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2012 IEEE Asia-Pacific Conference on Antennas and Propagation最新文献

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Array design techniques of microstrip comb-line antennas in millimeter-wave band 毫米波微带梳线天线阵列设计技术
2012 IEEE Asia-Pacific Conference on Antennas and Propagation Pub Date : 2012-10-18 DOI: 10.1109/APCAP.2012.6333160
K. Sakakibara, N. Kikuma, H. Hirayama
{"title":"Array design techniques of microstrip comb-line antennas in millimeter-wave band","authors":"K. Sakakibara, N. Kikuma, H. Hirayama","doi":"10.1109/APCAP.2012.6333160","DOIUrl":"https://doi.org/10.1109/APCAP.2012.6333160","url":null,"abstract":"Traveling-wave array design techniques are applied to microstrip comb-line antennas in the millimeter-wave band. The simple design procedure is demonstrated. To neglect the effect of reflection waves in the design, a radiating element with a reflection-canceling slit and a stub-integrated radiating element are proposed. Matching performance is also improved.","PeriodicalId":178493,"journal":{"name":"2012 IEEE Asia-Pacific Conference on Antennas and Propagation","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131009757","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
Experimental study on transient establishment of negative refraction 负折射瞬态建立的实验研究
2012 IEEE Asia-Pacific Conference on Antennas and Propagation Pub Date : 2012-10-18 DOI: 10.1109/APCAP.2012.6333262
Yewen Zhang, Liwei Zhang, K. Fang, Fangfei Li, Hong Chen
{"title":"Experimental study on transient establishment of negative refraction","authors":"Yewen Zhang, Liwei Zhang, K. Fang, Fangfei Li, Hong Chen","doi":"10.1109/APCAP.2012.6333262","DOIUrl":"https://doi.org/10.1109/APCAP.2012.6333262","url":null,"abstract":"A negative refraction interface composed of a positive and negative refractive index material is realized by using two-dimensional transmission line grids. The transient interface reflection and refraction properties are studied by time-domain method where the time evolution of an electromagnetic wave as it hits the interface is simulated and measured. It is found that the wave is trapped temporarily at the interface, reorganizes, and after a certain time, the refractive wave front moves eventually in the negative direction. What's more the refractive wave need longer time to build up than the reflected wave. Experiment results agree well with the simulations.","PeriodicalId":178493,"journal":{"name":"2012 IEEE Asia-Pacific Conference on Antennas and Propagation","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132393877","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
Modeling of reverberation chamber using FMM-Accelerated hybrid integral equation 混响室的fmm加速混合积分方程建模
2012 IEEE Asia-Pacific Conference on Antennas and Propagation Pub Date : 2012-10-18 DOI: 10.1109/APCAP.2012.6333222
Huapeng Zhao, E. Li, Z. Shen
{"title":"Modeling of reverberation chamber using FMM-Accelerated hybrid integral equation","authors":"Huapeng Zhao, E. Li, Z. Shen","doi":"10.1109/APCAP.2012.6333222","DOIUrl":"https://doi.org/10.1109/APCAP.2012.6333222","url":null,"abstract":"Iterative solvers suffer from slow convergence in modeling a highly resonant reverberation chamber (RC). In this paper, a hybrid integral equation accelerated by the fast multiple method (FMM) is utilized to model RC and to improve the convergence behavior. The hybrid method's performance is studied and the error introduced by the FMM is analyzed. It is found that the truncation error of multi-pole expansion can be significant in some cases, which may become critical in modeling highly resonant structures like the RC.","PeriodicalId":178493,"journal":{"name":"2012 IEEE Asia-Pacific Conference on Antennas and Propagation","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132721195","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
The study of signal strength threshold for VoIP handoff process in 802.11g/n networks 802.11g/n网络中VoIP切换过程的信号强度阈值研究
2012 IEEE Asia-Pacific Conference on Antennas and Propagation Pub Date : 2012-10-18 DOI: 10.1109/APCAP.2012.6333198
Amnart Jongmobklang, P. Uthansakul, M. Uthansakul
