Pub Date : 2013-06-23DOI: 10.1109/MSMW.2013.6622109
V. Ryskin, A. Shvetsov, V. M. Demkin, L. Kukin, L. Fedoseev, A. M. Shchitov
Studying of thermal balance of terrestrial atmosphere is substantially connected with results of measurements of tropospheric and stratospheric temperature profile. Now in the Russian Federation the system of quasi continuous monitoring of thermodynamic characteristics of atmosphere is carried out thanks to discrete start-up of radiosondes, their top working border seldom reaches stratospheric heights. However, continuous aerologic sounding may be realized by means of the remote methods using microwave atmosphere thermal radiation. Particularly, presence of strong lines and band of molecular oxygen in the atmospheric millimeter wave radiation spectrum make it possible to use them for thermal sounding from ground up to stratopause. For measurement of troposphere temperature profile in Institute of Applied Physics Russian Academy of Sciences 8-channel spectroradiometer is developed. It operates in a frequency range of 50-55 GHz which corresponds to a low-frequency slope of a 5-millimeter wave-band of molecular oxygen spectrum. The device represents heterodyne receiver with low-noise HEMT front end amplifier (LNA). The amplifier has in a working wave-band a gain about of 16 dB and a noise figure no more than 4 dB. The following LNA Shottky diode mixer works on the first harmonic of a local oscillator signal (fLO = 48 GHz) and converts RF input signal to the 2 - 7 GHz intermediate frequency band (IF). Conversion loss of the mixer is 8-10 dB. Local oscillator signal (48 GHz) is formed by means of a signal synthesizer (8 GHz) having output power of 50 mW by multipliers and band-pass filters circuit. Power level of local oscillator signal 48 GHz on a mixer input is not less than 10 mW with suppression of harmful frequencies not less than 50 dB.
{"title":"Ground-based microwave spectroradiometer for thermal sounding of atmosphere","authors":"V. Ryskin, A. Shvetsov, V. M. Demkin, L. Kukin, L. Fedoseev, A. M. Shchitov","doi":"10.1109/MSMW.2013.6622109","DOIUrl":"https://doi.org/10.1109/MSMW.2013.6622109","url":null,"abstract":"Studying of thermal balance of terrestrial atmosphere is substantially connected with results of measurements of tropospheric and stratospheric temperature profile. Now in the Russian Federation the system of quasi continuous monitoring of thermodynamic characteristics of atmosphere is carried out thanks to discrete start-up of radiosondes, their top working border seldom reaches stratospheric heights. However, continuous aerologic sounding may be realized by means of the remote methods using microwave atmosphere thermal radiation. Particularly, presence of strong lines and band of molecular oxygen in the atmospheric millimeter wave radiation spectrum make it possible to use them for thermal sounding from ground up to stratopause. For measurement of troposphere temperature profile in Institute of Applied Physics Russian Academy of Sciences 8-channel spectroradiometer is developed. It operates in a frequency range of 50-55 GHz which corresponds to a low-frequency slope of a 5-millimeter wave-band of molecular oxygen spectrum. The device represents heterodyne receiver with low-noise HEMT front end amplifier (LNA). The amplifier has in a working wave-band a gain about of 16 dB and a noise figure no more than 4 dB. The following LNA Shottky diode mixer works on the first harmonic of a local oscillator signal (fLO = 48 GHz) and converts RF input signal to the 2 - 7 GHz intermediate frequency band (IF). Conversion loss of the mixer is 8-10 dB. Local oscillator signal (48 GHz) is formed by means of a signal synthesizer (8 GHz) having output power of 50 mW by multipliers and band-pass filters circuit. Power level of local oscillator signal 48 GHz on a mixer input is not less than 10 mW with suppression of harmful frequencies not less than 50 dB.","PeriodicalId":104362,"journal":{"name":"2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126424261","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 : 2013-06-23DOI: 10.1109/MSMW.2013.6622159
V. Kravchenko, D. Churikov
On the basis of the atomic functions ha(t) the Kravchenko-Kotelnikov interpolation series for restoration of correlation functions in problems of stochastic processes modeling is offered.
