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2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting最新文献

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Using FDTD to improve our understanding of partial wave spectroscopy for advancing ultra early-stage cancer detection techniques 利用时域有限差分法提高我们对部分波光谱的理解，以推进超早期癌症检测技术
2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting Pub Date : 2009-03-24 DOI: 10.1109/ANTEMURSI.2009.4805114
J. Simpson, I. Çapoglu, V. Backman
{"title":"Using FDTD to improve our understanding of partial wave spectroscopy for advancing ultra early-stage cancer detection techniques","authors":"J. Simpson, I. Çapoglu, V. Backman","doi":"10.1109/ANTEMURSI.2009.4805114","DOIUrl":"https://doi.org/10.1109/ANTEMURSI.2009.4805114","url":null,"abstract":"We present numerical modeling techniques and results geared towards improving our understanding of the physical basis underlying partial wave spectroscopy. This work is in support of an ongoing effort in developing and advancing ultra early-stage cancer detection techniques. First, our initial finite-difference time-domain (FDTD) modeling methodology and results for synthesizing partial wave spectroscopy are presented for an inhomogeneous dielectric sphere. Next, we compare these modeling results with those of a one-dimensional layered slab model for testing whether photons interact primarily one-dimensionally with three-dimensional objects in creating partial wave spectroscopy spectra. We then present a working hypothesis and our preliminary work for improving the correlation between the FDTD-generated results and the 1-D layered slab model by implementing a focused beam instead of a plane wave excitation.","PeriodicalId":190053,"journal":{"name":"2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting","volume":"170 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121255825","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
Higher-order modes in rectangular DRAs for gain enhancement 用于增益增强的矩形dra中的高阶模式
2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting Pub Date : 2009-03-24 DOI: 10.1109/ANTEMURSI.2009.4805098
A. Petosa, S. Thirakoune, A. Ittipiboon
{"title":"Higher-order modes in rectangular DRAs for gain enhancement","authors":"A. Petosa, S. Thirakoune, A. Ittipiboon","doi":"10.1109/ANTEMURSI.2009.4805098","DOIUrl":"https://doi.org/10.1109/ANTEMURSI.2009.4805098","url":null,"abstract":"The use of higher-order modes of a rectangular dielectric resonator antenna (DRA) are investigated for increasing directivity. Using the TE<sup>x</sup><inf>δ15</inf> mode, a directivity of almost 11 dB has been simulated for a DRA operating at 10.6 GHz.","PeriodicalId":190053,"journal":{"name":"2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126159327","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: 20
Distance measurements to radio supernova remnants 射电超新星遗迹的距离测量
2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting Pub Date : 2009-03-24 DOI: 10.1109/ANTEMURSI.2009.4805122
W. Tian, D. Leahy
{"title":"Distance measurements to radio supernova remnants","authors":"W. Tian, D. Leahy","doi":"10.1109/ANTEMURSI.2009.4805122","DOIUrl":"https://doi.org/10.1109/ANTEMURSI.2009.4805122","url":null,"abstract":"We briefly review methods to measure the distances to Galactic radio supernova remnants (SNRs) and objects associated (pulsars and HII regions). We highlight new methods we have developed by giving results from HI and 13CO line spectra of some SNRs. The methods advance traditional methods of HI-absorption-determined-distance to an SNR due to improving background subtraction and spurious emission rejection, and resolving the near/far distance ambiguity in the inner Galaxy. New distances to several SNRs, i.e. W41, G21.5∓0.9, G54.1+0.3, Kes 67, Kes 69, Kes 73 and Kes 75, have been determined.","PeriodicalId":190053,"journal":{"name":"2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126711986","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
Transient Electromagnetic Fields associated with a power transmission line above a lossy ground 在有损耗的地面上与输电线路有关的瞬态电磁场
2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting Pub Date : 2009-03-24 DOI: 10.1109/ANTEMURSI.2009.4805118
P. Taheri, B. Kordi, A. Gole
