Pub Date : 2010-06-21DOI: 10.1109/MSMW.2010.5546126
A. Lyakhovsky, L. Yatsuk, A. Lyakhovsky
Waveguide slot arrays (WSA) are widely used in ground and onboard radar-tracking, radiorelay, radionavigating systems [1–4]. There is a danger of occurrence interference maxima of the higher orders in WSA on a hollow waveguides. To avoid occurrence of these maxima, distances between radiators are reduced using different ways. One of them is the use of waveguides of the Π-shaped form [2, 3], another one consists in reduction of a waveguide width [4]. To pull together radiators within the limits of one linear array and to reduce distances between radiators in the neighboring linear arrays it is possible to use slowing down a wave in a waveguide by insertion a dielectric layer.
{"title":"The longitudinal slot charakteristics in waveguide with dielectric layer, situated parallel to its broad walls","authors":"A. Lyakhovsky, L. Yatsuk, A. Lyakhovsky","doi":"10.1109/MSMW.2010.5546126","DOIUrl":"https://doi.org/10.1109/MSMW.2010.5546126","url":null,"abstract":"Waveguide slot arrays (WSA) are widely used in ground and onboard radar-tracking, radiorelay, radionavigating systems [1–4]. There is a danger of occurrence interference maxima of the higher orders in WSA on a hollow waveguides. To avoid occurrence of these maxima, distances between radiators are reduced using different ways. One of them is the use of waveguides of the Π-shaped form [2, 3], another one consists in reduction of a waveguide width [4]. To pull together radiators within the limits of one linear array and to reduce distances between radiators in the neighboring linear arrays it is possible to use slowing down a wave in a waveguide by insertion a dielectric layer.","PeriodicalId":129834,"journal":{"name":"2010 INTERNATIONAL KHARKOV SYMPOSIUM ON PHYSICS AND ENGINEERING OF MICROWAVES, MILLIMETER AND SUBMILLIMETER WAVES","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133937455","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 : 2010-06-21DOI: 10.1109/MSMW.2010.5546198
O. Rybin, T. Nawaz, A. Pitafi
Metamaterials are of practical interest because of unusual properties that are not available in the real nature: the enhancement of the dielectric and magnetic constants, their low (so called ULI materials) or negative values (so called L-H materials). In recent years scientists pay special attention to metamaterials with real part of the effective magnetic constant essentially different from 1. This is because the desired properties of conventional ferrites are seriously degraded at frequencies above 1 GHz [1].
{"title":"Unusual properties of two-component metamaterial medium with metal ferrite like inclusions in the microwave frequency range","authors":"O. Rybin, T. Nawaz, A. Pitafi","doi":"10.1109/MSMW.2010.5546198","DOIUrl":"https://doi.org/10.1109/MSMW.2010.5546198","url":null,"abstract":"Metamaterials are of practical interest because of unusual properties that are not available in the real nature: the enhancement of the dielectric and magnetic constants, their low (so called ULI materials) or negative values (so called L-H materials). In recent years scientists pay special attention to metamaterials with real part of the effective magnetic constant essentially different from 1. This is because the desired properties of conventional ferrites are seriously degraded at frequencies above 1 GHz [1].","PeriodicalId":129834,"journal":{"name":"2010 INTERNATIONAL KHARKOV SYMPOSIUM ON PHYSICS AND ENGINEERING OF MICROWAVES, MILLIMETER AND SUBMILLIMETER WAVES","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128626380","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 : 2010-06-21DOI: 10.1109/MSMW.2010.5546029
S. Nedukh, A. Girich, A. Kharchenko, M. Khodzitsky, S. Tarapov, A. Pogorily, A. Tovstolytkin, A. Belous
Magnetoresonance features of strontium-doped lanthanum manganites-perovskites in microwave band were investigated. One wide resonance peak has been observed for sintered bulk specimen. For thin-films specimens two resonance peaks has been detected. This fact shows that in thin-film specimens a few magnetic subsystems present. One of them has a low magnetization of saturation magnitude and corresponds to asperomagnetic magnetic state in our view. Other peak corresponds to typical ferromagnetic state apparently.
