Pub Date : 2022-11-14DOI: 10.1109/UkrMW58013.2022.10037167
M. Andriychuk, I. Bolesta, O. Kushnir, B. Horon
The electromagnetic (EM) wave scattering from a thin inhomogeneous film is studied using the asymptotic approach. This is possible due to small size of particles, which are embedded into inhomogeneous material of a film. The generality of approach proposed allows to investigate the scattering phenomena in the sub-THz range considering the particles of nanosize. Such particles are embedded into thin homogeneous film, and the scattering performances of resulting material are studied. The derived system of linear algebraic equation (SLAE) allows to determine the auxiliary functions, which are used to get the explicit formulas for the scattering problem. The results of numerical computations show that the scattering properties of the designed inhomogeneous film depend on the character of the embedding nanoparticles considerably.
{"title":"Scattering from Thin Inhomogeneous Film Supported by a Dielectric Substrate","authors":"M. Andriychuk, I. Bolesta, O. Kushnir, B. Horon","doi":"10.1109/UkrMW58013.2022.10037167","DOIUrl":"https://doi.org/10.1109/UkrMW58013.2022.10037167","url":null,"abstract":"The electromagnetic (EM) wave scattering from a thin inhomogeneous film is studied using the asymptotic approach. This is possible due to small size of particles, which are embedded into inhomogeneous material of a film. The generality of approach proposed allows to investigate the scattering phenomena in the sub-THz range considering the particles of nanosize. Such particles are embedded into thin homogeneous film, and the scattering performances of resulting material are studied. The derived system of linear algebraic equation (SLAE) allows to determine the auxiliary functions, which are used to get the explicit formulas for the scattering problem. The results of numerical computations show that the scattering properties of the designed inhomogeneous film depend on the character of the embedding nanoparticles considerably.","PeriodicalId":297673,"journal":{"name":"2022 IEEE 2nd Ukrainian Microwave Week (UkrMW)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134641635","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 : 2022-11-14DOI: 10.1109/UkrMW58013.2022.10037127
F. Yanovsky
This paper considers generalized coherent-polarimetric method of retrieving information about remote objects using electromagnetic waves. Both active and passive electronic systems as well as different objects under observation, operating frequency bands, and physical meaning (interpretation) of the frequency as spectral argument can be used. As an example, retrieving information about turbulence using microwave weather radar is considered.
{"title":"Retrieving Information about Remote Objects from Received Signals","authors":"F. Yanovsky","doi":"10.1109/UkrMW58013.2022.10037127","DOIUrl":"https://doi.org/10.1109/UkrMW58013.2022.10037127","url":null,"abstract":"This paper considers generalized coherent-polarimetric method of retrieving information about remote objects using electromagnetic waves. Both active and passive electronic systems as well as different objects under observation, operating frequency bands, and physical meaning (interpretation) of the frequency as spectral argument can be used. As an example, retrieving information about turbulence using microwave weather radar is considered.","PeriodicalId":297673,"journal":{"name":"2022 IEEE 2nd Ukrainian Microwave Week (UkrMW)","volume":"210 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121035287","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 : 2022-11-14DOI: 10.1109/UkrMW58013.2022.10037080
Darya Gurina, I. Hariachevska, M. Dubinin, N. Kokodii, I. Priz
The resonant phenomena arising from the incidence of electromagnetic radiation on the cylinder are investigated. The case when a plane wave is incident on an infinitely long circular cylinder is considered. Resonances arise at certain ratios between the cylinder diameter $D$ and the radiation wavelength $lambda$. In thick refractive cylinders with absorption $(D >> lambda)$ resonances are associated with the appearance of a wave that propagates along the surface of the cylinder, but at some points passes inside it. Scattering and absorption increase at resonance. Fano resonances arise in thin cylinders with a high refractive index. At some values of the cylinder diameter, its interaction with the wave is enhanced (resonance), at other values, the “anti-resonance” is weakened. The distribution of the field in the cylinder and its vicinity and the scattering diagram in these cases are calculated. It is the same as that of a dipole at resonance. With “anti-resonance” the shape of the scattering diagram is close to circular, and the intensity of the scattered radiation is hundreds of times less. The cylinder becomes invisible.
