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2007 International workshop on Antenna Technology: Small and Smart Antennas Metamaterials and Applications最新文献

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Reflection Properties of a planar structure combining AMC and PEC cells 结合AMC和PEC单元的平面结构的反射特性
2007 International workshop on Antenna Technology: Small and Smart Antennas Metamaterials and Applications Pub Date : 2007-03-21 DOI: 10.1109/IWAT.2007.370187
J. Iriarte, M. Paquay, I. Ederra, R. Gonzalo, P. de Maagt
{"title":"Reflection Properties of a planar structure combining AMC and PEC cells","authors":"J. Iriarte, M. Paquay, I. Ederra, R. Gonzalo, P. de Maagt","doi":"10.1109/IWAT.2007.370187","DOIUrl":"https://doi.org/10.1109/IWAT.2007.370187","url":null,"abstract":"In this paper a new structure which combines artificial magnetic conductor (AMC) and perfect electric conductor (PEC) cells to reduce the radar cross section (RCS) is presented. In the proposed structure AMC cells are filled with the so-called \"mushroom\" structure. AMC and metallic cells are combinated to create a 180deg of phase difference between the reflected waves in each cell, creating a destructive interference. Under normal incidence the reflected power in the scattered specular direction is minimized and the power is redirected in the phi = 45deg and 135deg planes at theta = 45deg direction. As a first step a theoretical model is presented based on array theory and finally the simulated results using the commercial software Ansoft HFSS are shown.","PeriodicalId":446281,"journal":{"name":"2007 International workshop on Antenna Technology: Small and Smart Antennas Metamaterials and Applications","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126729942","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 New Approach to the Design of Low Frequency Radar Absorbent Materials 低频雷达吸波材料设计的新途径
2007 International workshop on Antenna Technology: Small and Smart Antennas Metamaterials and Applications Pub Date : 2007-03-21 DOI: 10.1109/IWAT.2007.370147
K. L. Ford, B. Chambers
{"title":"A New Approach to the Design of Low Frequency Radar Absorbent Materials","authors":"K. L. Ford, B. Chambers","doi":"10.1109/IWAT.2007.370147","DOIUrl":"https://doi.org/10.1109/IWAT.2007.370147","url":null,"abstract":"This paper describes a new approach to improving the low frequency reflectivity performance of geometric transition radar absorbent materials through the use of impedance loading in the form of one or more FSS layers which are incorporated into the absorber base layer. The discussion includes theoretical predictions and measured data on unmodified and modified commercially available RAM which confirm the validity of the concept.","PeriodicalId":446281,"journal":{"name":"2007 International workshop on Antenna Technology: Small and Smart Antennas Metamaterials and Applications","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116398598","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
Use of Electric and Magnetic Conductors to Reduce the DRA Size 使用电和磁导体减小DRA尺寸
2007 International workshop on Antenna Technology: Small and Smart Antennas Metamaterials and Applications Pub Date : 2007-03-21 DOI: 10.1109/IWAT.2007.370098
A. Kishk, Wei Huang
{"title":"Use of Electric and Magnetic Conductors to Reduce the DRA Size","authors":"A. Kishk, Wei Huang","doi":"10.1109/IWAT.2007.370098","DOIUrl":"https://doi.org/10.1109/IWAT.2007.370098","url":null,"abstract":"A 75% size reduction of the dielectric resonator antenna (DRA) is achieved by incorporating the concept of electric conductor and magnetic conductor. To validate this concept, an infinite perfect electric conductor (PEC) and perfect magnetic conductors (PMC) planes with the presence of the source are used in an ideal situation. Then, a finite electric conductor and a high dielectric constant interface are applied to reduce the DRA size in a realistic situation. The antenna size is reduced while keeping the frequency band within the original frequency band of the full size case.","PeriodicalId":446281,"journal":{"name":"2007 International workshop on Antenna Technology: Small and Smart Antennas Metamaterials and Applications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129897909","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
Cross Fan-Shaped Antenna with a Stop-Band in the VSWR Frequency Response 在VSWR频率响应中带阻带的交叉扇形天线
2007 International workshop on Antenna Technology: Small and Smart Antennas Metamaterials and Applications Pub Date : 2007-03-21 DOI: 10.1109/IWAT.2007.370096
H. Nakano, K. Morishita, J. Yamauchi, M. Miyata