{"title":"Magnetoresonance features of strontium-doped lanthanum manganites-perovskites in microwave band","authors":"S. Nedukh, A. Girich, A. Kharchenko, M. Khodzitsky, S. Tarapov, A. Pogorily, A. Tovstolytkin, A. Belous","doi":"10.1109/MSMW.2010.5546029","DOIUrl":"https://doi.org/10.1109/MSMW.2010.5546029","url":null,"abstract":"Magnetoresonance features of strontium-doped lanthanum manganites-perovskites in microwave band were investigated. One wide resonance peak has been observed for sintered bulk specimen. For thin-films specimens two resonance peaks has been detected. This fact shows that in thin-film specimens a few magnetic subsystems present. One of them has a low magnetization of saturation magnitude and corresponds to asperomagnetic magnetic state in our view. Other peak corresponds to typical ferromagnetic state apparently.","PeriodicalId":129834,"journal":{"name":"2010 INTERNATIONAL KHARKOV SYMPOSIUM ON PHYSICS AND ENGINEERING OF MICROWAVES, MILLIMETER AND SUBMILLIMETER WAVES","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128683266","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 : 2010-06-21DOI: 10.1109/MSMW.2010.5546180
E. Zoya
The common feature of considered structures is as follows. At great values of imaginary CP part of high loss medium we have rather small attenuation for the waveguide structure (the rod) or high Q-factor for the resonator structure (the ball). The phase velocity of the waves for all these structures is a bit more the light velocity in the dielectric medium, i.e. the considered waves are fast waves. Thus, the cylinder or spherical waves propagate along the closed cylinder or spherical interface, respectively between the low loss and the high loss dielectrics. This wave field is concentrated nearby the curved interface much more than the wave field on the flat plane interface. The distinguish feature of cylinder and spherical wave is the more dissipation in high loss medium the more field concentration nearby the curved interface. Characteristics of studied waves strongly depend on dielectric properties of high loss medium. It gives the opportunity to use such waves in dielectrometry of high loss media.
{"title":"Millimeter waves propagation on the curved dielectric interface with high loss media","authors":"E. Zoya","doi":"10.1109/MSMW.2010.5546180","DOIUrl":"https://doi.org/10.1109/MSMW.2010.5546180","url":null,"abstract":"The common feature of considered structures is as follows. At great values of imaginary CP part of high loss medium we have rather small attenuation for the waveguide structure (the rod) or high Q-factor for the resonator structure (the ball). The phase velocity of the waves for all these structures is a bit more the light velocity in the dielectric medium, i.e. the considered waves are fast waves. Thus, the cylinder or spherical waves propagate along the closed cylinder or spherical interface, respectively between the low loss and the high loss dielectrics. This wave field is concentrated nearby the curved interface much more than the wave field on the flat plane interface. The distinguish feature of cylinder and spherical wave is the more dissipation in high loss medium the more field concentration nearby the curved interface. Characteristics of studied waves strongly depend on dielectric properties of high loss medium. It gives the opportunity to use such waves in dielectrometry of high loss media.","PeriodicalId":129834,"journal":{"name":"2010 INTERNATIONAL KHARKOV SYMPOSIUM ON PHYSICS AND ENGINEERING OF MICROWAVES, MILLIMETER AND SUBMILLIMETER WAVES","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128515423","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 : 2010-06-21DOI: 10.1109/MSMW.2010.5546078
A. Gubin, S. Vitusevich, N. Klein, A. A. Lavrinovich
The investigation of the complex conductivity (or permittivity) of superconducting samples by grazing incidence microwave reflectivity measurements is a promising method to study of the samples with different thicknesses in wide temperature range (i.e. conductivity range) [1,2]. The main feature of the method is use of grazing incidence p-polarized wave in order to increase the sensitivity of the measurement, which makes possible such a kind of investigation. The sensitivity of the reflection coefficient to permittivity changes increases up to Brewster angle, which is almost 90 degrees for metals and superconductors. The method could be also useful for the investigation of complex permittivity of different liquids and biochemical solutions by measuring of reflection orand transmission coefficient of the samples under test.