{"title":"Diffraction Resonances in Thin Refractive Fibers","authors":"Darya Gurina, I. Hariachevska, M. Dubinin, N. Kokodii, I. Priz","doi":"10.1109/UkrMW58013.2022.10037080","DOIUrl":"https://doi.org/10.1109/UkrMW58013.2022.10037080","url":null,"abstract":"The resonant phenomena arising from the incidence of electromagnetic radiation on the cylinder are investigated. The case when a plane wave is incident on an infinitely long circular cylinder is considered. Resonances arise at certain ratios between the cylinder diameter $D$ and the radiation wavelength $lambda$. In thick refractive cylinders with absorption $(D >> lambda)$ resonances are associated with the appearance of a wave that propagates along the surface of the cylinder, but at some points passes inside it. Scattering and absorption increase at resonance. Fano resonances arise in thin cylinders with a high refractive index. At some values of the cylinder diameter, its interaction with the wave is enhanced (resonance), at other values, the “anti-resonance” is weakened. The distribution of the field in the cylinder and its vicinity and the scattering diagram in these cases are calculated. It is the same as that of a dipole at resonance. With “anti-resonance” the shape of the scattering diagram is close to circular, and the intensity of the scattered radiation is hundreds of times less. The cylinder becomes invisible.","PeriodicalId":297673,"journal":{"name":"2022 IEEE 2nd Ukrainian Microwave Week (UkrMW)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115981215","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 : 2022-11-14DOI: 10.1109/UkrMW58013.2022.10037056
Tamar Nozadze, K. Henke, Mtvarisa Kurtsikidze, Vera Jeladze, G. Ghvedashvili, R. Zaridze
The purpose of the presented study is to investigate EM exposure on realistic inhomogeneous human models to test mobile phones in terms of electromagnetic (EM) safety. The influence of the human hand (fingers positions) during communication on the mobile phones' antenna matching conditions was studied through computer modeling using the Finite-Difference Time-Domain (FDTD) method for the 3700 MHz communication frequency. Dielectric heating effects caused by EMF absorption in human tissues have been considered in this paper.
{"title":"Study How the Hand Affects on the Mobile Phone Dipole Antenna Matching Conditions to the Free Space at 3700 MHz Frequency","authors":"Tamar Nozadze, K. Henke, Mtvarisa Kurtsikidze, Vera Jeladze, G. Ghvedashvili, R. Zaridze","doi":"10.1109/UkrMW58013.2022.10037056","DOIUrl":"https://doi.org/10.1109/UkrMW58013.2022.10037056","url":null,"abstract":"The purpose of the presented study is to investigate EM exposure on realistic inhomogeneous human models to test mobile phones in terms of electromagnetic (EM) safety. The influence of the human hand (fingers positions) during communication on the mobile phones' antenna matching conditions was studied through computer modeling using the Finite-Difference Time-Domain (FDTD) method for the 3700 MHz communication frequency. Dielectric heating effects caused by EMF absorption in human tissues have been considered in this paper.","PeriodicalId":297673,"journal":{"name":"2022 IEEE 2nd Ukrainian Microwave Week (UkrMW)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116011329","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 : 2022-11-14DOI: 10.1109/UkrMW58013.2022.10037044
Daniele Pinchera
In this contribution, an effective strategy for the synthesis of equal-amplitude (isophoric) sparse arrays is presented. The approach consists of an iterative procedure starting from a non-equal amplitude layout. The method is very effective, and is demonstrated by an in-depth numerical analysis of a synthesis example.
{"title":"An Optimization Strategy for the Synthesis of Hi-Performance Isophoric Sparse Arrays","authors":"Daniele Pinchera","doi":"10.1109/UkrMW58013.2022.10037044","DOIUrl":"https://doi.org/10.1109/UkrMW58013.2022.10037044","url":null,"abstract":"In this contribution, an effective strategy for the synthesis of equal-amplitude (isophoric) sparse arrays is presented. The approach consists of an iterative procedure starting from a non-equal amplitude layout. The method is very effective, and is demonstrated by an in-depth numerical analysis of a synthesis example.","PeriodicalId":297673,"journal":{"name":"2022 IEEE 2nd Ukrainian Microwave Week (UkrMW)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115694186","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 : 2022-11-14DOI: 10.1109/UkrMW58013.2022.10037031
L. Angermann
Some theoretical and computational results for energy-stable conformal finite element time-domain discretizations of Maxwell's system of differential equations with a cubic polarization term are presented. The focus is on energy estimates in the full range from the continuous to the semidiscrete to the fully discrete problem. In addition, an optimal estimate of the fully discrete error for the numerical approximation that is free from step size restrictions is given. Finally, some results of computer experiments are demonstrated.
