Pub Date : 2018-07-01DOI: 10.1109/MMET.2018.8460326
D. Yudina, L. Ivzhenko
The manuscript is devoted to experimental and numerical calculation analysis of the spectral properties of an anisotropic wire medium (wire photonic crystal) with embedded spatial defect in microwaves. The spatial distribution of the electromagnetic field in the defect region is experimentally detected. A good agreement between theoretical calculations and experimental measurements is shown. The obtained experimental results can be applied for various areas in Communications: directional couplers, high pass filters, attenuators, etc.
{"title":"Experimental and Numerical Identification of the Defect Modes in 2D Wire Photonic Crystal","authors":"D. Yudina, L. Ivzhenko","doi":"10.1109/MMET.2018.8460326","DOIUrl":"https://doi.org/10.1109/MMET.2018.8460326","url":null,"abstract":"The manuscript is devoted to experimental and numerical calculation analysis of the spectral properties of an anisotropic wire medium (wire photonic crystal) with embedded spatial defect in microwaves. The spatial distribution of the electromagnetic field in the defect region is experimentally detected. A good agreement between theoretical calculations and experimental measurements is shown. The obtained experimental results can be applied for various areas in Communications: directional couplers, high pass filters, attenuators, etc.","PeriodicalId":343933,"journal":{"name":"2018 IEEE 17th International Conference on Mathematical Methods in Electromagnetic Theory (MMET)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129481442","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 : 2018-07-01DOI: 10.1109/MMET.2018.8460432
A. Popov, M. Bortsova
The paper presents the results of field experimental research of polarization properties of the signals backscattered by metal objects of various configurations against the background of mountain ranges. It is shown that the remote sensing objects polarization transfer functions received on the basis of operator decomposition of the polarization scattering matrix have similar statistical properties for all the investigated metal objects whereas polarization characteristics of radar signals backscattered by the mountains are significantly different. The received results demonstrate the possibility of detecting metal objects with small cross-sections against the background of intense backscattering from mountains using transfer functions. That contributes for enhancement of remote sensing means for search-and-rescue works.
{"title":"Detection of Metal Objects Against Mountain Ranges Using Polarization Transfer Functions","authors":"A. Popov, M. Bortsova","doi":"10.1109/MMET.2018.8460432","DOIUrl":"https://doi.org/10.1109/MMET.2018.8460432","url":null,"abstract":"The paper presents the results of field experimental research of polarization properties of the signals backscattered by metal objects of various configurations against the background of mountain ranges. It is shown that the remote sensing objects polarization transfer functions received on the basis of operator decomposition of the polarization scattering matrix have similar statistical properties for all the investigated metal objects whereas polarization characteristics of radar signals backscattered by the mountains are significantly different. The received results demonstrate the possibility of detecting metal objects with small cross-sections against the background of intense backscattering from mountains using transfer functions. That contributes for enhancement of remote sensing means for search-and-rescue works.","PeriodicalId":343933,"journal":{"name":"2018 IEEE 17th International Conference on Mathematical Methods in Electromagnetic Theory (MMET)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124528080","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 : 2018-07-01DOI: 10.1109/MMET.2018.8460283
S. Berezina, O. Solonets, M. Bortsova
The paper analyses the existing methods of images coordinate referencing using approximating functions and the classical methods for restoring elements of external orientation. It reveals that those methods do not take into account the peculiarities of the images received from unmanned aerial vehicles. The paper investigates the possibility of using Nelder-Mead simplex method instead. To define the elements of external orientation the angles of external orientation were taken for the independent variables. The spatial position was calculated on the basis of angles and given reference points.