{"title":"Cross Fan-Shaped Antenna with a Stop-Band in the VSWR Frequency Response","authors":"H. Nakano, K. Morishita, J. Yamauchi, M. Miyata","doi":"10.1109/IWAT.2007.370096","DOIUrl":"https://doi.org/10.1109/IWAT.2007.370096","url":null,"abstract":"This paper presents a compound of two fan-shaped antenna (FASH) elements, where the elements intersect at a right angle. This is referred to as a \"cross fan-shaped antenna\" (CROFASH antenna). The CROFASH is designed with a stop-band (band of high VSWR) in the VSWR frequency response. This effectively blocks interference from extraneous signals with frequencies within the stop-band, such as those from a nearby communications system. The stop-band in this paper is realized using a wire and slits. The effects of the wire and slits on the VSWR and the radiation pattern are analyzed and discussed. The analysis is performed using the finite-difference time-domain method (FDTDM).","PeriodicalId":446281,"journal":{"name":"2007 International workshop on Antenna Technology: Small and Smart Antennas Metamaterials and Applications","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125415372","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
Broadband Wireless Access Base Station Performance using Smart Antenna Cell 使用智能天线单元的宽带无线接入基站性能
2007 International workshop on Antenna Technology: Small and Smart Antennas Metamaterials and Applications Pub Date : 2007-03-21 DOI: 10.1109/IWAT.2007.370148
A.I. Sotiriou, P. K. Varlamos, P. Trakadas, C. Capsalis
{"title":"Broadband Wireless Access Base Station Performance using Smart Antenna Cell","authors":"A.I. Sotiriou, P. K. Varlamos, P. Trakadas, C. Capsalis","doi":"10.1109/IWAT.2007.370148","DOIUrl":"https://doi.org/10.1109/IWAT.2007.370148","url":null,"abstract":"The benefits achieved by the deployment of a switched parasitic array (SPA) at a broadband wireless access (BWA) base station (BS) cell are presented. The antenna design methodology based on genetic algorithms and array designing rules are briefly analyzed. Antenna characteristics and geometry are also presented. Coverage simulation results, considering the proposed antenna system at a typical metropolitan environment, are reported.","PeriodicalId":446281,"journal":{"name":"2007 International workshop on Antenna Technology: Small and Smart Antennas Metamaterials and Applications","volume":"341 11","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120892247","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
Local Vortex Mode in Asymmetric Coupler Composed of Conventional Microstrip and Composite Right/Left-Handed Transmission Line with Lumped Elements 传统微带与集总元复合左右传输线组成的非对称耦合器的局部涡旋模式
2007 International workshop on Antenna Technology: Small and Smart Antennas Metamaterials and Applications Pub Date : 2007-03-21 DOI: 10.1109/IWAT.2007.370117
Yewen Zhang, Youzhen Wang, Fuqiang Liu, Hong-qiang Li, Hong Chen
{"title":"Local Vortex Mode in Asymmetric Coupler Composed of Conventional Microstrip and Composite Right/Left-Handed Transmission Line with Lumped Elements","authors":"Yewen Zhang, Youzhen Wang, Fuqiang Liu, Hong-qiang Li, Hong Chen","doi":"10.1109/IWAT.2007.370117","DOIUrl":"https://doi.org/10.1109/IWAT.2007.370117","url":null,"abstract":"In this paper, a local vortex model is proposed to study the coupling modes that occur at the interface between a right-handed transmission line (RH TL) and a composite right/left handed transmission line (CRLH TL). Based on this model, it is demonstrated that the propagation constants on the two lines are parallel, while the power in the two lines are antiparallel. Full-wave simulation and time-domain experimental results are presented and verify this vortex model","PeriodicalId":446281,"journal":{"name":"2007 International workshop on Antenna Technology: Small and Smart Antennas Metamaterials and Applications","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132169641","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
Low Profile Double Negative Lens Antenna 低轮廓双负透镜天线
2007 International workshop on Antenna Technology: Small and Smart Antennas Metamaterials and Applications Pub Date : 2007-03-21 DOI: 10.1109/IWAT.2007.370185
M. Neshat, D. Saeedkia, S. Safavi-Naeini
{"title":"Low Profile Double Negative Lens Antenna","authors":"M. Neshat, D. Saeedkia, S. Safavi-Naeini","doi":"10.1109/IWAT.2007.370185","DOIUrl":"https://doi.org/10.1109/IWAT.2007.370185","url":null,"abstract":"In this paper, we demonstrate full-wave electromagnetic analysis results to show that curved surface slabs constructed from double negative (DNG) metamaterials have much stronger focusing effect compared to the conventional materials. We take advantage of this property to design a DNG lens antenna with the focal length as short as one wavelength. The proposed DNG structure is attractive in designing low profile lens antennas for microwave and mm-wave applications.","PeriodicalId":446281,"journal":{"name":"2007 International workshop on Antenna Technology: Small and Smart Antennas Metamaterials and Applications","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122840311","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