{"title":"Energy-Stability of Time-Domain Finite Element Solutions to Maxwell's Equations with Cubic Polarization","authors":"L. Angermann","doi":"10.1109/UkrMW58013.2022.10037031","DOIUrl":"https://doi.org/10.1109/UkrMW58013.2022.10037031","url":null,"abstract":"Some theoretical and computational results for energy-stable conformal finite element time-domain discretizations of Maxwell's system of differential equations with a cubic polarization term are presented. The focus is on energy estimates in the full range from the continuous to the semidiscrete to the fully discrete problem. In addition, an optimal estimate of the fully discrete error for the numerical approximation that is free from step size restrictions is given. Finally, some results of computer experiments are demonstrated.","PeriodicalId":297673,"journal":{"name":"2022 IEEE 2nd Ukrainian Microwave Week (UkrMW)","volume":"118 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123239946","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 : 2022-11-14DOI: 10.1109/UkrMW58013.2022.10037119
Khatri Sujay Kumar, B. M. Naik, Srujana Vahini, Bharath Kunooru, D. Ramakrishna
This paper presents a PIFA- Planar Inverted F-Antenna at 2.45GHz. The 2.45 GHz band needs a miniature Planar inverted F antenna, which is the aim of the project. ensuring that., when coupled to a 50-ohm source without an additional feeding circuit, the proposed antenna has a VSWR of less than 2 over the 2.4 GHz ISM band. The design is simulated using HFSS and also the PCB Antenna designer application in MATLAB 2021b. The proposed antenna is finally fabricated and shows a good Gain and the measured results are closely matching with simulated results and are satisfactory for the design frequency. For further evaluation, the same design is simulated using Another EM simulation tool and the results are validated.
{"title":"Design of Miniaturized Planar Inverted F Antenna","authors":"Khatri Sujay Kumar, B. M. Naik, Srujana Vahini, Bharath Kunooru, D. Ramakrishna","doi":"10.1109/UkrMW58013.2022.10037119","DOIUrl":"https://doi.org/10.1109/UkrMW58013.2022.10037119","url":null,"abstract":"This paper presents a PIFA- Planar Inverted F-Antenna at 2.45GHz. The 2.45 GHz band needs a miniature Planar inverted F antenna, which is the aim of the project. ensuring that., when coupled to a 50-ohm source without an additional feeding circuit, the proposed antenna has a VSWR of less than 2 over the 2.4 GHz ISM band. The design is simulated using HFSS and also the PCB Antenna designer application in MATLAB 2021b. The proposed antenna is finally fabricated and shows a good Gain and the measured results are closely matching with simulated results and are satisfactory for the design frequency. For further evaluation, the same design is simulated using Another EM simulation tool and the results are validated.","PeriodicalId":297673,"journal":{"name":"2022 IEEE 2nd Ukrainian Microwave Week (UkrMW)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123789219","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 : 2022-11-14DOI: 10.1109/UkrMW58013.2022.10037049
Y. Gorishnya, A. Shvets
Tweek-atmospherics (tweeks), along with radio transmission by VLF radio stations, are used to study the lower ionosphere. The limits for using the new single-position method for determining of electron density in the lower ionosphere by results of analysis of multimodal tweek-atmospherics is studied upon the experimental records. The database accumulated at the Ukrainian Antarctic Station “Akademik Vernadsky” in 2019 has been used by clustering sources of tweeks. It is shown that the propagation West - East non-reciprocity results in the least attenuation for tweeks arriving from the geomagnetic east. In non-equatorial regions the method discussed can be used up to 10 Mm from receiving point for eastern tweeks and no more than 5 Mm for tweeks from western sector, and for tweeks with other propagation directions these limits lay at roughly 7 Mm from receiving station.