{"title":"Transient Electromagnetic Fields associated with a power transmission line above a lossy ground","authors":"P. Taheri, B. Kordi, A. Gole","doi":"10.1109/ANTEMURSI.2009.4805118","DOIUrl":"https://doi.org/10.1109/ANTEMURSI.2009.4805118","url":null,"abstract":"This paper provides a step by step procedure for the computation of electromagnetic (EM) fields in the vicinity of power transmission lines. By decomposing the transmission line into a number of Hertzian dipoles, the electric and magnetic fields at any point above the ground can be found by summing up the contribution of each segment. Two analytical frequency-domain approaches for the calculation of radiation from a horizontal electric dipole (HED) located above a finitely conducting ground are implemented and compared. Numerical electromagnetic code (NEC-4) is used in order to verify the results.","PeriodicalId":190053,"journal":{"name":"2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116581829","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
A low weight S-band quadrifilar helical antenna for satellite communication 一种用于卫星通信的低重量s波段四线螺旋天线
2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting Pub Date : 2009-03-24 DOI: 10.1109/ANTEMURSI.2009.4805055
A. Chapari, Z. Firouzeh, R. Moini, S. Sadeghi
{"title":"A low weight S-band quadrifilar helical antenna for satellite communication","authors":"A. Chapari, Z. Firouzeh, R. Moini, S. Sadeghi","doi":"10.1109/ANTEMURSI.2009.4805055","DOIUrl":"https://doi.org/10.1109/ANTEMURSI.2009.4805055","url":null,"abstract":"In this paper, a new design of an S-band, self-phased, one-turn quadrifilar helical antenna (QHA) has been presented. The antenna has been analyzed in purposed of desired radiation pattern by numerical method. A new matching technique has been used to improve VSWR of the QHA. The eperimental results show the radiation pattern has Nadir null of about 6dB and Axial Ratio is better than 1dB. In addition, VSWR is less than 2 in frequency bandwidth of 120MHz. The anttena has low weight, size and cost which is suitable for satellite communication systems.","PeriodicalId":190053,"journal":{"name":"2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting","volume":"188 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130739677","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
A holographic antenna approach to improve the surface wave efficiency and gain of a microstrip patch 提高微带贴片表面波效率和增益的全息天线方法
2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting Pub Date : 2009-03-24 DOI: 10.1109/ANTEMURSI.2009.4805117
A. Sutinjo, M. Okoniewski, R. Johnston
{"title":"A holographic antenna approach to improve the surface wave efficiency and gain of a microstrip patch","authors":"A. Sutinjo, M. Okoniewski, R. Johnston","doi":"10.1109/ANTEMURSI.2009.4805117","DOIUrl":"https://doi.org/10.1109/ANTEMURSI.2009.4805117","url":null,"abstract":"The holographic antenna approach is adapted for operation in the microstrip regime to re-radiate the surface wave (SW) excited by the patch antenna. This paper discusses the design of the holographic surface, as well as its integration with the microstrip patch. The initial design concept was developed by assuming small perturbation to the SW, which was subsequently verified through full-wave Method-of-Moments (MoM) simulations. While this method is simple and intuitive, it will be shown that significant improvement to the broadside gain and SW efficiency of the microstrip patch can be achieved at the cost of increased area.","PeriodicalId":190053,"journal":{"name":"2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121425797","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
A compact and broadband NRI-TL metamaterial monopole antenna 一种紧凑宽频NRI-TL超材料单极天线
2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting Pub Date : 2009-03-24 DOI: 10.1109/ANTEMURSI.2009.4805042
M. Antoniades, G. Eleftheriades
{"title":"A compact and broadband NRI-TL metamaterial monopole antenna","authors":"M. Antoniades, G. Eleftheriades","doi":"10.1109/ANTEMURSI.2009.4805042","DOIUrl":"https://doi.org/10.1109/ANTEMURSI.2009.4805042","url":null,"abstract":"A compact and broadband negative-refractive-index transmission-line (NRI-TL) metamaterial antenna is proposed, which consists of a conventional printed monopole loaded in a left-handed fashion. The metamaterial loading allows the antenna to be modeled as a short folded monopole around 5.5 GHz, and simultaneously acts as a a balun for the ground plane around 3.55 GHz, therefore enabling the ground plane to radiate at this frequency. Consequently, the metamaterial-loaded monopole antenna exhibits a very wide impedance bandwidth by virtue of the orthogonality between these two radiating modes. The NRITL metamaterial monopole antenna has a simulated -10 dB return-loss bandwidth of 3.84 GHz while maintaining a very high efficiency in the order of 90%, and achieves orthogonal pattern diversity in both the 3.3 - 3.8 GHz WiMax and 5.15 - 5.85 GHz WiFi bands.","PeriodicalId":190053,"journal":{"name":"2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115035516","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
