Pub Date : 2013-06-23DOI: 10.1109/MSMW.2013.6622025
V. A. Abdulkadyrov
The electron-wave interactions in the composite periodic semiconductors has been investigated. The dependencies for the films of the InSb, GaAs structures has been shown. The wave interaction in the space-periodic structure with the 2-dimentional electronic gas has been investigated.
{"title":"Waves in active and passive sub-micron semiconductor structure. Detection and generation of the terahertz waves","authors":"V. A. Abdulkadyrov","doi":"10.1109/MSMW.2013.6622025","DOIUrl":"https://doi.org/10.1109/MSMW.2013.6622025","url":null,"abstract":"The electron-wave interactions in the composite periodic semiconductors has been investigated. The dependencies for the films of the InSb, GaAs structures has been shown. The wave interaction in the space-periodic structure with the 2-dimentional electronic gas has been investigated.","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":"132057080","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.2013.6622160
V. Ponomaryov
The presence of noise produces deficiencies during acquisition, broadcast or storage of the color image sequences. A principal problem here consists in a design of the noise reduction techniques while image content (edges, fine details, chromaticity characteristics, etc.) should be unchanged. There are many filters designed that are based on order statistics technique, on fuzzy logic theory, etc. The proposed technique in difference to other state-of-the-arts approaches employs the RGB channels data and fuzzy logic description of semantic properties of image features, processing several pixel gradients together in two temporal neighboring frames. A 3×3 sliding window located into a bigger 5×5 window novel framework is employed in an approach, applying the gradient values for neighboring pixels in eight different directions γ = (NW, N, NE, E, SE, S, SW, W) with respect to a central pixel. Two hypothesizes are resolved: the central pixel is a noisy or it is a free-noise pixel. The LARGE and SMALL fuzzy sets are introduced with an objective to estimate the noise contamination employing the Gaussian membership functions for membership degrees of gradient values.
噪声的存在在彩色图像序列的采集、广播或存储过程中产生缺陷。这里的一个主要问题是在图像内容(边缘、精细细节、色度特征等)保持不变的情况下设计降噪技术。基于序统计技术、模糊逻辑理论等设计了许多滤波器。与其他先进方法不同的是，该技术采用RGB通道数据和图像特征语义属性的模糊逻辑描述，在两个相邻的时间帧中一起处理多个像素梯度。该方法采用了一个3×3滑动窗口，该窗口位于一个更大的5×5窗口框架中，该方法对中心像素在八个不同方向(γ = (NW, N, NE, E, SE, S, SW, W)上的相邻像素应用梯度值。解决了两个假设:中心像素是一个有噪声的像素或它是一个无噪声像素。引入了LARGE和SMALL模糊集，目的是利用高斯隶属函数对梯度值的隶属度进行噪声污染估计。
{"title":"Novel methods in denoising, resolution enhancement and object reconstruction of multidimensional signals","authors":"V. Ponomaryov","doi":"10.1109/MSMW.2013.6622160","DOIUrl":"https://doi.org/10.1109/MSMW.2013.6622160","url":null,"abstract":"The presence of noise produces deficiencies during acquisition, broadcast or storage of the color image sequences. A principal problem here consists in a design of the noise reduction techniques while image content (edges, fine details, chromaticity characteristics, etc.) should be unchanged. There are many filters designed that are based on order statistics technique, on fuzzy logic theory, etc. The proposed technique in difference to other state-of-the-arts approaches employs the RGB channels data and fuzzy logic description of semantic properties of image features, processing several pixel gradients together in two temporal neighboring frames. A 3×3 sliding window located into a bigger 5×5 window novel framework is employed in an approach, applying the gradient values for neighboring pixels in eight different directions γ = (NW, N, NE, E, SE, S, SW, W) with respect to a central pixel. Two hypothesizes are resolved: the central pixel is a noisy or it is a free-noise pixel. The LARGE and SMALL fuzzy sets are introduced with an objective to estimate the noise contamination employing the Gaussian membership functions for membership degrees of gradient values.","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":"133349426","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.2013.6622045
Y. Gorishnya
Statistical analysis of experimental records of tweek-atmospherics (tweeks) was produced. Tweeks are observed during nighttime and represent response of the Earth-ionosphere waveguide to excitation by lightning strokes. Tweeks are formed by series of pulses consecutively reflected from the waveguide boundaries under different incident angles depending on a source-observer distance and effective ionosphere height along a propagation path. The tweek signals demonstrate the propagation of a few Earth-ionosphere waveguide modes. We used a time-frequency representation of analyzed tweek waveforms to infer separate branches, corresponding to different waveguide modes. We determined then propagation path's parameters such as source range, ionosphere height, and azimuthal orientation of a propagation path. Obtained results show the increase of effective height of a reflecting layer in low ionosphere during the night from evening until 3 hour after local midnight. These data also demonstrate the number of branches equal 2...4 in case of effective ionosphere height > 90 km and source range more than 1 Mm. In conjunction with effective height's rise this fact tends to decreasing of average branch quantity in the tweeks observed about few hours after local midnight.
