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2017 IEEE International Conference on Computational Electromagnetics (ICCEM)最新文献

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Extension of the magnetically mixed Newmark-Leapfrog finite-difference time-domain method to Debye dispersive media 磁混合Newmark-Leapfrog时域有限差分法在Debye色散介质中的推广
2017 IEEE International Conference on Computational Electromagnetics (ICCEM) Pub Date : 2017-03-08 DOI: 10.1109/COMPEM.2017.7912714
K. Fujita
{"title":"Extension of the magnetically mixed Newmark-Leapfrog finite-difference time-domain method to Debye dispersive media","authors":"K. Fujita","doi":"10.1109/COMPEM.2017.7912714","DOIUrl":"https://doi.org/10.1109/COMPEM.2017.7912714","url":null,"abstract":"In this paper, the magnetically mixed Newmark-Leapfrog finite-difference time-domain (MNL-FDTD) method is extended into a Debye model of dielectric dispersion. A frequency-dependent MNL-FDTD scheme is formulated which is based on the recursive convolution formulation in time domain. The resultant scheme has a relaxed stability condition even in the time domain analysis of thin dielectric structures with the Debye model. The input impedance and radiation pattern of a typical antenna with dielectric losses are assessed by the presented scheme. It is verified in comparison with Yee's FDTD.","PeriodicalId":199234,"journal":{"name":"2017 IEEE International Conference on Computational Electromagnetics (ICCEM)","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116093093","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
Frequency tunable antennas based on innovative materials 基于创新材料的频率可调天线
2017 IEEE International Conference on Computational Electromagnetics (ICCEM) Pub Date : 2017-03-08 DOI: 10.1109/COMPEM.2017.7912722
L. Huitema, A. Crunteanu, H. Wong, A. Ghalem, M. Rammal
{"title":"Frequency tunable antennas based on innovative materials","authors":"L. Huitema, A. Crunteanu, H. Wong, A. Ghalem, M. Rammal","doi":"10.1109/COMPEM.2017.7912722","DOIUrl":"https://doi.org/10.1109/COMPEM.2017.7912722","url":null,"abstract":"We report the integration of materials with improved and adapted properties within antenna designs. Two complementary components based on innovative materials are presented in this paper: a VO2 (vanadium dioxide)-based switch and a Ba2/3Sn1/3TiO3 (BST)-based tunable capacitance. The designs of frequency reconfigurable radiating elements are based on slot antennas excited by a microstrip line. This microstrip line has a length that can be conveniently varied using a VO2-based switch. In the case of BST based antennas, the slot is directly loaded by the tunable capacitance. Compared to existing commercial solutions, the proposed devices show better properties with low losses.","PeriodicalId":199234,"journal":{"name":"2017 IEEE International Conference on Computational Electromagnetics (ICCEM)","volume":"237 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115632515","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
Designing metasurface through surface impedance mapping and equivalent circuit model 通过表面阻抗映射和等效电路模型设计超表面
2017 IEEE International Conference on Computational Electromagnetics (ICCEM) Pub Date : 2017-03-08 DOI: 10.1109/COMPEM.2017.7912749
Yijun Feng, Ke Chen, Bo O. Zhu, Junming Zhao, T. Jiang
{"title":"Designing metasurface through surface impedance mapping and equivalent circuit model","authors":"Yijun Feng, Ke Chen, Bo O. Zhu, Junming Zhao, T. Jiang","doi":"10.1109/COMPEM.2017.7912749","DOIUrl":"https://doi.org/10.1109/COMPEM.2017.7912749","url":null,"abstract":"The recently developed concept of two dimensional metamaterial — the metasurface, provides more convenient method to manipulate electromagnetic wave in a designable way within subwavelength distance. However, most of the metasurface designs rely on the meta-atom's properties to achieve certain EM wave control. In this presentation, we propose the top-down design method of metasurface through the surface impedance or admittance mapping targeting certain wave transmission functionality. For the meta-atom design we show the use of equivalent circuit model in the design procedure which effectively eases the choice of meta-atom that provides the required surface impedance. As an example, we demonstrate the design of an active Huygens' planar metalens that could achieve dynamic and arbitrary focusing of electromagnetic wave in real-time.","PeriodicalId":199234,"journal":{"name":"2017 IEEE International Conference on Computational Electromagnetics (ICCEM)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123507670","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
A dual band dual polarization slot patch antenna 一种双波段双极化缝隙贴片天线
2017 IEEE International Conference on Computational Electromagnetics (ICCEM) Pub Date : 2017-03-08 DOI: 10.1109/COMPEM.2017.7912803
Jianling Chen, Junhong Wang, K. Tong, A. Al-armaghany
