دانلود کتاب Modern Lens Antennas for Communications Engineering

The aim of this book is to present the modern design principles and analysis of lens antennas. It gives graduates and RF/Microwave professionals the design insights in order to make full use of lens antennas.  Why do we want to write a book in lens antennas? Because this topic has not been thoroughly publicized, its importance is underestimated. As antennas play a key role in communication systems, recent development in wireless communications would indeed benefit from the characteristics of lens antennas: low profile, and low cost etc.  The major advantages of lens antennas are narrow beamwidth, high gain, low sidelobes and low noise temperature. Their structures can be more compact and weigh less than horn antennas and parabolic antennas. Lens antennas with their quasi-optical characteristics, also have low loss, particularly at near millimeter and submillimeter wavelengths where they have particular advantages. This book systematically conducts advanced and up-to-date treatment of lens antennas.Content: Chapter 1 Introduction (pages 1–48): John Thornton and Kao?Cheng HuangChapter 2 Review of Electromagnetic Waves (pages 49–76): Kao?Cheng HuangChapter 3 Polyrod Antennas (pages 77–112): Kao?Cheng HuangChapter 4 Millimeter Wave Lens Antennas (pages 113–146): Kao?Cheng HuangChapter 5 Lens Antennas for Communications from High?Altitude Platforms (pages 147–186): John ThorntonChapter 6 Spherical Lens Antennas (pages 187–224): John ThorntonChapter 7 Hemispherical Lens?Reflector Scanning Antennas (pages 225–266): John Thornton