2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)最新文献

{"title":"300 Mbps photonic QPSK modulator for space applications","authors":"J. Panasiewicz, L. A. D. Britto, G. M. Pacheco","doi":"10.1109/PIERS.2017.8261998","DOIUrl":"https://doi.org/10.1109/PIERS.2017.8261998","url":null,"abstract":"This paper addresses the evolution of the photonic QPSK modulator setup previously reported. This second generation setup used two laser sources and the bias tee was replaced by a power combiner. As a result, the second setup enables one to reach higher data rates with better stability and modulated signal quality. The improved setup initially achieved a data rate of 50 Mbps in a QPSK scheme with an EVM of 8%. Using a root-raised-cosine filter, it was possible to reduce the EVM to 4.5%. After the EVM analysis, the modulated signal was demodulated through an actual satellite receiver. Using the demodulator, it was possible to measure the BER and verify if the incoming signal was modulated in the correct order. The QPSK modulator achieved finally a bit rate of 300 Mbps. The degradation analysis of the modulator with QPSK modulation and bit rate of 100 Mbps was 0.06 dB. In this case the values of Eb/N0 and BER were 11.36 dB and 10∼7. The obtained results are a consequence of the photonic technology bandwidth and the improvement made in the input and bias circuit.","PeriodicalId":387984,"journal":{"name":"2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126815929","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":"Dual-band dual-polarized hybrid cylindrical dielectric resonator antenna for wireless applications","authors":"Anand Sharma, Gourab Das, R. Gangwar","doi":"10.1109/PIERS.2017.8262114","DOIUrl":"https://doi.org/10.1109/PIERS.2017.8262114","url":null,"abstract":"This article presents design and analysis of dual-band dual-polarized hybrid dielectric resonator antenna for WLAN/WiMAX applications. Four important features of proposed article are: (i) Hexagon shaped aperture is act as radiator and feeding structure for cylindrical DRA (CDRA); (ii) dual hybrid radiating modes (HEM11δ and HEM12δ mode) are generated in CDRA with broadsided radiation characteristics; (iii) circular polarization (CP) characteristic in upper frequency band is formed by stuffing quarter annular line with straight microstrip line; (iv) sense of polarization of CP wave can be controlled by changing the position of quarter annular line. The parametric analysis of proposed antenna design has been carried out on HFSS EM simulator. The optimized results are verified by CST-MWS. The proposed antenna design is operating over two frequency ranges, i.e., 2.58–2.96 GHz and 4.83–5.93 GHz with the fractional bandwidth 13.71% and 20.44% respectively. 3-dB axial ratio bandwidth is approximately 8.09 % (4.83–5.35 GHz) in upper frequency band.","PeriodicalId":387984,"journal":{"name":"2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115519506","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":"Sources of longitudinal variations in the high-middle latitude ionosphere over Eurasia","authors":"B. Shpynev, M. Chernigovskaya","doi":"10.1109/PIERS.2017.8262077","DOIUrl":"https://doi.org/10.1109/PIERS.2017.8262077","url":null,"abstract":"In the present study we analyze the relation of longitudinal effects in the mid-latitude and subauroral ionosphere with neutral atmosphere dynamics during quiet and disturbed geomagnetic conditions. Particularly, we analyze the large scale ionospheric effects that are initiated by large scale processes both in strato-mesosphere and in geomagnetic field. Comparing to our previous studies, we focus on processes in winter strato-mesosphere in quiet geomagnetic conditions and on lower thermosphere disturbances generated during the disturbed magnetosphere conditions. The disturbances under consideration are caused by different sources. The first source is active during quiet geomagnetic conditions in winter Northern Hemisphere, it is generated by a jet stream in strato-mesosphere. The difference between critical frequencies for the ionosondes spaced longitudinally by only 15–20 degrees could reach about 1.5–2 MHz, depending on the observation point location as related to the jet stream which usually has the specific zones of upward and downward fluxes. Second process that highly depends on neutral gas dynamics was previously analyzed on the basis of the ionosphere response to the March 2015 severe geomagnetic storm. It was shown that some unexpected longitudinal dynamics of the middle latitude ionosphere arose, while the storm-associated [O]/[N2] disturbances have been moving westward during a few days. The third source of longitudinal irregularities of the ionosphere is determined by the characteristics