K. Muzalevskiy, Z. Ruzicka, M. G. Zahvatov, R. Muskett, S. Fomin
{"title":"Soil moisture retrieval in the North Slope of Alaska from GCOM-W1/AMSR2 and Meteor-M No. 2/MTVZA-GYa radiometers data","authors":"K. Muzalevskiy, Z. Ruzicka, M. G. Zahvatov, R. Muskett, S. Fomin","doi":"10.1109/PIERS.2017.8261974","DOIUrl":"https://doi.org/10.1109/PIERS.2017.8261974","url":null,"abstract":"In this paper, for the Arctic tundra region in the North Slope of Alaska, calibration of microwave emission model on the basis of AMSR2 and MTVZA-GYa radiometric data of the GCOM-W1 and Meteor-M No. 2 satellites, respectively were carried out. The GCOM-W1 and Meteor-M No. 2 brightness temperature data covered the period from January 1, 2012 to December 31, 2016 and January 1 to December 31, 2015, respectively. The peculiarity of the proposed calibration lies in the use of biomass vegetation and soil temperature estimations from the AMSR2 and the MTVZA-GYa radiometers observations with using empirical relationships. To estimate the vegetation biomass and soil temperature were proposed calibration curves linking brightness temperatures, measured by the radiometers, with the aboveground phytomass which was estimated from MODIS NDVI data, and with soil temperature which was measured by weather stations in-situ. As a result was shown that the proposed calibration allows to retrieve soil moisture at the test sites in North Slope of Alaska with determination coefficient of 0.46–0.52 and RMSE of 0.06–0.1 cm3/cm3. The study shows the potential possibility of carrying out the calibration of emission model, which improves the accuracy of the measurement of soil moisture in the Arctic region compared to existing satellite information products. This study demonstrates the possibility of using radiometer MTVZA-GYa on aboard of the Russian satellite Meteor-M No. 2 to measure soil moisture in the Arctic region. Found empirical relationships between brightness temperatures and surface soil temperature and aboveground phytomass at the test sites allows to predict these values from GCOM-W1 and Meteor-M No. 2 observations in the range of RMSE 53–54g/m2 and 1–1.5K, respectively.","PeriodicalId":387984,"journal":{"name":"2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130724746","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}
{"title":"Synchronization of hidden chaotic attractors on the example of radiophysical oscillators","authors":"N. Kuznetsov, G. Leonov, N. Stankevich","doi":"10.1109/PIERS.2017.8262292","DOIUrl":"https://doi.org/10.1109/PIERS.2017.8262292","url":null,"abstract":"In the present paper we consider the problem of synchronization of hidden and self-excited attractors in the context of application to a system of secure communication. The system of two coupled Chua models was studied. Complete synchronization was observed as for self-excited, as hidden attractors. Beside it for hidden attractors some special type of dynamic was revealed.","PeriodicalId":387984,"journal":{"name":"2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122120394","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}
{"title":"Inverse coefficient problems for static Maxwell equations","authors":"R. Brizitskii, Z. Saritskaya","doi":"10.1109/PIERS.2017.8261957","DOIUrl":"https://doi.org/10.1109/PIERS.2017.8261957","url":null,"abstract":"Inverse coefficient problem for static Maxwell equations is considered. The function of magnetic permeability is used in the capacity of the unknown coefficients, which are recovered with the help of the additional information about the magnetic field. The inverse coefficient problem is reduced to the multiplicative control one. The stability of it's solutions is studied.","PeriodicalId":387984,"journal":{"name":"2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129178735","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}
V. Kotlyar, A. Nalimov, S. Stafeev, L. O’Faolain, E. Kozlova
{"title":"A metalens for subwavelength focus of light","authors":"V. Kotlyar, A. Nalimov, S. Stafeev, L. O’Faolain, E. Kozlova","doi":"10.1109/PIERS.2017.8261716","DOIUrl":"https://doi.org/10.1109/PIERS.2017.8261716","url":null,"abstract":"We designed, fabricated, and characterized a thin metalens in an amorphous silicon film of diameter 30 μm, focal length equal to the incident wavelength 633 nm. The lens is capable of simultaneously manipulating the state of polarization and phase of incident light. The lens converts a linearly polarized beam into radially polarized light, producing a subwavelength focus. When illuminated with a linearly polarized Gaussian beam, the lens produces a focal spot whose size at full-width half-maximum intensity is 0.49λ and 0.55λ (λ is incident wavelength). The experimental results are in good agreement with the numerical simulation, with the simulated focal spot measuring 0.46λ and 0.52λ. This focal spot is less than all other focal spots obtained using metalenses.","PeriodicalId":387984,"journal":{"name":"2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133250865","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}
