Sparse Phased Array Antennas : Theory and Applications / Ashutosh Kedar.

Format:

Book

Author/Creator:

Kedar, Ashutosh, author.

Language:

English

Subjects (All):

Phased array antennas--Design.

Phased array antennas.

Antenna arrays.

Physical Description:

1 online resource (315 pages)

Edition:

First edition.

Place of Publication:

Boston : Artech House, [2022]

Summary:

This ground-breaking resource gives you the background theories and know-how you need to effectively design active phased array antennas with wider bandwidth and scan volume utilizing sparse array technology. The book shows you how to incorporate aperiodic arrays and sparse arrays as a solution for overcoming the restrictions faced in conventional phased antenna designs - such as blind spots, limited scan volume, large power and cooling requirements, RF path losses, and increased complexity - while adhering to the maintenance of SWAP-C resources widely used in aerospace and defence.Packed with step-by-step information and research results unavailable in any other single source to date, the book presents new concepts and techniques that potentially can be applied to many critical defense and commercial requirements such as: radars, satcom on move, sonars, weather monitoring, 5G and 6G for mobile communication, fault and crack detection in buildings and underground pipelines, automotive anti-collisions mechanism in automobiles, mine detection, through wall imaging, and more.The book helps you to understand the fundamental antenna technology being deployed in modern systems and equips you to design problem-solving sparse array models proven by electromagnetic simulations that can reduce the cost and overall complexity of the existing systems. Numerous design studies are documented to validate the theories presented. The book takes into account the functional constraints in designing commercial and military systems while demonstrating provable techniques that are practical and achievable.This is an important resource for phased array antenna designers interested in utilizing sparse array technology with wider bandwidth and scan volume. The book's straightforward approach and easy-to-follow language also make it accessible to students and those new to the field.

Contents:

Intro

Sparse Phased Array Antennas: Theory and Applications

Contents

Preface

PART I: Introduction

1 The Beginning

1.1 Introduction

1.2 Past and Present of Sparse Antenna Arrays

1.3 Advantages and Limitations of Sparse Array

1.4 Application Scenario for Sparse Array Antennas

1.5 Organization of the Book

References

PART II: Antenna and Antenna Arrays

2 Antenna Fundamentals

2.1 Introduction

2.2 Broad Classification of Antennas

2.4 Types of Antennas

2.5 Antenna Design Techniques

2.6 Field Regions

2.7 Antenna Measurements

2.8 Summary of the Chapter

3 Antenna Arrays

3.1 Introduction

3.2 Array Classification

3.3 Antenna Array Electromagnetics

3.3.1 Linear Antenna Array (LAA)

3.3.2 Planar Antenna Array (PAA)

3.4 Phased Array Antennas (PhAA)

3.4.1 Principle of Beam Steering

3.5 Antenna Array Design Constraints

3.5.1 Grating Lobes Mechanism

3.5.2 Mutual Coupling Phenomenon

3.5.3 Antenna Array Design Techniques

3.5.4 Practial Constraints in Regular or Dense Phased Array Antennas

PART III: Electromagnetics of Sparse Array Antennas

4 Generalized Expression for Directivity

4.1 Introduction

4.2 Generalized Exact Analytical Expression for Directivity

4.2.1 Case Studies

4.3 Approximate Expression for Directivity

4.4 Concentric Ring Antenna Arrays (CRAs)

4.4.1 Concentric Ring Sparse Array (CRSA)

4.4.2 Effect of Rotation on CRSA

4.5 Conclusions

APPENDIX 4A Derivation of (4.14)

APPENDIX 4B Derivation of (4.21)

5 Synthesis of Linear Sparse Array Antennas

5.1 Introduction

5.2 LAAs

5.2.1 A Brief History of the Synthesis of LSAAs

5.2.2 Sparse Versus Dense Linear Array Antennas

5.3 Numerical Studies on LSAAs

5.3.1 An LSAA with 60 Grid Locations (d = λ/2).

5.3.2 The Effect of Mutual Coupling and the Choice of the Array Element

5.3.3 The Relationship Between SLL and the Number of Elements

5.3.4 Relationship Between the Thinning Ratio (Fill Factor) and the Number of Elements

5.3.5 Scan Performance

5.4 ADT for the Synthesis of Nonuniform LSAA

5.4.1 Usage of ADT for the Array Synthesis

5.4.2 Numerical Case Studies

5.4.3 Oversized Linear Sparse Array Antennas

5.4.4 Highly Sparse Linear Antenna Array (dno = 1λ)

5.5 Synthesis of taylor-Like Distribution

5.5.1 Design and Optimization Philosophy

5.5.2 A 60-Element Linear Space Antenna Array (LSAA)

5.5.3 Optimization of a 60-Element LSAA

5.5.4 A 200-Element Linear Sparse Array Antenna (LSAA)

5.5.5 A 3,600 (60 × 60) Element Planar Sparse Array Antenna (PSAA)

5.6 Conclusions

6 Concentric Ring Sparse Array Antennas

6.1 Introduction

6.2 Review of the Literature

6.3 Types of Circular Sparse Arrays

6.3.1 The Array Factor of CRAs

6.4 Design Guildelines Framework

6.4.1 First Term in (6.14)

6.4.2 Maximum of AF

6.4.3 Second-Term in (6.14)

6.4.4 Simplified Version of (6.14)

6.4.5 Effects of Rotation

6.5 Design Process

6.6 Numerical Case Studies

6.6.1 A Three-Ring CRA

6.6.2 Benchmark Study of CRA with a Larger Aperture

6.7 Fractal Concentric Ring Circular Arrays

6.7.1 Cantor Fractal Set

6.8 Spiral Concentric Ring Circular Arrays

7 Planar Sparse Array Antennas

7.1 Introduction

7.2 Design Techniques for Sparse Antenna Arrays

7.3 Design Fundamentals

7.3.1 Mean or Average Distance and Projection Method

7.3.2 A Triangular Antenna Array

7.4 Array with Random Isotropic Element Allocation

7.5 Statistical Density Tapering (SDT) Method

7.6 Fractal Engineering Techiques.

7.7 Hybridization of Statistical Density Tapering and Genetric Algorithm Techniques

7.8 PT-Based Deterministic Design Methodology

7.8.1 Synthesis of the Spatial Tapering Across the Array Aperture

7.8.2 Synthesis of a Taylor-Like Distribution

7.8.3 Problem Statement

7.9 Conclusions

APPENDIX 7A Randomization Approach:Geolocating Method

8 Use Cases for Sparse Array Antennas

8.1 Introduction

8.2 Global Scenario on Sparse Array Antennas

8.3 Use Case Studies

8.3.1 A Stochastic Technique-Based Low SLL Sparse Array Antenna

8.3.2 Multifunctional Dual-Band Sparse Array Antenna

8.4 Conclusions

About the Author

Index.

Notes:

Includes bibliographical references and index.

Description based on publisher supplied metadata and other sources.

Description based on print version record.

Other Format:

Print version: Kedar, Ashutosh Sparse Phased Array Antennas: Theory and Applications

ISBN:

9781630818791

1630818798