{"title":"New Method for Determining the Lower Ionosphere Plasma Density by Tweek-Atmospherics: the Study of Applicability Limits","authors":"Y. Gorishnya, A. Shvets","doi":"10.1109/UkrMW58013.2022.10037049","DOIUrl":"https://doi.org/10.1109/UkrMW58013.2022.10037049","url":null,"abstract":"Tweek-atmospherics (tweeks), along with radio transmission by VLF radio stations, are used to study the lower ionosphere. The limits for using the new single-position method for determining of electron density in the lower ionosphere by results of analysis of multimodal tweek-atmospherics is studied upon the experimental records. The database accumulated at the Ukrainian Antarctic Station “Akademik Vernadsky” in 2019 has been used by clustering sources of tweeks. It is shown that the propagation West - East non-reciprocity results in the least attenuation for tweeks arriving from the geomagnetic east. In non-equatorial regions the method discussed can be used up to 10 Mm from receiving point for eastern tweeks and no more than 5 Mm for tweeks from western sector, and for tweeks with other propagation directions these limits lay at roughly 7 Mm from receiving station.","PeriodicalId":297673,"journal":{"name":"2022 IEEE 2nd Ukrainian Microwave Week (UkrMW)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123623819","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 : 2022-11-14DOI: 10.1109/UkrMW58013.2022.10037156
Mykhailo Natarov, O. Ulyanov, V. Prisiazhnii, Volodymyr V. Glamazdin, V. Zakharenko, A. Poikhalo, O. Shubnyi, Eugene Alekseev, V. Voytyuk, V. Chmil, O. Reznichenko, V. Ozhinskyi, Volodymyr Vlasenko, M. Palamar
The results of the study of the MARK-4B antenna system of RT -32 radio telescope functional capabilities in S- and X-band are presented. The frequency bands for effective antenna system operation were determined in the study. A theoretical and experimental study of the corrugated feed horn operation possibilities in the S- and X-band has been carried out. The radiation pattern of the antenna system was measured using the Cygnus A radio source in two frequency subranges of the X-band. It is shown that the antenna system can work effectively in the found frequency subranges of S-and X-band. Some promising options for design of a waveguide system for separating S-/X-band signals with orthogonal polarizations are presented.
{"title":"Modernization Possibility of the MARK-4B Antenna System of the RT-32 Radio Telescope for Dual-Band Operation in the S/X Frequency Range","authors":"Mykhailo Natarov, O. Ulyanov, V. Prisiazhnii, Volodymyr V. Glamazdin, V. Zakharenko, A. Poikhalo, O. Shubnyi, Eugene Alekseev, V. Voytyuk, V. Chmil, O. Reznichenko, V. Ozhinskyi, Volodymyr Vlasenko, M. Palamar","doi":"10.1109/UkrMW58013.2022.10037156","DOIUrl":"https://doi.org/10.1109/UkrMW58013.2022.10037156","url":null,"abstract":"The results of the study of the MARK-4B antenna system of RT -32 radio telescope functional capabilities in S- and X-band are presented. The frequency bands for effective antenna system operation were determined in the study. A theoretical and experimental study of the corrugated feed horn operation possibilities in the S- and X-band has been carried out. The radiation pattern of the antenna system was measured using the Cygnus A radio source in two frequency subranges of the X-band. It is shown that the antenna system can work effectively in the found frequency subranges of S-and X-band. Some promising options for design of a waveguide system for separating S-/X-band signals with orthogonal polarizations are presented.","PeriodicalId":297673,"journal":{"name":"2022 IEEE 2nd Ukrainian Microwave Week (UkrMW)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128345689","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 : 2022-11-14DOI: 10.1109/UkrMW58013.2022.10037121
B. Levin
The method of a calculation of electrical characteristics of a loop antenna with a large dimension is proposed.
提出了一种计算大尺寸环形天线电特性的方法。
{"title":"Loop Antenna with Dimensions Comparable with Wave Length","authors":"B. Levin","doi":"10.1109/UkrMW58013.2022.10037121","DOIUrl":"https://doi.org/10.1109/UkrMW58013.2022.10037121","url":null,"abstract":"The method of a calculation of electrical characteristics of a loop antenna with a large dimension is proposed.","PeriodicalId":297673,"journal":{"name":"2022 IEEE 2nd Ukrainian Microwave Week (UkrMW)","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130618307","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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