{"title":"Microwave - to - submm wave reflection and transmission coefficients for investigation of biochemical water solutions","authors":"A. Gubin, S. Vitusevich, N. Klein, A. A. Lavrinovich","doi":"10.1109/MSMW.2010.5546078","DOIUrl":"https://doi.org/10.1109/MSMW.2010.5546078","url":null,"abstract":"The investigation of the complex conductivity (or permittivity) of superconducting samples by grazing incidence microwave reflectivity measurements is a promising method to study of the samples with different thicknesses in wide temperature range (i.e. conductivity range) [1,2]. The main feature of the method is use of grazing incidence p-polarized wave in order to increase the sensitivity of the measurement, which makes possible such a kind of investigation. The sensitivity of the reflection coefficient to permittivity changes increases up to Brewster angle, which is almost 90 degrees for metals and superconductors. The method could be also useful for the investigation of complex permittivity of different liquids and biochemical solutions by measuring of reflection orand transmission coefficient of the samples under test.","PeriodicalId":129834,"journal":{"name":"2010 INTERNATIONAL KHARKOV SYMPOSIUM ON PHYSICS AND ENGINEERING OF MICROWAVES, MILLIMETER AND SUBMILLIMETER WAVES","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117238409","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 : 2010-06-21DOI: 10.1109/MSMW.2010.5546105
A. Antonov, G. V. Bezuglaya, Y. Gerasimov, Yu. V. Karelin
Studying of characteristics of solar activity is one of the major astrophysical problems. Special interest is represented with solar flares. It is possible to receive the important information on physical processes causing this phenomenon on the basis of the analysis of radioastronomical observations in mm range of wavelengths. The area of flare is optically thin in mm range. Therefore observations on these waves allow looking inside of solar flare to estimate a condition flare environments, its temperature, density of plasma, magnitude of magnetic field, a ratio of gas and magnetic pressure. Apparent emission is caused by the gyro-synchrotron mechanism of radiation of a stream of the accelerated nonthermal electrons in magnetic tubes and has high sensitivity to fluctuations of a magnetic field. In magnetic tubes there are magnetohydrodynamic waves. Their resonance in tubes and formation of standing waves causes longitudinal modulation of a magnetic field and modulation of a radiation field. Its dynamic spectrum allows to determine frequencies of fluctuations of radiation, a depth of modulation of a magnetic field magnetohydrodynamic oscillations. Simultaneous observations of examined solar flare in an ultraviolet range allow to receive images of hot magnetic tubes. The spatial size of flexural oscillations of tubes and frequency of oscillations of radiation determine value of velocity of a resonating Alfven wave. Data of measurements and the characteristic of a dynamic spectrum allow to determine parameters of plasma in a impulsive phase of solar flare under the formulas received by us.
