Debatosh Guha, Chandrakanta Kumar, Sujoy Biswas

Defected Ground Structure (Dgs) Based Antennas

Design Physics, Engineering, and Applications

• Gebundenes Buch

Produktbeschreibung

Defected Ground Structure (DGS) Based Antennas

A unique exploration of critical topics in defected ground structures and their applications

In Defected Ground Structure (DGS) Based Antennas: Design Physics, Engineering, and Applications, three distinguished authors deliver a comprehensive discussion of key topics related to defected ground structures (DGSs) and their applications to advanced antenna designs, including microstrips, arrays, dielectric resonators, PIFA, and printed monopoles.

The book explores major advances in the technology that have occurred since 2006, as well as the fundamentals of the research in the subject. It also presents future possibilities for new researchers to assist in the development of new studies and technologies for practicing engineers and developers.

Readers will discover:
_ A thorough introduction to the concept and evolution of defected ground structure-based antennas
_ In-depth examinations of defected ground structures for printed antenna feeds
_ Comprehensive discussions of the use of defected ground structures to control unwanted modes under a microstrip patch for reducing cross-polarized radiation
_ Enlightening descriptions of defected ground structures used to control mutual coupling in arrays and MIMO designs

Perfect for students, researchers, and professionals with an interest in wireless communications, Defected Ground Structure (DGS) Based Antennas: Design Physics, Engineering, and Applications will also earn a place in the libraries of engineers and scientists working in space exploration and defense organizations.

Produktdetails

• Verlag: Wiley & Sons / Wiley-IEEE Press
• Artikelnr. des Verlages: 1W119896180
• 1. Auflage
• Seitenzahl: 320
• Erscheinungstermin: 28. Dezember 2022
• Englisch
• Abmessung: 235mm x 157mm x 22mm
• Gewicht: 531g
• ISBN-13: 9781119896180
• ISBN-10: 1119896185
• Artikelnr.: 63628887

Autorenporträt

Debatosh Guha, PhD, is a Professor in Radio Physics and Electronics at the University of Calcutta, India. He co-edited Microstrip and Printed Antennas: New Trends, Techniques and Applications in 2010. Chandrakanta Kumar, PhD, is Head of the Electromagnetics Section at the Communication Systems Group of the U R Rao Satellite Centre in Bangalore, India. His professional focus is on the design and development of antenna systems for the Indian space program. Sujoy Biswas, PhD, is an Associate Professor at the Neotia Institute of Technology -Management and Science. He is on the Board of Reviewers at a variety of journals, including IEEE Transactions on Antennas and Propagation.

Inhaltsangabe

Preface xi

Acknowledgments xv

1 Introduction to DGS: The Concept and Evolution 1

1.1 Introduction 1

1.2 Evolution of DGS 2

1.3 Definition and Basic Concept 5

1.4 Geometries and Classification 6

1.4.1 Unit Cell DGS 7

1.4.1.1 Dumbbell-Shaped DGS 7

1.4.1.2 Variations of Dumbbell-Shaped DGS 8

1.4.1.3 Spiral-Shaped DGS 12

1.4.1.4 Variations of Spiral-Shaped DGS 13

1.4.1.5 H-Shaped DGS 14

1.4.1.6 U- and V-Shaped DGSs 15

1.4.1.7 Ring-Shaped DGS 15

1.4.1.8 Other DGS Geometries 16

1.4.1.9 Tunable DGS Geometries 18

1.4.2 Periodic Uniform DGS 18

1.4.3 Periodic Nonuniform DGS 20

1.4.4 Asymmetric DGS 22

1.5 An Outline of Applications 23

References 24

2 Theoretical Analysis and Modeling 35

2.1 Introduction 35

2.2 LC and RLC Modeling 35

2.2.1 Equivalent Circuit Parameter Extraction 37

2.2.2 Utilization of the Extracted LC for n-Pole DGS Filter Design 41

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2.2.3 RLC Circuit Modeling 43

2.3 LC Circuit Modeling: Variants and Improvements 44

2.3.1 Pi-Type Equivalent Circuit 44

2.3.2 Modeling of Spiral DGS with Periodic Resonance 46

2.3.3 Modeling of DGS with Aperiodic Stopbands 51

2.3.4 Some Modifications in Modeling Approach 54

2.4 Transmission Line Modeling 55

2.5 Quasistatic Modeling 59

2.5.1 Microstrip Gap Model 62

2.5.2 Microstrip Cross Junction Model 63

2.5.3 Modeling of the Rest Current Paths 64

2.6 Modeling of Isolated DGS for Antenna applications 66

2.7 Comments on the Modeling Techniques 68

References 69

3 DGS for Printed Antenna Feeds 73

3.1 Introduction 73

3.2 Impedance Matching of Antenna Feed Lines 73

3.3 Controlling the Harmonics in Printed Antennas 75

3.3.1 Suppression of Second Harmonic (2f 0) 77

3.3.2 Suppression up to Third Harmonic (3f 0) 79

3.3.3 Suppression up to Fourth Harmonic (4f 0) 84

3.4 Filtering Antenna Using DGS 86

3.5 Improved Isolation Between Antenna Ports 88

3.6 Improvement of Antenna Bandwidth 92

3.6.1 Lowering the Q-Factor 92

3.6.2 Adjusting Higher Resonances 94

3.7 Antenna Miniaturization 94

References 98

4 DGS to Control Orthogonal Modes in a Microstrip Patch for

Cross-Pol Reduction 103

4.1 Introduction 103

4.2 Understanding of Radiating Modes in Microstrip Patches 103

4.2.1 Rectangular Patch 104

4.2.2 Circular Patch 106

4.3 WhatWere the Known Methods to Deal with the Cross-Polarized

Fields? 110

4.4 Suppression of Cross-Polarized Fields by DGS Integration Technique:

Coax-Fed Patches 112

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4.4.1 Controlling the OCDM and Cross-Polarized Radiations in

E-Plane 112

4.4.2 Controlling of TM21 Mode and Cross-Polarized Radiations in Circular

and Elliptical Patches 113

4.4.3 Controlling TM02 Mode in a Rectangular Patch and H-Plane

Cross-Polarized Radiations 116

4.4.4 Visualization of the Modal Fields and the Effect of the DGSs 117

4.4.5 Universal DGS: