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2007 Loughborough Antennas and Propagation Conference最新文献

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Input Impedance of Planar FP and EBG Antennas 平面FP和EBG天线的输入阻抗
2007 Loughborough Antennas and Propagation Conference Pub Date : 2007-04-02 DOI: 10.1109/LAPC.2007.367485
T. Vu, K. Mahdjoubi, S. Collardey, A. Tarot
{"title":"Input Impedance of Planar FP and EBG Antennas","authors":"T. Vu, K. Mahdjoubi, S. Collardey, A. Tarot","doi":"10.1109/LAPC.2007.367485","DOIUrl":"https://doi.org/10.1109/LAPC.2007.367485","url":null,"abstract":"The theoretical study of the input impedance for Fabry-Perot (FP), electromagnetic band gap (EBG) or leaky wave (LW) antennas is a real challenge from mathematical and electromagnetic modelling point of view and is very rarely addressed in the literature. In this paper, an original method will be presented to evaluate the input impedance of the EBG antennas excited by a line source or a point source. The method is based on the generalisation of the plane wave expansion of the antenna internal fields to cylindrical or spherical wave expansions. This procedure leads to simple and rigorous formulas which are very helpful for designing the EBG, FP and LW antennas and for understanding their electromagnetic behaviours.","PeriodicalId":349412,"journal":{"name":"2007 Loughborough Antennas and Propagation Conference","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123506181","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
Analysis of Microstrip Fractal Antennas By Means of RWG MOM and Wavelet Transformation 用RWG - MOM和小波变换分析微带分形天线
2007 Loughborough Antennas and Propagation Conference Pub Date : 2007-04-02 DOI: 10.1109/LAPC.2007.367462
M. Rahmani, A. Tavakoli, H. Amindavar, A. Moghaddamjoo
{"title":"Analysis of Microstrip Fractal Antennas By Means of RWG MOM and Wavelet Transformation","authors":"M. Rahmani, A. Tavakoli, H. Amindavar, A. Moghaddamjoo","doi":"10.1109/LAPC.2007.367462","DOIUrl":"https://doi.org/10.1109/LAPC.2007.367462","url":null,"abstract":"In this paper, we analyze a microstrip fractal antenna using RWG (Rao, Wilton, Glisson) moment method that models the microstrip antenna by planar triangular surface patches and then solves the resultant electric field integral equation (EFIE). Wavelet transform with orthogonal basis function is applied to the extremely dense impedance matrix to reach a relatively sparse structure indicating the dominant surface currents. The optimum sparsity is reached by taking advantage of the resemblance between the basis theory of wavelet and the iterated function system (IFS) that generates the fractal structure. The input impedance and the radiation pattern of a microstrip Sierpinski Carpet fractal antenna is presented using the aforementioned method.","PeriodicalId":349412,"journal":{"name":"2007 Loughborough Antennas and Propagation Conference","volume":"105 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124889139","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
Application of Wire Media Layers for Coupling Reduction in Antenna Arrays and Microwave Devices 线介质层在天线阵列和微波器件耦合降低中的应用
2007 Loughborough Antennas and Propagation Conference Pub Date : 2007-04-02 DOI: 10.1109/LAPC.2007.367428
I. Nefedov, S. Tretyakov, J. Saily, Xu Liangge, T. Mynttinen
{"title":"Application of Wire Media Layers for Coupling Reduction in Antenna Arrays and Microwave Devices","authors":"I. Nefedov, S. Tretyakov, J. Saily, Xu Liangge, T. Mynttinen","doi":"10.1109/LAPC.2007.367428","DOIUrl":"https://doi.org/10.1109/LAPC.2007.367428","url":null,"abstract":"Application of wire media for reduction of a mutual coupling of radiating elements is considered. We present a design, which allows for simultaneous decoupling for TM and TE polarizations. We show that the mutual coupling can be reduced by 20 dB for TM polarization and by 7-8 dB for TE polarization. Theoretical estimations are supported with experimental results.","PeriodicalId":349412,"journal":{"name":"2007 Loughborough Antennas and Propagation Conference","volume":"61 34","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114052888","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
Mushroom-Like High-Impedance Surface (HIS) with Slanted VIAS 带有倾斜过孔的蘑菇状高阻抗表面
2007 Loughborough Antennas and Propagation Conference Pub Date : 2007-04-02 DOI: 10.1109/LAPC.2007.367491
S. Tse, Y. Hao, C. Parini
