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Analytical Solution of the Problem of Synthesis of Three-Link Stepped Chebyshev’s Microwave Filter 三链路阶跃切比雪夫微波滤波器合成问题的解析解
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-08-29 DOI: 10.1134/s1063785023180025
A. S. Aref’ev
{"title":"Analytical Solution of the Problem of Synthesis of Three-Link Stepped Chebyshev’s Microwave Filter","authors":"A. S. Aref’ev","doi":"10.1134/s1063785023180025","DOIUrl":"https://doi.org/10.1134/s1063785023180025","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The problem of synthesis of the three-link stepped Chebyshev’s microwave filter is reduced to two independent fourth-degree equations, including a single link wave impedance as unknown. The solution of Descartes—Euler is applied to these equations. It is proved that, in case wave impedances of extreme links are equal, the problem of the filter synthesis has two solutions. Identical phase-frequency responses correspond to these solutions. It is proved that for each link a product of the wave impedances relating to these solutions is equal to a square of the wave impedance of the transmission line including the filter.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Influence of Irradiation with Accelerated Electrons on the Physical Properties of Polyethylene Terephthalate 加速电子辐照对聚对苯二甲酸乙二醇酯物理特性的影响
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-08-29 DOI: 10.1134/s1063785023170200
V. A. Sharapova, I. S. Kamantsev, V. P. Shveikin, V. Yu. Ivanov, O. V. Ryaboukhin
{"title":"Influence of Irradiation with Accelerated Electrons on the Physical Properties of Polyethylene Terephthalate","authors":"V. A. Sharapova, I. S. Kamantsev, V. P. Shveikin, V. Yu. Ivanov, O. V. Ryaboukhin","doi":"10.1134/s1063785023170200","DOIUrl":"https://doi.org/10.1134/s1063785023170200","url":null,"abstract":"<p><b>Abstract</b>—The influence of irradiation with accelerated electrons (energy 8.5 MeV, dose 5 kGy) on the physical properties of medical devices made of polyethylene terephthalate (PET) was studied by infrared (IR) spectroscopy. The revealed post-irradiation changes in the IR spectra can be used to justify the choice of the dose of irradiation of PET products with electrons during the radiation sterilization procedure.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The Initial Stages of the Formation of a Pulsed Discharge in a Gap with a Tip–Plane Geometry in Preionized Argon 在预电离氩气中具有尖端平面几何形状的间隙中形成脉冲放电的初始阶段
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-08-29 DOI: 10.1134/s1063785023170169
V. S. Kurbanismailov, D. V. Tereshonok, G. B. Ragimkhanov, Z. R. Khalikova
{"title":"The Initial Stages of the Formation of a Pulsed Discharge in a Gap with a Tip–Plane Geometry in Preionized Argon","authors":"V. S. Kurbanismailov, D. V. Tereshonok, G. B. Ragimkhanov, Z. R. Khalikova","doi":"10.1134/s1063785023170169","DOIUrl":"https://doi.org/10.1134/s1063785023170169","url":null,"abstract":"<p><b>Abstract</b>—The study of the effect of the initial conditions on the features of the formation and development of the anodic ionization wave between two electrodes with a tip–plane gap geometry in argon at atmospheric pressure is performed on the basis of a two-dimensional axisymmetric drift-diffusion model.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Enhancing Hydrophobic Properties of ZnO Structures Using Gold Coatings 利用金涂层增强氧化锌结构的疏水特性
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-08-29 DOI: 10.1134/s1063785023180128
A. E. Muslimov, V. M. Kanevsky