{"title":"A dual band dual polarization slot patch antenna","authors":"Jianling Chen, Junhong Wang, K. Tong, A. Al-armaghany","doi":"10.1109/COMPEM.2017.7912803","DOIUrl":"https://doi.org/10.1109/COMPEM.2017.7912803","url":null,"abstract":"A dual band and dual polarization slot patch antenna for Global Positioning System (GPS) and wireless LAN network with the corresponding polarizations is proposed. An L-shaped slot and a small stub are utilized to excite the desirable right-hand circular polarization (RHCP) for GPS. Meanwhile the linearly polarized electromagnetic wave for Wi-Fi communications at 2.4 GHz is contributed by an arc-shaped slot embedded circular patch. The multi-layered geometry and the capacitive feeding disk placed between the substrate layers enhance the operating bandwidths of the antenna. The achievable percentage bandwidths at the low and high bands are 6.4% and 7% respectively. The measured 3dB axial ratio (AR) bandwidth is 34 MHz, which covers the GPS L1 band.","PeriodicalId":199234,"journal":{"name":"2017 IEEE International Conference on Computational Electromagnetics (ICCEM)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122697347","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: 4
Q-factor evaluation of traveling-wave ring resonator in Magnet-less Non-reciprocal Metamaterial (MNM) 无磁非互易超材料(MNM)行波环形谐振器的q因子评价
2017 IEEE International Conference on Computational Electromagnetics (ICCEM) Pub Date : 2017-03-08 DOI: 10.1109/COMPEM.2017.7912731
T. Kodera
{"title":"Q-factor evaluation of traveling-wave ring resonator in Magnet-less Non-reciprocal Metamaterial (MNM)","authors":"T. Kodera","doi":"10.1109/COMPEM.2017.7912731","DOIUrl":"https://doi.org/10.1109/COMPEM.2017.7912731","url":null,"abstract":"MNM (Magnet-less Non-reciprocal Metmaterial) is a technology to realize gyrotropic magnetic response by the combination of uni-directional component and resonant particle. As same as natural magnetic material, performance can be evaluated by half value of resonance width, which is inverse to Q-factor from viewpoint of resonator. In this paper, Q-factor of a unit-cell of MNM is estimated by circuit model consisting of FET and resonator model. The result clearly indicate the Q-factor of MNM unit-cell clearly depends on external factors expressed by load, which can be attributed to electromagnetic coupling to another system.","PeriodicalId":199234,"journal":{"name":"2017 IEEE International Conference on Computational Electromagnetics (ICCEM)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124953528","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
Compact MIMO antenna with embedded decoupling network 嵌入式解耦网络的小型MIMO天线
2017 IEEE International Conference on Computational Electromagnetics (ICCEM) Pub Date : 2017-03-08 DOI: 10.1109/COMPEM.2017.7912727
Xiu Yin Zhang, Cheng-Dai Xue, Y. Cao, Chao-feng Ding
{"title":"Compact MIMO antenna with embedded decoupling network","authors":"Xiu Yin Zhang, Cheng-Dai Xue, Y. Cao, Chao-feng Ding","doi":"10.1109/COMPEM.2017.7912727","DOIUrl":"https://doi.org/10.1109/COMPEM.2017.7912727","url":null,"abstract":"In this paper, a compact multiple-input-multiple-output (MIMO) antenna with embedded network is presented. The MIMO antenna consists of two symmetric monopoles with edge-to-edge separation of only 0.01 λ at 3.5 GHz. To enhance the isolation, a decoupling network is designed and embedded between the two antennas, which does not increase the footprint of the antenna system. It is observed that the coupling current is trapped by the network and cannot be transmitted to the adjacent antenna. In the way, |S11| ≤−10dB and |S21| ≤−20dB are achieved over the band from 3.4 GHz–3.6 GHz. Compared with the antennas without decoupling, the isolation is improved from around 6 dB to more than 40 dB. Additionally, the envelope correlation coefficient (ECC) of proposed antennas is reduced to smaller than 0.03 and the total efficiency is increased by over 10%. The measured results are in good agreement with the theoretical and simulated ones.","PeriodicalId":199234,"journal":{"name":"2017 IEEE International Conference on Computational Electromagnetics (ICCEM)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129553353","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: 4
Efficient finite-difference time-domain modeling of short-gap electrostatic discharge caused in the vicinity of a complex electronic system 复杂电子系统附近引起的短间隙静电放电的有效时域有限差分建模
2017 IEEE International Conference on Computational Electromagnetics (ICCEM) Pub Date : 2017-03-08 DOI: 10.1109/COMPEM.2017.7912715
K. Fujita
{"title":"Efficient finite-difference time-domain modeling of short-gap electrostatic discharge caused in the vicinity of a complex electronic system","authors":"K. Fujita","doi":"10.1109/COMPEM.2017.7912715","DOIUrl":"https://doi.org/10.1109/COMPEM.2017.7912715","url":null,"abstract":"This paper addresses efficient finite-difference time-domain (FDTD) modeling of transient interactions of complex electronic systems with electrostatic discharge occurred at a short air gap. A partially implicit FDTD scheme with the nonlinear spark resistance model by Rompe and Weizel is applied to a realistic personal computer model. Its efficiency and accuracy are assessed in comparison with Yee's FDTD method.","PeriodicalId":199234,"journal":{"name":"2017 IEEE International Conference on Computational Electromagnetics (ICCEM)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127211172","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
