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/UkrMW58013.2022.10037137
E. Alekseev, V. Ilyushin, R. Motiyenko, V. Budnikov
We present a project of a new DDS-based multi-functional spectrometer and the results of its partial implementation. The proposed instrument may be rather quickly transformed from an absorption spectrometer to an emission one. Multi-functionality of proposed solution allows one to benefit from the strong features of different spectroscopic techniques depending on the goals of performed spectroscopic study. The emission spectroscopy techniques may be applied to reach the highest sensitivity or allow studying of non-stationary objects with a segmented chirped-pulse mode. The absorption spectroscopy techniques may be applied to reach the highest resolution and accuracy via Lamb-dip measurements or allow traditional studying of molecular spectra with Doppler-limited resolution.
{"title":"The DDS-based Multi-functional Spectrometer","authors":"E. Alekseev, V. Ilyushin, R. Motiyenko, V. Budnikov","doi":"10.1109/UkrMW58013.2022.10037137","DOIUrl":"https://doi.org/10.1109/UkrMW58013.2022.10037137","url":null,"abstract":"We present a project of a new DDS-based multi-functional spectrometer and the results of its partial implementation. The proposed instrument may be rather quickly transformed from an absorption spectrometer to an emission one. Multi-functionality of proposed solution allows one to benefit from the strong features of different spectroscopic techniques depending on the goals of performed spectroscopic study. The emission spectroscopy techniques may be applied to reach the highest sensitivity or allow studying of non-stationary objects with a segmented chirped-pulse mode. The absorption spectroscopy techniques may be applied to reach the highest resolution and accuracy via Lamb-dip measurements or allow traditional studying of molecular spectra with Doppler-limited resolution.","PeriodicalId":297673,"journal":{"name":"2022 IEEE 2nd Ukrainian Microwave Week (UkrMW)","volume":"62 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":"125837002","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/UkrMW58013.2022.10037131
S. Litvintsev, S. Rozenko, L. Pinchuk
This article proposes an approach that makes it possible to provide a single bandwidth in bandpass filter (BPF) based on transmission lines (TL) segments. All another (parasitic) bandwidths except for the main are suppressed. This BPF uses two types of resonators, which are interconnected by TL segments of half-wave length. Proposed resonators are included in the BPF as parallel stubs. Some resonators are nonuniform TL resonators with a shorted end, while others are uniform TL resonators with an open end. The effect of suppressing all parasitic bandwidths is achieved by a special mutual placement of resonant and antiresonant frequencies of resonators of two types. The traditional design, which uses couplings between resonators, is not applicable to the considered filters. Therefore, parameters of a single-band filter, which provide the required bandwidth, are determined numerically. In this way, dependences that allow calculating the filter parameters are constructed.
{"title":"Synthesis of Nonuniform TL Resonators for Bandpass Filters with Single Passband","authors":"S. Litvintsev, S. Rozenko, L. Pinchuk","doi":"10.1109/UkrMW58013.2022.10037131","DOIUrl":"https://doi.org/10.1109/UkrMW58013.2022.10037131","url":null,"abstract":"This article proposes an approach that makes it possible to provide a single bandwidth in bandpass filter (BPF) based on transmission lines (TL) segments. All another (parasitic) bandwidths except for the main are suppressed. This BPF uses two types of resonators, which are interconnected by TL segments of half-wave length. Proposed resonators are included in the BPF as parallel stubs. Some resonators are nonuniform TL resonators with a shorted end, while others are uniform TL resonators with an open end. The effect of suppressing all parasitic bandwidths is achieved by a special mutual placement of resonant and antiresonant frequencies of resonators of two types. The traditional design, which uses couplings between resonators, is not applicable to the considered filters. Therefore, parameters of a single-band filter, which provide the required bandwidth, are determined numerically. In this way, dependences that allow calculating the filter parameters are constructed.","PeriodicalId":297673,"journal":{"name":"2022 IEEE 2nd Ukrainian Microwave Week (UkrMW)","volume":"1 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":"129722668","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/UkrMW58013.2022.10037072
O. Pryshchenko, O. Dumin, V. Plakhtii
The problem of the underground object detection by short impulse electromagnetic wave is presented in this work. The plane electromagnetic wave is incident on the boundary between air and model of the ground normally. The electromagnetic problem of the wave propagation and its reflection on subsurface objects is solved numerically by FDTD method. The time dependences of the reflected wave received under the boundary are analyzed to detect subsurface objects. For this purpose the artificial neural network (ANN) uses the signals received in points under the boundary at fixed height. Time dependencies of received electromagnetic field is discretized with a constant time step. Additional information for the ANN is obtained by time-spatial processing that based on discrete tomography approach. The set of points presented the received time dependences is multiplied on pre-calculated time-spatial attenuation matrix. The matrix is formed on ray tracing method, antenna pattern, wave attenuation and time delays of wave in media. Underground spatial points serve as a secondary source of electromagnetic field. The work of the ANN is verified on testing data that correspond to intermediate positions of a hidden object.