{"title":"The study of signal strength threshold for VoIP handoff process in 802.11g/n networks","authors":"Amnart Jongmobklang, P. Uthansakul, M. Uthansakul","doi":"10.1109/APCAP.2012.6333198","DOIUrl":"https://doi.org/10.1109/APCAP.2012.6333198","url":null,"abstract":"In standard IEEE 802.11 based systems, when the wireless client migrates away from the radio range of the currently associated Access Point (AP), network applications temporarily loose connectivity till the client is able to re-associate itself with a new AP. The delay that occurs during the break-off interval can vary from a few hundreds of microseconds to a few seconds. However, delay sensitive applications such as Voice over IP (VoIP) or streaming multimedia applications usually are unable to tolerate such long connectivity delays that fall beyond the range of 50-200 ms. This results in dropped calls or frozen video frames. To improve the deficiency, this paper proposes the preliminary study of managing the signal strength threshold to minimize handoff time by investigating the effect of changing the threshold at AP. Although different solutions are available in the literature, most of them proposed changes that were outside the purview of the current 802.11 standards. Our study requires no additional support from the network. The outcome of this paper indicates the good insight of using the signal strength threshold to control the handoff time for VoIP application.","PeriodicalId":178493,"journal":{"name":"2012 IEEE Asia-Pacific Conference on Antennas and Propagation","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134127276","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
Circularly polarized UHF-RFID antenna using defected rectangular plate on the ground plane 圆极化UHF-RFID天线在地平面上使用有缺陷的矩形板
2012 IEEE Asia-Pacific Conference on Antennas and Propagation Pub Date : 2012-10-18 DOI: 10.1109/APCAP.2012.6333157
C. Phongcharoenpanich, S. Dentri
{"title":"Circularly polarized UHF-RFID antenna using defected rectangular plate on the ground plane","authors":"C. Phongcharoenpanich, S. Dentri","doi":"10.1109/APCAP.2012.6333157","DOIUrl":"https://doi.org/10.1109/APCAP.2012.6333157","url":null,"abstract":"This paper presents a UHF-RFID reader antenna radiating circular polarization with unidirectional pattern. The antenna structure consists of two plates. The upper plate acted as radiating element contains notched rectangular plate, rectangular aperture and slot line. The lower plate is the ground plane. The parametric study is carried out to achieve the frequency response of 920-925 MHz according to Thailand standard of UHF-RFID system. The prototype antenna was fabricated and measured. The simulated half-power beamwidth (HPBW) in E- and H-planes are 65 and 68 degree, respectively. The measured HPBW in both planes is identical to 55 degree. The simulated and measured bandwidths are 7.26% and 10.7%, respectively. The simulated and measured axial ratios at 922.5 MHz are 0.64 dB and 0.09 dB, respectively.","PeriodicalId":178493,"journal":{"name":"2012 IEEE Asia-Pacific Conference on Antennas and Propagation","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116977426","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
Gain enhancement of antipodal tapered slot antenna using zero-index metamaterial 利用零折射率超材料增强对映锥形缝隙天线的增益
2012 IEEE Asia-Pacific Conference on Antennas and Propagation Pub Date : 2012-10-18 DOI: 10.1109/APCAP.2012.6333152
Mei Sun, Zhi Ning Chen, X. Qing
{"title":"Gain enhancement of antipodal tapered slot antenna using zero-index metamaterial","authors":"Mei Sun, Zhi Ning Chen, X. Qing","doi":"10.1109/APCAP.2012.6333152","DOIUrl":"https://doi.org/10.1109/APCAP.2012.6333152","url":null,"abstract":"A zero-index metamaterial (ZIM) structure is proposed for the gain enhancement of a tapered slot antenna. An antipodal tapered slot antenna (ATSA) prototype loaded with the proposed ZIM cells exhibits a gain enhancement of up to 6 dB in the frequency band of 7-13.5 GHz.","PeriodicalId":178493,"journal":{"name":"2012 IEEE Asia-Pacific Conference on Antennas and Propagation","volume":"3 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116663459","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: 10
Partly combined field integral equation for electromagnetic radiation problems 电磁辐射问题的部分组合场积分方程
2012 IEEE Asia-Pacific Conference on Antennas and Propagation Pub Date : 2012-10-18 DOI: 10.1109/APCAP.2012.6333209
Ming Zhang
