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2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting最新文献

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DGTD method for SAR evaluation in a human head model exposed to a wideband antenna 宽带天线下人体头部模型SAR评估的DGTD方法
2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting Pub Date : 2017-10-18 DOI: 10.1109/APUSNCURSINRSM.2017.8072938
Geng Chen, Lei Zhao, Wenhua Yu, Jianming Jin
{"title":"DGTD method for SAR evaluation in a human head model exposed to a wideband antenna","authors":"Geng Chen, Lei Zhao, Wenhua Yu, Jianming Jin","doi":"10.1109/APUSNCURSINRSM.2017.8072938","DOIUrl":"https://doi.org/10.1109/APUSNCURSINRSM.2017.8072938","url":null,"abstract":"An accurate and fast algorithm is proposed to evaluate the specific absorption rate (SAR) in an anatomically realistic human head model exposed to a wideband antenna. The algorithm is based on the discontinuous Galerkin time domain (DGTD) method using hybrid meshes. Hexahedral and tetrahedral meshes are used, respectively, to model the human head with a voxel data format and the wideband antenna with curved and thin structures. The hexahedral and tetrahedral meshes are connected with pyramidal meshes. The Debye model is used to model the dispersive property of the human head tissues. The efficiency of the proposed algorithm is demonstrated by numerical results for SAR in CMODEL exposed to an ultra-wideband antenna.","PeriodicalId":264754,"journal":{"name":"2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134118469","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}
引用次数: 0
Reconfigurable frequency selective surface for fabry-perot cavity antenna system 法布里-珀罗腔天线系统的可重构频率选择面
2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting Pub Date : 2017-10-18 DOI: 10.1109/APUSNCURSINRSM.2017.8073034
Chanjoon Lee, R. Sainati, Rhonda R. Franklin
{"title":"Reconfigurable frequency selective surface for fabry-perot cavity antenna system","authors":"Chanjoon Lee, R. Sainati, Rhonda R. Franklin","doi":"10.1109/APUSNCURSINRSM.2017.8073034","DOIUrl":"https://doi.org/10.1109/APUSNCURSINRSM.2017.8073034","url":null,"abstract":"This paper presents reconfigurable Fabry-Perot Cavity (FPC) antenna systems to switch one mode to other with respect to near- and far-field performance. The fluidic channel is created and integrated into the FPC system. The channel is filled with air or deionized (DI) water. The fluidic FPC systems are compared to a fixed FPC design without the fluidic housing. Simulation and measurement results are presented and discussed.","PeriodicalId":264754,"journal":{"name":"2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126412369","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}
引用次数: 3
Magnetic-thermal co-simulation of nonlinear magnetic materials at high frequencies 高频非线性磁性材料的磁-热联合模拟
2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting Pub Date : 2017-10-18 DOI: 10.1109/APUSNCURSINRSM.2017.8072602
Su Yan, J. Kotulski, Jianming Jin
{"title":"Magnetic-thermal co-simulation of nonlinear magnetic materials at high frequencies","authors":"Su Yan, J. Kotulski, Jianming Jin","doi":"10.1109/APUSNCURSINRSM.2017.8072602","DOIUrl":"https://doi.org/10.1109/APUSNCURSINRSM.2017.8072602","url":null,"abstract":"A coupled magnetic-thermal solver is developed for the modeling and simulation of nonlinear magnetic materials. By adopting a temperature-dependent dynamic hysteresis model, the magnetic loss is characterized and calculated from the solution of Maxwell's equations, which serves as the heat source in the thermal problem. By solving the thermal problem, the temperature shift is obtained and its effect on the magnetic material property can be quantified, which is then coupled back to Maxwell's equations. The resulting coupled magnetic-thermal system can be solved for both the electromagnetic fields and the temperature, and hence, account for both the electromagnetic and the thermal responses in a high-frequency operation.","PeriodicalId":264754,"journal":{"name":"2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting","volume":"137 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131366295","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}
引用次数: 1
2.4GHz monopole antenna on flexible substrate for implanting sensor 用于植入传感器的柔性衬底2.4GHz单极天线
2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting Pub Date : 2017-10-18 DOI: 10.1109/APUSNCURSINRSM.2017.8072238
H. Kanaya, Kyohei Yamaguchi, Y. Matsushita, Takahiro Kudo, Takuya Furuichi