{"title":"Mushroom-Like High-Impedance Surface (HIS) with Slanted VIAS","authors":"S. Tse, Y. Hao, C. Parini","doi":"10.1109/LAPC.2007.367491","DOIUrl":"https://doi.org/10.1109/LAPC.2007.367491","url":null,"abstract":"This paper presents a new high-impedance surface with slanted vias. The vias used in conventional mushroom like structures are made slanted at an angle from the center of each patch and connecting to the ground plane. Numerical simulation on reflection phase response indicates that there is a dual band frequency of operation compared with that from the conventional mushroom structures with vertical vias. Furthermore, the slanted via can be made offset along one axis which helps to tune the separation of the two resonances.","PeriodicalId":349412,"journal":{"name":"2007 Loughborough Antennas and Propagation Conference","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114365747","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
Slit-Slot Loaded Parallel Coupled-Line Filter 狭缝加载并联耦合线滤波器
2007 Loughborough Antennas and Propagation Conference Pub Date : 2007-04-02 DOI: 10.1109/LAPC.2007.367477
J. Kelly, R. Seager
{"title":"Slit-Slot Loaded Parallel Coupled-Line Filter","authors":"J. Kelly, R. Seager","doi":"10.1109/LAPC.2007.367477","DOIUrl":"https://doi.org/10.1109/LAPC.2007.367477","url":null,"abstract":"The miniaturisation of microstrip circuits is very important for systems that must be light weight and/or compact. Examples of such systems include high temperature superconducting (HTS) filters as well as those within satellite, aerospace, and portable devices. Inter-digital and parallel-coupled resonators are amongst the most commonly used forms of coupled line circuit, for filtering applications. The parallel-coupled line filter was proposed by Cohn in 1958. It has remained popular ever since, due in part to its: (1) ability to realise a wide range of bandwidths, (2) insensitivity to fabrication tolerances, and (3) simplicity of design. Unfortunately half-wavelength resonators are excessively long, at low microwave frequencies. Furthermore filters based on half-wavelength resonators exhibit a spurious pass-band at twice the fundamental frequency. This is caused by dispersion resulting from the unequal even and odd mode phase velocities. For these reasons there have been sustained research efforts to address both size and spurious pass-band limitations. One of the techniques for suppressing spurious harmonics involves cutting grooves along the edges of each coupled line. The new filter, presented in this paper, utilises a periodic loading comprising a combination of a slot and groove. This technique also gives the ability to tune the centre frequency of the filter.","PeriodicalId":349412,"journal":{"name":"2007 Loughborough Antennas and Propagation Conference","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122310624","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
Electrically Small Antennas with Dielectric, Magneto-Dielectric and Metamaterial Loading 电介质、磁介质和超材料负载的小型电天线
2007 Loughborough Antennas and Propagation Conference Pub Date : 2007-04-02 DOI: 10.1109/LAPC.2007.367431
Y. Hao, Y. Zhao, Y. Lee, I. Youngs
{"title":"Electrically Small Antennas with Dielectric, Magneto-Dielectric and Metamaterial Loading","authors":"Y. Hao, Y. Zhao, Y. Lee, I. Youngs","doi":"10.1109/LAPC.2007.367431","DOIUrl":"https://doi.org/10.1109/LAPC.2007.367431","url":null,"abstract":"With recent advances in manufacture and study of high dielectric ceramics, magneto-dielectrics and metamaterials, there have been renewed interests in studying electrically small antennas. Prospective features of aforementioned loading schemes have been discussed by various research groups, however, there lacks of a fair comparison in antenna performance taking into consideration of material dispersion and losses. This paper presents a comparative study on antenna performance, in particular, the beam pattern, gain, efficiency and bandwidth of three types of material/metamaterial loaded antennas as a function of physical size, electrical size and frequency. Selected antennas are built and tested, measurement results are in good agreement with theoretical predictions.","PeriodicalId":349412,"journal":{"name":"2007 Loughborough Antennas and Propagation Conference","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123029987","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
Textured Surface Slot Antenna 纹理表面槽天线
2007 Loughborough Antennas and Propagation Conference Pub Date : 2007-04-02 DOI: 10.1109/LAPC.2007.367434
S. Simms, V. Fusco
{"title":"Textured Surface Slot Antenna","authors":"S. Simms, V. Fusco","doi":"10.1109/LAPC.2007.367434","DOIUrl":"https://doi.org/10.1109/LAPC.2007.367434","url":null,"abstract":"In this paper, we provide numerical and experimental verification of the size reduction and polar pattern modification that can be achieved by using a slot excited textured surface antenna as compared to a conventional slot antenna constructed from a flat perfectly conducting metal sheet, PEC. Excitation is provided via a coaxial conductor positioned between a slot etched into the untextured, i.e. PEC ground plane side of the antenna, with the upper surface of the structure textured. We show that a size reduction of 48% and a gain improvement of nearly 9 dBi can be achieved in comparison to a conventional slot antenna.","PeriodicalId":349412,"journal":{"name":"2007 Loughborough Antennas and Propagation Conference","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126548297","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
