
Handbook of Reflector Antennas and Feed Systems Volume II
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Content
- Intro
- Handbook of Reflector Antennasand Feed Systems: Volume II Feed Systems
- Contents
- Preface
- Chapter 1 Introduction
- 1.1 Introduction
- 1.2 The Feed System
- 1.3 Phase Center Determination
- 1.4 Feed Efficiency
- 1.5 Organization of the Book
- References
- Chapter 2 Numerical Methods
- 2.1 Introduction
- 2.2 Maxwell's Equations: Foundations of Electromagnetic Analysis
- 2.2.1 Green's Functions and Integral Representations
- 2.3 Method of Moments (MoM)
- 2.3.1 Integral Equation Formulation
- 2.3.2 Geometry Representations and Meshing
- 2.3.3 Basis Functions
- 2.3.4 Construction of the Impedance Matrix Equation
- 2.3.5 Direct and Iterative Solution Methods
- 2.3.6 Examples
- 2.4 Finite-Element Method (FEM)
- 2.4.1 Functional Formalism and Discrete Formulation
- 2.4.2 Material Modeling, Boundary Conditions, and Feed Modeling
- 2.4.3 Discretization and Basis Functions
- 2.4.4 Example
- 2.5 Hybrid FE-BI and Domain Decomposition Techniques
- 2.5.1 Hybrid Finite-Element-Boundary Integral (FE-BI) Formulation
- 2.5.2 Example
- 2.6 Fast Methods for Integral Equations
- 2.6.1 Fast Multipole Method (FMM)
- 2.6.2 Examples
- 2.6.3 Model Order Reduction for Fast Frequency Sweep
- 2.6.4 Example
- 2.7 High-Frequency Techniques
- 2.7.1 Physical Optics (PO) and Geometrical Optics (GO)
- 2.7.2 Example
- 2.7.3 Geometrical Theory of Diffraction and Uniform Theory of Diffraction
- References
- Chapter 3 Electrically Small Feeds
- 3.1 Introduction
- 3.2 Design Requirements
- 3.3 Waveguide Feeds
- 3.3.1 Small Waveguide Feeds
- 3.3.2 Small Coaxial Feeds
- 3.3.3 Small Wide Angle Feeds
- 3.3.4 Small Backfire Feeds
- 3.4 Microstrip Feeds
- 3.4.1 Single Patch Antenna as the Reflector Feed
- 3.4.2 Planar Antenna Array Feeds
- 3.5 Backfire Printed Dipole Feeds
- 3.5.1 Design Approach
- 3.5.2 Performance Results
- 3.5.3 Printed Dipole Performance with a Reflector
- 3.6 Asymmetric Feeds
- 3.7 Feed Pattern Shaping by Superstrate Loading
- References
- Chapter 4 Smooth Wall Multimode Horns for High Aperture Efficiency-Theory, Design, and Applications
- 4.1 Introduction
- 4.2 Theory for High Aperture Efficiency
- 4.3 Circular Aperture
- 4.3.1 Realization of the Modes
- 4.3.2 Circular Horn Design
- 4.3.3 Three-Step Horn
- 4.4 Square High-Efficiency Horn
- 4.5 Multiflared High-Efficiency Horns
- 4.6 Other High-Efficiency Horn Structures
- 4.7 Applications
- 4.7.1 In Direct Radiating Arrays
- 4.7.2 In Multiple-Beam Reflectors
- 4.8 Conclusions
- References
- Chapter 5 Profiled Horns and Feeds
- 5.1 Introduction
- 5.2 Basis of Optimum Horns
- 5.2.1 Pattern Constraints
- 5.2.2 Input Mismatch
- 5.2.3 Aperture Efficiency
- 5.2.4 Phase Center Stability
- 5.2.5 Compactness and/or Physical Constraint Due to Existing Environment
- 5.3 Choice of Horn Profiles
- 5.4 Optimization of Horn Profile