{"title":"Asymmetric coplanar waveguide fed monopole antenna with perturbed ground plane","authors":"L. Meenu, S. Aiswarya, K. Sreedevi","doi":"10.1109/PIERS.2017.8261735","DOIUrl":"https://doi.org/10.1109/PIERS.2017.8261735","url":null,"abstract":"Present work proposes an Asymmetric Coplanar (ACPW) fed antenna providing wide band and omnidirectional radiation. Gain enhancement is achieved by the introducing perturbations on the shorted ground plane. The proposed antenna offers a 2 :1 VSWR bandwidth of 741 MHz at 5.2 GHz with the enhanced gain of 6.4 dBi. The parametric analysis and optimization of the antenna is done by using ANSYS HFSS. Optimized prototype is analyzed experimentally using Keysight E5080A Vector Network Analyzer. The proposed antenna will have wide range of applications in different wireless communication systems.","PeriodicalId":387984,"journal":{"name":"2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122991864","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}
G. Jandieri, Z. Diasamidze, M. Diasamidze, I. Takidze
{"title":"Scintillation studies of scattered radio waves in the ionosphere","authors":"G. Jandieri, Z. Diasamidze, M. Diasamidze, I. Takidze","doi":"10.1109/PIERS.2017.8261701","DOIUrl":"https://doi.org/10.1109/PIERS.2017.8261701","url":null,"abstract":"Second order statistical moments of scattered radio wave in the turbulent collision magnetized plasma are investigated for the anisotropic Gaussian correlation function of electron density fluctuations using the modify smooth perturbation method taking into account polarization coefficients of the ordinary and extraordinary HF wave modes and the diffraction effects. The behavior of the phase structure function of the ordinary and extraordinary waves is different in the principle (location of an external magnetic field) plane while the same in the perpendicular plane. Anisotropy, diffraction effects and collision between plasma particals have substantial influence of the phase structure function on the extraordinary wave in the principle plane. Varing anisotropy factor the angle of arrival in the principle plane less than in the perpendicular plane. Investigation of the scintillation effects are carried out for small-scale plasma irregularities. It was shown that increasing frequency of an incident wave from 3 MHz up to 40 MHz scintillation level decreases. Splashes caused by the strong phase fluctuations are revealed in the normalized scintillation level at 40 MHz frequency. Comparison of the scintillation level at the frequencies 3 MHz and 40 MHz show that the amplitude of scintillation decreases with increasing frequency of an incident wave. Scintillation level of scattered radio wave also depends on the spectrum of electron density irregularities.","PeriodicalId":387984,"journal":{"name":"2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114470901","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}
{"title":"Research on electromagnetic scattering and plasma stealth design of S-shaped inlet","authors":"Zhijie Song, Haojun Xu, Xiaolong Wei, Zeng-gui Chen","doi":"10.1109/PIERS.2017.8262156","DOIUrl":"https://doi.org/10.1109/PIERS.2017.8262156","url":null,"abstract":"Inlet duct is a strong scattering source of radar waves due to its cavity structure which can make multiple reflections of electromagnetic wave through the cavity walls. Moreover, the complicated cavity structure always makes it difficult to obtain its scattering characteristic. S-shaped inlet is a frequently-used design to reduce return radar wave, but the hiding effect is limited. Relying on its great advantages over traditional stealth technologies, plasma stealth is an emerging technology which attracts the attention of many researchers. Considering the particular structure of S-shaped inlet, a kind of closed plasma was designed to be conformal to the inlet to improve the stealth performance of S-shaped inlet. Firstly, the electromagnetic scattering characteristic of S-shaped airplane inlet was analyzed by using shooting and bouncing ray (SBR) method. Mathematical