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FREQUENCY SELECTIVE SURFACES; CONTENTS; Foreword I; Foreword II; Preface; Acknowledgments; Symbols and Definitions; 1 General Overview; 1.1 What is a Periodic Surface?; 1.2 Passive Versus Active Arrays; 1.3 Dipole Versus Slot Arrays; 1.4 Complementary Arrays; 1.5 A Little History with Physical Insight; 1.6 How Do We "Shape" the Resonant Curve?; 1.6.1 Cascading Periodic Surfaces without Dielectrics; 1.6.2 Single Periodic Surface with Dielectric Slabs; 1.6.3 Real Hybrid Periodic Structures; 1.7 Application of Periodic Structures; 1.7.1 Hybrid Radomes; 1.7.2 Band-Stop Filters |
1.7.3 Dichroic Subreflectors1.7.4 Dichroic Main Reflectors; 1.7.5 Circuit Analog Absorbers; 1.7.6 Meanderline Polarizers; 1.8 Common Misconceptions; 1.9 Grating Lobes; 1.10 Problems; 2 Element Types: A Comparison; 2.1 Introduction; 2.2 Group 1: Center Connected or N-Poles; 2.2.1 "Gangbuster" Surface; 2.2.2 Unloaded Tripole Array; 2.2.3 Anchor Element; 2.2.4 Jerusalem Cross; 2.2.5 Square Spiral Element; 2.3 Group 2: Loop Types; 2.3.1 Four-legged Loaded Element; 2.3.2 Three-legged Loaded Element; 2.3.3 Hexagon Element; 2.4 Group 3: Solid Interior Types; 2.5 Group 4: Combination Elements |
2.6 Some Common Misconceptions About Elements2.6.1 Array versus Element Effect; 2.6.2 Bandwidth versus Width of the Elements; 2.7 Comparison of Elements; 2.8 Problems; 3 Evaluating Periodic Structures: An Overview; 3.1 Introduction; 3.2 Single Infinite Case; 3.3 Double Infinite Case; 3.4 Example; 3.5 Common Misconceptions; 3.6 Summary of Our Computational Approach; 3.7 Problems; 4 Spectral Expansion of One- and Two-Dimensional Periodic Structures; 4.1 Introduction; 4.2 The Vector Potential dAq from a Single Infinite Column Array of Hertzian Elements with Arbitrary Orientation p |
4.3 Vector Potential dA for a Double Infinite Array of Hertzian Elements with Arbitrary Orientation p4.3.1 Rectangular Grid; 4.3.2 Skewed Grid; 4.4 Vector Fields dH(R) and dE(R) for a Double Infinite Array of Hertzian Elements with Arbitrary Orientation p; 4.5 Vector Field E(R) for a Double Infinite Array of Elements with Given Current Distribution I(l) and Arbitrary Orientation p; 4.6 Physical Interpretation; 4.7 Induced Voltages in a Linear Antenna; 4.7.1 By a Single Plane Wave; 4.7.2 By a Plane Wave Spectrum; 4.8 More Physical Insight; 4.8.1 Real Space: ry Positive Real |
4.8.2 Imaginary Space: ry Negative Imaginary4.9 Region; 4.10 Self-Impedance of a Single Element and of Arrays; 4.11 Examples; 4.1 1.1 Example I: Scattering from an Array of z-Directed Elements; 4.11.2 Example II: Investigation of RA; 4.1 1.3 Example III: Variation of l with Scan Angle; 4.1 1.4 Example IV Scan Impedance ZA as a Function of Scan Angle; Surface Waves; 4.12 Planar Elements of Arbitrary Shape; 4.12.1 Total Radiated Field from an Array with Segmented Elements; 4.12.2 Induced Voltage in a Segmented Element; 4.12.3 Mutual Impedance Z1',1 for Arrays with Segmented Elements |
4.13 Common Misconceptions |