{"title":"Recent advances in the spectral theory of open structures: Existence and distribution of the spectra of running waves for a class of open waveguides","authors":"Y. Shestopalov","doi":"10.1109/ICEAA.2016.7731402","DOIUrl":"https://doi.org/10.1109/ICEAA.2016.7731402","url":null,"abstract":"We give a general description of mathematical background and a resume of the results about existence and distribution of the spectra of running waves in open waveguides, including metal-dielectric waveguides with arbitrary cylindrical in-homogeneities, layered concentric dielectric waveguides of circular cross section and Goubau lines with layered dielectric covers. The newly obtained results are reported concerning singularities (resonant states) of the transmission coefficient in the problems of the wave scattering by parallel-plate dielectric slabs in a waveguide and free space. The findings are based on recent advances in the spectral theory of open structures.","PeriodicalId":434972,"journal":{"name":"2016 International Conference on Electromagnetics in Advanced Applications (ICEAA)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122050784","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":"Computational research on calibration target for full-polarimetric scattering measurement","authors":"Y. Bai, H. Yin, C. Dong","doi":"10.1109/ICEAA.2016.7731443","DOIUrl":"https://doi.org/10.1109/ICEAA.2016.7731443","url":null,"abstract":"Co-polarized and cross-polarized radar cross sections(RCS) characterize the scattering of complex target completely. Calibration target is required to measure polarimetric scattering matrix(PSM) accurately. The commonly used calibration targets, such as dihedral, cannot apply to bistatic polarimetric RCS calibration because of its narrow cross-polarized returns. This practice devises a new calibration target for PSM measurement. It is a special screw with ten grooves which circumgyrating extend over a flat cylinder. We study the monostatic and bistatic full-polarization RCS by numerical calculation, and confirm that this calibration target has similar co-polarized and cross-polarized responses over a wide band both in monostatic and bistatic. The larruping scattering characteristic makes this target be suitable for bistatic full-polarimetric scattering measurement calibration.","PeriodicalId":434972,"journal":{"name":"2016 International Conference on Electromagnetics in Advanced Applications (ICEAA)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124968806","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":"Simulation-driven particle swarm optimization of spatial phase shifters","authors":"A. Lalbakhsh, M. U. Afzal, K. Esselle","doi":"10.1109/ICEAA.2016.7731418","DOIUrl":"https://doi.org/10.1109/ICEAA.2016.7731418","url":null,"abstract":"This paper presents a technique to design electromagnetic devices by a combination of evolutionary algorithm and electromagnetic (EM) simulation. This technique, named simulation-driven particle swarm optimization (SDPSO), exploits particle swarm optimization (PSO) to design a microwave component matched to user's requirements. To justify the need for such SDPSO, a performance comparison is made between the presented method and built-in PSO in CST Microwave Studio by designing three spatial phase shifters (45°, 90° and 135°) at 9 GHz. Optimization results show that the SDPSO outperforms the available built-in PSO.","PeriodicalId":434972,"journal":{"name":"2016 International Conference on Electromagnetics in Advanced Applications (ICEAA)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129779143","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":"On the effects of mutual coupling in the active reflection coefficient of wide-field scanning electrically large random phased arrays","authors":"E. de Lera Acedo, M. Arts, C. Craeye, H. B. Van","doi":"10.1109/ICEAA.2016.7731490","DOIUrl":"https://doi.org/10.1109/ICEAA.2016.7731490","url":null,"abstract":"Wide-angle scanning phased arrays suffer from bandwidth limitations due to the effects of mutual coupling. If the array is regular, blind scan anomalies can be found in the active reflection coefficient in band for even 2:1 bandwidth ratios. If the array has a random distribution of elements however, we can see how the effects of mutual coupling randomize out in the active reflection coefficient, effectively increasing the frequency and scan range bandwidth.","PeriodicalId":434972,"journal":{"name":"2016 International Conference on Electromagnetics in Advanced Applications (ICEAA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128817549","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}
Le Yang, M. Moghaddam, Qinhuo Liu, Richard H. Chen
{"title":"Exploring the effect of forest spatial heterogeneity using coherent three-dimensional radar backscattering model","authors":"Le Yang, M. Moghaddam, Qinhuo Liu, Richard H. Chen","doi":"10.1109/ICEAA.2016.7731522","DOIUrl":"https://doi.org/10.1109/ICEAA.2016.7731522","url":null,"abstract":"Modeling natural forest is challenging since the vertical and horizontal structural heterogeneity of variations of tree height, scatter shape, and pattern resulted from different tree species, growth stage, and environmental variables. The heterogeneous effect of mix-scene is not well understood quantitative so far, which might cause substantial uncertainty in the soil moisture and biomass estimations. We investigated effects of trunk tilt, trunk tapering, existence of understory and mix-scenes of forest combined with grass by using a coherence 3D vegetation radar model, which is firstly parametrized and validated using the ground measurements and airborne P band SAR data at pine forest of Metolius, Oregon, USA, 2013-2014. The airborne SAR data and simulated data are in good agreement with mean difference less than 1dB and correlation coefficient above 0.96. The tilt angle from 0 to 10 degree can reduce the backscatter coefficient of 1.55dB and 1.03dB for HH and VV, respectively. Tapering of trunk causes the decrease of 2.54dB and 6.35dB for HH and VV polarizations. Simulations of several mix-scenes of the same tree and ground parameters but difference tree clumping patterns indicate the largest difference can up to 3dB of extreme tree clumping patterns.","PeriodicalId":434972,"journal":{"name":"2016 International Conference on Electromagnetics in Advanced Applications (ICEAA)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130200991","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}
