Journal ArticleDOI
Projection Matrix Method for Shaped Beam Synthesis in Phased Arrays and Reflectors
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In this article, a projection matrix method for shape beam synthesis in a general array of different size elements is presented, which relies on orthogonal projection of the desired far field intensity vector onto the space spanned by the far-field intensity vectors of the array elements.Abstract:
We present the projection matrix method for shaped beam synthesis in a general array of different size elements. The method relies on orthogonal projection of the desired far-field intensity vector onto the space spanned by the far-field intensity vectors of the array elements. It is found that for a uniform convergence of the solution, the far-field sample space must be extended beyond the coverage region; otherwise the projection matrix becomes ill conditioned. A general guideline for the far-field sample space is provided. The method, with necessary amendments, is then employed successfully for a reflector surface synthesis. The method is found to be several times faster than the gradient search method commonly used for beam synthesis. Numerical results for array and shaped reflector syntheses are shown and the advantages discussedread more
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Journal ArticleDOI
Reconfigurable Transmitarray Design Approaches for Beamforming Applications
J. Y. Lau,Sean V. Hum +1 more
TL;DR: The conclusion from investigations into these two approaches is that for general beamforming applications, the guided-wave approach is superior, achieving good bandwidth, scanning range, insertion loss, and small structure thickness, with only moderate fabrication complexity.
Journal ArticleDOI
An Effective Deterministic Procedure for the Synthesis of Shaped Beams by Means of Uniform-Amplitude Linear Sparse Arrays
TL;DR: In this article, a rigorous deterministic approach is proposed for the mask-constrained power pattern synthesis of shaped beams through one-dimensional sparse arrays having uniform-amplitude excitations (and variable phases).
Journal ArticleDOI
A Planar Reconfigurable Aperture With Lens and Reflectarray Modes of Operation
Jonathan Y. Lau,Sean V. Hum +1 more
TL;DR: Not only is this planar 6 × 6 fully reconfigurable array able to demonstrate full 2-D beamforming, it is also low-cost and easy to fabricate, making it very attractive for applications where high-gain beam-scanning is needed.
Introduction to Genetic Algorithms in Electromagnetics
Randy L. Haupt,Brian J. Barbisch,Douglas H. Werner,Pingjuan L. Werner,Dianel Erni,Dorthea Wiesmann,Michael Spühler,Stephan Hunziker,Esteban Moreno,Neil N. Jackson,Peter S. Excell,D.S. Linden,R. MacMillan,Sue Ellen Haupt,Luciano Tarricone,G. H. Smith,P. R. Williamson,K. Vozoff,Y. Ji,Hao Wang,Todd H. Hubing,F. Tiezzi,Alejandro Alvarez-Melcon,Juan R. Mosig +23 more
TL;DR: This article is a tutorial on using genetic algorithms to optimize antenna and scattering patterns, and provides a detailed explanation of how a genetic algorithm works, and a listing of a MATLAB code.
Journal ArticleDOI
A Frequency Agile Microstrip Patch Phased Array Antenna With Polarization Reconfiguration
TL;DR: In this article, a multifunctional $1 \times 4$ phased array antenna employing wideband frequency agile microstrip patches with simultaneous polarization reconfiguration has been designed and experimentally verified.
References
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Advanced Engineering Mathematics
TL;DR: This book discusses ODEs, Partial Differential Equations, Fourier Series, Integrals, and Transforms, and Numerics for ODE's and PDE's, as well as numerical analysis and potential theory, and more.
Journal ArticleDOI
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Ronald F. Barnes,Erwin Kreyszig +1 more
TL;DR: In this article, the authors present an approach for ODE's Phase Plane, Qualitative Methods, and Partial Differential Equations (PDE's) to solve ODE problems.
Journal ArticleDOI
Particle swarm optimization versus genetic algorithms for phased array synthesis
D.W. Boeringer,Douglas H. Werner +1 more
TL;DR: The particle swarm optimizer shares the ability of the genetic algorithm to handle arbitrary nonlinear cost functions, but with a much simpler implementation it clearly demonstrates good possibilities for widespread use in electromagnetic optimization.
Journal ArticleDOI
Genetic algorithms in engineering electromagnetics
J.M. Johnson,V. Rahmat-Samii +1 more
TL;DR: This paper presents a tutorial and overview of genetic algorithms for electromagnetic optimization, showing genetic-algorithm optimization to be suitable for optimizing a broad class of problems of interest to the electromagnetic community.
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