The aim of this book is to provide the reader with the techniques and theory that are required for the analysis and modeling of radio wave propagation in complex environments. It is designed for the reader who might need to model propagation in order to understand the performance of radio systems for navigation, radar, communications or broadcasting. The book brings together a range of topics that are often treated separately, but all of which are important in the comprehensive modeling of a radio system. In particular, the book includes an extensive discussion of propagation through irregularity, of importance to systems that suffer from scintillation. The book is not intended to be just a cookbook of propagation formulae, but rather to provide readers with sufficient insight to enable them to produce their own specialized theory and techniques when required. It is my experience that many propagation problems are not amenable to off-the-shelf black box solutions. A black box will often only provide part of the solution and the modeler will need to modify and/or add capability. To do this successfully, the modeler will need to have some insight into the basis of the black box in order to effectively incorporate his/her own modifications. It is the intention of the author to provide the reader with such insight. The book leverages on my experience, over several decades, in the development of techniques for the analysis and modeling of propagation in a variety of radar and communication systems. In writing this book, I have been heavily influenced by the work of Professor James Wait, Dr. G.D.Monteath, Dr. Jenifer Haselgrove, and Dr. Kenneth Davies. In particular, the reciprocity ideas that have been developed by Dr. Monteath have proven invaluable in the development of many propagation modeling techniques.

The book is designed to take the reader from very basic ideas concerning radio systems to advanced propagation modeling. The first chapter will be useful to someone new to radio systems and provide them with an idea of the technology and the challenges that radio wave propagation imposes. Obviously, this chapter can be skipped by those readers who are already familiar with radio technology.