{"title":"2.4GHz monopole antenna on flexible substrate for implanting sensor","authors":"H. Kanaya, Kyohei Yamaguchi, Y. Matsushita, Takahiro Kudo, Takuya Furuichi","doi":"10.1109/APUSNCURSINRSM.2017.8072238","DOIUrl":"https://doi.org/10.1109/APUSNCURSINRSM.2017.8072238","url":null,"abstract":"This paper presents the design and measurement of a 2.4GHz monopole antenna on flexible substrate for implanting sensor. This antenna is based on a monopole antenna with coplanar waveguide feed line in order to realize the surface mounting device. The antenna size is 8.0 mm × 35 mm and peak realized gain is 1.21 dBi at 2.45GHz in simulation. This antenna has a unidirectional radiation.","PeriodicalId":264754,"journal":{"name":"2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting","volume":"116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124254884","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}
引用次数: 2
Bandwidth and F-B ratio enhancements of an electrically-small crossed-dipole antenna using an NFRP reflector 使用NFRP反射器增强电小型交叉偶极子天线的带宽和F-B比
2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting Pub Date : 2017-10-18 DOI: 10.1109/APUSNCURSINRSM.2017.8072314
S. Ta, I. Park, R. Ziolkowski
{"title":"Bandwidth and F-B ratio enhancements of an electrically-small crossed-dipole antenna using an NFRP reflector","authors":"S. Ta, I. Park, R. Ziolkowski","doi":"10.1109/APUSNCURSINRSM.2017.8072314","DOIUrl":"https://doi.org/10.1109/APUSNCURSINRSM.2017.8072314","url":null,"abstract":"In this paper, a compact single-feed crossed-dipole antenna backed by a near-field resonant parasitic (NFRP) element is proposed to enhance the bandwidth and front-to-back (F-B) ratio of the electrically small antenna system. The NFRP element is designed to not only act as a reflector, but also to generate an extra resonance with circularly polarized (CP) radiation for the antenna system. The extra resonances are utilized to broaden the antenna bandwidth. The final design with an overall size of 35 mm × 35 mm × 13.7 mm (0.184λ<inf>o</inf> × 0.184λ<inf>o</inf> × 0.072λ<inf>o</inf> at 1.575 GHz) has a |S<inf>11</inf>| < −10 dB bandwidth of 20.3% (1.485–1.820 GHz), a 3-dB axial ratio bandwidth of 9.46% (1.510–1.660 GHz), and a maximum F-B ratio of 9.8 dB. Relative to the crossed-dipole antenna without a reflector, the proposed design increases the F-B ratio from 0 to 9.8 dB and achieves approximately 150% and 400% increases in |S|<inf>11</inf>| < −10 dB and 3-dB AR bandwidths, respectively.","PeriodicalId":264754,"journal":{"name":"2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123224818","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}
引用次数: 1
Electrically-small, low-profile, dual-linear and circularly polarized huygens dipole antennas with broadside radiation patterns 电小，低轮廓，双线和圆极化惠更斯偶极天线与宽侧辐射模式
2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting Pub Date : 2017-10-18 DOI: 10.1109/APUSNCURSINRSM.2017.8072316
Wei Lin, R. Ziolkowski
{"title":"Electrically-small, low-profile, dual-linear and circularly polarized huygens dipole antennas with broadside radiation patterns","authors":"Wei Lin, R. Ziolkowski","doi":"10.1109/APUSNCURSINRSM.2017.8072316","DOIUrl":"https://doi.org/10.1109/APUSNCURSINRSM.2017.8072316","url":null,"abstract":"Electrically-small, low-profile, broadside-radiating Huygens dipole antennas are reported that have high radiation efficiencies and are either dual-linear (LP) or circularly (CP) polarized. The Huygens behavior, i.e., a high front-to-back ratio, is realized by exciting two complementary electric and magnetic dipole radiators, simultaneously having the same amplitude and phase. To achieve this design, we modified the electrically-small near-field resonant parasitic (NFRP) Egyptian axe dipole (EAD) antenna to act as the electric radiator and the capacitively loaded loop (CLL) NFRP antenna to act as the magnetic radiator. By organically combining the crossed EAD and CLL NFRP elements together with proper excitations by a pair of driven dipole elements, the resulting electrically small antenna generates broadside Huygens radiation patterns with either dual-LP or CP characteristics. They have ka = 0.87; are low-profile, ∼0.04λ exhibit good radiation performance with 4.54 dBi LP and 4.58 dBic CP peak realized gains; have > 20 dB front-to-back ratios; and have > 93.9% radiation efficiencies at their resonant frequencies. These antenna systems are quite suitable for narrow bandwidth applications including, e.g., wireless power transfer (WPT) to charge batteries in wireless sensors, unmanned aerial vehicles (UAVs), and other compact portable devices.","PeriodicalId":264754,"journal":{"name":"2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121738818","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}
引用次数: 5
A novel ultrawideband FDTD numerical modeling of ground penetrating radar on arbitrary dispersive soils 任意色散土壤上探地雷达超宽带时域有限差分数值模拟
2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting Pub Date : 2017-10-18 DOI: 10.1109/APUSNCURSINRSM.2017.8072450
L. Mescia, P. Bia, D. Caratelli
