Pub Date : 2022-11-14DOI: 10.1109/UkrMW58013.2022.10037144
L. Emelyanov
The results of observations of the motion of the ionospheric plasma over Ukraine during the partial (up to 37.8% of the Sun's area) solar eclipse on September 1, 2016, which occurred in the magnetically conjugate region for Kharkiv (near the island of Madagascar, 37° 35’ S, 47° 26’ E), and during June 10, 2021 partial (4.4% in area) solar eclipse over Kharkiv (49° 36’ N, 36° 18’ E) are presented. The Kharkiv incoherent scatter radar and digital ionosondes were used for these ionospheric observations. On September 1, 2016, changes were observed in the temporal variations of the vertical component of the ionospheric plasma drift velocity, which probably caused by the solar eclipse in the southern hemisphere and associated with the processes of interaction through the magnetosphere between the ionospheres of the magnetically conjugate regions of the Earth's southern and northern hemispheres. These changes were manifested in a decrease in the absolute value of the velocity of the downward motion of plasma in the ionosphere over Ukraine with an extremum 42 min after the maximum phase of the solar eclipse in the magnetically conjugate region. This effect is opposite to effect that generally caused by the solar eclipse over Kharkiv. The beginning of the velocity deviation coincided in time with the maximum phase of the solar eclipse, and the end was 1 h 16 min after the instant of greatest eclipse. The velocity deviation amplitude increased with altitude and amounted to 5–45 m/s at altitudes of 200–580 km. The velocity deviation was accompanied by a similar deviation in the temporal variation of the critical frequency with a maximum decrease of 0.7 MHz and in the temporal variation of ionospheric F2 peak height with a maximum increase of 30 km. The response of the ionosphere to the partial solar eclipse on June 10, 2021 with a small obscuration of the Sun (0.112 in diameter, 0.044 in area) at the studied altitudes of 180–500 km was very weak or absent at all, in contrast to results of previous observations of solar eclipses over Kharkiv with greater obscuration of the Sun's disk area (0.31 and more).
{"title":"Observation of Ionospheric Plasma Motion over Kharkiv During Solar Eclipses on September 1, 2016, and June 10, 2021","authors":"L. Emelyanov","doi":"10.1109/UkrMW58013.2022.10037144","DOIUrl":"https://doi.org/10.1109/UkrMW58013.2022.10037144","url":null,"abstract":"The results of observations of the motion of the ionospheric plasma over Ukraine during the partial (up to 37.8% of the Sun's area) solar eclipse on September 1, 2016, which occurred in the magnetically conjugate region for Kharkiv (near the island of Madagascar, 37° 35’ S, 47° 26’ E), and during June 10, 2021 partial (4.4% in area) solar eclipse over Kharkiv (49° 36’ N, 36° 18’ E) are presented. The Kharkiv incoherent scatter radar and digital ionosondes were used for these ionospheric observations. On September 1, 2016, changes were observed in the temporal variations of the vertical component of the ionospheric plasma drift velocity, which probably caused by the solar eclipse in the southern hemisphere and associated with the processes of interaction through the magnetosphere between the ionospheres of the magnetically conjugate regions of the Earth's southern and northern hemispheres. These changes were manifested in a decrease in the absolute value of the velocity of the downward motion of plasma in the ionosphere over Ukraine with an extremum 42 min after the maximum phase of the solar eclipse in the magnetically conjugate region. This effect is opposite to effect that generally caused by the solar eclipse over Kharkiv. The beginning of the velocity deviation coincided in time with the maximum phase of the solar eclipse, and the end was 1 h 16 min after the instant of greatest eclipse. The velocity deviation amplitude increased with altitude and amounted to 5–45 m/s at altitudes of 200–580 km. The velocity deviation was accompanied by a similar deviation in the temporal variation of the critical frequency with a maximum decrease of 0.7 MHz and in the temporal variation of ionospheric F2 peak height with a maximum increase of 30 km. The response of the ionosphere to the partial solar eclipse on June 10, 2021 with a small obscuration of the Sun (0.112 in diameter, 0.044 in area) at the studied altitudes of 180–500 km was very weak or absent at all, in contrast to results of previous observations of solar eclipses over Kharkiv with greater obscuration of the Sun's disk area (0.31 and more).","PeriodicalId":297673,"journal":{"name":"2022 IEEE 2nd Ukrainian Microwave Week (UkrMW)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133898280","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 : 2022-11-14DOI: 10.1109/UkrMW58013.2022.10037062
Sergii Romanenko, Peter H. Siegel, V. Wallace
Effects of millimetre wave (MMW) radiation in biological objects have been studied for the last several decades. The volume of research on the topic is proportional to the number of new methods and techniques in biological sciences capable of picking up and characterising the MMW-triggered changes in the functionality of the biological object. Yet, regardless of the characterising technique employed, there is always a question of comparison of MMW-related heating and equivalent conductive heating effect in the sample. Moreover, for a number of reasons related to the complexity of fresh tissue's natural organisation and technical imperfections of available today's temperature sensors, the measurement of MMW-associated heating of fresh tissue could be challenging or unreliable. Here, we test the reliability and applicability of two commercially available fluorescent dyes – Rhodamine B and Rhodamine 6G – as a temperature reporter in fresh nervous tissue exposed to intense MMW radiation (100 mW). Results demonstrate the advantages and disadvantages of either dye, their performance, and some practical aspects of usage.
