Energy efficiency in all aspects of modern society is now a widespread desire and an active goal. Whether it manifests as driving a high mileage automobile or using a highly rated energy-efficient refrigerator, there is no aspect of modern life that does not benefit from improvement in the energy efficiency used.

Wireless communications are now one of the ubiquitous technological underpinnings of modern society. Mobile communications devices and smart-phones are always at hand and reliably work for the user. As such, it is particularly important for everything involved in wireless communications to be energy efficient. As communication speeds have increased over recent decades, the unfortunate by-product is that the energy efficiency of wireless communications has actually decreased significantly. It is now overdue and important that this gets fixed.

Standards committees have placed the data rate performance of the wireless signals they adopt ahead of any other concern. This means that the energy efficiency of the wireless communication system has not been part of deliberations during the standardization process. The signals adopted years ago are still with us, and there are no plans to change them anytime soon. It is now therefore important to change how these communications devices are made, and to adopt new architectures that will provide the needed energy efficiency while still generating these old signals that are present within the deployed communications standards.

To get full value from this book, the reader should already have a basic familiarity with electrical engineering and wireless communication concepts, including the Fourier transform relationship between time-domain and frequency-domain operations. It is not necessary to have familiarity with the present communications standards.

The contents of this book are drawn from the nearly 20 years of experience I have with dynamic power supply transmitter technology.