{"title":"Partly combined field integral equation for electromagnetic radiation problems","authors":"Ming Zhang","doi":"10.1109/APCAP.2012.6333209","DOIUrl":"https://doi.org/10.1109/APCAP.2012.6333209","url":null,"abstract":"A partly combined field integral equation (PCFIE) is proposed to deal with the electromagnetic radiation of antennas mounted on a large platform. In this method, the electrical filed integral equation (EFIE) is applied to wires and wire-surface junction parts, while the combined field integral equation (CFIE) is applied to the closed remaining part of the platform. Numerical results show that the convergence rate of the PCFIE is much better than that of EFIE when the iterative method is used to solve the electromagnetic radiation problem of a monopole antenna mounted on a sphere.","PeriodicalId":178493,"journal":{"name":"2012 IEEE Asia-Pacific Conference on Antennas and Propagation","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117148440","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
Ultimate miniturization of plasmonic travelling-wave resonators 等离子行波谐振器的终极小型化
2012 IEEE Asia-Pacific Conference on Antennas and Propagation Pub Date : 2012-10-18 DOI: 10.1109/APCAP.2012.6333183
Haifeng Zhou, Xianshu Luo, Shiyang Zhu, Guo-Qiang Lo
{"title":"Ultimate miniturization of plasmonic travelling-wave resonators","authors":"Haifeng Zhou, Xianshu Luo, Shiyang Zhu, Guo-Qiang Lo","doi":"10.1109/APCAP.2012.6333183","DOIUrl":"https://doi.org/10.1109/APCAP.2012.6333183","url":null,"abstract":"By virtue of the origin of mode resonances, we made comparison analysis for sub-micron pure Si disk cavities and metal-capped Si disks that would be demonstrated by the matured CMOS technologies. A notch filter composed of a 500nm-radius metal-capped disk was numerically demonstrated by using our finite difference time domain codes.","PeriodicalId":178493,"journal":{"name":"2012 IEEE Asia-Pacific Conference on Antennas and Propagation","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126618467","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
Localisation of body-worn sensors applying Ultra Wideband technology 应用超宽带技术的穿戴式传感器的本地化
2012 IEEE Asia-Pacific Conference on Antennas and Propagation Pub Date : 2012-10-18 DOI: 10.1109/APCAP.2012.6333170
R. Bharadwaj, A. Alomainy, C. Parini
{"title":"Localisation of body-worn sensors applying Ultra Wideband technology","authors":"R. Bharadwaj, A. Alomainy, C. Parini","doi":"10.1109/APCAP.2012.6333170","DOIUrl":"https://doi.org/10.1109/APCAP.2012.6333170","url":null,"abstract":"This paper presents a study of 3D human body localisation using Ultra Wideband technology. Cube and Y shape base station configurations, time of arrival and first peak detection algorithms are used to estimate the position of the sensors that are placed near the surface of the body. Also spherical coordinate system is used to find the direction of the target. A comparative study is done between the TOA and TDOA method in terms of accuracy obtained in estimation of known coordinates. Results show that accuracy in estimation of location of the sensor depends on position it is placed on the human body as the presence of body would cause interference. The overall average accuracy in 3D localisation is around 2.5 to 4.5 cm for TOA method and 3.5 to 4.5 cm for TDOA method.","PeriodicalId":178493,"journal":{"name":"2012 IEEE Asia-Pacific Conference on Antennas and Propagation","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126724440","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
Design and modeling of monolithic integrated millimeterwave chip-package antennas and wireless communication links 单片集成毫米波芯片封装天线和无线通信链路的设计与建模
2012 IEEE Asia-Pacific Conference on Antennas and Propagation Pub Date : 2012-10-18 DOI: 10.1109/APCAP.2012.6333221
J. Russer, F. Mukhtar, S. Wane, D. Bajon, P. Russer
{"title":"Design and modeling of monolithic integrated millimeterwave chip-package antennas and wireless communication links","authors":"J. Russer, F. Mukhtar, S. Wane, D. Bajon, P. Russer","doi":"10.1109/APCAP.2012.6333221","DOIUrl":"https://doi.org/10.1109/APCAP.2012.6333221","url":null,"abstract":"The design of a silicon monolithic integrated antenna for millimeterwave sensing and on-chip communication applications is presented. To enable an efficient co-design with monolithic integrated mixed-signal circuits on the system-on-chip level, a compact lumped element circuit model for an on-chip communication link is extracted from measurement data of the on-chip communication link. The circuit model is of generalized Foster type and accounts also for the losses. Design, measurement and modeling results are presented.","PeriodicalId":178493,"journal":{"name":"2012 IEEE Asia-Pacific Conference on Antennas and Propagation","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126764500","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: 10
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