. Gama, M. S. Coutinho, D. Barbosa, Vinícius L. Tarragôz","doi":"10.1109/IMOC43827.2019.9317679","DOIUrl":"https://doi.org/10.1109/IMOC43827.2019.9317679","url":null,"abstract":"Anchor rods are used to fix the guy cables of transmission towers into the soil. Thus, anchor rods are buried or encapsulated in concrete beneath the ground, thereby forming a reliable support system. However, incomplete or imperfect anchor grouting often occurs during construction, which may cause the anchor to become ineffective and lead to engineering accidents. Therefore, such anchors require periodic maintenance. Frequency domain reflectometry is used to locate and quantize possible deterioration on the concrete anchors. Experimental results have shown that the reflectometry approach may be a new method for the noninvasive maintenance of anchor rods measuring one meter.","PeriodicalId":175865,"journal":{"name":"2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121864364","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
Design of a Patch Antenna Array for Downlink Rotorcraft System 下行旋翼机系统贴片天线阵列设计
2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2019-11-10 DOI: 10.1109/IMOC43827.2019.9317629
Giordana Maria Rodrigues, D. Spadoti, J. Ribeiro
{"title":"Design of a Patch Antenna Array for Downlink Rotorcraft System","authors":"Giordana Maria Rodrigues, D. Spadoti, J. Ribeiro","doi":"10.1109/IMOC43827.2019.9317629","DOIUrl":"https://doi.org/10.1109/IMOC43827.2019.9317629","url":null,"abstract":"Rotorcraft are widely used in downlink missions in order to transmit and to capture images for base stations. Traditional dipoles antennas have been used, nevertheless the sitting process faces limitations, due to lack of location. Therefore, this paper presents a microstrip antenna array operating in 5 GHz frequency as an alternative solution to be used in rotorcraft downlink missions. The proposed antenna array, composed by four antennas, was manufactured using low profile printed one and a coaxial feed system. The analysis comprised theoretical calculations, simulations, and a validation through test measurements on a representative vertical tail reduced model, inside a semi anechoic camera. The design results obtained for antenna array constructed on a substrate with relative permittivity $varepsilon_{r}=2.2$ presented a gain of 7.25 dBi and a better reflection coefficient of -18.5 dB at the design frequency. For a reflection coefficient better than -10 dB a 154.8 MHz bandwidth was obtained.","PeriodicalId":175865,"journal":{"name":"2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125662598","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
Simulation and Performance of a Fractal Microstrip Antenna on the Influence of EBG to ISM Band Application 分形微带天线的仿真与性能研究EBG对ISM波段应用的影响
2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2019-11-10 DOI: 10.1109/IMOC43827.2019.9317616
H. E. A. C. Branco, H. D. de Andrade, José Lucas da Silva Paiva, G. Fontgalland, Idalmir de Souza Queiroz Júnior, M. Sousa
{"title":"Simulation and Performance of a Fractal Microstrip Antenna on the Influence of EBG to ISM Band Application","authors":"H. E. A. C. Branco, H. D. de Andrade, José Lucas da Silva Paiva, G. Fontgalland, Idalmir de Souza Queiroz Júnior, M. Sousa","doi":"10.1109/IMOC43827.2019.9317616","DOIUrl":"https://doi.org/10.1109/IMOC43827.2019.9317616","url":null,"abstract":"in this paper, the project of a fractal antenna is proposed, based on the Cantor sequence in microstrip antenna operating at the projected central frequency at 2.45 GHz and application in ISM Band 2.4 GHz. The use of fractal geometry implies miniaturizing the physical dimensions of the antenna without altering its bandwidth or gain, and to enhance these characteristics it’s proposed to insert structures EBG (Electromagnetic Bandgap). Simulations were carried out with the HFSSO (High Frequency Structural Simulator), to obtain radiation pattern, reflection coefficient, bandwidth, gain and axial ratio. The methods presented in this paper were validated for the development of the radiation parameters, being the device that resulted the best impedance matching with reflection coefficient at -31dB, was the structure EBG 8x8 spaced at 6mm distance to reference antenna.","PeriodicalId":175865,"journal":{"name":"2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128287325","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 New Design of Sierpinski Curve Fractal FSS for S-band Interference Protection Applications 用于s波段干扰保护的Sierpinski曲线分形FSS的新设计
