Microstrip patch antennas have become the favorite of antenna designers because of their versatility and having the advantages of planar profile, ease of fabrication, compatibility with integrated circuit technology, and conformability with a shaped surface. There is a need for graduate students and practicing engineers to gain an in depth understanding of this subject. The first edition of this book, published in 2011, was written with this purpose in mind. This second edition contains approximately one third new materials. The authors, Prof KF Lee, Prof KM Luk and Dr HW Lai, have all made significant contributions in the field. Prof Lee and Prof Luk are IEEE Fellows. Prof Lee was the recipient of the 2009 John Kraus Antenna Award of the IEEE Antennas and Propagation Society while Prof. Luk receives the same award in 2017, both in recognition of their contributions to wideband microstrip antennas. Readership: Graduate students, academics and antenna designers in the industry. Review of the First Edition: "With problems at the end of each chapter and many references, this book on MPA is an outstanding textbook for a graduate course or as a self-study guide for the practicing engineer. It will not only give the reader a firm understanding of the fundamentals of MPAs but will also provide the necessary tools for designing and optimizing MPAs. Anyone who designs MPAs or wants to learn about them needs to get a copy of this book." -- IEEE Electrical Insulation Magazine Kai Fong Lee received his PhD degree from Cornell University. He is Professor of Electrical Engineering at the University of Mississippi, where he served as Dean of Engineering from 2001 to 2009. He was the founding head of the Department of Electronic Engineering at City University of Hong Kong. An IEEE Fellow, he was the recipient of the 2009 John Kraus Antenna Award of the IEEE Antennas and Propagation Society for exceptional contributions to the field of antennas. He invented the wideband U-slot patch antenna and expanded the U-slot technique to small size, dual/triple band, and circular polarization applications. Professor Kwai-Man Luk received the BSc (Eng.) and PhD from The University of Hong Kong. He is Director of the State Key Laboratory of Millimeter Waves at the City University of Hong Kong. He is the author of over 260 journal papers with over 2000 citations. He was awarded over 12 patents on the designs of various printed antennas. He is the Deputy Editor in-Chief of the Journal of Electromagnetic Waves and Applications . He was a member of the Scientific Board, EC Network of Excellence in Antennas, Europe. Professor Luk is a Fellow of the Institute of Electrical and Electronics Engineers, Inc.