Genetic Algorithms in Electromagnetics: Genetic Algorithms in Electromagnetics.rar

Genetic Algorithms in Electromagnetics (Hardcover)by Randy L. Haupt (Author), Douglas H. Werner (Author)


Hardcover: 301 pages
Publisher: Wiley-IEEE Press (April 10, 2007)
Language: English
ISBN-10: 0471488895
ISBN-13: 978-0471488897
Product Dimensions: 9.3 x 6.1 x 0.8 inches

Review
"…a boon to senior and graduate engineering students who have to complete a design project." (CHOICE, September 2007)

"...a boon to senior and graduate engineering students who have to complete a design project." (CHOICE, September 2007)

Product Description
A thorough and insightful introduction to using genetic algorithms to optimize electromagnetic systems
Genetic Algorithms in Electromagnetics focuses on optimizing the objective function when a computer algorithm, analytical model, or experimental result describes the performance of an electromagnetic system. It offers expert guidance to optimizing electromagnetic systems using genetic algorithms (GA), which have proven to be tenacious in finding optimal results where traditional techniques fail. Genetic Algorithms in Electromagnetics begins with an introduction to optimization and several commonly used numerical optimization routines, and goes on to feature:

• Introductions to GA in both binary and continuous variable forms, complete with examples of MATLAB(r) commands
• Two step-by-step examples of optimizing antenna arrays as well as a comprehensive overview of applications of GA to antenna array design problems
• Coverage of GA as an adaptive algorithm, including adaptive and smart arrays as well as adaptive reflectors and crossed dipoles
• Explanations of the optimization of several different wire antennas, starting with the famous "crooked monopole"
• How to optimize horn, reflector, and microstrip patch antennas, which require significantly more computing power than wire antennas
• Coverage of GA optimization of scattering, including scattering from frequency selective surfaces and electromagnetic band gap materials
• Ideas on operator and parameter selection for a GA
• Detailed explanations of particle swarm optimization and multiple objective optimization
• An appendix of MATLAB code for experimentation

[ 本帖最后由 drjiachen 于 2008-12-15 11:13 编辑 ]

Contents
vii
Preface xi
Acknowledgments xiii
1. Introduction to Optimization in Electromagnetics 1
1.1 Optimizing a Function of One Variable / 2
1.1.1 Exhaustive Search / 5
1.1.2 Random Search / 5
1.1.3 Golden Search / 6
1.1.4 Newton’s Method / 7
1.1.5 Quadratic Interpolation / 9
1.2 Optimizing a Function of Multiple Variables / 10
1.2.1 Random Search / 11
1.2.2 Line Search / 13
1.2.3 Nelder–Mead Downhill Simplex Algorithm / 18
1.3 Comparing Local Numerical Optimization Algorithms / 21
1.4 Simulated Annealing / 24
1.5 Genetic Algorithm / 25
2. Anatomy of a Genetic Algorithm 29
2.1 Creating an Initial Population / 31
2.2 Evaluating Fitness / 32
2.3 Natural Selection / 34
2.4 Mate Selection / 35
viii CONTENTS
2.4.1 Roulette Wheel Selection / 35
2.4.2 Tournament Selection / 37
2.5 Generating Offspring / 37
2.6 Mutation / 42
2.7 Terminating the Run / 42
3. Step-by-Step Examples 45
3.1 Placing Nulls / 45
3.2 Thinned Arrays / 54
4. Optimizing Antenna Arrays 63
4.1 Optimizing Array Amplitude Tapers / 64
4.2 Optimizing Array Phase Tapers / 66
4.2.1 Optimum Quantized Low-Sidelobe Phase Tapers / 66
4.2.2 Phase-Only Array Synthesis Using Adaptive GAs / 69
4.3 Optimizing Arrays with Complex Weighting / 75
4.3.1 Shaped-Beam Synthesis / 75
4.3.2 Creating a Plane Wave in the Near Field / 78
4.4 Optimizing Array Element Spacing / 85
4.4.1 Thinned Arrays / 86
4.4.2 Interleaved Thinned Linear Arrays / 88
4.4.3 Array Element Perturbation / 92
4.4.4 Aperiodic Fractile Arrays / 98
4.4.5 Fractal–Random and Polyfractal Arrays / 101
4.4.6 Aperiodic Refl ectarrays / 105
4.5 Optimizing Conformal Arrays / 105
4.6 Optimizing Reconfi gurable Apertures / 112
4.6.1 Planar Reconfi gurable Cylindrical Wire Antenna
Design / 114
4.6.2 Planar Reconfi gurable Ribbon Antenna Design / 114
4.6.3 Design of Volumetric Reconfi gurable Antennas / 115
4.6.4 Simulation Results—Planar Reconfi gurable Cylindrical
Wire Antenna / 116
4.6.5 Simulation Results—Volumetric Reconfi gurable
Cylindrical Wire Antenna / 119
4.6.6 Simulation Results—Planar Reconfi gurable Ribbon
Antenna / 122
5. Smart Antennas Using a GA 133
5.1 Amplitude and Phase Adaptive Nulling / 136
5.2 Phase-Only Adaptive Nulling / 145
CONTENTS ix
5.3 Adaptive Refl ector / 148
5.4 Adaptive Crossed Dipoles / 160
6. Genetic Algorithm Optimization of Wire Antennas 169
6.1 Introduction / 169
6.2 GA Design of Electrically Loaded Wire Antennas / 169
6.3 GA Design of Three-Dimensional Crooked-Wire
Antennas / 179
6.4 GA Design of Planar Crooked-Wire and Meander-Line
Antennas / 184
6.5 GA Design of Yagi–Uda Antennas / 189
7. Optimization of Aperture Antennas 199
7.1 Refl ector Antennas / 199
7.2 Horn Antennas / 202
7.3 Microstrip Antennas / 205
8. Optimization of Scattering 217
8.1 Scattering from an Array of Strips / 218
8.2 Scattering from Frequency-Selective Surfaces / 223
8.2.1 Optimization of FSS Filters / 225
8.2.2 Optimization of Reconfi gurable FSSs / 233
8.2.3 Optimization of EBGs / 236
8.3 Scattering from Absorbers / 238
8.3.1 Conical or Wedge Absorber Optimization / 238
8.3.2 Multilayer Dielectric Broadband Absorber
Optimization / 241
8.3.3 Ultrathin Narrowband Absorber Optimization / 241
9. GA Extensions 251
9.1 Selecting Population Size and Mutation Rate / 251
9.2 Particle Swarm Optimization (PSO) / 255
9.3 Multiple-Objective Optimization / 257
9.3.1 Introduction / 257
9.3.2 Strength Pareto Evolutionary Algorithm—Strength
Value Calculation / 258
9.3.3 Strength Pareto Evolutionary Algorithm—Pareto Set
Clustering / 259
9.3.4 Strength Pareto Evolutionary Algorithm—
Implementation / 260
9.3.5 SPEA-Optimized Planar Arrays / 261
9.3.6 SPEA-Optimized Planar Polyfractal Arrays / 264
x CONTENTS
Appendix: MATLAB® Code 269
Bibliography 277
Index 299

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Genetic Algorithms in Electromagnetics

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[ 本帖最后由 lymhit 于 2009-3-27 09:15 编辑 ]

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Genetic Algorithms in Electromagnetics

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Genetic Algorithms in Electromagnetics

Genetic Algorithms in Electromagnetics

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Adaptive Crossed Dipoles

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感谢楼主分享