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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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Experimental validation of thin-wire FVTD models 细丝FVTD模型的实验验证
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.2009.4805126
A. Zakaria, Cameron Kaye, I. Jeffrey, J. Lovetri
{"title":"Experimental validation of thin-wire FVTD models","authors":"A. Zakaria, Cameron Kaye, I. Jeffrey, J. Lovetri","doi":"10.1109/ANTEMURSI.2009.4805126","DOIUrl":"https://doi.org/10.1109/ANTEMURSI.2009.4805126","url":null,"abstract":"Thin-wire models for the FVTD algorithm are validated using various monopole configurations above a finite ground plane. The thin-wire model is derived from the original Holland-Simpson formulation, extended by Edelvik for the finite-element method, and requires a parameter which dictates the region around each wire wherein coupling between the field variables and the current and voltage variables on the thin wire occurs. It is shown how S11 and S21 parameters can be derived from current and voltage variables on the wire, and these were successfully reproduced for the monopole configurations tested. Both straight and bent monopoles are investigated.","PeriodicalId":190053,"journal":{"name":"2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting","volume":"8 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":"115351314","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
Realization and characterization of a 77 GHz reconfigurable liquid crystal reflectarray 77 GHz可重构液晶反射阵列的实现与特性研究
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.2009.4805092
A. Moessinger, S. Dieter, W. Menzel, S. Mueller, R. Jakoby
{"title":"Realization and characterization of a 77 GHz reconfigurable liquid crystal reflectarray","authors":"A. Moessinger, S. Dieter, W. Menzel, S. Mueller, R. Jakoby","doi":"10.1109/ANTEMURSI.2009.4805092","DOIUrl":"https://doi.org/10.1109/ANTEMURSI.2009.4805092","url":null,"abstract":"A tunable microstrip reflectarray with beam reconfiguration capability at 77 GHz is presented. Tunablility is achieved by using anisotropic liquid crystal as RF-substrate, tunable by a biasing voltage below 15V. The reflector has been characterized by utilizing a lens setup forming a gaussian beam. The reflector properties has been extracted in terms of its reflected phase and magnitude: While it is possible to tune about 280. of phase, the associated losses are still quite high. Nevertheless, pattern measurements of the reflectarray showed distinct beam collimation towards different angles when appropriate DC control voltages are applied.","PeriodicalId":190053,"journal":{"name":"2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting","volume":"31 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":"132161573","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: 14
Enhanced directivity of a tapered slot antenna for near-field imaging 用于近场成像的锥形缝隙天线的增强指向性
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.2009.4805047
J. Bourqui, M. Okoniewski, E. Fear
{"title":"Enhanced directivity of a tapered slot antenna for near-field imaging","authors":"J. Bourqui, M. Okoniewski, E. Fear","doi":"10.1109/ANTEMURSI.2009.4805047","DOIUrl":"https://doi.org/10.1109/ANTEMURSI.2009.4805047","url":null,"abstract":"This paper investigates the application of a novel feature called the “director” to a tapered slot antenna. This director, previously designed for a balanced antipodal Vivaldi antenna, consists of a profiled piece of higher dielectric introduced in the antenna aperture. Its effect is to increase the antenna directivity in the near-field by focusing the radiated energy in the end-fire direction. Simulated results show that the director may be highly beneficial for the tapered slot design.","PeriodicalId":190053,"journal":{"name":"2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting","volume":"10 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":"131312381","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: 8
Input impedance calculation of vertical wire antennas above lossy ground using matrix pencil method 用矩阵笔法计算有耗地面上垂直线天线的输入阻抗
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.2009.4805081
A. Khalatpour, Reza Saraf, G. Moradi
{"title":"Input impedance calculation of vertical wire antennas above lossy ground using matrix pencil method","authors":"A. Khalatpour, Reza Saraf, G. Moradi","doi":"10.1109/ANTEMURSI.2009.4805081","DOIUrl":"https://doi.org/10.1109/ANTEMURSI.2009.4805081","url":null,"abstract":"A method for evaluation of impedance and current distribution of vertical wire antennas above lossy ground is presented. Simulation is performed for several frequencies and the electrical parameter of soil. The results are compared with those of other methods showing the accuracy of our developed routine. In this paper we use Pocklington's integral equation and we use the method of moment to solve it. Reshaping the integral equation is done for easier computation. To evaluate the produced Sommerfeld integral we use suitable path and employ a new method that is called Matrix Pencil Method. Simple implementation by digital computer, fast and accurate simulation procedure and easy generalization for multilayer soil are the features of the proposed method..","PeriodicalId":190053,"journal":{"name":"2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting","volume":"194 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":"131580928","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 broadband transmitarray using double square ring elements 一种使用双方环形元件的宽带传输阵列
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.2009.4805107
C. G. Ryan, J. Bray, Y. Antar, M. R. Chaharmir, J. Shaker, A. Ittipiboon
{"title":"A broadband transmitarray using double square ring elements","authors":"C. G. Ryan, J. Bray, Y. Antar, M. R. Chaharmir, J. Shaker, A. Ittipiboon","doi":"10.1109/ANTEMURSI.2009.4805107","DOIUrl":"https://doi.org/10.1109/ANTEMURSI.2009.4805107","url":null,"abstract":"Dual-resonant double square ring elements are applied to the design of a four-layer transmitarray operating at 30 GHz. The design procedure is described and results of a 7.5% −1 dB gain bandwidth and 47% radiation efficiency are reported.","PeriodicalId":190053,"journal":{"name":"2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting","volume":"33 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":"114276964","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: 19
Modeling of active reconfigurable reflectarray elements 主动可重构反射元素的建模
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.2009.4805082
K. Kishor, S. Hum
