Martin Stumpf

Time-Domain Electromagnetic Reciprocity in Antenna Modeling (eBook, PDF)

• Format: PDF

Produktbeschreibung

Describes applications of time-domain EM reciprocity and the Cagniard-deHoop technique to achieve solutions to fundamental antenna radiation and scattering problems This book offers an account of applications of the time-domain electromagnetic (TD EM) reciprocity theorem for solving selected problems of antenna theory. It focuses on the development of both TD numerical schemes and analytical methodologies suitable for analyzing TD EM wave fields associated with fundamental antenna topologies. Time-Domain Electromagnetic Reciprocity in Antenna Modeling begins by applying the reciprocity theorem to formulate a fundamentally new TD integral equation technique - the Cagniard-deHoop method of moments (CdH-MoM) - regarding the pulsed EM scattering and radiation from a thin-wire antenna. Subsequent chapters explore the use of TD EM reciprocity to evaluate the impact of a scatterer and a lumped load on the performance of wire antennas and propose a straightforward methodology for incorporating ohmic loss in the introduced solution methodology. Other topics covered in the book include the pulsed EM field coupling to transmission lines, formulation of the CdH-MoM concerning planar antennas, and more. In addition, the book is supplemented with simple MATLAB code implementations, so that readers can test EM reciprocity by conducting (numerical) experiments. In addition, this text: * Applies the thin-sheet boundary conditions to incorporate dielectric, conductive and plasmonic properties of planar antennas * Provides illustrative numerical examples that validates the described methodologies * Presents analyzed problems at a fundamental level so that readers can fully grasp the underlying principles of solution methodologies * Includes appendices to supplement material in the book Time-Domain Electromagnetic Reciprocity in Antenna Modeling is an excellent book for researchers and professors in EM modeling and for applied researchers in the industry.

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Produktdetails

• Verlag: John Wiley & Sons
• Seitenzahl: 256
• Erscheinungstermin: 2. September 2019
• Englisch
• ISBN-13: 9781119612308
• Artikelnr.: 57694518

Autorenporträt

MARTIN STUMPF, PhD, is an Associate Professor of Electromagnetic Theory at Brno University of Technology, Brno, The Czech Republic. His research interests include analytical and numerical modeling of wave and diffusive field phenomena with an emphasis on electromagnetic compatibility and antenna engineering. He is a member of the IEEE and the IEEE Antennas and Propagation and Electromagnetic Compatibility Societies.

Inhaltsangabe

Preface xiii

Acronyms xv

1 Introduction 1

1.1 Synopsis 2

1.2 Prerequisites 5

1.2.1 One-Sided Laplace Transformation 6

1.2.2 Lorentz's Reciprocity Theorem 8

2 Cagniard-Dehoop Method of Moments for Thin-Wire Antennas 15

2.1 Problem Description 15

2.2 Problem Formulation 16

2.3 Problem Solution 18

2.4 Antenna Excitation 20

2.4.1 Plane-Wave Excitation 20

2.4.2 Delta-Gap Excitation 21

Illustrative Example 22

3 Pulsed EM Mutual Coupling Between Parallel Wire Antennas 25

3.1 Problem Description 25

3.2 Problem Formulation 26

3.3 Problem Solution 27

4 Incorporating Wire-Antenna Losses 29

4.1 Modification of the Impedance Matrix 30

5 Connecting a Lumped Element to The Wire Antenna 31

5.1 Modification of the Impedance Matrix 32

6 Pulsed EM Radiation from a Straight Wire Antenna 35

6.1 Problem Description 35

6.2 Source-Type Representations for the TD Radiated EM Fields 36

6.3 Far-Field TD Radiation Characteristics 38

7 EM Reciprocity Based Calculation of Td Radiation Characteristics 41

7.1 Problem Description 41

7.2 Problem Solution 42

Illustrative Numerical Example 43

8 Influence of a Wire Scatterer on a Transmitting Wire Antenna 47

8.1 Problem Description 47

8.2 Problem Solution 48

Illustrative Numerical Example 49

9 Influence of a Lumped Load on EM Scattering of a Receiving Wire Antenna 53

9.1 Problem Description 53

9.2 Problem Solution 54

Illustrative Numerical Example 55

10 Influence of a Wire Scatterer on a Receiving Wire Antenna 59

10.1 Problem Description 59

10.2 Problem Solution 59

Illustrative Numerical Example 61

11 EM-Field Coupling to Transmission Lines 65

11.1 Introduction 65

11.2 Problem Description 68

11.3 EM-Field-To-Line Interaction 68

11.4 Relation to Agrawal Coupling Model 71

11.5 Alternative Coupling Models Based on EM Reciprocity 73

11.5.1 EM Plane-Wave Incidence 73

11.5.2 Known EM Source Distribution 74

12 EM Plane-Wave Induced Thévenin's Voltage on Transmission Lines 77

12.1 Transmission Line Above the Perfect Ground 77

12.1.1 Thévenin's Voltage at x = x1 78

12.1.2 Thévenin's Voltage at x = x2 81

12.2 Narrow Trace on a Grounded Slab 83

12.2.1 Thévenin's Voltage at x = x1 85

12.2.2 Thévenin's Voltage at x = x2 88

Illustrative Numerical Example 89

13 VED-Induced Thévenin's Voltage on Transmission Lines 93

13.1 Transmission Line Above the Perfect Ground 93

13.1.1 Excitation EM Fields 94

13.1.2 Thévenin's Voltage at x = x1 97

13.1.3 Thévenin's Voltage at x = x2 98

13.2 Influence of Finite Ground Conductivity 98

13.2.1 Excitation EM Fields 98

13.2.2 Correction to Thévenin's Voltage at x = x1 100

13.2.3 Correction to Thévenin's Voltage at x = x2 101

Illustrative Numerical Example 101

14 Cagniard-Dehoop Method of Moments for Planar-Strip Antennas 103

14.1 Problem Description 105

14.2 Problem Formulation 106

14.3 Problem Solution 107

14.4 Antenna Excitation 109

14.4.1 Plane-Wave Excitation 110

14.4.2 Delta-Gap Excitation 111

14.5 Extension to a Wide-Strip Antenna 111

Illustrative Numerical Example 117

15 Incorporating Strip-Ante