{"title":"Correlation functions interpolation by generalized Kravchenko-Kotelnikov sampling series","authors":"V. Kravchenko, D. Churikov","doi":"10.1109/MSMW.2013.6622159","DOIUrl":"https://doi.org/10.1109/MSMW.2013.6622159","url":null,"abstract":"On the basis of the atomic functions ha(t) the Kravchenko-Kotelnikov interpolation series for restoration of correlation functions in problems of stochastic processes modeling is offered.","PeriodicalId":104362,"journal":{"name":"2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves","volume":"134 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127351770","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 : 2013-06-23DOI: 10.1109/MSMW.2013.6622034
A. Arkhipov, K. Vytovtov
Optimization method for anisotropic layered structure synthesis is proposed. The method is based on a Monte-Carlo optimization algorithm and a numerical second-order optimization methods. The frequency-divided filter is calculated as the result. Obtained filter is discussed and practical application is proposed.
{"title":"Method of the parameters optimization for terahertz anisotropic layered filter","authors":"A. Arkhipov, K. Vytovtov","doi":"10.1109/MSMW.2013.6622034","DOIUrl":"https://doi.org/10.1109/MSMW.2013.6622034","url":null,"abstract":"Optimization method for anisotropic layered structure synthesis is proposed. The method is based on a Monte-Carlo optimization algorithm and a numerical second-order optimization methods. The frequency-divided filter is calculated as the result. Obtained filter is discussed and practical application is proposed.","PeriodicalId":104362,"journal":{"name":"2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127803265","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 : 2013-06-23DOI: 10.1109/MSMW.2013.6622017
Jhuo-Ro Li, C. Chiu, C. Chuang
In this paper, we propose a method, which combines a particle swarm optimization (PSO) algorithm with a Newton-Kantorovitch algorithm for image reconstruction of perfectly conducting objects. First, the inverse problem is recast as a global nonlinear optimization problem, which is solved by a PSO. Then, the solution obtained by the PSO is taken as an initial guess for the Newton-Kantorovitch algorithm to obtain the more accuracy solution in a few iterations. Numerical simulations are conducted to demonstrate that our cascaded method is accurate and practical. Numerical results show that the performance of this cascaded method is better than the individual PSO and the individual Newton-Kantorovitch algorithm. Satisfactory reconstruction has been obtained by using this cascaded method.
{"title":"Application of cascaded methods for inverse problem","authors":"Jhuo-Ro Li, C. Chiu, C. Chuang","doi":"10.1109/MSMW.2013.6622017","DOIUrl":"https://doi.org/10.1109/MSMW.2013.6622017","url":null,"abstract":"In this paper, we propose a method, which combines a particle swarm optimization (PSO) algorithm with a Newton-Kantorovitch algorithm for image reconstruction of perfectly conducting objects. First, the inverse problem is recast as a global nonlinear optimization problem, which is solved by a PSO. Then, the solution obtained by the PSO is taken as an initial guess for the Newton-Kantorovitch algorithm to obtain the more accuracy solution in a few iterations. Numerical simulations are conducted to demonstrate that our cascaded method is accurate and practical. Numerical results show that the performance of this cascaded method is better than the individual PSO and the individual Newton-Kantorovitch algorithm. Satisfactory reconstruction has been obtained by using this cascaded method.","PeriodicalId":104362,"journal":{"name":"2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126519556","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 : 2013-06-23DOI: 10.1109/MSMW.2013.6622116
A. Popkov, I. Kuzmichev
Preliminarily it has been shown [1] that an open resonator (OR) attached to a certain-length superdimensional circular waveguide only maintains axially-symmetric TE01q oscillations (see Fig. 1, b and c). In addition, the resonant system of the kind features a single-frequency response over a wide frequency range and, hence, can be adopted for the determination of electro-physical parameters of materials. An approximate mathematical model of the resonator of the kind has been suggested, and its basic electrodynamical properties were theoretically studied and experimentally checked [2-4].
