Pub Date : 2018-09-01DOI: 10.1109/DIPED.2018.8543311
E. Yiğit, K. Sabanci, A. Toktas, Deniz Ustun, Huseyin Duysak
The amount of moisture in stored grain is an important factor which affects food safety and grain quality. A sensible and accurate detection of the moisture content in stored grain is of great significance. In order to detect the grain moisture content non-destructively, the ability of the electromagnetic (EM) wave propagating through the grain can be exploited. While the conventional methods such as capacitive, gravimetric methods are suitable for measuring of moisture of small samples, the EM-based method is more suitable to measure grain moisture of larger samples. In this paper, the wheat moisture ratio is determined by means of A-Scan radar measurement. The radar backscattering signal belongs to air and wheat filled bin are obtained using vector network analyser(VNA) between 1 to 6 GHz for a total of 75 discrete points. The range gating process covering the same interval is performed to both (air and grain measurements) range profiles obtained by taking inverse Fourier transform (IFT) of the A-scan data. Then, the dielectric constant of the wheat is determined using phase information of A-scan data and the grain moisture content is calculated using the dielectric constants of grain, dried grain and water. The wheat moisture ratio is found with 0.6% error compared to actual ratio.
{"title":"Grain Moisture Detection by Using A-Scan Radar Measurement","authors":"E. Yiğit, K. Sabanci, A. Toktas, Deniz Ustun, Huseyin Duysak","doi":"10.1109/DIPED.2018.8543311","DOIUrl":"https://doi.org/10.1109/DIPED.2018.8543311","url":null,"abstract":"The amount of moisture in stored grain is an important factor which affects food safety and grain quality. A sensible and accurate detection of the moisture content in stored grain is of great significance. In order to detect the grain moisture content non-destructively, the ability of the electromagnetic (EM) wave propagating through the grain can be exploited. While the conventional methods such as capacitive, gravimetric methods are suitable for measuring of moisture of small samples, the EM-based method is more suitable to measure grain moisture of larger samples. In this paper, the wheat moisture ratio is determined by means of A-Scan radar measurement. The radar backscattering signal belongs to air and wheat filled bin are obtained using vector network analyser(VNA) between 1 to 6 GHz for a total of 75 discrete points. The range gating process covering the same interval is performed to both (air and grain measurements) range profiles obtained by taking inverse Fourier transform (IFT) of the A-scan data. Then, the dielectric constant of the wheat is determined using phase information of A-scan data and the grain moisture content is calculated using the dielectric constants of grain, dried grain and water. The wheat moisture ratio is found with 0.6% error compared to actual ratio.","PeriodicalId":146873,"journal":{"name":"2018 XXIIIrd International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory (DIPED)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124696866","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}
Pub Date : 2018-09-01DOI: 10.1109/DIPED.2018.8543308
Oleg Kusyy, N. N. Voitovich
The method of obstacle shape reconstruction at its resonant frequencies is extended to the case of body of revolution. The scalar three-dimensional acoustic problem is reduced to a two-dimensional one. Connection between the field on the boundary and far field asymptotic is used for modeling a set of the scattering patterns. Resonant frequencies are defined as the frequencies at which the orthogonal complement function exists. Such a function generates the Herglotz wave function, one of whose zero lines is the boundary contour. The method is tested on several model examples.
{"title":"Shape Reconstruction of Body of Revolution at Resonant Frequencies","authors":"Oleg Kusyy, N. N. Voitovich","doi":"10.1109/DIPED.2018.8543308","DOIUrl":"https://doi.org/10.1109/DIPED.2018.8543308","url":null,"abstract":"The method of obstacle shape reconstruction at its resonant frequencies is extended to the case of body of revolution. The scalar three-dimensional acoustic problem is reduced to a two-dimensional one. Connection between the field on the boundary and far field asymptotic is used for modeling a set of the scattering patterns. Resonant frequencies are defined as the frequencies at which the orthogonal complement function exists. Such a function generates the Herglotz wave function, one of whose zero lines is the boundary contour. The method is tested on several model examples.","PeriodicalId":146873,"journal":{"name":"2018 XXIIIrd International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory (DIPED)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116168374","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}
Pub Date : 2018-09-01DOI: 10.1109/DIPED.2018.8543292
Madhu S. Gupta
This tutorial introduction to the modeling of RF wireless communication channels is aimed at readers in the diffraction and scattering community, who have no background in radio-frequency wireless communication systems. It clarifies the reasoning behind the choice of parameters used in channel modeling, their utility, and their relationship to the physical phenomena taking place within the channel. The distinguishing features of the mm-wave wireless channel, expected to be deployed in future 5G cellular systems, wireless networks, and Internet-of-Things, are briefly summarized, which highlight the need for developing mm-wave channel models.