{"title":"State of plasma in impulsive phase of solar flare","authors":"A. Antonov, G. V. Bezuglaya, Y. Gerasimov, Yu. V. Karelin","doi":"10.1109/MSMW.2010.5546105","DOIUrl":"https://doi.org/10.1109/MSMW.2010.5546105","url":null,"abstract":"Studying of characteristics of solar activity is one of the major astrophysical problems. Special interest is represented with solar flares. It is possible to receive the important information on physical processes causing this phenomenon on the basis of the analysis of radioastronomical observations in mm range of wavelengths. The area of flare is optically thin in mm range. Therefore observations on these waves allow looking inside of solar flare to estimate a condition flare environments, its temperature, density of plasma, magnitude of magnetic field, a ratio of gas and magnetic pressure. Apparent emission is caused by the gyro-synchrotron mechanism of radiation of a stream of the accelerated nonthermal electrons in magnetic tubes and has high sensitivity to fluctuations of a magnetic field. In magnetic tubes there are magnetohydrodynamic waves. Their resonance in tubes and formation of standing waves causes longitudinal modulation of a magnetic field and modulation of a radiation field. Its dynamic spectrum allows to determine frequencies of fluctuations of radiation, a depth of modulation of a magnetic field magnetohydrodynamic oscillations. Simultaneous observations of examined solar flare in an ultraviolet range allow to receive images of hot magnetic tubes. The spatial size of flexural oscillations of tubes and frequency of oscillations of radiation determine value of velocity of a resonating Alfven wave. Data of measurements and the characteristic of a dynamic spectrum allow to determine parameters of plasma in a impulsive phase of solar flare under the formulas received by us.","PeriodicalId":129834,"journal":{"name":"2010 INTERNATIONAL KHARKOV SYMPOSIUM ON PHYSICS AND ENGINEERING OF MICROWAVES, MILLIMETER AND SUBMILLIMETER WAVES","volume":"241 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115589618","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 : 2010-06-21DOI: 10.1109/MSMW.2010.5545998
T. Bertuch, M. Pamies, C. Locker, P. Knott, H. Erkens, R. Wunderlich, S. Heinen
Motivated by new performance requirements and technological progress Fraunhofer FHR has initiated the development of a low-cost coherent radar system demonstrator with AESA antenna for maritime applications. The proposed system is expected to exhibit smaller operational costs and better performance than conventional ship-borne navigation radar systems. In this contribution an overview of the total system was given. Emphasis was placed on the overall system design and the verification of the feasibility resorting to commercial low-cost components (COTS). The antenna front-end and the custom-designed mixed-signal integrated circuits which are the core components of the T/R-modules were presented. In the near future, a demonstrator of the antenna front-end will be completed enabling representative performance measurements.
{"title":"System aspects of a low-cost coherent radar system with AESA antenna for maritime applications","authors":"T. Bertuch, M. Pamies, C. Locker, P. Knott, H. Erkens, R. Wunderlich, S. Heinen","doi":"10.1109/MSMW.2010.5545998","DOIUrl":"https://doi.org/10.1109/MSMW.2010.5545998","url":null,"abstract":"Motivated by new performance requirements and technological progress Fraunhofer FHR has initiated the development of a low-cost coherent radar system demonstrator with AESA antenna for maritime applications. The proposed system is expected to exhibit smaller operational costs and better performance than conventional ship-borne navigation radar systems. In this contribution an overview of the total system was given. Emphasis was placed on the overall system design and the verification of the feasibility resorting to commercial low-cost components (COTS). The antenna front-end and the custom-designed mixed-signal integrated circuits which are the core components of the T/R-modules were presented. In the near future, a demonstrator of the antenna front-end will be completed enabling representative performance measurements.","PeriodicalId":129834,"journal":{"name":"2010 INTERNATIONAL KHARKOV SYMPOSIUM ON PHYSICS AND ENGINEERING OF MICROWAVES, MILLIMETER AND SUBMILLIMETER WAVES","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126744786","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 : 2010-06-21DOI: 10.1109/MSMW.2010.5546069
M. Mykhailova, V. Kontorovich
Inverse Compton scattering is the interaction process between photons and ultrarelativistic electrons as a result of this process, the frequency of scattered photons violently increases. This mechanism plays important part in origin of X-ray and gamma-ray emission in astrophysical objects, such as jets of quasars and active galaxies, supernova remnants, pulsars. Generally, in this objects the frequency and energy distributions have a low-power nature due to the acceleration processes of cosmic rays. Usually, the consideration of inverse Compton effect is constrained by assumption that the scattering emission is isotropic [1]. For example, such situation takes place at the scattering on the cosmic microwave background. In present work we analyze the inverse Compton scattering of anisotropic low-power radio emission of quasar on relativistic jet's electrons by the example of the nearest quasar 3C 273. The flux density of quasar emission is Fa(ω)∞ω−α. The relativistic electrons in the nearest to the quasar knot (the region of increased surface brightness in which acceleration processes occur) of kiloparsec jet have low-power energy spectrum f(Γ)∞Γ−γ, it follows from data of his optical and radio synchrotron emission. In present task the angle of the jet with line of sight, it is also the angle between initial and scattered photon impulses, is known θ≈30°[2].