{"title":"Discrete Tomography Approach for Subsurface Object Detection by Artificial Neural Network","authors":"O. Pryshchenko, O. Dumin, V. Plakhtii","doi":"10.1109/UkrMW58013.2022.10037072","DOIUrl":"https://doi.org/10.1109/UkrMW58013.2022.10037072","url":null,"abstract":"The problem of the underground object detection by short impulse electromagnetic wave is presented in this work. The plane electromagnetic wave is incident on the boundary between air and model of the ground normally. The electromagnetic problem of the wave propagation and its reflection on subsurface objects is solved numerically by FDTD method. The time dependences of the reflected wave received under the boundary are analyzed to detect subsurface objects. For this purpose the artificial neural network (ANN) uses the signals received in points under the boundary at fixed height. Time dependencies of received electromagnetic field is discretized with a constant time step. Additional information for the ANN is obtained by time-spatial processing that based on discrete tomography approach. The set of points presented the received time dependences is multiplied on pre-calculated time-spatial attenuation matrix. The matrix is formed on ray tracing method, antenna pattern, wave attenuation and time delays of wave in media. Underground spatial points serve as a secondary source of electromagnetic field. The work of the ANN is verified on testing data that correspond to intermediate positions of a hidden object.","PeriodicalId":297673,"journal":{"name":"2022 IEEE 2nd Ukrainian Microwave Week (UkrMW)","volume":"2 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":"128833707","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/UkrMW58013.2022.10037080
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/UkrMW58013.2022.10037127
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/UkrMW58013.2022.10037017
Igor M. Volovichev, Oleksiy A. Breslavets, Z. Eremenko, G. P. Zouros
We have developed a method for solving the electrodynamic problem for a perfect electric conducting spherical cavity in which a spherical dielectric inhomogeneity is randomly located with respect to the center of the structure. No limitations on the size or on the relative position of the inner dielectric sphere are imposed. The electromagnetic field is appropriately expanded in terms of Hertz potentials. One of features of the method is the ability to satisfy the boundary conditions at the interface between the two media, as well as on the outer metallic spherical surface, at individual points located on these boundaries. In this case, there is no need to integrate and formulate boundary conditions for each basic mode, as it is usually done by classical methods for solving electrodynamic problems in the frequency domain. In the present contribution, we carry out a numerical study to compute the eigenfrequencies in such eccentric configurations. For this purpose, we extract the eigenfrequencies for quasi-TE and quasi-TM modes, and compare the results with an analytical technique. In addition, we validate the results and compare the computational efficiency of our method with HFSS commercial software. Our method turns out to be efficient in terms of CPU time with minimal memory consumption, as compared to the commercial solver.
{"title":"Eigenfrequencies in Microwave Eccentric Spherical Cavities by a Local Point-based Boundary Conditions Method","authors":"Igor M. Volovichev, Oleksiy A. Breslavets, Z. Eremenko, G. P. Zouros","doi":"10.1109/UkrMW58013.2022.10037017","DOIUrl":"https://doi.org/10.1109/UkrMW58013.2022.10037017","url":null,"abstract":"We have developed a method for solving the electrodynamic problem for a perfect electric conducting spherical cavity in which a spherical dielectric inhomogeneity is randomly located with respect to the center of the structure. No limitations on the size or on the relative position of the inner dielectric sphere are imposed. The electromagnetic field is appropriately expanded in terms of Hertz potentials. One of features of the method is the ability to satisfy the boundary conditions at the interface between the two media, as well as on the outer metallic spherical surface, at individual points located on these boundaries. In this case, there is no need to integrate and formulate boundary conditions for each basic mode, as it is usually done by classical methods for solving electrodynamic problems in the frequency domain. In the present contribution, we carry out a numerical study to compute the eigenfrequencies in such eccentric configurations. For this purpose, we extract the eigenfrequencies for quasi-TE and quasi-TM modes, and compare the results with an analytical technique. In addition, we validate the results and compare the computational efficiency of our method with HFSS commercial software. Our method turns out to be efficient in terms of CPU time with minimal memory consumption, as compared to the commercial solver.","PeriodicalId":297673,"journal":{"name":"2022 IEEE 2nd Ukrainian Microwave Week (UkrMW)","volume":"1 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":"126256277","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/UkrMW58013.2022.10037043
A. Degtyarev, M. Dubinin, O. Gurin, V. Maslov, K. Muntean, V. Ryabykh, V. Senyuta, O. Svystunov
Wave beams with different spatial polarizations have found a variety of practical applications. These beams are used in material processing, high resolution metrology, electron acceleration, spectroscopy and microellipsometry. However, at the moment, there are practically no theoretical or experimental results on the features of propagation and focusing of CW THz radiation. For a theoretical study of the propagation and focusing of THz laser beams excited by the modes of a waveguide quasi-optical resonator, the Rayleigh-Sommerfeld vector theory was applied in the work. Well - known methods of measuring in the THz range were used for experimental study. The obtained results supplement the ideas about the features of the propagation of terahertz laser beams, as well as their sharp and moderate focusing.
{"title":"Propagation and Focusing of Low-order Modes of a CW THz Waveguide Laser","authors":"A. Degtyarev, M. Dubinin, O. Gurin, V. Maslov, K. Muntean, V. Ryabykh, V. Senyuta, O. Svystunov","doi":"10.1109/UkrMW58013.2022.10037043","DOIUrl":"https://doi.org/10.1109/UkrMW58013.2022.10037043","url":null,"abstract":"Wave beams with different spatial polarizations have found a variety of practical applications. These beams are used in material processing, high resolution metrology, electron acceleration, spectroscopy and microellipsometry. However, at the moment, there are practically no theoretical or experimental results on the features of propagation and focusing of CW THz radiation. For a theoretical study of the propagation and focusing of THz laser beams excited by the modes of a waveguide quasi-optical resonator, the Rayleigh-Sommerfeld vector theory was applied in the work. Well - known methods of measuring in the THz range were used for experimental study. The obtained results supplement the ideas about the features of the propagation of terahertz laser beams, as well as their sharp and moderate focusing.","PeriodicalId":297673,"journal":{"name":"2022 IEEE 2nd Ukrainian Microwave Week (UkrMW)","volume":"42 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":"130396495","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：