Elliptical Antenna with Circular Cuts for UWB applications 用于超宽带应用的圆形切割椭圆天线
2007 International workshop on Antenna Technology: Small and Smart Antennas Metamaterials and Applications Pub Date : 2007-03-21 DOI: 10.1109/IWAT.2007.370172
B. Sanz-Izquierdo, Jiang Xu, J. Batchelor
{"title":"Elliptical Antenna with Circular Cuts for UWB applications","authors":"B. Sanz-Izquierdo, Jiang Xu, J. Batchelor","doi":"10.1109/IWAT.2007.370172","DOIUrl":"https://doi.org/10.1109/IWAT.2007.370172","url":null,"abstract":"A novel antenna structure for UWB applications is presented. The novel antenna is based on previous research work on two layer planar UWB antennas. The novel antenna uses a radiating structure in the same plane as the ground plane, while the stripline feed is extended within the centre layer. The stripline feed couples with the elliptical shaped structure with two circular cuts. The proposed antenna is smaller size than previously reported two layers structures. A 50 Omega shielded strip-line feed with a shielding array of metal vias is employed. The ultra-wideband antenna has monopole characteristics which are confirmed experimentally.","PeriodicalId":446281,"journal":{"name":"2007 International workshop on Antenna Technology: Small and Smart Antennas Metamaterials and Applications","volume":"27 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114115175","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
Steerable ultra-thin directive antenna from a metamaterial-based subwavelength cavity 基于超材料的亚波长腔体的可操纵超薄定向天线
2007 International workshop on Antenna Technology: Small and Smart Antennas Metamaterials and Applications Pub Date : 2007-03-21 DOI: 10.1109/IWAT.2007.370072
A. Ourir, S. Burokur, A. de Lustrac
{"title":"Steerable ultra-thin directive antenna from a metamaterial-based subwavelength cavity","authors":"A. Ourir, S. Burokur, A. de Lustrac","doi":"10.1109/IWAT.2007.370072","DOIUrl":"https://doi.org/10.1109/IWAT.2007.370072","url":null,"abstract":"We report the design of a steerable directive antenna using a resonant metamaterial-based subwavelength cavity. The cavity is made of a conventional ground plane and a composite metamaterial acting us a partially reflective surface. The antenna is a rectangular microstrip patch designed to operate near 10 GHz. The composite metamaterial is made of a variable capacitive grid and a constant inductive grid. Simulation and measurements show a deflection of the antenna beam of about plusmn20deg for a cavity of thickness about lambda/30.","PeriodicalId":446281,"journal":{"name":"2007 International workshop on Antenna Technology: Small and Smart Antennas Metamaterials and Applications","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121226111","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
Evaluation of the Impulse Response of an Ultra-Wide Band Antenna by Deconvolution Using the Method of Moments 用矩量法反卷积评价超宽带天线的脉冲响应
2007 International workshop on Antenna Technology: Small and Smart Antennas Metamaterials and Applications Pub Date : 2007-03-21 DOI: 10.1109/IWAT.2007.370126
R. Tamas, J. Chilo, P. Saguet
{"title":"Evaluation of the Impulse Response of an Ultra-Wide Band Antenna by Deconvolution Using the Method of Moments","authors":"R. Tamas, J. Chilo, P. Saguet","doi":"10.1109/IWAT.2007.370126","DOIUrl":"https://doi.org/10.1109/IWAT.2007.370126","url":null,"abstract":"The use of non-sinusoidal carriers in ultra-wide band communication systems requests a new regard on the parameters that characterize the antennas. Parameters and characteristics defined for a given frequency, like pattern diagram, gain, and input impedance, must be replaced by appropriate time-domain parameters, like impulse response, time-domain reflection coefficient, and time-domain gain. In this paper, we propose to use the method of moments to solve the linear equation of the convolution in the time-domain. The choice of the set of basis functions used to expand the unknown impulse response must take into account its distributional behavior. That leads to a good computing accuracy with relatively few functions","PeriodicalId":446281,"journal":{"name":"2007 International workshop on Antenna Technology: Small and Smart Antennas Metamaterials and Applications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115666046","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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