{"title":"Modeling of active reconfigurable reflectarray elements","authors":"K. Kishor, S. Hum","doi":"10.1109/ANTEMURSI.2009.4805082","DOIUrl":"https://doi.org/10.1109/ANTEMURSI.2009.4805082","url":null,"abstract":"Reconfigurable reflectarrays based on elements incorporating gain have significant potential for realizing low-cost beamforming transmitters with high output powers. This paper considers cross-polarized antennas for realizing stable, phase-agile active reflectarray elements. A network model is derived that can be used to aid in the design of such cells. The model is shown to accurately predict the vector scattering response of a passive cross-polarized cell, compared to full-wave simulations. The integration of the cell with active devices is also discussed.","PeriodicalId":190053,"journal":{"name":"2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting","volume":"25 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":"115709302","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
Tunable hairpin resonator based on liquid crystal 基于液晶的可调谐发夹谐振器
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.2009.4805086
A. Mirfatah, J. Laurin
{"title":"Tunable hairpin resonator based on liquid crystal","authors":"A. Mirfatah, J. Laurin","doi":"10.1109/ANTEMURSI.2009.4805086","DOIUrl":"https://doi.org/10.1109/ANTEMURSI.2009.4805086","url":null,"abstract":"A novel tunable resonator with using liquid crystal as a dielectric is proposed. Due to the bias-dependent permittivity of an anisotropic nematic liquid crystal embedded in the resonator's multilayer substrate, a differential phase shift of 180° in the reflection coefficient is predicted in X band. The resonator was fabricated and the measured characteristics agree very well with the simulated data.","PeriodicalId":190053,"journal":{"name":"2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting","volume":"8 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":"117259629","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: 8
Biomedical microwave inversion in conducting cylinders of arbitrary shapes 任意形状导电圆柱体的生物医学微波反演
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.2009.4805094
P. Mojabi, C. Gilmore, A. Zakaria, J. Lovetri
{"title":"Biomedical microwave inversion in conducting cylinders of arbitrary shapes","authors":"P. Mojabi, C. Gilmore, A. Zakaria, J. Lovetri","doi":"10.1109/ANTEMURSI.2009.4805094","DOIUrl":"https://doi.org/10.1109/ANTEMURSI.2009.4805094","url":null,"abstract":"We introduce a non-linear inversion algorithm for use in microwave biomedical imaging when the object of interest is surrounded by an arbitrarily shaped conducting enclosure. The algorithm utilizes the Gauss-Newton inversion method and a combined additive and multiplicative regularizer. The conducting enclosure is taken into account via a FEM-based forward solver which is able to efficiently model arbitrarily shaped boundaries. Results for the 2D scalar case are given when the enclosure is a circle, triangle, and square, and include simple and complex biological scatterers, based on synthetic data. The results show that the algorithm is capable of reconstructing objects in all cylinder types.","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":"116075711","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
Development of composite radio telescope reflectors 复合射电望远镜反射器的研制
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.2009.4805054
D. Chalmers, G. Lacy, G. Hovey
{"title":"Development of composite radio telescope reflectors","authors":"D. Chalmers, G. Lacy, G. Hovey","doi":"10.1109/ANTEMURSI.2009.4805054","DOIUrl":"https://doi.org/10.1109/ANTEMURSI.2009.4805054","url":null,"abstract":"One of the keys to the success of the Square Kilometre Array (SKA) radio telescope will be the development of cost effective collecting area. Development of construction techniques for composite reflectors is an active R&D focus at the National Research Council's Dominion Radio Astronomical Observatory (DRAO), near Penticton, Canada. Composite materials offer a range of benefits over traditional metal structures in the construction of large (10m+ diameter) reflectors. The high specific modulus of composite materials results in the construction of lighter and stiffer reflectors and the low CTE of these materials yields thermally stable structures. New developments in composite manufacturing processes have the potential to make composites a cost effective alternative for reflector antennas. The team at DRAO constructed and tested its first 10-m diameter prototype reflector, the Mk1, in 2007, a second prototype, Mk2, incorporating improvements in performance and manufacturability was completed in the fall of 2008. This paper presents a review of the Mk1 measurement results and the preliminary measurements of the Mk2.","PeriodicalId":190053,"journal":{"name":"2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting","volume":"68 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":"123011264","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
Wireless powering of sensors in free space and concrete medium 自由空间和混凝土介质中传感器无线供电
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.2009.4805101
S. Punjala, K. Makki
{"title":"Wireless powering of sensors in free space and concrete medium","authors":"S. Punjala, K. Makki","doi":"10.1109/ANTEMURSI.2009.4805101","DOIUrl":"https://doi.org/10.1109/ANTEMURSI.2009.4805101","url":null,"abstract":"The whole idea of this paper is to power sensors buried inside concrete at a certain depth by using a reconfigurable PIFA antenna [2] and to power sensors in free space. The PIFA antenna inside concrete has to absorb power from the incident plane wave on the surface of concrete. Electric field which is incident on concrete would decay according to the parameters of concrete. The purpose of this paper is to show that an antenna with a fractal surface is an ideal choice to power a sensor inside concrete since the surface area is much larger. Any device in free space can by powered from the RF energy that its antenna receives from another antenna. Since the antenna [1] is large we can make sure that more than one sensor could be powered by a single antenna at a single time inside concrete. Antennas in free space are powered based on the electric field on its surface. Reconfigurable antennas can be used for powering sensors for transmission from inside the surface of concrete which would provide a lot of advantages. Concrete was modeled in HFSS according to the parameters in previous research papers [2].","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":"129000336","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
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