{"title":"A resonance system for measuring complex permittivity of materials","authors":"A. Popkov, I. Kuzmichev","doi":"10.1109/MSMW.2013.6622116","DOIUrl":"https://doi.org/10.1109/MSMW.2013.6622116","url":null,"abstract":"Preliminarily it has been shown [1] that an open resonator (OR) attached to a certain-length superdimensional circular waveguide only maintains axially-symmetric TE01q oscillations (see Fig. 1, b and c). In addition, the resonant system of the kind features a single-frequency response over a wide frequency range and, hence, can be adopted for the determination of electro-physical parameters of materials. An approximate mathematical model of the resonator of the kind has been suggested, and its basic electrodynamical properties were theoretically studied and experimentally checked [2-4].","PeriodicalId":104362,"journal":{"name":"2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133418660","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 : 2013-06-23DOI: 10.1109/MSMW.2013.6622187
S. D. Andrenko, Y. Kamenev
Wire gratings are widely used for different applications, such as polarizers, beam splitters, phase shifters and so on. Such gratings are fabricated by placing conducting wires within an aperture formed by a metal ring. When H-polarized electromagnetic wave is incident on the grating with electric vector is parallel to the grating wires, the wave is almost totally reflected by the grating as if it was a flat mirror. In the case of E-polarization (electric vector is perpendicular to the grating wires) the incident field is almost completely transmits through the grating. That feature allows us to use wire gratings as an output mirrors of THz lasers. Such mirrors give us an ability to modify and optimize a laser coupling coefficient with an external environment and provide controlling the polarization of the laser output beam without distortion.
{"title":"1D wire gratings transmission and reflection characteristics in the THZ range","authors":"S. D. Andrenko, Y. Kamenev","doi":"10.1109/MSMW.2013.6622187","DOIUrl":"https://doi.org/10.1109/MSMW.2013.6622187","url":null,"abstract":"Wire gratings are widely used for different applications, such as polarizers, beam splitters, phase shifters and so on. Such gratings are fabricated by placing conducting wires within an aperture formed by a metal ring. When H-polarized electromagnetic wave is incident on the grating with electric vector is parallel to the grating wires, the wave is almost totally reflected by the grating as if it was a flat mirror. In the case of E-polarization (electric vector is perpendicular to the grating wires) the incident field is almost completely transmits through the grating. That feature allows us to use wire gratings as an output mirrors of THz lasers. Such mirrors give us an ability to modify and optimize a laser coupling coefficient with an external environment and provide controlling the polarization of the laser output beam without distortion.","PeriodicalId":104362,"journal":{"name":"2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122440643","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 : 2013-06-23DOI: 10.1109/MSMW.2013.6622179
Y. Rapoport, V. Grimalsky, Y. Kivshar, S. Koshevaya, C. Castrejon-M
Starting from the kinetic expression of 2D nonlinear electric current in the graphene, the new equation is derived, to simulate nonlinear THz electromagnetic wave propagation through layered graphene - dielectric lossy structures. A possibility of nonlinear switching of short THz pulses in multilayer structure is shown.
{"title":"Nonlinear switching of terahertz pulses in the structures with graphene layers","authors":"Y. Rapoport, V. Grimalsky, Y. Kivshar, S. Koshevaya, C. Castrejon-M","doi":"10.1109/MSMW.2013.6622179","DOIUrl":"https://doi.org/10.1109/MSMW.2013.6622179","url":null,"abstract":"Starting from the kinetic expression of 2D nonlinear electric current in the graphene, the new equation is derived, to simulate nonlinear THz electromagnetic wave propagation through layered graphene - dielectric lossy structures. A possibility of nonlinear switching of short THz pulses in multilayer structure is shown.","PeriodicalId":104362,"journal":{"name":"2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124062584","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 : 2013-06-23DOI: 10.1109/MSMW.2013.6622086
D. Natarov, M. Marciniak, R. Sauleau
Focusing of waves using solid reflectors is widely used in optics and quasioptics, parabolic reflectors being the most popular and efficient ones. Periodically structured scatterers have been attracting attention of researchers for a long time because of the interesting effects of extraordinary large reflection, transmission and near-field enhancement [1-4]. For the finite periodic gratings of metal scatterers this is explained by effects of surface-plasmon (P) resonances, that are observed on sub-wavelength noble-metal particles and wires in the midinfrared and optical bands [5-7], and grating (G) resonances that are induced by the periodicity [3,4,8]. Excitation of plasmons leads to powerful enhancement of scattered and absorbed light. The wavelengths of the P-resonances depend mainly on the object shape and less on its dimensions. The wavelengths of the Gresonances lie near the Rayleigh wavelengths [9] of linear gratings and hence weakly depend on both the elementary wire shape and its dimension, provided that the wire size is a fraction of the period. In the wave scattering by sparse infinite gratings, G-resonances lead to almost total reflection of the incident field in narrow wavelength bands.
