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Handbook of Reflector Antennas and Feed Systems Feed Systems

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ISBN-10: 1608075176

ISBN-13: 9781608075171

Edition: 2013

Authors: Lotfollah Shafai, Sudhaker Rao, Satish K. Sharma

List price: $219.00
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This is the first truly comprehensive and most up-to-date handbook available on modern reflector antennas and feed sources for diversified space and ground applications. There has never been such an all-encompassing reflector handbook in print, and no currently available title offers coverage of such recent research developments. The Handbook consists of three volumes. Volume 2 focuses on feed sources. Reflector antennas are extraordinary devices that combine high gain with geometrical simplicity, and can operate in broad frequency bands. Their performance, however, depends on the electrical characteristics of the feed system with which they operate. This comprehensive volume provides you…    
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Book details

List price: $219.00
Copyright year: 2013
Publisher: Artech House
Publication date: 6/30/2013
Binding: Hardcover
Pages: 450
Size: 7.50" wide x 10.25" long x 1.15" tall
Weight: 2.090
Language: English

The Feed System
Phase Center Determination
Feed Efficiency
Organization of the Book
Numerical Methods
Maxwell's Equations: Foundations of Electromagnetic Analysis
Green's Functions and Integral Representations
Method of Moments (MoM)
Integral Equation Formulation
Geometry Representations and Meshing
Basis Functions
Construction of the Impedance Matrix Equation
Direct and Iterative Solution Methods
Finite-Element Method (FEM)
Functional Formalism and Discrete Formulation
Material Modeling, Boundary Conditions, and Feed Modeling
Discretization and Basis Functions
Hybrid FE-BI and Domain Decomposition Techniques
Hybrid Finite-Element-Boundary Integral (FE-BI) Formulation
Fast Methods for Integral Equations
Fast Multipole Method (FMM)
Model Order Reduction for Fast Frequency Sweep
High-Frequency Techniques
Physical Optics (PO) and Geometrical Optics (GO)
Geometrical Theory of Diffraction and Uniform Theory of Diffraction
Electrically Small Feeds
Design Requirements
Waveguide Feeds
Small Waveguide Feeds
Small Coaxial Feeds
Small Wide Angle Feeds
Small Backfire Feeds
Microstrip Feeds
Single Patch Antenna as the Reflector Feed
Planar Antenna Array Feeds
Backfire Printed Dipole Feeds
Design Approach
Performance Results
Printed Dipole Performance with a Reflector
Asymmetric Feeds
Feed Pattern Shaping by Superstate Loading
Smooth Wall Multimode Horns for High Aperture Efficiency-Theory, Design, and Applications
Theory for High Aperture Efficiency
Circular Aperture
Realization of the Modes
Circular Horn Design
Three-Step Horn
Square High-Efficiency Horn
Multiflared High-Efficiency Horns
Other High-Efficiency Horn Structures
In Direct Radiating Arrays
In Multiple-Beam Reflectors
Profiled Horns and Feeds
Basis of Optimum Horns
Pattern Constraints
Input Mismatch
Aperture Efficiency
Phase Center Stability
Compactness and/or Physical Constraint Due to Existing Environment
Choice of Horn Profiles
Optimization of Horn Profile
Possible Approaches
Optimization Methods
Examples of Horn Designs
Corrugated Horn
Smooth-Walled Circular and Coaxial Horns
Rectangular Horn
Dielectric Rod and Horn
Arrays of Profiled Horns
Conclusion 151 References
Soft and Hard Horn Antennas
Introduction to Hybrid Mode Horn Antennas
Definition of Soft and Hard Surfaces
Soft and Hard Horn Designs and Implementations
Soft Corrugated Horns
Horns with a Dielectric Core (Dielcore Horns)
Soft Strip-Loaded Horns
Hard Strip-Loaded and Corrugated Horns
Metamaterial Horns (Meta-horns)
Hard Horns as Feeds for Array Antennas
Circularly Polarized Feed Antennas
Analysis Methods for CP Feed Antenna Design
Method of Moments (MoM)
Finite-Difference Time-Domain Method (FDTDM)
Polarizer and Two-Point Excitation Patch
One-Point Excitation CP Patch Feed Antenna
End-Fire Helical CP Feed Antenna
Effects of a Cavity
Frequency Response
CP Feed Array Antenna Composed of End-Fire Helical Elements
Conical Helical CP Feed Antennas
Back-Fire-Mode CP Helical Feed Antenna
Back-Fire Radiation
Frequency Response of the Current
Effects of Pitch Angle on the Frequency Response of the Antenna Characteristics
Spiral CP Feed Antenna
Curl CP Feed Antenna
CP Radiation
Frequency Response
Generalized Asymmetric Reflector Antenna Feeds for Polarization Control and Adaptive Virtual Array Design
Applications of Asymmetric Feeds
Cross Polarization Reduction in Offset Reflector Antennas
Asymmetric Feed Designs for Cross Polarization Reduction
Feed 1: Ring Choke Excited Circular Waveguide with Slot
Feed 2: Stepped Circular Waveguide with Tuning Blocks
Multiphase Center Reflector Antennas and Virtual Array Formation
The Concept Theory
Symmetrical-Cut Paraboloids
Adaptive Asymmetric Feed Designs for Multiphase Center Applications
Feed 3: Adaptive Dual-mode TE<sub>11</sub> and TE<sub>21</sub> Feed
Feed 4: Adaptive Dual-mode TE<sub>11</sub> and TM<sub>01</sub> Feed
Feed 5: Adaptive Triple-Mode TE<sub>11</sub> + TM<sub>01</sub> + TE<sub>21</sub> Feed
Concluding Remarks
Array Antennas and Low-Gain TT&C Antennas
Array Antennas
Array Design
Radiating Elements
Array Radiation Patterns
Low Gain TT&C Antennas
TT&C Subsystem and Antenna Applications
TT&C Antennas Introduction
TT&C RF Block Diagram and Link Budgets
Low-Gain TT&C Antennas
About the Editors