Mutual coupling between antennas

"The aim of this book to provide an up-to-date description of the physical effects of mutual coupling for a variety of antennas and for techniques for analysing and assessing its effects. Practical aspects of mutual coupling will be presented as well as applications to show where the performance is impacted both positively and negatively by taking it into account. Mutual coupling is an important aspect of antenna array design that it is often neglected due to complexity or lack of computing power. It is a function of distance between the antennas, and depends on the near fields of the individual antenna elements, their proximity and their polarization. It can be analysed rigorously by a wide variety of methods from direct computer software using discrete methods, to integral equations and Greens function methods as well as approximate asymptotic methods. The book is directed at technical specialists, researchers and students working on problems connected with mutual interaction between antennas. A background in basic electromagnetics and antennas concepts is assumed"--

<P>Preface xv</p> <p>Acknowledgments xvii</p> <p>List of Contributors xix</p> <p>Notation xxi</p> <p><b>1 Introduction </b><b>1<br /></b><i>Trevor S. Bird</i></p> <p>1.1 Aims and Scope 1</p> <p>1.2 Historical Perspective 3</p> <p>1.3 Overview of Text 4</p> <p>References 7</p> <p><b>2 Basics of Antenna Mutual Coupling </b><b>9<br /></b><i>Trevor S. Bird</i></p> <p>2.1 Introduction 9</p> <p>2.2 Electromagnetic Field Quantities 9</p> <p>2.2.1 Definitions 9</p> <p>2.2.2 Field Representations in Source-Free Regions 11</p> <p>2.3 Mutual Coupling Between Elementary Sources 12</p> <p>2.3.1 Radiation 12</p> <p>2.3.2 Generalized Infinitesimal Current Elements 14</p> <p>2.3.3 Mutual Coupling Between Infinitesimal Current Elements 15</p> <p>2.4 Network Representation of Mutual Coupling 18</p> <p>2.4.1 Extension to Combination of Elements 18</p> <p>2.4.2 Mutual Impedance and Admittance Matrix Formulation 19</p> <p>2.4.3 Scattering Matrix Representation 20</p> <p>2.5 Radiation from Antennas in the Presence of Mutual Coupling 23</p> <p>2.5.1 Far-Field Radiation 23</p> <p>2.5.2 Magnetic Current Only 25</p> <p>2.5.3 Electric Current Only 25</p> <p>2.6 Conclusion 26</p> <p>References 26</p> <p><b>3…