D. M. Solís, J. M. Taboada, F. Obelleiro, L. Landesa, J. Rodríguez
{"title":"Impact of the evaluation precision of the reaction integrals of the method of moments on the solution of plasmonic problems near the quasi-static regime","authors":"D. M. Solís, J. M. Taboada, F. Obelleiro, L. Landesa, J. Rodríguez","doi":"10.1109/ICEAA.2016.7731552","DOIUrl":"https://doi.org/10.1109/ICEAA.2016.7731552","url":null,"abstract":"The present work digs into some of the accuracy issues the authors have found when dealing with plasmonic problems in the vicinity of quasi-statics, where the dimension of the particles inevitably leads to extremely small mesh sizes to preserve the geometrical features. Obviously, these problems can always be traced back to a certain lack of precision in the evaluation of the reaction integrals, but some light is herein shed as to which term in the impedance matrix each inconsistency can be related to, in addition to some physical insight.","PeriodicalId":434972,"journal":{"name":"2016 International Conference on Electromagnetics in Advanced Applications (ICEAA)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127590207","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":"Phased array far field in the time domain","authors":"R. Haupt, P. Nayeri","doi":"10.1109/ICEAA.2016.7731444","DOIUrl":"https://doi.org/10.1109/ICEAA.2016.7731444","url":null,"abstract":"The far field definition used by the IEEE comes from a narrow band formulation (time-harmonic fields). This paper looks at the far field definition from a broadband signal perspective. A time domain definition of far field in terms of the pulse dispersion for large, wideband phased arrays is presented. It is shown that far field in the time domain depends upon the instantaneous bandwidth of the signal.","PeriodicalId":434972,"journal":{"name":"2016 International Conference on Electromagnetics in Advanced Applications (ICEAA)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124673972","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}
S. Zhekov, A. Tatomirescu, Ondřej Franek, G. F. Pedersen
{"title":"Study of the interaction user head-ultrawideband MIMO antenna array for mobile terminals","authors":"S. Zhekov, A. Tatomirescu, Ondřej Franek, G. F. Pedersen","doi":"10.1109/ICEAA.2016.7731557","DOIUrl":"https://doi.org/10.1109/ICEAA.2016.7731557","url":null,"abstract":"This paper presents a numerical study of the interaction between the user head and MIMO antenna array for mobile phones. The antenna array is composed of two identical antennas and covers the frequency ranges 698-990 MHz and 1710-5530 MHz with a good radiation efficiency in free space. The two aspects of the interaction are considered: 1) the influence of the user head on the antenna operation, and 2) the exposure of the human head tissue to antenna electromagnetic radiation. The first aspect is related to the degradation of the antenna performance in a proximity to the user which is evaluated by the reduction of the antenna radiation efficiency. The second aspect refers to the antenna operation effect on the human and the exposure of the user head is studied by Specific Absorption Ratio (SAR).","PeriodicalId":434972,"journal":{"name":"2016 International Conference on Electromagnetics in Advanced Applications (ICEAA)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121151421","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}
Enrico Fraccaroli, M. Lora, F. Fummi, P. Montuschi
{"title":"A fast simulation environment for smart systems validation in presence of electromagnetic interferences","authors":"Enrico Fraccaroli, M. Lora, F. Fummi, P. Montuschi","doi":"10.1109/ICEAA.2016.7731505","DOIUrl":"https://doi.org/10.1109/ICEAA.2016.7731505","url":null,"abstract":"The paper presents a methodology for the automatic abstraction of analog magnetic components to achieve efficient simulation of complex smart system virtual platform. We aim at facilitating the validation process by allowing the simulation of both functional and extra-functional behaviors of the system with an unified simulation environment. The approach employs a process of simplification which removes unnecessary details of the analog model, enabling a much faster simulation.","PeriodicalId":434972,"journal":{"name":"2016 International Conference on Electromagnetics in Advanced Applications (ICEAA)","volume":"116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124096622","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}
Naif Rabeah, Sundar Aditya, Faisal M. Alawwad, A. Molisch, H. Behairy
{"title":"A measurement-based blocking distribution for improving localization in warehouse environments","authors":"Naif Rabeah, Sundar Aditya, Faisal M. Alawwad, A. Molisch, H. Behairy","doi":"10.1109/ICEAA.2016.7731546","DOIUrl":"https://doi.org/10.1109/ICEAA.2016.7731546","url":null,"abstract":"In a warehouse environment, blocked line-of-sight between targets and anchors, due to storage racks, is an impediment to localization. For ultrawideband signals, the stochastic nature of the blocking phenomenon - due to its material penetrating capabilities - can be characterized by a location-specific blocking distribution. Once such a distribution is available, the localization of a potentially unknown number of targets can be cast as a Bayesian estimation problem, where the blocking distribution plays the role of a prior. This paper presents the results of a ultrawideband measurement campaign conducted to obtain the blocking distribution in a warehouse environment.","PeriodicalId":434972,"journal":{"name":"2016 International Conference on Electromagnetics in Advanced Applications (ICEAA)","volume":"177 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126744395","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}