This book represents the theory of microstrip patch antenna (MPA), various literature reviews that Author has gone through to improve bandwidth of MPA. Firstly, it includes parametric study of MPA, effect of stacking phenomena in overall results as well as rotation of upper patch antenna with respect to lower patch antenna. Secondly, author throws light on various NOVEL techniques to improve bandwidth. Finally, all the results in this book is verified with fabrication and measurement.Author has also compare the various results at last to make the best suitable antenna for wide bandwidth. The achieved results show very good agreement with simulated results. This book will be useful guide for Graduates and Post graduate students who want to pursue their bright carrier in Antenna and Wave Propagation domain.