{"title":"Enhancing Hydrophobic Properties of ZnO Structures Using Gold Coatings","authors":"A. E. Muslimov, V. M. Kanevsky","doi":"10.1134/s1063785023180128","DOIUrl":"https://doi.org/10.1134/s1063785023180128","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The effect of enhancement the hydrophobic properties of the ensemble of micro- and nanostructures ZnO as a result of coating with gold was discovered. For the first time, it has been shown that coating the ensemble with a micro- and nanoparticle ZnO layer of gold leads to a sharp increase in the wetting edge angle from 145° to 168° (water drop volume 5 mm<sup>3</sup>) and a decrease in the hydrophobicity/hydrophilicity transition time under ultraviolet irradiation.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Relativistic Backward-Wave Oscillator with Longitudinal-Slotted Diffraction Output 带纵向槽式衍射输出的相对论反向波振荡器
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-08-29 DOI: 10.1134/s1063785023180062
V. V. Kladukhin, S. P. Khramtsov, V. Yu. Yalov
{"title":"Relativistic Backward-Wave Oscillator with Longitudinal-Slotted Diffraction Output","authors":"V. V. Kladukhin, S. P. Khramtsov, V. Yu. Yalov","doi":"10.1134/s1063785023180062","DOIUrl":"https://doi.org/10.1134/s1063785023180062","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The results of experimental studies evaluating the influence of longitudinal slits in a conical diffraction outlet, combined with an electron collector, of a 10 GHz relativistic BWO (Backward-Wave Oscillator) with an operating mode TM<sub>01</sub> are presented. It has been shown experimentally that replacing a solid conical waveguide with a similar longitudinal-slotted waveguide has little effect on the performance of the BWO. The use of a longitudinally slotted diffraction outlet instead of a continuous one makes it possible to reduce the volume of plasma and microparticles formed on the diffraction outlet surface under the action of an electron beam, and to improve their adsorption and removal.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Analysis of Supercavities Formed in Water by a Group of Strikers during High-Speed Motion 分析高速运动过程中一组击剑在水中形成的超级空洞
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-08-29 DOI: 10.1134/s1063785023170108
A. N. Ishchenko, V. V. Burkin, A. S. D’yachkovskii, A. V. Chupashev, A. Yu. Sammel’, K. S. Rogaev, A. D. Sidorov
{"title":"Analysis of Supercavities Formed in Water by a Group of Strikers during High-Speed Motion","authors":"A. N. Ishchenko, V. V. Burkin, A. S. D’yachkovskii, A. V. Chupashev, A. Yu. Sammel’, K. S. Rogaev, A. D. Sidorov","doi":"10.1134/s1063785023170108","DOIUrl":"https://doi.org/10.1134/s1063785023170108","url":null,"abstract":"<p><b>Abstract</b>—The analysis of supercavities formed during the high-speed motion in water of two closely spaced supercavitating strikers is performed. By comparing geometric characteristics of supercavities, the possibility of qualitative assessment of influence degree of closely spaced strikers on each other is shown. By the example of two strikers, the characteristic distance between them was determined, at which the minimum mutual influence of the strikers on each other is observed.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Elastic Interaction of Quantum Disks in Hybrid QD/NW Structures 混合 QD/NW 结构中量子盘的弹性相互作用
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-08-29 DOI: 10.1134/s1063785023180177
A. E. Romanov, A. L. Kolesnikova, M. Yu. Gutkin, V. E. Bougrov
{"title":"Elastic Interaction of Quantum Disks in Hybrid QD/NW Structures","authors":"A. E. Romanov, A. L. Kolesnikova, M. Yu. Gutkin, V. E. Bougrov","doi":"10.1134/s1063785023180177","DOIUrl":"https://doi.org/10.1134/s1063785023180177","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The elastic interaction of quantum disks (QDs) in a nanowire (NW), i.e., in a hybrid QD/NW structure with sharp heterointerfaces, is considered for the first time. Within the framework of the defect micromechanics approach, the energy of QD pair interaction is established and it is demonstrated that for QDs with a lattice misfit of the same sign, a zone of attraction to each other appears, depending on the ratio of the QD axial size to the NW radius. The discovered effect should be taken into account when choosing the modes of formation of hybrid QD/NW structures and in models explaining their properties.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142223762","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Amorphization of Silicon Nanowires upon Irradiation with Argon Ions 氩离子照射下硅纳米线的非晶化现象