of geomagnetic field variations. It was shown that during the storm, the three active zones with specific longitudinal structure were formed. One is shifted from the geographic pole toward the magnetic pole at ∼ 270° longitude. Two other zones were formed symmetrically opposite to the geomagnetic pole at ∼ 40°E and ∼ 130°E longitudes, and major electron density depletions were observed in the high-middle latitude ionosphere at these longitudes. On the contrary, the ∼ 80–110°E longitudinal sector showed electron density maximum in quiet conditions and fast ionosphere restoration after the storm decay. It is interesting, that the ionospheric disturbances in quiet and disturbed periods tend to be localized in the same longitudinal sectors, so that we can suggest some common mechanism responsible for the global ionosphere dynamics. Specific longitudinal structure of the middle latitude and subauroral ionosphere is analyzed. The stratosphere dynamics, geomagnetic disturbances and background geomagnetic field structure are considered as main drivers of the observed ionosphere variations.","PeriodicalId":387984,"journal":{"name":"2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122702029","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":"Numerical analysis of nanoscale resonators using material parameters at THz frequencies","authors":"P. Drexler, D. Nespor, R. Kadlec, E. Gescheidtová","doi":"10.1109/PIERS.2017.8262443","DOIUrl":"https://doi.org/10.1109/PIERS.2017.8262443","url":null,"abstract":"The article presents results of numerical modelling of planar resonators arrays designed for THz frequencies. The increase in the resonant frequency of each array's element is achieved by down-scaling its dimensions. In order to achieve response in the THz/IR region of the electromagnetic response, the partial resonator components of the array collapsed in to the dot-like structures. Two types of dot-like structures were examined — a square and circle shape. Mainly the circle shape resonators seem to be promising for simplified fabrication by micro-structuring technology. Changing the uniformity of array spacing led to rise of new modes in the spectral response. Such effect could be potentially used for spectral data encoding.","PeriodicalId":387984,"journal":{"name":"2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122481652","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":"Optical bound state in the continuum in the one-dimensional photonic structures: Transition into a resonant state","authors":"Z. Sadrieva, I. Sinev, A. Samusev, I. Iorsh, A. Bogdanov, K. Koshelev, O. Takayama, R. Malureanu, A. Lavrinenko","doi":"10.1109/PIERS.2017.8262233","DOIUrl":"https://doi.org/10.1109/PIERS.2017.8262233","url":null,"abstract":"Optical bound states in the continuum (BIC) are localized states with energy lying above the light line and having infinite lifetime. Any losses taking place in real systems result in transformation of the bound states into resonant states with finite lifetime. In this work, we analyze properties of BIC in CMOS-compatible one-dimensional photonic structure based on silicon-on-insulator wafer at telecommunication wavelengths, where the absorption of silicon is negligible. We reveal that a high-index substrate could destroy both off-Γ BIC and in-plane symmetry protected at-Γ BIC turning them into resonant states due to leakage into the diffraction channels opening in the substrate. We show how two concurrent loss mechanisms — scattering due to surface roughness and leakage into substrate — contribute to the suppression of the resonance lifetime and specify the condition when one of the mechanisms becomes dominant. The obtained results provide useful guidelines for practical implementations of structures supporting optical bound states in the continuum.","PeriodicalId":387984,"journal":{"name":"2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122654245","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":"Quantum state model of non-radiative decay for description of superradiance","authors":"I. Protsenko, A. Uskov","doi":"10.1109/PIERS.2017.8262242","DOIUrl":"https://doi.org/10.1109/PIERS.2017.8262242","url":null,"abstract":"Description of superradiance (SR) of few quantum emitters with non-radiative decay is carried out in the frame of Schrödinger picture taking into account non-equilibrium bath states. Quantum efficiencies (QE) of SR of two and three emitters are calculated and compared with QE of spontaneous emission of two and three independent emitters. Maximum increase of QE is 9% for two emitters and 16% for three emitters, it is reached at certain relationships between non-radiative and radiative decay rates and at non-equilibrium in baths of