{"title":"A novel ultrawideband FDTD numerical modeling of ground penetrating radar on arbitrary dispersive soils","authors":"L. Mescia, P. Bia, D. Caratelli","doi":"10.1109/APUSNCURSINRSM.2017.8072450","DOIUrl":"https://doi.org/10.1109/APUSNCURSINRSM.2017.8072450","url":null,"abstract":"A novel two-dimensional (2-D) finite-difference time-domain algorithm for modeling ultrawideband pulse propagation in arbitrary dispersive soils is presented. The soil dispersion is modeled by general power law series representation, accounting for multiple higher order dispersive relaxation processes and ohmic losses, and incorporated into the FDTD scheme by using the fractional derivative operators. The dispersive soil parameters are obtained by fitting the reported experimental data. Moreover, dedicated uniaxial perfectly matched layer for matching dispersive media are derived and implemented in combination with the basic time-marching scheme. Examples are given to verify the numerical solution and demonstrate its applications. The proposed technique features a significantly enhanced accuracy in the solution of complex electromagnetic propagation problems typically encountered in geoscience applications.","PeriodicalId":264754,"journal":{"name":"2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123802439","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}
引用次数: 0
Reactively loaded arrays based on overlapping sub-arrays with flat-top radiation pattern 基于平顶辐射方向图重叠子阵的反应加载阵列
2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting Pub Date : 2017-10-18 DOI: 10.1109/APUSNCURSINRSM.2017.8072555
R. Maximidis, A. B. Smolders, G. Toso, D. Caratelli
{"title":"Reactively loaded arrays based on overlapping sub-arrays with flat-top radiation pattern","authors":"R. Maximidis, A. B. Smolders, G. Toso, D. Caratelli","doi":"10.1109/APUSNCURSINRSM.2017.8072555","DOIUrl":"https://doi.org/10.1109/APUSNCURSINRSM.2017.8072555","url":null,"abstract":"The design of reactively-loaded antenna arrays featuring a pulse-shaped radiation pattern for limited scan-angle applications is presented. The use of the reactive loading allows reducing the complexity of the feeding structure, eliminating the need for complex overlapping beam-forming networks and permitting a drastic reduction in the number of control points.","PeriodicalId":264754,"journal":{"name":"2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting","volume":"52 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126764142","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}
引用次数: 3
Loop antennas with wideband circular polarization 宽带圆极化环形天线
2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting Pub Date : 2017-10-18 DOI: 10.1109/APUSNCURSINRSM.2017.8072294
K. Hirose, K. Okiyama, H. Nakano
{"title":"Loop antennas with wideband circular polarization","authors":"K. Hirose, K. Okiyama, H. Nakano","doi":"10.1109/APUSNCURSINRSM.2017.8072294","DOIUrl":"https://doi.org/10.1109/APUSNCURSINRSM.2017.8072294","url":null,"abstract":"Using the method of moments, we analyze three types of loop antennas with a perturbation segment (PS). Each loop has a single feed and is backed by a ground plane. It is found that the first loop having double PS's shows a circularly polarized (CP) wave bandwidth of 5% for a 3-dB axial-ratio criterion, which is two times wider than that of the second loop having a single PS. Further analysis reveals that a CP wave bandwidth of 9% can be obtained for the third loop having a single PS whose length is greatly increased.","PeriodicalId":264754,"journal":{"name":"2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting","volume":"145 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125645149","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}
引用次数: 1
Numerical benchmark based on characteristic modes of a spherical shell 基于球壳特征模态的数值基准
2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting Pub Date : 2017-10-18 DOI: 10.1109/APUSNCURSINRSM.2017.8072525
M. Capek, Vit Losenicky, L. Jelínek, M. Gustafsson, D. Tayli
{"title":"Numerical benchmark based on characteristic modes of a spherical shell","authors":"M. Capek, Vit Losenicky, L. Jelínek, M. Gustafsson, D. Tayli","doi":"10.1109/APUSNCURSINRSM.2017.8072525","DOIUrl":"https://doi.org/10.1109/APUSNCURSINRSM.2017.8072525","url":null,"abstract":"Characteristic modes of a spherical shell are found analytically and compared with numerical solutions acquired from both in-house and commercial packages. These studies led to a proposal of several independent benchmarks, all with analytically known results. Dependence on mesh size, electrical size and other parameters can easily be incorporated. It is observed that all contemporary implementations have limitations.","PeriodicalId":264754,"journal":{"name":"2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132748127","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}
引用次数: 0
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