This book examines the critical differences between current and next-generation Si technologies (CMOS, BiCMOS and SiC) and technology platforms (e.g. system-on-chip) in mm-wave wireless applications. We provide a basic overview of the two technologies from a technical standpoint, followed by a review of the state-of-the-art of several key building blocks in wireless systems. The influences of system requirements on the choice of semiconductor technology are vital to understanding the merits of CMOS and BiCMOS devices – e.g., output power, battery life, adjacent channel interference, cost restrictions, and so forth. These requirements, in turn, affect component-level design and performance metrics of oscillators, mixers, power and low-noise amplifiers, as well as phase-locked loops and data converters. Finally, the book offers a peek into the next generation of wireless technologies such as THz -band systems and future 6G applications.
This book provides a detailed review of millimeter-wave power amplifiers, discussing design issues and performance limitations commonly encountered in light of the latest research. Power amplifiers, which are able to provide high levels of output power and linearity while being easily integrated with surrounding circuitry, are a crucial component in wireless microwave systems. The book is divided into three parts, the first of which introduces readers to mm-wave wireless systems and power amplifiers. In turn, the second focuses on design principles and EDA concepts, while the third discusses future trends in power amplifier research. The book provides essential information on mm-wave power amplifier theory, as well as the implementation options and technologies involved in their effective design, equipping researchers, circuit designers and practicing engineers to design, model, analyze, test and implement high-performance, spectrally clean and energy-efficient mm-wave systems.
This book comprehensively reviews the state of the art in millimeter-wave antennas, traces important recent developments and provides information on a wide range of antenna configurations and applications. While fundamental theoretical aspects are discussed whenever necessary, the book primarily focuses on design principles and concepts, manufacture, measurement techniques, and practical results. Each of the various antenna types scalable to millimeter-wave dimensions is considered individually, with coverage of leaky-wave and surface-wave antennas, printed antennas, integrated antennas, and reflector and lens systems. The final two chapters address the subject from a systems perspective, providing an overview of supporting circuitry and examining in detail diverse millimeter-wave applications, including high-speed wireless communications, radio astronomy, and radar. The vast amount of information now available on millimeter-wave systems can be daunting for researchers and designers entering the field. This book offers readers essential guidance, helping them to gain a thorough understanding based on the most recent research findings and serving as a sound basis for informed decision-making.
After a desperate and impoverished childhood Engela, as a rebellious teenager, becomes mixed up with Satanism, alcohol and drugs. She eventually flees to Bloemfontein because the leader of the Satanic Group 13 wants to kill her. Her path crosses with Pieter, a friend of her brother's, who turns her over to the owner of a brothel to clear his debt. There she is kept as a sex slave. Her only wish is to escape, but how? Every night the club's doors are shuttered. Her final shot at freedom is the young student Jacques who works in the club's reception area. But then he disappears from the scene following a mysterious accident in the Drakensberg . . . In the second part of the book Elanie shares her experiences from a Christian perspective - her life as a sex slave, how she learned to cope with despair, loneliness, pain and humiliation. She reaches out to victims of sex trafficking, exploring the power of forgiveness and acceptance, and also offers essential practical advice for parents and children. From Playground to Prostitute is a gripping thriller based on Elanie Kruger's life story. 'Unfortunately many teenagers these days find themselves in the same circumstances I was trapped in. Parents exist in a cocoon of denial as far as the reality is concerned and think these things always happen elsewhere. When a child disappears they always say to me: "If only I knew." Do YOU know enough to keep your child out of the clutches of human trafficking?
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