Pub Date : 2013-06-23DOI: 10.1109/MSMW.2013.6622138
V. Golikov, O. Lebedeva, M. MayAlarcon, J. Padilla Suarez
This paper presents a performance of the known matched subspace detector (MSD) for video-based detection systems. It is well known that a subpixel target occupies only a part of the pixel area. Then there is a difference between the variances under two statistical hypotheses H0 and H1. This fact is a cause of the detector performance degradation. We analyze two opposite phenomena related with an increasing size of the target. First, the target's energy is increased, and, second, the pixel background variance is decreased. The performance degradation has been evaluated when there are the mismatches between the actual and designed parameters. It has been shown that the performance depends strongly on the subpixel background fill factor. These results have been obtained analytically and have been also justified via Monte Carlo simulations for an example scenario.
{"title":"Multiframe subpixel target detection in the presence of fluctuating background and noise","authors":"V. Golikov, O. Lebedeva, M. MayAlarcon, J. Padilla Suarez","doi":"10.1109/MSMW.2013.6622138","DOIUrl":"https://doi.org/10.1109/MSMW.2013.6622138","url":null,"abstract":"This paper presents a performance of the known matched subspace detector (MSD) for video-based detection systems. It is well known that a subpixel target occupies only a part of the pixel area. Then there is a difference between the variances under two statistical hypotheses H0 and H1. This fact is a cause of the detector performance degradation. We analyze two opposite phenomena related with an increasing size of the target. First, the target's energy is increased, and, second, the pixel background variance is decreased. The performance degradation has been evaluated when there are the mismatches between the actual and designed parameters. It has been shown that the performance depends strongly on the subpixel background fill factor. These results have been obtained analytically and have been also justified via Monte Carlo simulations for an example scenario.","PeriodicalId":104362,"journal":{"name":"2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves","volume":"46 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":"121720190","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.2013.6621996
S. Lucyszyn
Summary form only given. Within the wider terahertz (THz) frequency range (ca. 0.1 to 10 THz), the sub-millimetre wave frequency band (between 0.3 and 3 THz) is still considered to be a largely unexplored part of the electromagnetic spectrum. This `THz Gap', between conventional electronics and photonics, offers the real potential for both scientific and commercial exploitation. However, while the majority of THz groups focus on the former, it is the latter that offers the key to bridge the THz Gap to ubiquitous applications. To this end, new engineering solutions are needed in modelling (mathematical & numerical), design (synthesis & analysis) and fabrications (precision & volume production). As ubiquitous THz applications emerge, the costs of associated passive components, active devices and metrology will fall, creating a positive spiral of growth in all areas; enhancing our modern day living and with the prospect of a huge societal and economic impact.
{"title":"An engineering approach towards creating ubiquitous THz applications","authors":"S. Lucyszyn","doi":"10.1109/MSMW.2013.6621996","DOIUrl":"https://doi.org/10.1109/MSMW.2013.6621996","url":null,"abstract":"Summary form only given. Within the wider terahertz (THz) frequency range (ca. 0.1 to 10 THz), the sub-millimetre wave frequency band (between 0.3 and 3 THz) is still considered to be a largely unexplored part of the electromagnetic spectrum. This `THz Gap', between conventional electronics and photonics, offers the real potential for both scientific and commercial exploitation. However, while the majority of THz groups focus on the former, it is the latter that offers the key to bridge the THz Gap to ubiquitous applications. To this end, new engineering solutions are needed in modelling (mathematical & numerical), design (synthesis & analysis) and fabrications (precision & volume production). As ubiquitous THz applications emerge, the costs of associated passive components, active devices and metrology will fall, creating a positive spiral of growth in all areas; enhancing our modern day living and with the prospect of a huge societal and economic impact.","PeriodicalId":104362,"journal":{"name":"2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves","volume":"27 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":"122005073","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.2013.6622114
V. V. Meriakri, M. Parkhomenko, N. A. Fedoseev, Lu-Kuang Lieh
Metal̃organic frameworks (MOFs) are one of the most interesting classes of porous nanostructured hybrid organic̃inorganic materials. Porous solids are of great scientific and technological importance because of their ability to interact with atoms, ions, and molecules not only on the surface, but also in the bulk of a material. The chemistry of MOFs has provided an extensive class of highly stable materials. Recent results on the development and synthesis of MOFs have made it possible to carry out fundamental and applied research. MOFs are very promising for application in adsorption separation, design of sensors, membranes, and gas sorbents, purification and storage of gases, design of telecommunication and industrial electronic devices, insulating materials.