{"title":"Optical Temperature Change Estimate of 60 GHz MMW Radiation Mediated Heating in Nervous Tissue with Rhodamine B and Rhodamine 6G Fluorescent Indicators","authors":"Sergii Romanenko, Peter H. Siegel, V. Wallace","doi":"10.1109/UkrMW58013.2022.10037062","DOIUrl":"https://doi.org/10.1109/UkrMW58013.2022.10037062","url":null,"abstract":"Effects of millimetre wave (MMW) radiation in biological objects have been studied for the last several decades. The volume of research on the topic is proportional to the number of new methods and techniques in biological sciences capable of picking up and characterising the MMW-triggered changes in the functionality of the biological object. Yet, regardless of the characterising technique employed, there is always a question of comparison of MMW-related heating and equivalent conductive heating effect in the sample. Moreover, for a number of reasons related to the complexity of fresh tissue's natural organisation and technical imperfections of available today's temperature sensors, the measurement of MMW-associated heating of fresh tissue could be challenging or unreliable. Here, we test the reliability and applicability of two commercially available fluorescent dyes – Rhodamine B and Rhodamine 6G – as a temperature reporter in fresh nervous tissue exposed to intense MMW radiation (100 mW). Results demonstrate the advantages and disadvantages of either dye, their performance, and some practical aspects of usage.","PeriodicalId":297673,"journal":{"name":"2022 IEEE 2nd Ukrainian Microwave Week (UkrMW)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133969881","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 : 2022-11-14DOI: 10.1109/UkrMW58013.2022.10037019
V. Ilyushin, R. Porohovoi, E. Alekseev, M. Pogrebnyak, H. Müller, F. Lewen, S. Schlemmer
We present the results of our new study of the torsion-rotation spectrum of the acetamide molecule, CH3CONH2. Despite the fact that acetamide was found to be quite abundant in the interstellar medium, its rotation spectrum was studied only up to $J_{max}=20$ so far. The aim of the present study was to extend the quantum number range involved in the analysis (thus improving the quality of predictions for higher excited rotational states) as well as the frequency range coverage. The new measurements were carried out from the millimeter wave range (starting at 34.5 GHz) to the sub-millimeter wave range (up to 645 GHz) using spectrometers in the Kharkiv and Köln laboratories. Our preliminary fits of the $v_{mathrm{t}}=0,1,2$ torsional states of acetamide with $J_{max}=62$ revealed some perturbations, which we attribute to distortions caused by the NH2 wagging state at ∼259 cm−1 (that propagate down to low-lying torsional states via intertorsional interactions). The extension of our assignments to the third excited torsional state of acetamide is a preparatory step toward explicitly accounting for interactions with the NH2 wagging state of acetamide. So far, 421 A-type and 263 E-type rotational transitions up to $J=32$ belonging to the third excited torsional state of acetamide were assigned and added to the analysis. A joint $v_{mathrm{t}}=0,1,2,3$ dataset involving 8240 rotational transitions was fit using the rho axis method giving a weighted root mean square deviation of 2.8 for a Hamiltonian model that includes 114 parameters.