2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2019-11-10 DOI: 10.1109/IMOC43827.2019.9317417
P. H. B. Cavalcanti Filho, J. A. Araujo, M. D. de Oliveira, M. T. de Melo, A. Neto, I. B. G. Coutinho
{"title":"A New Design of Sierpinski Curve Fractal FSS for S-band Interference Protection Applications","authors":"P. H. B. Cavalcanti Filho, J. A. Araujo, M. D. de Oliveira, M. T. de Melo, A. Neto, I. B. G. Coutinho","doi":"10.1109/IMOC43827.2019.9317417","DOIUrl":"https://doi.org/10.1109/IMOC43827.2019.9317417","url":null,"abstract":"This work presents a Frequency Selective Surface (FSS) based on a fractal geometry for radar systems applications. The third iteration of Sierpinski curve is used to design the FSS. The Sierpinski curve has a space-filling propriety to miniaturize the FSS. The device presents a dualpolarized behavior and two stop-band response at 1.82 GHz and 4.79 GHz, which are suitable for interference protection applications. The L and C bands signals are filtered avoiding eventual adjacent interference to S band frequency. Additionally, an investigation is performed for different polarized wave incidence. The simulation frequency responses are performed using ANSYS HFSS software. The simulation and measurement results are shown and compared for validation purposes.","PeriodicalId":175865,"journal":{"name":"2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123341864","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
Scattering by a PEC Wedge in a Standard Atmosphere: a Modified Two-Ray Model Versus a SSPE Algorithm 标准大气中PEC楔形物的散射:一种改进的双射线模型与SSPE算法
2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2019-11-10 DOI: 10.1109/IMOC43827.2019.9317678
D. Parada, C. Rego, Juliana M. Mendes, D. Guevara, Ronald Daza, G. Ramos
{"title":"Scattering by a PEC Wedge in a Standard Atmosphere: a Modified Two-Ray Model Versus a SSPE Algorithm","authors":"D. Parada, C. Rego, Juliana M. Mendes, D. Guevara, Ronald Daza, G. Ramos","doi":"10.1109/IMOC43827.2019.9317678","DOIUrl":"https://doi.org/10.1109/IMOC43827.2019.9317678","url":null,"abstract":"This work presents a modified two-ray model unified with Uniform Theory of Diffraction (UTD) emphasizing the diffraction effects on a wedge and atmospheric effects. To validate the proposed formulation, a comparison between the modified two-ray model and the Split Step Parabolic Equation (SSPE) algorithm is made for a problem of a perfectly conducting wedge and standard atmosphere conditions at 2 GHz. The modified two-ray model showed similar behavior for pathloss results, compared to the SSPE numerical solution.","PeriodicalId":175865,"journal":{"name":"2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130971396","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
CMOS Reconfigurable Dual-Band Low Noise Amplifier for eMTC Receiver 用于eMTC接收机的CMOS可重构双带低噪声放大器
2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC) Pub Date : 2019-11-10 DOI: 10.1109/IMOC43827.2019.9317634
Xin Chen, Xiangning Fan, Jing Feng
{"title":"CMOS Reconfigurable Dual-Band Low Noise Amplifier for eMTC Receiver","authors":"Xin Chen, Xiangning Fan, Jing Feng","doi":"10.1109/IMOC43827.2019.9317634","DOIUrl":"https://doi.org/10.1109/IMOC43827.2019.9317634","url":null,"abstract":"This paper presents a low power dual-band low noise amplifier (LNA) targeting for GSM and LTE standard, designed for eMTC receiver. Selections of parallel cascade amplifiers, switching input inductors and loads are used for reconfigurable wireless bands and gain control in this LNA operating at 0.9/1.9 GHz. Simultaneously, switching source inductors are used because of the different input impedance of dual bands far apart. The maximum power gain is from 18.4 to 19.2 dB between dual bands with controlled range of over 12dB. The noise Figure (NF) is 1.57/1.68 dB at 0.9/1.9 GHz bands, respectively. This LNA achieves the IIP3 of -5.9/-4.3 dBm while consuming an average power of 7mW (without buffer) with the highest gain at two different frequencies. The proposed reconfigurable LNA is designed in 65nm CMOS process from 1.2V supply.","PeriodicalId":175865,"journal":{"name":"2019 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference (IMOC)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129419917","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
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