The microstrip patch antennas are one of the most innovative areas of research work in the wireless technology. The book contains general back ground of the microstrip patch antenna. It is briefly outlined the problems of the microstrip patch antennas so far developed and the needs of present days wireless systems. It is also briefly pointed out the problems of wide band probe-fed microstrip patch antennas in terms of design as well as modeling techniques. The book includes, the design of new wide band probe fed microstrip patch antenna of single resonance frequency and multi resonance''s. A new method to calculate the resonance frequency of microstrip antenna is presented in the book. The book gives an overview of Artificial Neural Network(ANN) and the use of Artificial Neural Network(ANN) to calculate the design parameter microstrip patch antennas. The calculation of antenna parameters using the Artificial Neural Networks(ANNs) is an interesting part of the book.