Conformable and Controllable Radome in X Band using Electromagnetic Band Gap Material 基于电磁带隙材料的X波段兼容可控天线罩
2007 Loughborough Antennas and Propagation Conference Pub Date : 2007-04-02 DOI: 10.1109/LAPC.2007.367490
S. Haché, S. Burokur, F. Gadot, G. Piau, A. de Lustrac
{"title":"Conformable and Controllable Radome in X Band using Electromagnetic Band Gap Material","authors":"S. Haché, S. Burokur, F. Gadot, G. Piau, A. de Lustrac","doi":"10.1109/LAPC.2007.367490","DOIUrl":"https://doi.org/10.1109/LAPC.2007.367490","url":null,"abstract":"We report the study of the design and the simulation of a conformable and switchable radome in X band (around 10 GHz) based on a controllable electromagnetic band gap material (CEBG) [1-4]. This material consists of parallel periodic metallic wires forming a grid. The introduction of active electronic elements such as PIN diodes or photoconductors, allows the commutation between the electric state of continuous wires and the state of discontinuous ones. We switch from the forbidden gap of an EBG material made of the continuous metallic wires lattice to the forbidden band of the periodic discontinuous wires one, according to the voltage or the light intensity. This structure must present a commutation around 10 GHz and finds various applications in the aeronautic field.","PeriodicalId":349412,"journal":{"name":"2007 Loughborough Antennas and Propagation Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129219303","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
Characteristic of UWB Pulse over Powerline Communication 超宽带脉冲电力线通信特性研究
2007 Loughborough Antennas and Propagation Conference Pub Date : 2007-04-02 DOI: 10.1109/LAPC.2007.367481
Shuxian Chen, C. C. Chiau, Xiao-dong Chen, C. Parini
{"title":"Characteristic of UWB Pulse over Powerline Communication","authors":"Shuxian Chen, C. C. Chiau, Xiao-dong Chen, C. Parini","doi":"10.1109/LAPC.2007.367481","DOIUrl":"https://doi.org/10.1109/LAPC.2007.367481","url":null,"abstract":"Recently, the broadband powerline communications (BPLC) has attracted more attention in communication technology. This is because it is a very cost effective way to transmit high data rate services by re-using in-building powerline cables. However, the current BPLC is bandwidth limited as the current research only consider the communication signals of frequency up to 30 MHz. This paper presents a new study to transmit UWB pulse over the powerline communications. The characteristics of UWB pulse over powerline is modelled using finite integration technique simulation.","PeriodicalId":349412,"journal":{"name":"2007 Loughborough Antennas and Propagation Conference","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127870947","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
Low Profile Multi-Frequency Dipole Antenna Array Based on Planar Meta-Surfaces 基于平面元曲面的低轮廓多频偶极子天线阵列
2007 Loughborough Antennas and Propagation Conference Pub Date : 2007-04-02 DOI: 10.1109/LAPC.2007.367444
E. Sáenz, P. Ikonen, R. Gonzalc, I. EderraWinig, S. Tretyakov, P. D. de Maagt
{"title":"Low Profile Multi-Frequency Dipole Antenna Array Based on Planar Meta-Surfaces","authors":"E. Sáenz, P. Ikonen, R. Gonzalc, I. EderraWinig, S. Tretyakov, P. D. de Maagt","doi":"10.1109/LAPC.2007.367444","DOIUrl":"https://doi.org/10.1109/LAPC.2007.367444","url":null,"abstract":"In this paper, the radiation performance of a low profile multi-frequency dipole antenna array with a planar meta-surface is presented. The meta-surface consists of two closely located parallel grids of short dipoles and one grid of continuous wires in between. By tuning a dipole to the pass band of the superstrate and due to the magnetic dipole moments induced in the unit cells, a uniform illumination is achieved and therefore an enhancement of the directivity. Placing a second meta-surface under the dipole with the stop-band tuned to the working frequency, the back radiation is reduced. By combining low and high resonant-frequency unit cells and tuning dipoles to these frequencies, a double-frequency array is formed.","PeriodicalId":349412,"journal":{"name":"2007 Loughborough Antennas and Propagation Conference","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-04-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115902663","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
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