Reconfigurable stealth radome using active frequency selective surface technology 采用主动频率选择表面技术的可重构隐身天线罩
2017 IEEE International Conference on Computational Electromagnetics (ICCEM) Pub Date : 2017-03-08 DOI: 10.1109/COMPEM.2017.7912729
Y. Sui, Hao Gu, Chenchen Yang
{"title":"Reconfigurable stealth radome using active frequency selective surface technology","authors":"Y. Sui, Hao Gu, Chenchen Yang","doi":"10.1109/COMPEM.2017.7912729","DOIUrl":"https://doi.org/10.1109/COMPEM.2017.7912729","url":null,"abstract":"Frequency Selective Surface (FSS) stealth radome is the new development of radome, however the “being stealth in-band” limit still has not been well solved. Active FSS (AFSS) with reconfigurable performance can change its characteristic via external control and realize “invisible-all-band” by “time-domain-stealth” feature. In this paper, an AFSS working at X-band with excellent filter performance is designed, which keeps band-pass at OFF state while shifts to shielding at ON state. According to both transparent and opaque states of AFSS, we have simulated and compared the backward mono-static RCS of dielectric and metal radomes with antenna model inside respectively. The results show that AFSS technology can reduce the RCS of specular reflection of antenna inside the radome up to 10dB, and keep the RCS of radome-antenna system at a low level (<−10dB) in the range of −60° to +60°. The reconfigurable Stealth radome will provide more potential and attractive applications in electronic warfare of future.","PeriodicalId":199234,"journal":{"name":"2017 IEEE International Conference on Computational Electromagnetics (ICCEM)","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126036325","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: 9
How to estimate the coupling Q factor from two-port 5-parameters 如何估计双端口5参数的耦合Q因子
2017 IEEE International Conference on Computational Electromagnetics (ICCEM) Pub Date : 2017-03-08 DOI: 10.1109/COMPEM.2017.7912719
T. Ohira
{"title":"How to estimate the coupling Q factor from two-port 5-parameters","authors":"T. Ohira","doi":"10.1109/COMPEM.2017.7912719","DOIUrl":"https://doi.org/10.1109/COMPEM.2017.7912719","url":null,"abstract":"This paper presents a sequential procedure to estimate the coupling quality factor (kQ) for general reciprocal two-port systems. Starting from the well-known impedance matrix, we focus on its non-diagonal component as a transfer function. It is normalized by the equivalent scalar resistance (ESR). The ESR is regarded as an extension of one-port effective series resistance to two-port schemes. This normalization finally leads to a versatile formula for kQ. The sequence also extends to the reactance compensation by two-port simultaneous resonance, and the optimum load resistance that maximizes power transfer efficiency.","PeriodicalId":199234,"journal":{"name":"2017 IEEE International Conference on Computational Electromagnetics (ICCEM)","volume":"143 1-2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129425155","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: 6
Four antennas on smart watch for GPS/UMTS/ WLAN MIMO application 智能手表上的四个天线，用于GPS/UMTS/ WLAN MIMO应用
2017 IEEE International Conference on Computational Electromagnetics (ICCEM) Pub Date : 2017-03-08 DOI: 10.1109/COMPEM.2017.7912744
Chien-Min Cheng, Wen‐Shan Chen, Guan-Quan Lin, Hua‐Ming Chen
{"title":"Four antennas on smart watch for GPS/UMTS/ WLAN MIMO application","authors":"Chien-Min Cheng, Wen‐Shan Chen, Guan-Quan Lin, Hua‐Ming Chen","doi":"10.1109/COMPEM.2017.7912744","DOIUrl":"https://doi.org/10.1109/COMPEM.2017.7912744","url":null,"abstract":"The paper presents a design with four antennas on smart watch for GPS/UMTS/WLAN MIMO application. The overall dimensions of the design are 40 mm × 40 mm × 5.4 mm. The size of the main ground plane is 40 mm × 40 mm × 0.4 mm. These antennas are using the coupled-fed architecture. They are fed by 50-ohm mini coaxial cable lines. The four antennas are placed vertically to the edges of the main ground plane. The GPS and UMTS antennas are designed as open slot antennas; the two WLAN antennas are designed as monopole antennas. The obtained bandwidths can cover the bands of GPS/UMTS/WLAN MIMO; the isolation between these antennas is larger than 15dB. The design covering UMTS (1.92–1.98 GHz, 2.11–2.17 GHz), GPS (1.575 GHz), MIMO WLAN (2.4–2.484 GHz) and with compact and easy to design is good for antennas of smart watch devices.","PeriodicalId":199234,"journal":{"name":"2017 IEEE International Conference on Computational Electromagnetics (ICCEM)","volume":" 12","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120826910","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: 12
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