{"title":"Physical Channel Models for Emerging Wireless Communication Systems","authors":"Madhu S. Gupta","doi":"10.1109/DIPED.2018.8543292","DOIUrl":"https://doi.org/10.1109/DIPED.2018.8543292","url":null,"abstract":"This tutorial introduction to the modeling of RF wireless communication channels is aimed at readers in the diffraction and scattering community, who have no background in radio-frequency wireless communication systems. It clarifies the reasoning behind the choice of parameters used in channel modeling, their utility, and their relationship to the physical phenomena taking place within the channel. The distinguishing features of the mm-wave wireless channel, expected to be deployed in future 5G cellular systems, wireless networks, and Internet-of-Things, are briefly summarized, which highlight the need for developing mm-wave channel models.","PeriodicalId":146873,"journal":{"name":"2018 XXIIIrd International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory (DIPED)","volume":"AES-1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126483488","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}
Pub Date : 2018-09-01DOI: 10.1109/diped.2018.8543271
{"title":"Inverse Problems and Synthesis","authors":"","doi":"10.1109/diped.2018.8543271","DOIUrl":"https://doi.org/10.1109/diped.2018.8543271","url":null,"abstract":"","PeriodicalId":146873,"journal":{"name":"2018 XXIIIrd International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory (DIPED)","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126075970","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}
Pub Date : 2018-09-01DOI: 10.1109/diped.2018.8543289
{"title":"Proceedings of 2018 XXIIIrd International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory (DIPED)","authors":"","doi":"10.1109/diped.2018.8543289","DOIUrl":"https://doi.org/10.1109/diped.2018.8543289","url":null,"abstract":"","PeriodicalId":146873,"journal":{"name":"2018 XXIIIrd International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory (DIPED)","volume":"60 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126955669","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}
Pub Date : 2018-09-01DOI: 10.1109/DIPED.2018.8543283
Sergii V. Dukhopelnykov
We study the problem of the scattering of the H-polarised plane wave by an infinite dielectric rod with a partial graphene cover. The mathematical model is developed based on the boundary hyper-singular integral equation which should be understood in the sense of Hadamard’s finite part. Discretization of the derived integral equation is carried out by the Nystrom-type method, which has a rigorously guaranteed convergence. With the aid of thus obtained discrete model, we plot the dependences of radar cross-section (RCS) and extinction cross-section (ECS) on the frequency, slot size and orientation angle.
{"title":"Control of Backscattering of H-polarized Plane Wave by aCircular Dielectric Rod with Partial Graphene Cover","authors":"Sergii V. Dukhopelnykov","doi":"10.1109/DIPED.2018.8543283","DOIUrl":"https://doi.org/10.1109/DIPED.2018.8543283","url":null,"abstract":"We study the problem of the scattering of the H-polarised plane wave by an infinite dielectric rod with a partial graphene cover. The mathematical model is developed based on the boundary hyper-singular integral equation which should be understood in the sense of Hadamard’s finite part. Discretization of the derived integral equation is carried out by the Nystrom-type method, which has a rigorously guaranteed convergence. With the aid of thus obtained discrete model, we plot the dependences of radar cross-section (RCS) and extinction cross-section (ECS) on the frequency, slot size and orientation angle.","PeriodicalId":146873,"journal":{"name":"2018 XXIIIrd International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory (DIPED)","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123665327","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}
Pub Date : 2018-09-01DOI: 10.1109/DIPED.2018.8543286
O. Stankevych
The elastic bi-material composed of a half-space with penny-shaped mode III crack and a layer is considered. The functions of the crack-opening-displacement are set in a time-harmonic law. The problem of determination of the wave displacement field is solved by the boundary integral equation method (BIEM). The solutions are selected in the form of Helmholtz potentials. The integral representation of the displacements on the body surface is obtained. The effect of the oscillations frequency, the ratio of elastic constant parameters of the bimaterial, the thickness of the layer and the defect depth on the amplitude of the displacements are investigated.