{"title":"Dielectric properties of nanoporous metal̃organic framework materials in the millimeter-wave band","authors":"V. V. Meriakri, M. Parkhomenko, N. A. Fedoseev, Lu-Kuang Lieh","doi":"10.1109/MSMW.2013.6622114","DOIUrl":"https://doi.org/10.1109/MSMW.2013.6622114","url":null,"abstract":"Metal̃organic frameworks (MOFs) are one of the most interesting classes of porous nanostructured hybrid organic̃inorganic materials. Porous solids are of great scientific and technological importance because of their ability to interact with atoms, ions, and molecules not only on the surface, but also in the bulk of a material. The chemistry of MOFs has provided an extensive class of highly stable materials. Recent results on the development and synthesis of MOFs have made it possible to carry out fundamental and applied research. MOFs are very promising for application in adsorption separation, design of sensors, membranes, and gas sorbents, purification and storage of gases, design of telecommunication and industrial electronic devices, insulating materials.","PeriodicalId":104362,"journal":{"name":"2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves","volume":"19 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":"128296491","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.2013.6622011
V. S. Bulygin, A. Vukovic, P. Sewell, T. Benson
Dielectric resonators are used in a variety of application, including filters, oscillators, frequencies meters and tuned amplifiers. To date, a range of approximate semi-analytical methods have been used to model microwave dielectric resonators, namely magnetic wall method [1], variational method [2], and various integral equation methods [3,4]. Of special interest are the contour IE methods that use the Muller IEs and the Method of Analytical Regularisation (MAR) [5,6] to convert the original equations set to the matrix equations with more favourable features, namely to the Fredholm type equations of the second kind.conditions imposed on the disk median section [7]. Our main objective is to extend the Muller IEs to the full 3D case without making any approximating assumptions. In this paper we present a valuable intermediate step, namely method based on the combination of Muller IE and the Body of Revolution (BOR) approach [4]. The BOR method is IE based method that is applicable to bodies that possess axial (rotational) symmetry and can thus be obtained by rotating a so-called generic arc around the axis of symmetry.
{"title":"Axially symmetric eigenvalue problem for a dielectric body","authors":"V. S. Bulygin, A. Vukovic, P. Sewell, T. Benson","doi":"10.1109/MSMW.2013.6622011","DOIUrl":"https://doi.org/10.1109/MSMW.2013.6622011","url":null,"abstract":"Dielectric resonators are used in a variety of application, including filters, oscillators, frequencies meters and tuned amplifiers. To date, a range of approximate semi-analytical methods have been used to model microwave dielectric resonators, namely magnetic wall method [1], variational method [2], and various integral equation methods [3,4]. Of special interest are the contour IE methods that use the Muller IEs and the Method of Analytical Regularisation (MAR) [5,6] to convert the original equations set to the matrix equations with more favourable features, namely to the Fredholm type equations of the second kind.conditions imposed on the disk median section [7]. Our main objective is to extend the Muller IEs to the full 3D case without making any approximating assumptions. In this paper we present a valuable intermediate step, namely method based on the combination of Muller IE and the Body of Revolution (BOR) approach [4]. The BOR method is IE based method that is applicable to bodies that possess axial (rotational) symmetry and can thus be obtained by rotating a so-called generic arc around the axis of symmetry.","PeriodicalId":104362,"journal":{"name":"2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves","volume":"39 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":"116493390","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.2013.6622062
S. Kishko, S. Ponomarenko, A. Kuleshov, B. Yefimov, M. Glyavin, I. Zotova, I. Zheleznov, N. Ginzburg, V. Manuilov, V. Zaslavsky
The planar magnetron injection gun (MIG) was designed for a planar gyrotron with transverse energy extraction [1,2]. This MIG forms a sheet helical electron beam (HEB) with a high value of the pitch-factor [3] at accelerating voltage of 12 kV and current of 1A. The geometry of the designed MIG is shown in Figure 1.