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-08-29 DOI: 10.1134/s1063785023170121
A. V. Kononina, Yu. V. Balakshin, K. A. Gonchar, I. V. Bozhev, A. A. Shemukhin, V. S. Chernysh
{"title":"Amorphization of Silicon Nanowires upon Irradiation with Argon Ions","authors":"A. V. Kononina, Yu. V. Balakshin, K. A. Gonchar, I. V. Bozhev, A. A. Shemukhin, V. S. Chernysh","doi":"10.1134/s1063785023170121","DOIUrl":"https://doi.org/10.1134/s1063785023170121","url":null,"abstract":"<p><b>Abstract</b>—The irradiation of silicon nanowires with Ar<sup>+</sup> ions with the energy of 250 keV and fluences of 10<sup>13</sup> to 10<sup>16</sup> cm<sup>–2</sup> was carried out. The dependence of the destruction of the structure under ion irradiation on the fluence was investigated by Raman spectroscopy. It was shown that the amorphization of porous silicon occurs at higher values of displacement per atom than in thin silicon films.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Comparative Study of Electrochromic Properties of Polyaniline–Polyacid Layers Prepared by Spray-Coating and Drop-Casting Methods with Adding Carbon Nanotubes 添加碳纳米管的喷涂法和滴注法制备的聚苯胺-聚酸层电致变色性能比较研究
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-08-29 DOI: 10.1134/s106378502318013x
A. A. Nekrasov, O. L. Gribkova, T. V. Krivenko
{"title":"Comparative Study of Electrochromic Properties of Polyaniline–Polyacid Layers Prepared by Spray-Coating and Drop-Casting Methods with Adding Carbon Nanotubes","authors":"A. A. Nekrasov, O. L. Gribkova, T. V. Krivenko","doi":"10.1134/s106378502318013x","DOIUrl":"https://doi.org/10.1134/s106378502318013x","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The influence of the coating method (spray-coating or drop-casting onto horizontal substrate) on the electrochromic characteristics of the layers of water-soluble polyaniline–polyacid complex was investigated. It was shown that, in the case of adding single-wall nanotubes, the polyaniline–polyacid layers prepared by the scalable spray-coating technology demonstrate high coloration speed and electrochromic efficiency.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Determination of Thickness and Doping Features of Multilayer 4H-SiC Structures by Frequency Analysis of IR Reflection Spectra 通过红外反射光谱的频率分析确定多层 4H-SiC 结构的厚度和掺杂特征
IF 0.6 4区 物理与天体物理
Technical Physics Letters Pub Date : 2024-08-29 DOI: 10.1134/s1063785023180013
A. V. Afanasjev, V. I. Zubkov, V. A. Ilyin, V. V. Luchinin, M. V. Pavlova, M. F. Panov, V. V. Trushliakova, D. D. Firsov
{"title":"Determination of Thickness and Doping Features of Multilayer 4H-SiC Structures by Frequency Analysis of IR Reflection Spectra","authors":"A. V. Afanasjev, V. I. Zubkov, V. A. Ilyin, V. V. Luchinin, M. V. Pavlova, M. F. Panov, V. V. Trushliakova, D. D. Firsov","doi":"10.1134/s1063785023180013","DOIUrl":"https://doi.org/10.1134/s1063785023180013","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>A technique has been developed for frequency analysis of the IR reflection spectrum to determine the thickness and order of the layers in the epitaxial structure of silicon carbide. Calculations for the 4<i>H</i>-SiC epitaxial structure have been performed. The method has been shown to be highly sensitive to optical boundaries resulting from a sequential increase in the doping level during the layer growth.</p>","PeriodicalId":784,"journal":{"name":"Technical Physics Letters","volume":null,"pages":null},"PeriodicalIF":0.6,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142179512","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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