{"title":"The Third Excited Torsional State of Acetamide","authors":"V. Ilyushin, R. Porohovoi, E. Alekseev, M. Pogrebnyak, H. Müller, F. Lewen, S. Schlemmer","doi":"10.1109/UkrMW58013.2022.10037019","DOIUrl":"https://doi.org/10.1109/UkrMW58013.2022.10037019","url":null,"abstract":"We present the results of our new study of the torsion-rotation spectrum of the acetamide molecule, CH3CONH2. Despite the fact that acetamide was found to be quite abundant in the interstellar medium, its rotation spectrum was studied only up to $J_{max}=20$ so far. The aim of the present study was to extend the quantum number range involved in the analysis (thus improving the quality of predictions for higher excited rotational states) as well as the frequency range coverage. The new measurements were carried out from the millimeter wave range (starting at 34.5 GHz) to the sub-millimeter wave range (up to 645 GHz) using spectrometers in the Kharkiv and Köln laboratories. Our preliminary fits of the $v_{mathrm{t}}=0,1,2$ torsional states of acetamide with $J_{max}=62$ revealed some perturbations, which we attribute to distortions caused by the NH2 wagging state at ∼259 cm−1 (that propagate down to low-lying torsional states via intertorsional interactions). The extension of our assignments to the third excited torsional state of acetamide is a preparatory step toward explicitly accounting for interactions with the NH2 wagging state of acetamide. So far, 421 A-type and 263 E-type rotational transitions up to $J=32$ belonging to the third excited torsional state of acetamide were assigned and added to the analysis. A joint $v_{mathrm{t}}=0,1,2,3$ dataset involving 8240 rotational transitions was fit using the rho axis method giving a weighted root mean square deviation of 2.8 for a Hamiltonian model that includes 114 parameters.","PeriodicalId":297673,"journal":{"name":"2022 IEEE 2nd Ukrainian Microwave Week (UkrMW)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134352476","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 : 2022-11-14DOI: 10.1109/UkrMW58013.2022.10037037
F. Bogdanov, L. Svanidze, I. Chochia, R. Jobava
An aim of this paper is to compare thin-wire and surface modeling techniques in MoM solution of radiation and scattering problems on microwave antennas with linear and mixed mesh geometries. This is done for two different feed schemes proposed for surface and wire models: delta-gap and wide-gap. The proposed approach is applied to analyzing canonical antenna geometries with linear elements.
{"title":"Comparison of MoM Solutions to Radiation and Scattering Problems on Wire and Surface Models of Microwave Antennas with Linear Elements","authors":"F. Bogdanov, L. Svanidze, I. Chochia, R. Jobava","doi":"10.1109/UkrMW58013.2022.10037037","DOIUrl":"https://doi.org/10.1109/UkrMW58013.2022.10037037","url":null,"abstract":"An aim of this paper is to compare thin-wire and surface modeling techniques in MoM solution of radiation and scattering problems on microwave antennas with linear and mixed mesh geometries. This is done for two different feed schemes proposed for surface and wire models: delta-gap and wide-gap. The proposed approach is applied to analyzing canonical antenna geometries with linear elements.","PeriodicalId":297673,"journal":{"name":"2022 IEEE 2nd Ukrainian Microwave Week (UkrMW)","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134177597","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 : 2022-11-14DOI: 10.1109/UkrMW58013.2022.10037022
A. G. Koshovy, G. Koshovy, Yuryi F. Logvinov
Two different approaches to generalizations of the classical two-dimensional Sierpinski carpet are presented in correct mathematical sense. The first generalization is based on classical principle of fractal carpet creation. It relates to the change of the fractal creator. In the result a series of two-dimensional self similar fractal square sets can be arisen. The second generalization is reworked on the base of one-dimensional self similar fractal sets with a variable fractal dimension. For all generalized classes of self similar fractal square sets have been presented basic elements of their mathematical analyses.
{"title":"Novel Planar Self-Similar Fractal Sets with a Variable Hausdorf Dimension","authors":"A. G. Koshovy, G. Koshovy, Yuryi F. Logvinov","doi":"10.1109/UkrMW58013.2022.10037022","DOIUrl":"https://doi.org/10.1109/UkrMW58013.2022.10037022","url":null,"abstract":"Two different approaches to generalizations of the classical two-dimensional Sierpinski carpet are presented in correct mathematical sense. The first generalization is based on classical principle of fractal carpet creation. It relates to the change of the fractal creator. In the result a series of two-dimensional self similar fractal square sets can be arisen. The second generalization is reworked on the base of one-dimensional self similar fractal sets with a variable fractal dimension. For all generalized classes of self similar fractal square sets have been presented basic elements of their mathematical analyses.","PeriodicalId":297673,"journal":{"name":"2022 IEEE 2nd Ukrainian Microwave Week (UkrMW)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133016835","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 : 2022-11-14DOI: 10.1109/UkrMW58013.2022.10037009
K. Karaçuha, F. T. Çelik
In this study, a dual-band Quasi-Yagi reconfigurable binomial weighed phased array design is proposed for the unlicensed Wi-Fi and planned 5G band for European Zone. The analytical calculations, numerical simulations, and experimental analysis are done. The antenna array operates at 2.45 and 3.6 GHz. By analog beamforming and the binominal weighting, the antenna has three distinct main lobes for each corresponding phased configuration with reduced sidelobes. The simulations are done on the High-Frequency Structure Simulator (HFSS), and experimental measurements are carried out on the fabricated prototype. The numerical and experimental results are presented.