- 5.4.1 Possible Approaches
- 5.4.2 Optimization Methods
- 5.5 Examples of Horn Designs
- 5.5.1 Corrugated Horn
- 5.5.2 Smooth-Walled Circular and Coaxial Horns
- 5.5.3 Rectangular Horn
- 5.5.4 Dielectric Rod and Horn
- 5.5.5 Arrays of Profiled Horns
- 5.6 Conclusion
- References
- Chapter 6 Soft and Hard Horn Antennas
- 6.1 Introduction to Hybrid Mode Horn Antennas
- 6.2 Definition of Soft and Hard Surfaces
- 6.3 Soft and Hard Horn Designs and Implementations
- 6.3.1 Soft Corrugated Horns
- 6.3.2 Horns with a Dielectric Core (Dielcore Horns)
- 6.3.3 Soft Strip-Loaded Horns
- 6.3.4 Hard Strip-Loaded and Corrugated Horns
- 6.3.5 Metamaterial Horns (Meta-horns)
- 6.4 Hard Horns as Feeds for Array Antennas
- 6.5 Conclusions
- References
- Chapter 7 Circularly Polarized Feed Antennas
- 7.1 Introduction
- 7.2 Analysis Methods for CP Feed Antenna Design
- 7.2.1 Method of Moments (MoM)
- 7.2.2 Finite-Difference Time-Domain Method (FDTDM)
- 7.3 Polarizer and Two-Point Excitation Patch
- 7.4 One-Point Excitation CP Patch Feed Antenna
- 7.5 End-Fire Helical CP Feed Antenna
- 7.5.1 Effects of a Cavity
- 7.5.2 Frequency Response
- 7.6 CP Feed Array Antenna Composed of End-Fire Helical Elements
- 7.7 Conical Helical CP Feed Antennas
- 7.8 Back-Fire-Mode CP Helical Feed Antenna
- 7.8.1 Back-Fire Radiation
- 7.8.2 Frequency Response of the Current
- 7.8.3 Effects of Pitch Angle on the Frequency Response of the Antenna Characteristics
- 7.9 Spiral CP Feed Antenna
- 7.10 Curl CP Feed Antenna
- 7.10.1 CP Radiation
- 7.10.2 Beamwidth
- 7.10.3 Frequency Response
- Acknowledgments
- References
- Chapter 8 Generalized Asymmetric Reflector Antenna Feeds for Polarization Control and Adaptive Virtual Array Design
- 8.1 Introduction
- 8.2 Applications of Asymmetric Feeds
- 8.2.1 Cross Polarization Reduction in Offset Reflector Antennas
- 8.3 Asymmetric Feed Designs for Cross Polarization Reduction
- 8.3.1 Feed 1: Ring Choke Excited Circular Waveguide with Slot [22, 23]
- 8.3.2 Feed 2: Stepped Circular Waveguide with Tuning Blocks [24]
- 8.4 Multiphase Center Reflector Antennas and Virtual Array Formation
- 8.4.1 The Concept Theory
- 8.4.2 Symmetrical-Cut Paraboloids [26]
- 8.4.3 Adaptive Asymmetric Feed Designs for Multiphase Center Applications
- 8.4.4 Feed 3: Adaptive Dual-mode TE11 and TE21 Feed [29]
- 8.4.5 Feed 4: Adaptive Dual-mode TE11 and TM01 Feed [30]
- 8.4.6 Feed 5: Adaptive Triple-Mode TE11 + TM01 + TE21 Feed [31]
- 8.5 Concluding Remarks
- References
- Chapter 9 Array Antennas and Low-Gain TT&C Antennas
- 9.1 Introduction
- 9.2 Array Antennas
- 9.2.1 Array Design
- 9.2.2 Radiating Elements
- 9.2.3 Array Radiation Patterns
- 9.3 Low Gain TT&C Antennas
- 9.3.1 TT&C Subsystem and Antenna Applications
- 9.3.2 TT&C Antennas Introduction
- 9.3.3 TT&C RF Block Diagram and Link Budgets
- 9.3.4 Low-Gain TT&C Antennas
- References
- About the Editors
- Index
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