{"title":"Optimization of a magnetron-injection gun for a planar gyrotron","authors":"S. Kishko, S. Ponomarenko, A. Kuleshov, B. Yefimov, M. Glyavin, I. Zotova, I. Zheleznov, N. Ginzburg, V. Manuilov, V. Zaslavsky","doi":"10.1109/MSMW.2013.6622062","DOIUrl":"https://doi.org/10.1109/MSMW.2013.6622062","url":null,"abstract":"The planar magnetron injection gun (MIG) was designed for a planar gyrotron with transverse energy extraction [1,2]. This MIG forms a sheet helical electron beam (HEB) with a high value of the pitch-factor [3] at accelerating voltage of 12 kV and current of 1A. The geometry of the designed MIG is shown in Figure 1.","PeriodicalId":104362,"journal":{"name":"2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves","volume":"165-166 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":"130661854","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.2013.6622066
V. Kurin, M. Demchenko, Y. Senkevich
The analysis of experimental data has shown that, the klinotron effects in DRO's (diffraction radiation oscillator) always are associated. It can have a very significant effect on the output power of the DRO. The klinotron effects always have a negative or a positive impact on the strength of the beam interaction with a high-frequency field. The use of deflecting electrodes or disperse bevels for entering the electron beam in the interaction space of DRO allows to reduce starting current and magnetic focusing field, increase output power and efficiency of DRO.
{"title":"Klinotron effect in Diffraction Radiation Oscillator","authors":"V. Kurin, M. Demchenko, Y. Senkevich","doi":"10.1109/MSMW.2013.6622066","DOIUrl":"https://doi.org/10.1109/MSMW.2013.6622066","url":null,"abstract":"The analysis of experimental data has shown that, the klinotron effects in DRO's (diffraction radiation oscillator) always are associated. It can have a very significant effect on the output power of the DRO. The klinotron effects always have a negative or a positive impact on the strength of the beam interaction with a high-frequency field. The use of deflecting electrodes or disperse bevels for entering the electron beam in the interaction space of DRO allows to reduce starting current and magnetic focusing field, increase output power and efficiency of DRO.","PeriodicalId":104362,"journal":{"name":"2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves","volume":"1 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":"134215232","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.2013.6622121
A. Fomichev, A. Manturov
Modeling of qualitative and quantitative characteristics of the microwave dielectric materials processing is an actual problem of modern microwave technology. In this paper, the numerical model of the microwave processing (drying) of the dielectric (eg, stacks of industrial wood, sawn timber etc) in the batch mode microwave dryers with ray type unlimited chamber (or with traveling wave chamber), is discussed. Earlier, a similar model has been proposed on the basis of the phenomenological approach. However, the model describes only the kinetics of the drying process.
{"title":"1D numerical model of microwave wood drying dynamics formalised as initial value problem","authors":"A. Fomichev, A. Manturov","doi":"10.1109/MSMW.2013.6622121","DOIUrl":"https://doi.org/10.1109/MSMW.2013.6622121","url":null,"abstract":"Modeling of qualitative and quantitative characteristics of the microwave dielectric materials processing is an actual problem of modern microwave technology. In this paper, the numerical model of the microwave processing (drying) of the dielectric (eg, stacks of industrial wood, sawn timber etc) in the batch mode microwave dryers with ray type unlimited chamber (or with traveling wave chamber), is discussed. Earlier, a similar model has been proposed on the basis of the phenomenological approach. However, the model describes only the kinetics of the drying process.","PeriodicalId":104362,"journal":{"name":"2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves","volume":"10 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":"134600390","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.2013.6622197
A. V. Aksenchyk, V. Yeryomka, I. F. Kirinovich, A. Kurayev
Simulation of mm-and submm-wave amplifiers is performed. A mathematical model is formulated with regard to both the space charge of sheet beams and field sagging in gaps. The power gain of orbictro-klystron (orboklystron) amplifiers is shown to be as high as 20-30 dB at frequencies of 100 to 200 GHz.
