Journal of Microwaves, Optoelectronics and Electromagnetic Applications最新文献_第3页

Determining a Perturbation Factor to Design Tunable Resonant Cavities in SIW Technology 确定微扰因子以设计SIW技术中的可调谐谐振腔

Journal of Microwaves, Optoelectronics and Electromagnetic Applications Pub Date : 2023-03-01 DOI: 10.1590/2179-10742023v22i1268339

R. C. Caleffo, F. S. Correra

{"title":"Determining a Perturbation Factor to Design Tunable Resonant Cavities in SIW Technology","authors":"R. C. Caleffo, F. S. Correra","doi":"10.1590/2179-10742023v22i1268339","DOIUrl":"https://doi.org/10.1590/2179-10742023v22i1268339","url":null,"abstract":"— This paper presents an effective and novel design procedure employing a novelty named as Perturbation Factor to predict the resonance frequency of resonant cavities in SIW technology perturbed by a shape perturbation. The design procedure can be applied in tunable cavities and bandpass filters with shunt reactance of symmetrical inductive window, and regarding the application technologies, rectangular waveguide resonators and resonant cavities in SIW can be employed due to the equivalence of operation between both technologies. Its straightforward application allows a frequency variation of up to 20% using only one metal post which allows the reduction of the fabrication cost and the preservation of the frequency response across the considered bandwidth. To validate the design procedure, two resonant cavities were fabricated, a rectangular resonant cavity designed to operate at 5.0 GHz and 6.0 GHz and a square resonant cavity designed to operate at 6.0 GHz and 7.2 GHz, and frequency variations of 17.74% and 21.81% were obtained for the rectangular and square cavities, respectively. Still regarding the reached results, was verified a mean error of 1.75% for the predicted resonance frequency, which validates the design procedure. The experimental results are in good agreement with the full-wave computational results and electromagnetic theory.","PeriodicalId":53567,"journal":{"name":"Journal of Microwaves, Optoelectronics and Electromagnetic Applications","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42385512","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-Invasive Methodology for Magnetic Characterization of Transformers and Reactors 变压器和电抗器磁特性的无创方法

Journal of Microwaves, Optoelectronics and Electromagnetic Applications Pub Date : 2023-03-01 DOI: 10.1590/2179-10742023v22i1267791

Jônatas P. Américo, J. Leite, Cristian F. Mazzola

引用次数: 0

Double Negative Metamaterial Based on Moebius Strip 基于莫比乌斯带的双负超材料

Journal of Microwaves, Optoelectronics and Electromagnetic Applications Pub Date : 2023-03-01 DOI: 10.1590/2179-10742023v22i1265837

V. Slyusar, I. Sliusar, Sergey Sheleg

{"title":"Double Negative Metamaterial Based on Moebius Strip","authors":"V. Slyusar, I. Sliusar, Sergey Sheleg","doi":"10.1590/2179-10742023v22i1265837","DOIUrl":"https://doi.org/10.1590/2179-10742023v22i1265837","url":null,"abstract":"— The article proposes a new type of metamaterial cells (metacells) based on double Moebius strip. In this research, several design options have been considered which applied the variation of the metamaterial cells design and parameters. For their analysis, the Numerical modeling methods in Ansys EM Suite program were used due to the complexity of describing the interaction of metamaterial cells of non-Euclidean geometry with radio waves. Evaluation and comparison of proposed metacells have been held based on the following characteristics: the electric permittivity and the magnetic permeability as a function of frequency. Results of the researches have demonstrated the possibility of realization of double negative metamaterial (DNG) mode in the metamaterial cells based on the double Moebius strip. The strip width, its thickness, the interstrip gap, as well as the radius of the cylinder within which the metamaterial cell may be enabled, were used as mechanical parameters of the metacells. It is essential that 10-fold and more increase of the dimensions of metamaterial cell would be required for the obtainment of the same possibilities based on the classical split ring resonator (SRR). What concerns the entire scope of the potential ring options from among the considered ones, the ring with the internal area in the form of the Star of David provides the widest transmission band in the low frequency DNG mode. The corresponding area extends up to the transition frequency of 720 MHz. Moreover, the singular ring displays the invariance of the space orientation towards the presence of the DNG mode in low frequency region, when being used as the basis for the metacell.","PeriodicalId":53567,"journal":{"name":"Journal of Microwaves, Optoelectronics and Electromagnetic Applications","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44798626","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

Notched Circular EBG based Circularly Polarized Antenna for Performance Enhancement 基于陷波环形EBG的圆极化天线性能增强

Journal of Microwaves, Optoelectronics and Electromagnetic Applications Pub Date : 2023-03-01 DOI: 10.1590/2179-10742023v22i1265710