non-radiative decay.","PeriodicalId":387984,"journal":{"name":"2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114136276","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":"Possibility of isotropic metafilm representation by an equivalent homogeneous layer","authors":"Z. O. Dombrovskaya, A. Zhuravlev","doi":"10.1109/PIERS.2017.8262338","DOIUrl":"https://doi.org/10.1109/PIERS.2017.8262338","url":null,"abstract":"New algorithm demonstrating that it is possible to replace an isotropic metafilm by an equivalent thin film with frequency-dependent thickness is proposed.","PeriodicalId":387984,"journal":{"name":"2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114480976","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":"A novel compact Tri-band antenna for WLAN application","authors":"Hengxu Wang, Jiahe Mei, T. Jiang","doi":"10.1109/PIERS.2017.8261824","DOIUrl":"https://doi.org/10.1109/PIERS.2017.8261824","url":null,"abstract":"In this research article, a novel compact tri-band antenna for WLAN communication system is presented. The structure of the antenna consists of two L shaped patches. Under the condition of ensuring antenna size, by modifying the length of the upper trapezoidal top and bottom edge and the groove in the center of the trapezoid depth width and the groove of the relative position to obtain three center frequency, form three Working frequency bands. The simulation results show that these working frequency bands of the −10 dB antenna were 2.4 GHz, 5.2 GHz and 5.8GHz. From the perspective of electromagnetic compatibility, the antenna has excellent out-band characteristics with other quoted reference antennas. The proposed antenna is steeper than other antennas at 5 GHz frequency. Thus the proposed antenna is the excellent.","PeriodicalId":387984,"journal":{"name":"2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129495313","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":"Tunable impedance microwave matching of laser diodes","authors":"R. Platonov, A. Altynnikov, A. Mikhailov, A. Yastrebov, N. Mukhin, S. Hirsch, A. Kozyrev","doi":"10.1109/PIERS.2017.8261920","DOIUrl":"https://doi.org/10.1109/PIERS.2017.8261920","url":null,"abstract":"Three types of an impedance matching circuits (MC) namely resistive, reactive and tunable reactive MC (TRMC) are analyzed to estimate the advisability of their application for directly modulated lasers (DML) in microwave (MW) photonic systems. Return loss (|S11|) and insertion loss (|S21|) frequency dependencies for MCs loaded by a DML are calculated for X-band broadly used in radar systems. Analysis of the TRMC characteristics is carried out taking into account the microwave parameters of tunable elements of different classes (semiconductor, ferroelectric and micro-electromechanical (MEM) elements). It is shown that in the instantaneous frequency band (Δfi ∼ 1 GHz) the TRMC in comparison with the resistive MC provides more than 10 dB increase of the MW power delivered to an active region of the DML. Proposed TRMC demonstrate ∼ 2.5 times increase of the total frequency operating bandwidth (Δfop ∼ 5 GHz) due to a frequency scan possibility for the instantaneous band in contrast with the non-tunable reactive MC.","PeriodicalId":387984,"journal":{"name":"2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129760064","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":"An improved track segment association algorithm using MM-GNN method","authors":"Shengsen Pan, Qinglong Bao, Weibing Hou, Zengping Che","doi":"10.1109/PIERS.2017.8261827","DOIUrl":"https://doi.org/10.1109/PIERS.2017.8261827","url":null,"abstract":"Track breakages are common due to target maneuver, Doppler radar blind spot, long sampling interval and low detection probabilities. Note that the existed classic association algorithms have low correlation accuracy and poor practicability in dense environment or in track crossing situation. In this paper, we aim to present a new track segment association (TSA) technique to improve track continuity. An improved Multiple Model (MM) method with Global Nearest Neighbor (GNN) algorithm for track segment association is put forward, that is MM-GNN method. Simulation experiments show that proposed algorithm enhances the track maintenance performance and the track life of tracking result while ensuring the accuracy of tracking. Verified by real measured data, it confirms that the algorithm is suitable for multiple target tracking in practical radar system with the improvement of track continuity.","PeriodicalId":387984,"journal":{"name":"2017 Progress In Electromagnetics Research Symposium - Spring (PIERS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129938907","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}