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Novel approach for the computation of the EFIE with a low computational cost [antenna radiation patterns]

Novel approach for the computation of the EFIE with a low co...

引用

Antennas and Propagation Society International Symposium

作者： E. Garcia F. Saez de Adana J.M. Gomez M.F. Catedra Department Teoria de la Senal y Comunicaciones Escuela Poliéicnica. Universidod de AIcolà Madrid Spain Dept. Téoria de la Señal y Comunicaciones Universidad de Alcalá Madrid Spain

An efficient numerical solution for predicting radiation patterns of on-board antennas is presented. The approach is based on the method of moments (MoM). A novel technique of operator calculation is used to avoid mem... 详细信息

关键词： Computational efficiency message-oriented middleware Magnetic moments Moment methods Antenna radiation patterns Integral equations Ear Conductors Testing Blades

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Efficient full-wave analysis of packaging interconnects with bends using the method of moments

Efficient full-wave analysis of packaging interconnects with...

引用

IEEE Topical Meeting on Electrical Performance of Electronic Packaging (EPEPS)

作者： Zhaohui Zhu S.L. Dvorak J.L. Prince Center for Electronic Packaging ResearchElectrical and Computer Engineering Department University of Arizona Tucson Tucson AZ USA

In this paper, a method of moments (MoM) based, full-wave layered interconnect simulator, UA-FWLIS is extended to handle interconnects with bends. The accuracy of this new bend-cell expansion function is investigated ... 详细信息

关键词： Packaging Moment methods Integrated circuit interconnections Integral equations Computational modeling message-oriented middleware Transmission line matrix methods Fourier transforms Stripline Testing

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Matrix compression and supercompression techniques for large arrays

Matrix compression and supercompression techniques for large...

引用

Antennas and Propagation Society International Symposium

作者： S. Maci G. Vecchi A. Freni Dept. of Information Engineering University of Siena Italy Dept. of Electronics Abruzzi Italy Dept.of Electronics and Telecomm University of Florence Italy

ISBN: (纸本)0780378466;0852967527

This paper deals with design-oriented analysis based on matrix compression techniques for large array antennas. We will consider arrays with planar radiating elements metalized on dielectric stratification ("printed" arrays of patches, slots, etc.), or made of non-planar conductors in air (with or without backplane), as well as waveguide-based aperture arrays. Reflectarrays, though not explicitly mentioned, are typical applications for both classes.

关键词： Frequency Apertures message-oriented middleware Linear systems Geometry Feeds Magnetic analysis Green's function methods

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A novel technique for analysis of finite and infinite array antennas

A novel technique for analysis of finite and infinite array ...

引用

Antennas and Propagation Society International Symposium

作者： A. Fard A. Tavakoli R.F. Dana Electrical Engineering Department Amirkabir University of Technology슠 Tehran Iran Faculty of Engineering University of Tehran Tehran Iran

The SEMN (surface equivalence principle and multiport network theory) method is potentially able to analyze arbitrary shaped microstrip antennas. Large structures and arrays cannot be analyzed by the time-consuming SEMN method. Here, two techniques are applied to improve computational efficiency, without accuracy and functionality loss. The modified method is applied to a four-element microstrip array and the results are compared with measurements, In addition, double Shank's method, a numerical technique to speed up the convergence rate of the series is used to study an infinite periodic microstrip array. The results of an infinite probe-fed periodic microstrip array antenna are compared with the MOM solution. Excellent agreement is observed for both finite and infinite arrays.

关键词： Antenna arrays Microstrip antenna arrays Microstrip antennas Phased arrays message-oriented middleware Antenna theory Magnetic separation Equations Computational efficiency Antenna measurements

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Analysis and design of dual reflector antennas for omnidirectional coverage

Analysis and design of dual reflector antennas for omnidirec...

引用

Antennas and Propagation Society International Symposium

作者： J.R. Bergmann F.J.V. Hasselmann CETUC-Center for Telecomunications Studies of the Catholic University Rio de Janeiro Brazil

Radio base stations for point to multipoint communications can use a compact configuration employing a single circularly symmetrical shaped reflector surface fed by a coaxial conical horn, producing cosecant squared-like power patterns in the vertical plane to account for free space attenuation, while concentrating radiated energy below the horizon line for reduced interference. A dual reflector arrangement, showing good potential for larger bandwidth applications and being particularly interesting for systems operating at higher frequencies, e.g. millimeter waves, has been suggested. This paper, using the MoM analysis tool for both reflector and feed structures, explores this configuration with two case studies.