A. Verma, S. Patil, Anil Kumar Singh, A. Pandey

{"title":"Notched Circular EBG based Circularly Polarized Antenna for Performance Enhancement","authors":"A. Verma, S. Patil, Anil Kumar Singh, A. Pandey","doi":"10.1590/2179-10742023v22i1265710","DOIUrl":"https://doi.org/10.1590/2179-10742023v22i1265710","url":null,"abstract":"—In this article, a novel Compact Circularly Polarized Antenna with a notched circular Electromagnetic Band Gap (NCEBG) structure is put forward. This proposed structure comprises of a truncated rectangular patch antenna having its ground plane defected by slots etched on it to achieve compactness and wide impedance bandwidth. Electromagnetic Band Gap structures have the attractive feature of in-phase reflection and stopband creation for surface waves, enabling the surface waves to be suppressed; this, in turn, leads to enhanced performance of the antenna when loaded with such structures. For enhancing the functioning of the antenna with regard to its impedance bandwidth, axial ratio bandwidth and gain, seven NCEBG’s are etched on the substrate which surrounds the truncated patch. Additionally, the antenna proposed in this research exhibits compactness with a low profile of 0.473 λo x 0.473 λo x 0.039 λo (λo at center frequency of 7.46GHz represents free space wavelength). The measured outcomes of the prototype-fabricated antenna match well with the results of the simulation, showing 3-dB axial ratio bandwidth of 13.66% and an impedance bandwidth of 73.29% having a peak gain of 7.32dBi in the operating band. The improved functioning of the proposed antenna marks it as a favorable applicant for wireless communication techniques and thus finding its application in various ways.","PeriodicalId":53567,"journal":{"name":"Journal of Microwaves, Optoelectronics and Electromagnetic Applications","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45539448","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

Spectral Analysis of a SPR Sensor based on Multilayer Graphene in the Far Infrared Range 基于多层石墨烯的SPR传感器的远红外光谱分析

Journal of Microwaves, Optoelectronics and Electromagnetic Applications Pub Date : 2023-03-01 DOI: 10.1590/2179-10742023v22i1270773

A. Cruz, Wêndria Cunha, T. Rosso, V. Dmitriev, K. Costa

{"title":"Spectral Analysis of a SPR Sensor based on Multilayer Graphene in the Far Infrared Range","authors":"A. Cruz, Wêndria Cunha, T. Rosso, V. Dmitriev, K. Costa","doi":"10.1590/2179-10742023v22i1270773","DOIUrl":"https://doi.org/10.1590/2179-10742023v22i1270773","url":null,"abstract":"− In this paper, we present a spectral analysis of a Surface Plasmon Resonance (SPR) sensor based on multilayer graphene (MLG) operating as a terahertz refractometer. This device’s structure is based on Kretschmann configuration, and the graphene layers are modeled as surface impedances with conductivity described by the Kubo model. The structure’s electromagnetic response is obtained from the Generalized Coefficients Model, considering TM excitation performed in a frequency range from 1 to 4Thz. In this approach, we evaluate the sensor response for two, three, four and five layers of graphene, equally doped. To verify the effects of MLG doping, we varied the chemical potential by 0.35eV and 0.70eV. As a result, we present the plasmonic response of the device, verifying the operating frequency range for each case of multilayer graphene. In addition, the sensitivity, FWHM and Figure of Merit (FOM) are calculated to describe the sensor performance in each demonstrated case. From the results presented, we verified that the increase in doping reduces the sensitivity of the sensor, however, it improves its FOM. The validation of the proposed model was carried out from simulations in a software based on the Finite Element Method.","PeriodicalId":53567,"journal":{"name":"Journal of Microwaves, Optoelectronics and Electromagnetic Applications","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47398542","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

Performance Analysis of a Distributed Optical Fiber Vibration Sensor Based on a Sagnac Interferometer 基于Sagnac干涉仪的分布式光纤振动传感器的性能分析

Journal of Microwaves, Optoelectronics and Electromagnetic Applications Pub Date : 2023-03-01 DOI: 10.1590/2179-10742023v22i1265391

A. Ozcáriz, G. Weber, D. F. Gomes, I. B. V. Costa, José Rodolfo Galvão, Victor Matheus Martins, D. Pipa, M. J. Silva, J. Silva, C. Zamarreño, C. Martelli

{"title":"Performance Analysis of a Distributed Optical Fiber Vibration Sensor Based on a Sagnac Interferometer","authors":"A. Ozcáriz, G. Weber, D. F. Gomes, I. B. V. Costa, José Rodolfo Galvão, Victor Matheus Martins, D. Pipa, M. J. Silva, J. Silva, C. Zamarreño, C. Martelli","doi":"10.1590/2179-10742023v22i1265391","DOIUrl":"https://doi.org/10.1590/2179-10742023v22i1265391","url":null,"abstract":"— In this work, measuring capabilities of a Sagnac Interferometer-based Distributed Optical Fiber Sensor (DOFS) system are demonstrated by comparing its results to a conventional amplitude-based Distributed Acoustic Sensing (DAS) system. Through a set of three different experiments, it was demonstrated that both sensing systems can detect and locate dynamical deformation along the fiber, in addition to determining its frequency components. The coherent amplitude-based DAS presented a lower background noise. In contrast, even though the Sagnac interferometry-based system presented low-frequency noise in the measurements, it is less susceptible to harmonic distortion for higher amplitude deformations since its sensing principles rely on the measurement of the accumulated phase rather than the amplitude of the backscattered signal purely. Accordingly, the Sagnac interferometry-based system arises as a promising and rather accessible topology for a DOFS implementation","PeriodicalId":53567,"journal":{"name":"Journal of Microwaves, Optoelectronics and Electromagnetic Applications","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43458552","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