{"title":"Inverse compton scattering of power-low photon spectrum for astrophysical application","authors":"M. Mykhailova, V. Kontorovich","doi":"10.1109/MSMW.2010.5546069","DOIUrl":"https://doi.org/10.1109/MSMW.2010.5546069","url":null,"abstract":"Inverse Compton scattering is the interaction process between photons and ultrarelativistic electrons as a result of this process, the frequency of scattered photons violently increases. This mechanism plays important part in origin of X-ray and gamma-ray emission in astrophysical objects, such as jets of quasars and active galaxies, supernova remnants, pulsars. Generally, in this objects the frequency and energy distributions have a low-power nature due to the acceleration processes of cosmic rays. Usually, the consideration of inverse Compton effect is constrained by assumption that the scattering emission is isotropic [1]. For example, such situation takes place at the scattering on the cosmic microwave background. In present work we analyze the inverse Compton scattering of anisotropic low-power radio emission of quasar on relativistic jet's electrons by the example of the nearest quasar 3C 273. The flux density of quasar emission is Fa(ω)∞ω−α. The relativistic electrons in the nearest to the quasar knot (the region of increased surface brightness in which acceleration processes occur) of kiloparsec jet have low-power energy spectrum f(Γ)∞Γ−γ, it follows from data of his optical and radio synchrotron emission. In present task the angle of the jet with line of sight, it is also the angle between initial and scattered photon impulses, is known θ≈30°[2].","PeriodicalId":129834,"journal":{"name":"2010 INTERNATIONAL KHARKOV SYMPOSIUM ON PHYSICS AND ENGINEERING OF MICROWAVES, MILLIMETER AND SUBMILLIMETER WAVES","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127574215","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 : 2010-06-21DOI: 10.1109/MSMW.2010.5546048
E. Alekseev, R. Motiyenko, L. Margulès
For a long time it was generally agreed that microwave PLL-spectrometers are rather complicated devices which allows to record molecular spectra rather slowly and in rather narrow frequency range. Therefore for full frequency range scan some alternative techniques were applied. There are two rather similar approaches: the so called RAD-3 spectrometer [1] and the Fast Scan Submillimeter Spectroscopic Technique (FASSST) spectrometer [2, 3]. Both these instruments based on application of BWO have essentially common feature: they do not use a phase-locked system for BWO frequency stabilization. Main advantage of both above-mentioned techniques is the possibility to obtain wide-range frequency scan. In addition FASSST spectrometer allows to record molecular spectra very rapidly. However the absence of phase-locked system leads to a principal disadvantage: both spectrometers provide rather low measurement accuracy. Typically, the uncertainties of the frequency determination of spectrometers without phase-locked system are about two orders of magnitude worse than those of PLL-spectrometers.