{"title":"A Dual-Band Quasi-Yagi Reconfigurable Binomial Weighted Phased Antenna Array Design","authors":"K. Karaçuha, F. T. Çelik","doi":"10.1109/UkrMW58013.2022.10037009","DOIUrl":"https://doi.org/10.1109/UkrMW58013.2022.10037009","url":null,"abstract":"In this study, a dual-band Quasi-Yagi reconfigurable binomial weighed phased array design is proposed for the unlicensed Wi-Fi and planned 5G band for European Zone. The analytical calculations, numerical simulations, and experimental analysis are done. The antenna array operates at 2.45 and 3.6 GHz. By analog beamforming and the binominal weighting, the antenna has three distinct main lobes for each corresponding phased configuration with reduced sidelobes. The simulations are done on the High-Frequency Structure Simulator (HFSS), and experimental measurements are carried out on the fabricated prototype. The numerical and experimental results are presented.","PeriodicalId":297673,"journal":{"name":"2022 IEEE 2nd Ukrainian Microwave Week (UkrMW)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132439528","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 : 2022-11-14DOI: 10.1109/UkrMW58013.2022.10037155
T. Tkachova
Some aspects of calculating the characteristics of corrugated cavities for second-harmonic gyrotrons are considered. The influence of spatial Fourier harmonics supported by corrugations on cavity eigenfields is studied. In some specific cases, a comparison of the Bloch harmonics method with the spatial harmonics method for low and high radial modes is presented. It is shown that the method of spatial harmonics, as opposed to Bloch harmonics method, provides accurate data on eigenfield distribution along the cross-section of the corrugated waveguide, with the exception of small areas near the edges of the corrugations.
{"title":"Effect of High Fourier Harmonics on Characteristics of Corrugated Cylindrical Waveguides","authors":"T. Tkachova","doi":"10.1109/UkrMW58013.2022.10037155","DOIUrl":"https://doi.org/10.1109/UkrMW58013.2022.10037155","url":null,"abstract":"Some aspects of calculating the characteristics of corrugated cavities for second-harmonic gyrotrons are considered. The influence of spatial Fourier harmonics supported by corrugations on cavity eigenfields is studied. In some specific cases, a comparison of the Bloch harmonics method with the spatial harmonics method for low and high radial modes is presented. It is shown that the method of spatial harmonics, as opposed to Bloch harmonics method, provides accurate data on eigenfield distribution along the cross-section of the corrugated waveguide, with the exception of small areas near the edges of the corrugations.","PeriodicalId":297673,"journal":{"name":"2022 IEEE 2nd Ukrainian Microwave Week (UkrMW)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124216976","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 : 2022-11-14DOI: 10.1109/UkrMW58013.2022.10037113
M. Dzyubenko, V. Radionov, I. Kuzmichev, V. Maslov
The work substantiates the possibility of increasing the efficiency of lasers by smoothly expanding the radiation beam in the active substance. This makes it possible to use the energy of the active substance as efficiently as possible, avoiding the effect of saturation. A scheme of a laser resonator using the principle of smooth expansion of the radiation beam in the active substance is proposed. Recommendations are developed for the practical application of the proposed scheme and its variations in lasers of various ranges.