{"title":"Variations of the lower ionosphere height deduced from measurements of tweek-atmospherics","authors":"Y. Gorishnya","doi":"10.1109/MSMW.2013.6622045","DOIUrl":"https://doi.org/10.1109/MSMW.2013.6622045","url":null,"abstract":"Statistical analysis of experimental records of tweek-atmospherics (tweeks) was produced. Tweeks are observed during nighttime and represent response of the Earth-ionosphere waveguide to excitation by lightning strokes. Tweeks are formed by series of pulses consecutively reflected from the waveguide boundaries under different incident angles depending on a source-observer distance and effective ionosphere height along a propagation path. The tweek signals demonstrate the propagation of a few Earth-ionosphere waveguide modes. We used a time-frequency representation of analyzed tweek waveforms to infer separate branches, corresponding to different waveguide modes. We determined then propagation path's parameters such as source range, ionosphere height, and azimuthal orientation of a propagation path. Obtained results show the increase of effective height of a reflecting layer in low ionosphere during the night from evening until 3 hour after local midnight. These data also demonstrate the number of branches equal 2...4 in case of effective ionosphere height > 90 km and source range more than 1 Mm. In conjunction with effective height's rise this fact tends to decreasing of average branch quantity in the tweeks observed about few hours after local midnight.","PeriodicalId":104362,"journal":{"name":"2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves","volume":"37 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":"131903166","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.2013.6622203
A. Rinkevich, D. V. Perov, M. Samoylovich, S. М. Klescheva, E. Kuznetsov
Photonic crystals become fashionable object of investigation on microwaves and the interest is caused both basic scientific aspects and possible applications [1]. Reflection, transmission and absorption properties are under study [2]. Microwave methods give a unique opportunity to estimate the dynamic and relaxation parameters of spins in a nanostructure. Magnetic properties of magnetophotonic crystals based on opal matrices have been studied as well as their electromagnetic properties in millimeter waveband. Cobalt nanoparticles could be suitable magnetic component of a magnetophotonic crystal. The particles of cobalt oxide are embedded into the inter-sphere voids of the matrix. After annealing in hydrogen the cobalt oxide particles transform to metallic cobalt. It has been shown that if antiferromagnetic cobalt oxide remains besides ferromagnetic cobalt, the lowtemperature magnetic hysteresis loop is shifted along the field axis. Magnetic field influences essentially on the microwave transmission and reflection coefficients only after annealing in hydrogen that is if the ferromagnetic phase presents in the sample. The spectra of magnetic resonance and antiresonance are studied.