principle of SBR method was described through three procedures: geometric optical ray tracing, field intensity tracking and physical optics aperture integral. To improve SBR method, a Keller cone model was presented to obtain the contribution of edge diffraction. Then the radar cross section (RCS)of a cylindrical inlet model was calculated using SBR method and the result tallies well with that in reference, which proves the effectiveness of SBR method and the correction model for calculating scattering characteristic of inlet. Then on this basis, the RCS of a S-shaped inlet was calculated by SBR method. At last, to verify the stealth effect of plasma stealth, the RCS of the inlet with plasma was assessed.","PeriodicalId":387984,"journal":{"name":"2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121850004","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}
{"title":"Heating of metal powders in the external high-frequency field","authors":"A. V. Vodopyanov, I. Dubinov, V. Semenov","doi":"10.1109/PIERS.2017.8261709","DOIUrl":"https://doi.org/10.1109/PIERS.2017.8261709","url":null,"abstract":"This article suggests a method of approximate calculation of microwave heating of the micron-sized metal particles, based on the two limiting cases when the skin depth is much larger than the particle size and when the skin depth is much smaller than the particle size. The calculation was done for spheroidal and ellipsoidal particle shapes. To investigate the spheroidal particles the comparison of the proposed method with the exact solution and with the results of numerical calculation will be completed. The examination of the ellipsoidal particles requires the comparison of the proposed method and the results of the numerical calculation.","PeriodicalId":387984,"journal":{"name":"2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124307295","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}
{"title":"Circular microstrip patch assisted planar crossover for GPS application","authors":"V. Jayakrishnan, K. Sreedevi","doi":"10.1109/PIERS.2017.8262269","DOIUrl":"https://doi.org/10.1109/PIERS.2017.8262269","url":null,"abstract":"For efficient monitoring and tracking of vehicles, aircraft or ships GPS (Global Positioning System) satellite based navigation system plays an inevitable role. For long range GPS communication and tracking, high gain antennas usually array antennas are preferred. Realized using butler matrix phased array antennas are potential candidate for providing long range communication providing directional beam. Butler matrix provides equal amplitude to the antennas by means of hybrid coupler, necessary beam orientation using phase shifter and ensures signal purity when transmission lines overlap by crossover circuit. Thus crossover will mitigate the GPS tracking of signal when transmission lines overlap each other maintaining high SNR. This paper focuses on the investigations of an L band planar crossover realised using microstrip technology. The crossover characteristics like transmission and isolation are analysed in detail. For enhancing the isolation between the decoupled ports, parent crossover is further modified maintaining good transmission between coupled ports. The analysis is done using ANSYS HFSS and the optimised crossover is fabricated on FR4 substrate and measurements are taken by using Keysight ENA 5080A Vector Network Analyser. The simulated and measured results are in good agreement with each other. This proposed crossover is the possible solution for long range wireless communication and GPS Applications.","PeriodicalId":387984,"journal":{"name":"2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121347627","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}
O. Nanii, A. Kuzmenkov, S. Lukinykh, A. I. Fedoseev, A. Smirnov, V. N. Treshikov
{"title":"Temporal stability of a multi-wavelength fiber laser","authors":"O. Nanii, A. Kuzmenkov, S. Lukinykh, A. I. Fedoseev, A. Smirnov, V. N. Treshikov","doi":"10.1109/PIERS.2017.8261773","DOIUrl":"https://doi.org/10.1109/PIERS.2017.8261773","url":null,"abstract":"The lasers able to operate at several wavelengths are highly demanded because of the wide range of their applications [1]. Multi-wavelength light sources with tunable wavelength of 1530–1560 nm are also applied for the DWDM fiber optic networks testing [2]. Erbium doped fiber laser (EDFL) [3] is promising light source for such purpose.","PeriodicalId":387984,"journal":{"name":"2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115379118","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}