{"title":"Wave Displacement Field on an Elastic Bi-material Surface due to a Mode III Crack Opening","authors":"O. Stankevych","doi":"10.1109/DIPED.2018.8543286","DOIUrl":"https://doi.org/10.1109/DIPED.2018.8543286","url":null,"abstract":"The elastic bi-material composed of a half-space with penny-shaped mode III crack and a layer is considered. The functions of the crack-opening-displacement are set in a time-harmonic law. The problem of determination of the wave displacement field is solved by the boundary integral equation method (BIEM). The solutions are selected in the form of Helmholtz potentials. The integral representation of the displacements on the body surface is obtained. The effect of the oscillations frequency, the ratio of elastic constant parameters of the bimaterial, the thickness of the layer and the defect depth on the amplitude of the displacements are investigated.","PeriodicalId":146873,"journal":{"name":"2018 XXIIIrd International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory (DIPED)","volume":"12 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125987836","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}
Pub Date : 2018-09-01DOI: 10.1109/DIPED.2018.8543313
Dariia O. Yevtushenko
The optical diffraction radiation that accompanies the motion of a modulated beam of electrons near a silver nanowire scatterer is investigated in the two-dimensional formulation. Our goal is to compute the field in the near and far zones and analyze how it depends on electron beam parameters. We demonstrate the excitation of plasmon resonances of such a nanoscale scatterer that can be used in the design of optical range non-invasive beam position monitors.
{"title":"Optical Diffraction Radiation of a Beam of Particles Flowing Near a Circular Silver Nanowire","authors":"Dariia O. Yevtushenko","doi":"10.1109/DIPED.2018.8543313","DOIUrl":"https://doi.org/10.1109/DIPED.2018.8543313","url":null,"abstract":"The optical diffraction radiation that accompanies the motion of a modulated beam of electrons near a silver nanowire scatterer is investigated in the two-dimensional formulation. Our goal is to compute the field in the near and far zones and analyze how it depends on electron beam parameters. We demonstrate the excitation of plasmon resonances of such a nanoscale scatterer that can be used in the design of optical range non-invasive beam position monitors.","PeriodicalId":146873,"journal":{"name":"2018 XXIIIrd International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory (DIPED)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126062573","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}
Pub Date : 2018-09-01DOI: 10.1002/9780470294178.CH3
P. Jarry, J. Beneat
This chapter contains sections titled: Introduction Rectangular Waveguides and Cavities Circular Waveguides and Cavities Evanescent Modes Planar Transmission Lines Distributed Circuits Conclusions References
本章包含以下章节:介绍矩形波导和空腔圆波导和空腔倏逝模式平面传输线分布电路结论参考文献
{"title":"Waveguides and Transmission Lines","authors":"P. Jarry, J. Beneat","doi":"10.1002/9780470294178.CH3","DOIUrl":"https://doi.org/10.1002/9780470294178.CH3","url":null,"abstract":"This chapter contains sections titled: Introduction Rectangular Waveguides and Cavities Circular Waveguides and Cavities Evanescent Modes Planar Transmission Lines Distributed Circuits Conclusions References","PeriodicalId":146873,"journal":{"name":"2018 XXIIIrd International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory (DIPED)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114889794","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}
Pub Date : 2018-09-01DOI: 10.1109/DIPED.2018.8543324
V. Barbakadze, V. Tabatadze, I. Petoev, R. Zaridze
The goal of proposed research is to construct the circular polarized narrow-band directed antenna using low-loss dielectric and high relative permittivity material for the substrate. Presented first part contains the simulation of such antenna using the software which based on Finite Element Method for the purpose to fined optimal parameters of such antenna before its construction. Using numerical experiment we suppose to determine best parameters of antenna, to achieve desired radiation parameters: well matched to the open space; circular polarization of radiated field; narrow-beam; wide-ban. It was designed 2.49 GHz and 2.4 GHz circular polarization radiation patch antennas, which was archived by cutting edges from square patch antenna. For simulation it was used 6.8 relative permittivity material for the substrate.
{"title":"Directed Circular Polarized Antenna","authors":"V. Barbakadze, V. Tabatadze, I. Petoev, R. Zaridze","doi":"10.1109/DIPED.2018.8543324","DOIUrl":"https://doi.org/10.1109/DIPED.2018.8543324","url":null,"abstract":"The goal of proposed research is to construct the circular polarized narrow-band directed antenna using low-loss dielectric and high relative permittivity material for the substrate. Presented first part contains the simulation of such antenna using the software which based on Finite Element Method for the purpose to fined optimal parameters of such antenna before its construction. Using numerical experiment we suppose to determine best parameters of antenna, to achieve desired radiation parameters: well matched to the open space; circular polarization of radiated field; narrow-beam; wide-ban. It was designed 2.49 GHz and 2.4 GHz circular polarization radiation patch antennas, which was archived by cutting edges from square patch antenna. For simulation it was used 6.8 relative permittivity material for the substrate.","PeriodicalId":146873,"journal":{"name":"2018 XXIIIrd International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory (DIPED)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131076968","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：