{"title":"Microwave penetration and magnetic state of cobalt-containing magnetophotonic crystals","authors":"A. Rinkevich, D. V. Perov, M. Samoylovich, S. М. Klescheva, E. Kuznetsov","doi":"10.1109/MSMW.2013.6622203","DOIUrl":"https://doi.org/10.1109/MSMW.2013.6622203","url":null,"abstract":"Photonic crystals become fashionable object of investigation on microwaves and the interest is caused both basic scientific aspects and possible applications [1]. Reflection, transmission and absorption properties are under study [2]. Microwave methods give a unique opportunity to estimate the dynamic and relaxation parameters of spins in a nanostructure. Magnetic properties of magnetophotonic crystals based on opal matrices have been studied as well as their electromagnetic properties in millimeter waveband. Cobalt nanoparticles could be suitable magnetic component of a magnetophotonic crystal. The particles of cobalt oxide are embedded into the inter-sphere voids of the matrix. After annealing in hydrogen the cobalt oxide particles transform to metallic cobalt. It has been shown that if antiferromagnetic cobalt oxide remains besides ferromagnetic cobalt, the lowtemperature magnetic hysteresis loop is shifted along the field axis. Magnetic field influences essentially on the microwave transmission and reflection coefficients only after annealing in hydrogen that is if the ferromagnetic phase presents in the sample. The spectra of magnetic resonance and antiresonance are studied.","PeriodicalId":104362,"journal":{"name":"2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves","volume":"25 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":"133482130","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.2013.6622149
O. Lebedeva, E. Martinez Vera, V. Golikov, M. Rodríguez Blanco
This work presents a novel generalized likelihood ratio (GLR) methodology to design a detection algorithm for a sequence of images in the presence of Gaussian structured background and noise. We focus on the detection of a subpixel target both with small target's energy and without it (dark target). It is assumed that the background power is known a priori under the null hypothesis and is unknown under the alternative hypothesis. This situation is typical in the case of subpixel detection. We derive the GLR test (GLRT) for this problem. The designed detector is theoretically justified and numerically evaluated. The structure of the designed detector consists of two detectors. The first detector is the known matched subspace detector and the second is the background's power change detector. The second detector help to detect the black subpixel targets (without reflected energy). Both the theoretical and computer simulation results have shown that the proposed detector outperforms the conventional one.
{"title":"Video-based detection of subpixel no-reflecting objects in the presence of fluctuated background","authors":"O. Lebedeva, E. Martinez Vera, V. Golikov, M. Rodríguez Blanco","doi":"10.1109/MSMW.2013.6622149","DOIUrl":"https://doi.org/10.1109/MSMW.2013.6622149","url":null,"abstract":"This work presents a novel generalized likelihood ratio (GLR) methodology to design a detection algorithm for a sequence of images in the presence of Gaussian structured background and noise. We focus on the detection of a subpixel target both with small target's energy and without it (dark target). It is assumed that the background power is known a priori under the null hypothesis and is unknown under the alternative hypothesis. This situation is typical in the case of subpixel detection. We derive the GLR test (GLRT) for this problem. The designed detector is theoretically justified and numerically evaluated. The structure of the designed detector consists of two detectors. The first detector is the known matched subspace detector and the second is the background's power change detector. The second detector help to detect the black subpixel targets (without reflected energy). Both the theoretical and computer simulation results have shown that the proposed detector outperforms the conventional one.","PeriodicalId":104362,"journal":{"name":"2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves","volume":"47 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":"123698658","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.2013.6622166
V. Skresanov, A. Barannik, N. Cherpak, Y. He, V. Glamazdin, V. Zolotaryov, A. Shubny, L. Sun, J. Wang, Y. Wu
This paper presents the results of the design and testing of seven-pole BPF Ka band with bilateral HTS insert in the E-plane rectangular waveguide. Study of the possibility of reducing the insertion loss in the E-plane filters with HTS inserts compared with losses in the filters with normal metal inserts is a purpose of the work. HTS insert is a single crystal MgO substrate of 0.5 mm thickness, of which the two surfaces are coated with superconducting YBCO films. By photolithography method, identical insert portions of the superconducting layers were removed on both sides of a substrate and thereby "window” chains were formed with a height equal to the height of the standard rectangular waveguide of 7.2x3.4 mm2 section. The lengths of all "windows" and the distance between them along the axis OZ were calculated as a result of designing the filter. Therefore, individual resonators of seven-pole BPF are rectangular waveguide sections with dielectric MgO plates in the E-plane. The mutual coupling between the resonators and the coupling of the first and the last resonators with matched waveguide are carried out by means of pairs of the below-cutoff waveguide sections formed by the original walls of the waveguide and the conducting YBCO layers. It is clear that the principle of operation of the filter with HTS insert analogous to the principle of BPF widely used in practice with normal metal E-plane inserts.