A compact UWB butterfly shaped planar monopole antenna with bandstop characteristic 一种具有带阻特性的小型超宽带蝶形平面单极天线
2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting Pub Date : 2009-03-24 DOI: 10.1109/ANTEMURSI.2009.4805040
Osama Fekry Ahmed, A. Sebak
{"title":"A compact UWB butterfly shaped planar monopole antenna with bandstop characteristic","authors":"Osama Fekry Ahmed, A. Sebak","doi":"10.1109/ANTEMURSI.2009.4805040","DOIUrl":"https://doi.org/10.1109/ANTEMURSI.2009.4805040","url":null,"abstract":"In this paper, a novel compact butterfly shaped planar monopole ultra-wideband (UWB) antenna is presented. This antenna is proposed and designed with a standard printed circuit board (PCB) process for suitable integration with MMICs and other components. The calculated impedance bandwidth of the proposed antenna ranges from 3GHz to 12GHz for a return loss S11 less than -10dB. Also, it has a relatively stable radiation patterns over its whole frequency band of interest. By introducing a slit ring resonator (SRR) in the feedline, a bandstop of 830MHz (from 5.0 to 5.83GHz) for band rejection of WLAN can be achieved. So, the proposed antenna is considered a good candidate for UWB applications.","PeriodicalId":190053,"journal":{"name":"2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132997824","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
Design of a new wire bow-tie antenna for ultrawide-band GPR applications using multi-objective genetic algorithm 应用多目标遗传算法设计一种新型超宽带探地雷达天线
2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting Pub Date : 2009-03-24 DOI: 10.1109/ANTEMURSI.2009.4805110
H.S. Faraji, R. Moini, S. Sadeghi, H. Talebi
{"title":"Design of a new wire bow-tie antenna for ultrawide-band GPR applications using multi-objective genetic algorithm","authors":"H.S. Faraji, R. Moini, S. Sadeghi, H. Talebi","doi":"10.1109/ANTEMURSI.2009.4805110","DOIUrl":"https://doi.org/10.1109/ANTEMURSI.2009.4805110","url":null,"abstract":"In this paper, a modified resistively loaded Wire-bow is designed for impulse ground-penetrating radar applications. The new Bow-tie is improved in terms of VSWR and band width. The improvements are achieved by tapering the arms and applying genetic algorithm to choose the optimum parameters for the tapered configuration. Curving arms is designed to decrease the reflection at the drive point, which in turn increases energy radiated to the ground. Genetic algorithm is applied to find the optimum curved antenna parameters. The objective function is composed of broadband performance and VSWR which constitutes a multi-objective optimization problem. The genetic algorithm is used to find, the optimal parameters for the antenna, i.e., resistive loads, loads' locations, number of arms and angular distances between arms. The performance of the proposed antenna is validated in terms of bandwidth and VSWR. Simulation results are presentated to validate the effectiveness of the new antenna as compared with those antennas previously reported in the literatures.","PeriodicalId":190053,"journal":{"name":"2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131564576","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
Buried cable parameter extraction using a full-space unbounded conformal mapping technique 利用全空间无界保角映射技术提取埋地电缆参数
2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting Pub Date : 2009-03-24 DOI: 10.1109/ANTEMURSI.2009.4805046
S. Bonyadi-ram, B. Kordi, G. Bridges
{"title":"Buried cable parameter extraction using a full-space unbounded conformal mapping technique","authors":"S. Bonyadi-ram, B. Kordi, G. Bridges","doi":"10.1109/ANTEMURSI.2009.4805046","DOIUrl":"https://doi.org/10.1109/ANTEMURSI.2009.4805046","url":null,"abstract":"In this paper a full-space conformal mapping technique is used to extract the parameters of buried multiconductor cables. The quasi-electric and quasi-magnetic approximations of Helmholtz equation are employed and necessary scaling factors are applied to the governing equations and post processing energy relations. The modified equations are numerically solved using a Finite-Element-based method. The calculated results for typical buried circular cable geometries are compared with those obtained from bounded-space cases and with analytic formulation. Comparison shows very a good agreement between analytical and the mapping technique results in a wide frequency range.","PeriodicalId":190053,"journal":{"name":"2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116447598","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
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