Machine Learning-Based Digital Pre-Distortion Scheme for RoF Systems and Experimental 5G mm-waves Fiber-Wireless Implementation 基于机器学习的RoF系统数字预失真方案及5G毫米波光纤无线实现实验

Journal of Microwaves, Optoelectronics and Electromagnetic Applications Pub Date : 2023-03-01 DOI: 10.1590/2179-10742023v22i1270779

L. A. M. Pereira, E. S. Lima, L. Mendes, Arismar Cerqueira S. Jr.

{"title":"Machine Learning-Based Digital Pre-Distortion Scheme for RoF Systems and Experimental 5G mm-waves Fiber-Wireless Implementation","authors":"L. A. M. Pereira, E. S. Lima, L. Mendes, Arismar Cerqueira S. Jr.","doi":"10.1590/2179-10742023v22i1270779","DOIUrl":"https://doi.org/10.1590/2179-10742023v22i1270779","url":null,"abstract":"− The advent of the 5th generation of mobile networks brought a large number of new use case and applications to be supported by the physical layer (PHY), which must be more flexible than all previous radio access networks (RAN). The concept of the centralized RAN (C-RAN) allows all the baseband processing to be performed in the central office, simplifying the network deployment and also allowing the operators to dynamically control the PHY according with the applications requirements. The radio-frequency (RF) signal generated by the C-RAN can be transported to the remote radio unit (RRU) by using a radio over fiber (RoF) system. In this paper, we propose two RoF approaches for composing the transport and access networks of the next-generation systems. The first investigation relies on the implementation of a machine learning-based digital pre-distortion (DPD), designed for RoF systems. In the second approach, we implement an RoF system and characterize the optical and electrical power levels aiming to reduce the RoF non-linear distortions. The overall link performance is evaluated by measuring the error vector magnitude (EVM RMS ) and 590 Mbit/s is achieved with EVM RMS as low as 4.4% in a 10 m reach cell.","PeriodicalId":53567,"journal":{"name":"Journal of Microwaves, Optoelectronics and Electromagnetic Applications","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42313830","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

Implementation of PoF-powered IoT Sensing Systems for Industry 4.0 面向工业4.0的PoF物联网传感系统的实现

Journal of Microwaves, Optoelectronics and Electromagnetic Applications Pub Date : 2023-03-01 DOI: 10.1590/2179-10742023v22i1270780

L. C. Souza, E. S. Lima, E. R. Neto, Arismar Cerqueira Sodré Junior

{"title":"Implementation of PoF-powered IoT Sensing Systems for Industry 4.0","authors":"L. C. Souza, E. S. Lima, E. R. Neto, Arismar Cerqueira Sodré Junior","doi":"10.1590/2179-10742023v22i1270780","DOIUrl":"https://doi.org/10.1590/2179-10742023v22i1270780","url":null,"abstract":"− We propose and experimentally investigate two distinct power-over-Fiber (PoF) approaches, aiming to remotely power Internet-of-Things (IoT) sensing systems for Industry 4.0 environments. The first proof-of-concept is focused on demonstrating a 1-W optical power transmission through a 50-m-fiber-optic link for powering an Arduino Uno, a temperature sensor (DS1820B), and a 433-MHz transceiver (FS1000A). The designed PoF link is able to provide up to 280 mW with power transmission efficiency (PTE) of 28.9%. The second implementation is based on a 100-m PoF link capable of transmitting over 0.6-W optical power and delivering 140-mW electrical power with PTE of 23%. In this scheme, an Arduino Pro Mini, another temperature sensor (LM35), and a 2.4-GHz transceiver (nRF24L01+) are employed. A voltage stability analysis enables to demonstrate that our PoF system is capable of delivering stable output voltage at 8.5 V and 5 V, with only 0.6% and 0.2% voltage fluctuations. In addition, an industrial oven is employed to evaluate the sensor performance considering temperature measurements from both sensing systems. The obtained results demonstrate that PoF might be considered as a","PeriodicalId":53567,"journal":{"name":"Journal of Microwaves, Optoelectronics and Electromagnetic Applications","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48909183","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 Reconfigurable Frequency Selective Surface for Wi-Fi Application 一种用于Wi-Fi应用的可重构频率选择表面

Journal of Microwaves, Optoelectronics and Electromagnetic Applications Pub Date : 2023-03-01 DOI: 10.1590/2179-10742023v22i1260442

Thamyris da Silva Evangelista, D. F. Mamedes, J. C. Silva, A. Serres, A. Gomes Neto

引用次数: 0

Features Extraction for Classification in Switching Devices using Fiber Bragg Grating 基于光纤布拉格光栅的开关器件分类特征提取

Journal of Microwaves, Optoelectronics and Electromagnetic Applications Pub Date : 2023-03-01 DOI: 10.1590/2179-10742023v22i1270775

Daniel Benetti, E. H. Dureck, U. Dreyer, A. Lazzaretti, D. Pipa, J. Silva

引用次数: 1