{"title":"Experience in developing Ka-band waveguide filter with HTS E-plane insert","authors":"V. Skresanov, A. Barannik, N. Cherpak, Y. He, V. Glamazdin, V. Zolotaryov, A. Shubny, L. Sun, J. Wang, Y. Wu","doi":"10.1109/MSMW.2013.6622166","DOIUrl":"https://doi.org/10.1109/MSMW.2013.6622166","url":null,"abstract":"This paper presents the results of the design and testing of seven-pole BPF Ka band with bilateral HTS insert in the E-plane rectangular waveguide. Study of the possibility of reducing the insertion loss in the E-plane filters with HTS inserts compared with losses in the filters with normal metal inserts is a purpose of the work. HTS insert is a single crystal MgO substrate of 0.5 mm thickness, of which the two surfaces are coated with superconducting YBCO films. By photolithography method, identical insert portions of the superconducting layers were removed on both sides of a substrate and thereby \"window” chains were formed with a height equal to the height of the standard rectangular waveguide of 7.2x3.4 mm2 section. The lengths of all \"windows\" and the distance between them along the axis OZ were calculated as a result of designing the filter. Therefore, individual resonators of seven-pole BPF are rectangular waveguide sections with dielectric MgO plates in the E-plane. The mutual coupling between the resonators and the coupling of the first and the last resonators with matched waveguide are carried out by means of pairs of the below-cutoff waveguide sections formed by the original walls of the waveguide and the conducting YBCO layers. It is clear that the principle of operation of the filter with HTS insert analogous to the principle of BPF widely used in practice with normal metal E-plane inserts.","PeriodicalId":104362,"journal":{"name":"2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves","volume":"69 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":"124983021","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.2013.6621990
T. Idehara, S. Sabchevski
Powerful sources of coherent radiation in the sub-terahertz to terahertz frequency range are required for expanding number of applications in the physical research and in various advanced high power THz technologies. In recent years, a spectacular progress in the development of various gyro-devices and in particular, the powerful high frequency (sub-terahertz to terahertz) gyrotron oscillators has demonstrated a remarkable potential for bridging the so-called terahertz power gap and stimulated many novel and prospective applications. In this paper, we outline two series of such gyro-devices, namely the Gyrotron FU Series which includes pulsed gyrotrons and Gyrotron FU CW Series which consist of CW (continuous wave) or long pulse gurotrons. Both series are developed at Research Center for Development of Far Infrared Region, University of Fukui (FIR FU). We present the most remarkable achievements of these devices and illustrate their applications by some characteristic examples. An outlook for the further extension of the Gyrotron FU CW Series is also provided.
{"title":"Development of high frequency Gyrotrons in FIR FU covering sub-THz to THz range for applications to high power THz spectroscopy","authors":"T. Idehara, S. Sabchevski","doi":"10.1109/MSMW.2013.6621990","DOIUrl":"https://doi.org/10.1109/MSMW.2013.6621990","url":null,"abstract":"Powerful sources of coherent radiation in the sub-terahertz to terahertz frequency range are required for expanding number of applications in the physical research and in various advanced high power THz technologies. In recent years, a spectacular progress in the development of various gyro-devices and in particular, the powerful high frequency (sub-terahertz to terahertz) gyrotron oscillators has demonstrated a remarkable potential for bridging the so-called terahertz power gap and stimulated many novel and prospective applications. In this paper, we outline two series of such gyro-devices, namely the Gyrotron FU Series which includes pulsed gyrotrons and Gyrotron FU CW Series which consist of CW (continuous wave) or long pulse gurotrons. Both series are developed at Research Center for Development of Far Infrared Region, University of Fukui (FIR FU). We present the most remarkable achievements of these devices and illustrate their applications by some characteristic examples. An outlook for the further extension of the Gyrotron FU CW Series is also provided.","PeriodicalId":104362,"journal":{"name":"2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves","volume":"55 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":"125084316","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.2013.6622141
Yulia S. Dementieva
In this paper we present mathematical model and numerical algorithm allowing investigating two-dimensional and three-dimensional photonic crystals and waveguiding systems based on photonic crystals. We demonstrate spectral characteristic of photonic crystals and systems based on them.