{"title":"A fast scan synthesizer-based microwave spectrometer","authors":"E. Alekseev, R. Motiyenko, L. Margulès","doi":"10.1109/MSMW.2010.5546048","DOIUrl":"https://doi.org/10.1109/MSMW.2010.5546048","url":null,"abstract":"For a long time it was generally agreed that microwave PLL-spectrometers are rather complicated devices which allows to record molecular spectra rather slowly and in rather narrow frequency range. Therefore for full frequency range scan some alternative techniques were applied. There are two rather similar approaches: the so called RAD-3 spectrometer [1] and the Fast Scan Submillimeter Spectroscopic Technique (FASSST) spectrometer [2, 3]. Both these instruments based on application of BWO have essentially common feature: they do not use a phase-locked system for BWO frequency stabilization. Main advantage of both above-mentioned techniques is the possibility to obtain wide-range frequency scan. In addition FASSST spectrometer allows to record molecular spectra very rapidly. However the absence of phase-locked system leads to a principal disadvantage: both spectrometers provide rather low measurement accuracy. Typically, the uncertainties of the frequency determination of spectrometers without phase-locked system are about two orders of magnitude worse than those of PLL-spectrometers.","PeriodicalId":129834,"journal":{"name":"2010 INTERNATIONAL KHARKOV SYMPOSIUM ON PHYSICS AND ENGINEERING OF MICROWAVES, MILLIMETER AND SUBMILLIMETER WAVES","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124332609","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 : 2010-06-21DOI: 10.1109/MSMW.2010.5545959
M. Glyavin, A. Kuftin, O.V. Maligin, V. Manuilov, M. Moiseev, A. Sedov, V. Zapevalov, N. Zavolsky
This paper presents an overview of research activity for development of relatively low-power (10–100 W) submillimeter CW gyrotrons at the IAP RAS. Those investigations were started in the 1970–80s [1–2] and several tubes with unique parameters have been developed. This time at the IAP RAS were obtained record-breaking results of power and frequency of radiation (1.5 kW for 0.3 THz CW gyrotron at the second harmonic of gyrofrequency). During the end of the 20-th century main efforts were concentrated on development of megawatt power level gyrotrons for nuclear fusion experiments and submillimeter wave activity was rather slackened. At present, interest to submillimeter devices has been strengthened since this frequency range is attractive for numerous applications, which include plasma diagnostics, electron-spin resonance spectroscopy, enhancement of NMR sensitivity using dynamic nuclear polarization, standoff detection and imaging of explosives and weapons, new medical technology, atmospheric monitoring, chemical technologies, production of high-purity materials, deep space and specialized satellite communication etc [3–5].
{"title":"Theoretical and experimental investigations of submillimeter CW gyrotrons","authors":"M. Glyavin, A. Kuftin, O.V. Maligin, V. Manuilov, M. Moiseev, A. Sedov, V. Zapevalov, N. Zavolsky","doi":"10.1109/MSMW.2010.5545959","DOIUrl":"https://doi.org/10.1109/MSMW.2010.5545959","url":null,"abstract":"This paper presents an overview of research activity for development of relatively low-power (10–100 W) submillimeter CW gyrotrons at the IAP RAS. Those investigations were started in the 1970–80s [1–2] and several tubes with unique parameters have been developed. This time at the IAP RAS were obtained record-breaking results of power and frequency of radiation (1.5 kW for 0.3 THz CW gyrotron at the second harmonic of gyrofrequency). During the end of the 20-th century main efforts were concentrated on development of megawatt power level gyrotrons for nuclear fusion experiments and submillimeter wave activity was rather slackened. At present, interest to submillimeter devices has been strengthened since this frequency range is attractive for numerous applications, which include plasma diagnostics, electron-spin resonance spectroscopy, enhancement of NMR sensitivity using dynamic nuclear polarization, standoff detection and imaging of explosives and weapons, new medical technology, atmospheric monitoring, chemical technologies, production of high-purity materials, deep space and specialized satellite communication etc [3–5].","PeriodicalId":129834,"journal":{"name":"2010 INTERNATIONAL KHARKOV SYMPOSIUM ON PHYSICS AND ENGINEERING OF MICROWAVES, MILLIMETER AND SUBMILLIMETER WAVES","volume":"4 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124391819","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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