Compact multifunctional antennas for wireless systems

Preface

The objective of this book is to provide up-to-date information on modern multifunctional antennas and microwave circuits. Today, it is a trend to bundle multiple components into a single module to achieve high compactness and good signal quality. In the last two decades, the multifunctional concept has already been applied extensively to miniaturize various active and passive radio-frequency devices. Active antennas can be considered one of the earliest multifunctional antennas that have received a high level of attention from both academia and industry. Due to the rapid advancement of packaging technologies, various multifunctional devices can be made easily using such new techniques as antenna-on-package, antenna-in-package, and low-temperature-co-fired. Although there are many books describing the design of active and passive microwave systems, the multifunctional concept has yet to be fully explored for antennas and microwave circuits.

In this book, antennas are incorporated with active and passive microwave devices to design various multifunctional modules. The first part of the book introduces several novel passive components, such as an antenna filter and an antenna packaging cover. To make the coverage more complete, the development of the balun filter, a relatively new component, is also covered. Then, switches are integrated into antenna structures to achieve reconfiguration. Some recent work from the Institute of Applied Physics at the University of Electronic ...