{"title":"Mathematical modeling of waveguiding systems based on photonic crystals","authors":"Yulia S. Dementieva","doi":"10.1109/MSMW.2013.6622141","DOIUrl":"https://doi.org/10.1109/MSMW.2013.6622141","url":null,"abstract":"In this paper we present mathematical model and numerical algorithm allowing investigating two-dimensional and three-dimensional photonic crystals and waveguiding systems based on photonic crystals. We demonstrate spectral characteristic of photonic crystals and systems based on them.","PeriodicalId":104362,"journal":{"name":"2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves","volume":"86 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":"121344698","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.2013.6622082
A. Kirilenko, D. Kulik, S. Prikolotin, L. Rud, S. Steshenko
The attention to coaxial waveguide polarizers is caused due to developing multifrequency antenna systems, e.g. for radio telescopes, operating over two or more sufficiently spaced frequency bands. If the inner conductor is hollow and acts as a conventional circular waveguide, it can be used for transmitting a higher-frequency signal while the coaxial region provides the lower-frequency signal propagation. The further addition of outer cylindrical conductors allows increasing a corresponding number of frequency bands.
{"title":"Design and optimization of broadband ridged coaxial waveguide polarizers","authors":"A. Kirilenko, D. Kulik, S. Prikolotin, L. Rud, S. Steshenko","doi":"10.1109/MSMW.2013.6622082","DOIUrl":"https://doi.org/10.1109/MSMW.2013.6622082","url":null,"abstract":"The attention to coaxial waveguide polarizers is caused due to developing multifrequency antenna systems, e.g. for radio telescopes, operating over two or more sufficiently spaced frequency bands. If the inner conductor is hollow and acts as a conventional circular waveguide, it can be used for transmitting a higher-frequency signal while the coaxial region provides the lower-frequency signal propagation. The further addition of outer cylindrical conductors allows increasing a corresponding number of frequency bands.","PeriodicalId":104362,"journal":{"name":"2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves","volume":"53 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":"125302912","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.2013.6622074
V. Shcherbak
Acquired earlier experience of an optimization of the TE-waves converters we use for creation of TM-waves converters in flat (rectangular) waveguides, which are more interesting to usage in an electronics. We also optimize interaction of the TEM-wave with higher of TE- and TM-waves to create converters on the basis of the cascade from three unequally-period gratings in free-space. However there were difficulties of providing flat-topped (and from this broadband ) amplitude-frequency response of converters on TM- and TEM-waves. The search of modified constructions of such devices for overcoming these difficulties is necessary.
{"title":"Conversion of tem-wave in higher waves on the cascades from three unequally-period diaphragms or gratings","authors":"V. Shcherbak","doi":"10.1109/MSMW.2013.6622074","DOIUrl":"https://doi.org/10.1109/MSMW.2013.6622074","url":null,"abstract":"Acquired earlier experience of an optimization of the TE-waves converters we use for creation of TM-waves converters in flat (rectangular) waveguides, which are more interesting to usage in an electronics. We also optimize interaction of the TEM-wave with higher of TE- and TM-waves to create converters on the basis of the cascade from three unequally-period gratings in free-space. However there were difficulties of providing flat-topped (and from this broadband ) amplitude-frequency response of converters on TM- and TEM-waves. The search of modified constructions of such devices for overcoming these difficulties is necessary.","PeriodicalId":104362,"journal":{"name":"2013 International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter and Submillimeter Waves","volume":"4 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":"129034151","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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