Following on the post about the basics of microstrip patch antennas, this post addresses the methods of feeding the RF signal to the antenna. A number of popular methods are discussed and described. The fundmentals are quite clear. A follow on post to this one is the analysis and description of the input impedance of the microstrip patch antenna to be posted shortly. Interested readers can download the article from the Signal Processing Group Inc, website by clicking on the menu item ” complementary”, and choosing the appropriate link.