{"title":"Millimeter- and submillimeter-wave amplifiers on sheet-beam orboklystron","authors":"A. V. Aksenchyk, V. Yeryomka, I. F. Kirinovich, A. Kurayev","doi":"10.1109/MSMW.2013.6622197","DOIUrl":"https://doi.org/10.1109/MSMW.2013.6622197","url":null,"abstract":"Simulation of mm-and submm-wave amplifiers is performed. A mathematical model is formulated with regard to both the space charge of sheet beams and field sagging in gaps. The power gain of orbictro-klystron (orboklystron) amplifiers is shown to be as high as 20-30 dB at frequencies of 100 to 200 GHz.","PeriodicalId":104362,"journal":{"name":"2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves","volume":"63 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":"132114625","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.2013.6622056
G. Veselovska
Remote sounding of precipitations is of great interest to study processes in atmosphere. At that double-frequency sounding is widely used [1] which based on calculation of differential radar cross section (DRCS). But the most of published works are performed in the assumption of spherical drops, while the shape of real particles essentially differs. This greatly affects on scattering characteristics and that is why the study of ellipsoidal drops is of considerable interest.But scattering of electronmagnetics waves from nonsperical drops is quite difficult and requires large computational resources. Therefore we used the approximation of dipole scattering to solve the problem of double-frequency sounding in the framework of the Pruppacher model. So the goal of the present paper is the study of electromagnetic scattering on ellispoidal drops in the case of double-frequency sounding of polidisperse medium (medium of different size drops).
{"title":"Research of polydisperse medium by double-frequency radar","authors":"G. Veselovska","doi":"10.1109/MSMW.2013.6622056","DOIUrl":"https://doi.org/10.1109/MSMW.2013.6622056","url":null,"abstract":"Remote sounding of precipitations is of great interest to study processes in atmosphere. At that double-frequency sounding is widely used [1] which based on calculation of differential radar cross section (DRCS). But the most of published works are performed in the assumption of spherical drops, while the shape of real particles essentially differs. This greatly affects on scattering characteristics and that is why the study of ellipsoidal drops is of considerable interest.But scattering of electronmagnetics waves from nonsperical drops is quite difficult and requires large computational resources. Therefore we used the approximation of dipole scattering to solve the problem of double-frequency sounding in the framework of the Pruppacher model. So the goal of the present paper is the study of electromagnetic scattering on ellispoidal drops in the case of double-frequency sounding of polidisperse medium (medium of different size drops).","PeriodicalId":104362,"journal":{"name":"2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves","volume":"87 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":"133718828","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.2013.6622068
A. Litvak, V. Myasnikov, G. Denisov, E. Tai, V. Zapevalov, M. Agapova, A. Chirkov, A. Kuftin, V. Nichiporenko, L. Popov, E. Soluyanova, S. Usachev
Modern high power gyrotron is capable to generate RF radiation of a power up to (1-1.5) MW with total efficiency of (45-60)% at a frequency range of (30-170) GHz in quasi-CW regime providing pulse duration up to 1000 s. These unique parameters can be achieved first of all due to effective interaction of stable helical electron beam transported through oversized cylindrical resonator in a strong magnetic field and adequate cooling of all heated surfaces inside tube. Gyrotron is rigged with such important components as depressed collector, high-efficient built-in quasi-optical converter of high-order operating resonator mode into paraxial wave beam, and output window with disc of CVD diamond. All these elements aimed to decrease power dissipation inside tube, and thus make long pulse/CW/1MW operation of gyrotron reliable enough.
{"title":"Russian gyrotrons of MW power level in MM frequency band","authors":"A. Litvak, V. Myasnikov, G. Denisov, E. Tai, V. Zapevalov, M. Agapova, A. Chirkov, A. Kuftin, V. Nichiporenko, L. Popov, E. Soluyanova, S. Usachev","doi":"10.1109/MSMW.2013.6622068","DOIUrl":"https://doi.org/10.1109/MSMW.2013.6622068","url":null,"abstract":"Modern high power gyrotron is capable to generate RF radiation of a power up to (1-1.5) MW with total efficiency of (45-60)% at a frequency range of (30-170) GHz in quasi-CW regime providing pulse duration up to 1000 s. These unique parameters can be achieved first of all due to effective interaction of stable helical electron beam transported through oversized cylindrical resonator in a strong magnetic field and adequate cooling of all heated surfaces inside tube. Gyrotron is rigged with such important components as depressed collector, high-efficient built-in quasi-optical converter of high-order operating resonator mode into paraxial wave beam, and output window with disc of CVD diamond. All these elements aimed to decrease power dissipation inside tube, and thus make long pulse/CW/1MW operation of gyrotron reliable enough.","PeriodicalId":104362,"journal":{"name":"2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves","volume":"20 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":"116245154","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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