{"title":"Smooth Expansion of the Radiation Beam Aperture in a Laser Cavity","authors":"M. Dzyubenko, V. Radionov, I. Kuzmichev, V. Maslov","doi":"10.1109/UkrMW58013.2022.10037113","DOIUrl":"https://doi.org/10.1109/UkrMW58013.2022.10037113","url":null,"abstract":"The work substantiates the possibility of increasing the efficiency of lasers by smoothly expanding the radiation beam in the active substance. This makes it possible to use the energy of the active substance as efficiently as possible, avoiding the effect of saturation. A scheme of a laser resonator using the principle of smooth expansion of the radiation beam in the active substance is proposed. Recommendations are developed for the practical application of the proposed scheme and its variations in lasers of various ranges.","PeriodicalId":297673,"journal":{"name":"2022 IEEE 2nd Ukrainian Microwave Week (UkrMW)","volume":"203 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115898927","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 : 2022-11-14DOI: 10.1109/UkrMW58013.2022.10037097
O. Sukharevsky, I. Ryapolov, V. Vasilets, S. Nechitaylo
Using the methods of mathematical modeling, the values of the radar cross section (RCS) of the Su-27 aircraft model and trihedral corner reflectors in the high-frequency wavelength range were obtained. The scattering characteristics are estimated for trihedral corner reflectors that used as the main scattering element in the proposed model of an airborne radar decoy. The presented results show that in order to obtain sufficiently high values of the RCS of a radar decoy when probing from the front hemisphere, it is necessary to use a “quadruple” corner reflector. If it is necessary to simulate the exact median values of the RCS of a real object in a narrower range of irradiation angles, then it is better to use one tilted corner reflector. It is reasonable to use the obtained results at the developing aerial decoys to simulate the scattering of various complex aerodynamic objects, if corner reflectors are used as a reflective element.
{"title":"The Use of Corner Reflectors to Simulate Tactical Aircraft","authors":"O. Sukharevsky, I. Ryapolov, V. Vasilets, S. Nechitaylo","doi":"10.1109/UkrMW58013.2022.10037097","DOIUrl":"https://doi.org/10.1109/UkrMW58013.2022.10037097","url":null,"abstract":"Using the methods of mathematical modeling, the values of the radar cross section (RCS) of the Su-27 aircraft model and trihedral corner reflectors in the high-frequency wavelength range were obtained. The scattering characteristics are estimated for trihedral corner reflectors that used as the main scattering element in the proposed model of an airborne radar decoy. The presented results show that in order to obtain sufficiently high values of the RCS of a radar decoy when probing from the front hemisphere, it is necessary to use a “quadruple” corner reflector. If it is necessary to simulate the exact median values of the RCS of a real object in a narrower range of irradiation angles, then it is better to use one tilted corner reflector. It is reasonable to use the obtained results at the developing aerial decoys to simulate the scattering of various complex aerodynamic objects, if corner reflectors are used as a reflective element.","PeriodicalId":297673,"journal":{"name":"2022 IEEE 2nd Ukrainian Microwave Week (UkrMW)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116519541","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 : 2022-11-14DOI: 10.1109/UkrMW58013.2022.10037139
S. Litvintsev, S. Rozenko, L. Pinchuk
The problem of synthesis of stepped impedance resonators (SIRs) and resonators with stubs, which contain transmission line segments of the same length and suppress harmonics of the main signal, is solved. It is established that SIR with $N$ composite segments allows us to continuously suppress $(boldsymbol{N}-1)$ harmonics $2boldsymbol{f}0, 3boldsymbol{f}_{0}, ldots, boldsymbol{Nf}_{0}$ of the main signal with a frequency $boldsymbol{f}_{0}$. To do this, it is necessary to coincide the anti-resonant frequencies of SIR with the specified harmonic frequencies. Simple expressions are established to determine the characteristic impedances of SIRs with four composed segments. It is shown that the transition from SIR to stub resonators improves their practical feasibility. Using the circuit simulator, the reliability of the presented solution was confirmed.
{"title":"Synthesis of Transmission Line Resonators for Harmonic Suppression","authors":"S. Litvintsev, S. Rozenko, L. Pinchuk","doi":"10.1109/UkrMW58013.2022.10037139","DOIUrl":"https://doi.org/10.1109/UkrMW58013.2022.10037139","url":null,"abstract":"The problem of synthesis of stepped impedance resonators (SIRs) and resonators with stubs, which contain transmission line segments of the same length and suppress harmonics of the main signal, is solved. It is established that SIR with $N$ composite segments allows us to continuously suppress $(boldsymbol{N}-1)$ harmonics $2boldsymbol{f}0, 3boldsymbol{f}_{0}, ldots, boldsymbol{Nf}_{0}$ of the main signal with a frequency $boldsymbol{f}_{0}$. To do this, it is necessary to coincide the anti-resonant frequencies of SIR with the specified harmonic frequencies. Simple expressions are established to determine the characteristic impedances of SIRs with four composed segments. It is shown that the transition from SIR to stub resonators improves their practical feasibility. Using the circuit simulator, the reliability of the presented solution was confirmed.","PeriodicalId":297673,"journal":{"name":"2022 IEEE 2nd Ukrainian Microwave Week (UkrMW)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116522841","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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