{"title":"Referencing of U A V Images Using the Nelder-Mead Method","authors":"S. Berezina, O. Solonets, M. Bortsova","doi":"10.1109/MMET.2018.8460283","DOIUrl":"https://doi.org/10.1109/MMET.2018.8460283","url":null,"abstract":"The paper analyses the existing methods of images coordinate referencing using approximating functions and the classical methods for restoring elements of external orientation. It reveals that those methods do not take into account the peculiarities of the images received from unmanned aerial vehicles. The paper investigates the possibility of using Nelder-Mead simplex method instead. To define the elements of external orientation the angles of external orientation were taken for the independent variables. The spatial position was calculated on the basis of angles and given reference points.","PeriodicalId":343933,"journal":{"name":"2018 IEEE 17th International Conference on Mathematical Methods in Electromagnetic Theory (MMET)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114619327","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 : 2018-07-01DOI: 10.1109/MMET.2018.8460294
O. Sukharevsky, G. Zalevsky
Presented is a mathematically convergent method of calculation of 3-D electromagnetic wave scattering by metal nanoparticles in the optical wavelength band. The method is based on solving the set of the Muller boundary integral equations (IEs). The formulas are derived for the components of optical theorem: total scattering cross-section (TSCS) and extinction cross-section (ECS). Sample results of calculation of these characteristics are shown for various angles of incidence and polarization of a plane electromagnetic wave on a nanoparticle having two different shapes and electric sizes. These results demonstrate the resonances on the surface-plasmon (SP) modes at certain wavelengths.
{"title":"3-D Electromagnetic Scattering by Ellipsoidal Silver Nanoparticles in Optical Band","authors":"O. Sukharevsky, G. Zalevsky","doi":"10.1109/MMET.2018.8460294","DOIUrl":"https://doi.org/10.1109/MMET.2018.8460294","url":null,"abstract":"Presented is a mathematically convergent method of calculation of 3-D electromagnetic wave scattering by metal nanoparticles in the optical wavelength band. The method is based on solving the set of the Muller boundary integral equations (IEs). The formulas are derived for the components of optical theorem: total scattering cross-section (TSCS) and extinction cross-section (ECS). Sample results of calculation of these characteristics are shown for various angles of incidence and polarization of a plane electromagnetic wave on a nanoparticle having two different shapes and electric sizes. These results demonstrate the resonances on the surface-plasmon (SP) modes at certain wavelengths.","PeriodicalId":343933,"journal":{"name":"2018 IEEE 17th International Conference on Mathematical Methods in Electromagnetic Theory (MMET)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127948768","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 : 2018-07-01DOI: 10.1109/MMET.2018.8460321
V. Volosyuk, V. Pavlikov, S. Zhyla
The basic principles of the scalar diffraction theory and the fundamental theorems of electromagnetic field calculation at any point in the volume from the field stated on the surface are analyzed. It follows from the analysis that the concretization of spatially-distributed boundary conditions for real earth surfaces considerably complicates the solution of diffraction problems. It is proposed to use the phenomenological description of electromagnetic fields in the domain of their registration. Examples of restoration of coherent images from the received fields in the Fresnel zone for remote sensing problems are give. The complex structure of the obtained coherent images requires their consideration not only in the form of Riemann integrals, but also as the Lebesgue, Stieltjes integrals, and the stochastic Ito integral.
{"title":"Phenomenological Description of the Electromagnetic Field and Coherent Images in Radio Engineering and Optical Systems","authors":"V. Volosyuk, V. Pavlikov, S. Zhyla","doi":"10.1109/MMET.2018.8460321","DOIUrl":"https://doi.org/10.1109/MMET.2018.8460321","url":null,"abstract":"The basic principles of the scalar diffraction theory and the fundamental theorems of electromagnetic field calculation at any point in the volume from the field stated on the surface are analyzed. It follows from the analysis that the concretization of spatially-distributed boundary conditions for real earth surfaces considerably complicates the solution of diffraction problems. It is proposed to use the phenomenological description of electromagnetic fields in the domain of their registration. Examples of restoration of coherent images from the received fields in the Fresnel zone for remote sensing problems are give. The complex structure of the obtained coherent images requires their consideration not only in the form of Riemann integrals, but also as the Lebesgue, Stieltjes integrals, and the stochastic Ito integral.","PeriodicalId":343933,"journal":{"name":"2018 IEEE 17th International Conference on Mathematical Methods in Electromagnetic Theory (MMET)","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128635041","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 : 2018-07-01DOI: 10.1109/MMET.2018.8460275
G. Koshovy
Fundamentals of the electromagnetic theory of flat impedance strip gratings (FISG) are presented. The problem of wave scattering by FISG is treated in the classical full-wave formulation with the aid of the integral equation technique. Several mathematical models are used to analyze electromagnetic wave interaction with FISG. Mathematically grounded asymptotic models of wave scattering by the simplest narrow-strip FISG deliver explicit solutions and are considered in details.
