This article picks up where Part 3 left off by diving into the topic of series feeds for microstrip array antennas. The combination of series- and parallel-feed techniques will also be examined.
Series Feed for Microstrip Array Antennas
In addition to the parallel, or corporate, feed for microstrip antenna arrays, the series feed represents another array implementation method.1 Figure 1 illustrates the microstrip array series feed with an N-element array, as well as a five-element array featuring the ease with which amplitude taper may be implemented.
1. Series-feed microstrip arrays include an N-element array, shown on top, while the bottom reveals a five-element array.