{"title":"Modeling of a discrete parabolic reflector made of sub-wavelength plasmonic wires","authors":"D. Natarov, M. Marciniak, R. Sauleau","doi":"10.1109/MSMW.2013.6622086","DOIUrl":"https://doi.org/10.1109/MSMW.2013.6622086","url":null,"abstract":"Focusing of waves using solid reflectors is widely used in optics and quasioptics, parabolic reflectors being the most popular and efficient ones. Periodically structured scatterers have been attracting attention of researchers for a long time because of the interesting effects of extraordinary large reflection, transmission and near-field enhancement [1-4]. For the finite periodic gratings of metal scatterers this is explained by effects of surface-plasmon (P) resonances, that are observed on sub-wavelength noble-metal particles and wires in the midinfrared and optical bands [5-7], and grating (G) resonances that are induced by the periodicity [3,4,8]. Excitation of plasmons leads to powerful enhancement of scattered and absorbed light. The wavelengths of the P-resonances depend mainly on the object shape and less on its dimensions. The wavelengths of the Gresonances lie near the Rayleigh wavelengths [9] of linear gratings and hence weakly depend on both the elementary wire shape and its dimension, provided that the wire size is a fraction of the period. In the wave scattering by sparse infinite gratings, G-resonances lead to almost total reflection of the incident field in narrow wavelength bands.","PeriodicalId":104362,"journal":{"name":"2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129249522","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 : 2013-06-23DOI: 10.1109/MSMW.2013.6622018
D. Kuryliak
Let us consider three mixed boundary value problems for the Helmholtz equation in the conical region. Next we reduce the boundary value problem to the Wiener-Hopf equations applying Kontorovich-Lebedev integral transformation.
{"title":"Wiener-Hopf technique application to some diffraction problems in conical region","authors":"D. Kuryliak","doi":"10.1109/MSMW.2013.6622018","DOIUrl":"https://doi.org/10.1109/MSMW.2013.6622018","url":null,"abstract":"Let us consider three mixed boundary value problems for the Helmholtz equation in the conical region. Next we reduce the boundary value problem to the Wiener-Hopf equations applying Kontorovich-Lebedev integral transformation.","PeriodicalId":104362,"journal":{"name":"2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117210670","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 : 2013-06-23DOI: 10.1109/MSMW.2013.6622019
I. Anisimov, V. O. Kulish
1. Cherenkov radioemission of electromagnetic waves caused by the point charge moving along the external magnetic field in the magnetoactive plasma is calculated using the direct solution of the motion equations of the plasma electrons. 2. The proposed method allows taking into account the nonlinear effects accompanying the Cherenkov radioemission. 3. It is shown that the influence of the excited field on the moving charge results in its deceleration. 4. Cherenkov radioemission can be interpreted as the radioemission of the plasma electrons' current excited by the electric field of the moving charge.
{"title":"Cherenkov radioemission of electromagnetic waves by the moving point charge in the magnetoactive plasma","authors":"I. Anisimov, V. O. Kulish","doi":"10.1109/MSMW.2013.6622019","DOIUrl":"https://doi.org/10.1109/MSMW.2013.6622019","url":null,"abstract":"1. Cherenkov radioemission of electromagnetic waves caused by the point charge moving along the external magnetic field in the magnetoactive plasma is calculated using the direct solution of the motion equations of the plasma electrons. 2. The proposed method allows taking into account the nonlinear effects accompanying the Cherenkov radioemission. 3. It is shown that the influence of the excited field on the moving charge results in its deceleration. 4. Cherenkov radioemission can be interpreted as the radioemission of the plasma electrons' current excited by the electric field of the moving charge.","PeriodicalId":104362,"journal":{"name":"2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117244770","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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