{"title":"Rigorous Asymptotic Models of Wave Scattering by Finite Flat Gratings of Electrically Narrow Impedance Strips","authors":"G. Koshovy","doi":"10.1109/MMET.2018.8460275","DOIUrl":"https://doi.org/10.1109/MMET.2018.8460275","url":null,"abstract":"Fundamentals of the electromagnetic theory of flat impedance strip gratings (FISG) are presented. The problem of wave scattering by FISG is treated in the classical full-wave formulation with the aid of the integral equation technique. Several mathematical models are used to analyze electromagnetic wave interaction with FISG. Mathematically grounded asymptotic models of wave scattering by the simplest narrow-strip FISG deliver explicit solutions and are considered in details.","PeriodicalId":343933,"journal":{"name":"2018 IEEE 17th International Conference on Mathematical Methods in Electromagnetic Theory (MMET)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116265211","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 : 2018-07-01DOI: 10.1109/MMET.2018.8460400
V. Khrychov, M. Legenkiy
The problem of construction a facet model of complex shape object for simulation of scattering electromagnetic is considered. It is proposed to use the approach of raytracing and kd-trees in order to take into account the re-reflections between some parts of the object. An algorithm for simplifying the geometric model of the object is proposed in order to reduce the time necessary for modeling. Comparison of calculated fields for identical objects, but with a different number of facets, showed that combining facets accelerates the simulation without violating its accuracy.
{"title":"Facet Model Processing for Complex Shape Object Scattering Calculation","authors":"V. Khrychov, M. Legenkiy","doi":"10.1109/MMET.2018.8460400","DOIUrl":"https://doi.org/10.1109/MMET.2018.8460400","url":null,"abstract":"The problem of construction a facet model of complex shape object for simulation of scattering electromagnetic is considered. It is proposed to use the approach of raytracing and kd-trees in order to take into account the re-reflections between some parts of the object. An algorithm for simplifying the geometric model of the object is proposed in order to reduce the time necessary for modeling. Comparison of calculated fields for identical objects, but with a different number of facets, showed that combining facets accelerates the simulation without violating its accuracy.","PeriodicalId":343933,"journal":{"name":"2018 IEEE 17th International Conference on Mathematical Methods in Electromagnetic Theory (MMET)","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122485986","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 : 2018-07-01DOI: 10.1109/MMET.2018.8460459
V. Fitio, I. Yaremchuk, O. Vernyhor, Y. Bobitski
A Fourier series expansion method for analysis of reflection of electromagnetic waves by multilayer structures is considered and improved. It is shown that various structures can be analyzed by this method in the formulation of exact boundary conditions. In additional, the amount of calculations is reduced and the accuracy of calculation is increased.