关键词： Reflector antennas Antenna feeds Coaxial components Frequency Horn antennas Antennas and propagation Apertures message-oriented middleware Magnetic analysis Coaxial cables

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A microstrip antenna element for satellite communication

A microstrip antenna element for satellite communication

引用

International Symposium on Antennas, Propagation and EM Theory (ISAPE)

作者： Zheng Qiurong Lu Wanzheng Liu Feng The Telecommunication Engineering Institute of the Air Force Engineering University Xi'an China

This paper gives a detailed analysis on the impedance and radiating characteristics of a micro-strip patch antenna by computer simulation. Some relationships between its size and characteristic parameters have been found. A new structure of micro-strip antenna is presented based on the analysis, which can be used in VSAT station and satisfied with the following requirement of C-band satellite communication: dual-frequency, wide-band, dual-polarization and isolation. The result gives a good accordance with the conclusion presented in the simulation.

关键词： Microstrip antennas Satellite antennas Satellite communication Frequency Broadband antennas Polarization Bandwidth Microwave antennas Costs message-oriented middleware

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A BMIA/AIM multi-resolution approach for the analysis of large printed array

A BMIA/AIM multi-resolution approach for the analysis of lar...

引用

Antennas and Propagation Society International Symposium

作者： P. De Vita A. Mori A. Freni F. Vipiana P. Pirinoli G. Vecchi Department of Electronics and Telecommunications University of Florence Florence Italy Department of Electronics Polytechnic of Turin Turin Italy

An efficient technique is presented, based on the application of a multi-resolution (MR) approach to the BMIA/AIM formulation. The BMIA/AIM is an extension of the banded matrix iterative approach (BMIA) to a non-canonical grid by using the adaptive integral method (AIM) and allows an efficient analysis of patch antennas having medium/large or large dimensions. The multi-resolution (MR) approach keeps the different scales of the problem directly into the basis functions representation. The basis is constructed via the "dual-isoscalar" technique, which possesses both spectral and spatial resolution, and allows us to considerably improve the MoM matrix condition number and iteration convergence.

关键词： Multiresolution analysis Iterative methods Spatial resolution message-oriented middleware Patch antennas Convergence Mesh generation Rough surfaces Surface roughness Scattering

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Helical antenna analysis using curved segment mom

Helical antenna analysis using curved segment mom

引用

IEEE International Symposium on Electromagnetic Compatibility (EMC)

作者： A. Selcuk B. Saka Department of Electrical Electronics Engineering Hacettepe University Ankara Turkey

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A spiral antenna with a circular reflector

A spiral antenna with a circular reflector

引用

International Symposium on Antennas, Propagation and EM Theory (ISAPE)

作者： Xiaomiao Zhang Zehong Yan Wenyan Wei Yanping Li Yongkang Shi Institute of Antemias and EM Scattering Xidian University Xi'an China

A numerical solution for a spiral antenna with a finite reflector is presented. The analysis is based on the method of moments (MoM) and Galerkin's matching. The antenna geometric parameters are optimized to obtain the best circular polarization (CP) axial ratios (AR) in the main beam of the pattern. A block matrix inversion technique is used for the computation to be more efficient. Simulated results are well consistent with the measured ones, while the antenna height is less than a quarter of wavelength.

关键词： Spirals Reflector antennas message-oriented middleware Moment methods Computational modeling Equations Transmission line matrix methods Antenna measurements Wavelength measurement Bandwidth

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Multiresolution techniques in the moment method solution to integral equations arising in electromagnetic problems

Multiresolution techniques in the moment method solution to ...

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IEEE Topical Conference on Wireless Communication Technology

作者： Mook-Seng Leong Ban-Leong Ooi Shih-Nern Wong National University of Singapore Singapore

ISBN: (纸本)0780381963

We discuss the use of wavelets in the method of moments solution to integral equations arising in two typical electromagnetic problems. In the first problem, we analyse the arbitrarily shaped patch antenna with resistive wall boundary, formulated as a boundary element method problem using a contour integral. In the second problem, three-dimensional electromagnetic scattering from a large flat conducting plate is studied. The problem is formulated as an EFIE and discretized with Rao-Wilton-Glisson (RWG) vector basis functions.

关键词： Moment methods Integral equations Electromagnetic scattering Sparse matrices message-oriented middleware Impedance Multiresolution analysis Wavelet analysis Supercomputers Computational complexity

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