The primary goal of this text is to present the salient aspects of antenna technology and relate these to working applications. It contains a mix of topics; covering the analytical aspects of indoor and outdoor antennas and their relevance to wireless/mobile communications, along with descriptions of the underlying principles and the associated antenna design considerations. The scope of the book covers industry-oriented research, design and development of wireless antennas and is suitable as a course text for students at postgraduate and undergraduate level.