{"title":"Improvement of the Fourier Expansion of the Electric Field Method for the Analysis of Reflectance by the Multilayered Structures","authors":"V. Fitio, I. Yaremchuk, O. Vernyhor, Y. Bobitski","doi":"10.1109/MMET.2018.8460459","DOIUrl":"https://doi.org/10.1109/MMET.2018.8460459","url":null,"abstract":"A Fourier series expansion method for analysis of reflection of electromagnetic waves by multilayer structures is considered and improved. It is shown that various structures can be analyzed by this method in the formulation of exact boundary conditions. In additional, the amount of calculations is reduced and the accuracy of calculation is increased.","PeriodicalId":343933,"journal":{"name":"2018 IEEE 17th International Conference on Mathematical Methods in Electromagnetic Theory (MMET)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122715367","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 : 2018-07-01DOI: 10.1109/mmet.2018.8460362
O. Sulymenko, O. Prokopenko
Electrodynamic model of a THz-frequency signal source utilizing an antiferromagnetic spin Hall oscillator (SHO), where the magnetization vectors of the antiferromagnet's (AFM) sublattices are canted inside the easy plane, resulting in the appearance of the small net magnetization vector, is proposed and analyzed. A bias dc electric current applied to the SHO creates a spin current that, being injected in the AFM layer, starts to rotate the net magnetization of the canted AFM with the THz frequency proportional to the injected spin current. This rotation of the small net magnetization results in the THz-frequency dipolar radiation that can be directly registered by an adjacent resonator. Our calculations show that the radiation power increases with the increase of frequency $f$ and could exceed $1 mu W$ at $f$ ~ 0.5 THz for the case of a high-quality dielectric resonator coupled to the AFM layer.
{"title":"Electrodynamic Model of THz- Frequency Signal Source Based on Antiferromagnetic Spin Hall Auto-oscillator","authors":"O. Sulymenko, O. Prokopenko","doi":"10.1109/mmet.2018.8460362","DOIUrl":"https://doi.org/10.1109/mmet.2018.8460362","url":null,"abstract":"Electrodynamic model of a THz-frequency signal source utilizing an antiferromagnetic spin Hall oscillator (SHO), where the magnetization vectors of the antiferromagnet's (AFM) sublattices are canted inside the easy plane, resulting in the appearance of the small net magnetization vector, is proposed and analyzed. A bias dc electric current applied to the SHO creates a spin current that, being injected in the AFM layer, starts to rotate the net magnetization of the canted AFM with the THz frequency proportional to the injected spin current. This rotation of the small net magnetization results in the THz-frequency dipolar radiation that can be directly registered by an adjacent resonator. Our calculations show that the radiation power increases with the increase of frequency $f$ and could exceed $1 mu W$ at $f$ ~ 0.5 THz for the case of a high-quality dielectric resonator coupled to the AFM layer.","PeriodicalId":343933,"journal":{"name":"2018 IEEE 17th International Conference on Mathematical Methods in Electromagnetic Theory (MMET)","volume":"94 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133130170","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 : 2018-07-01DOI: 10.1109/MMET.2018.8460276
A. Spiridonov, E. Karchevskii
Eigenmodes of triangular microcavities with piercing holes in the center are computed as solutions of the Lasing Eigenvalue Problem using the system of Muller boundary integral equations and the Nyström method. The numerical study demonstrates that small centered holes in equilateral triangular microcavities can lead to a significant growth of the directionality of laser modes with the preservation of their low thresholds.
{"title":"Modal Fields of a Triangular Microcavity Laser with a Piercing Hole","authors":"A. Spiridonov, E. Karchevskii","doi":"10.1109/MMET.2018.8460276","DOIUrl":"https://doi.org/10.1109/MMET.2018.8460276","url":null,"abstract":"Eigenmodes of triangular microcavities with piercing holes in the center are computed as solutions of the Lasing Eigenvalue Problem using the system of Muller boundary integral equations and the Nyström method. The numerical study demonstrates that small centered holes in equilateral triangular microcavities can lead to a significant growth of the directionality of laser modes with the preservation of their low thresholds.","PeriodicalId":343933,"journal":{"name":"2018 IEEE 17th International Conference on Mathematical Methods in Electromagnetic Theory (MMET)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114979988","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}
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