Pattern synthesis using reactive loads and transmission line sections for a singly fed array

A feed network design is presented for an array antenna fed by a single source. A specified radiation pattern from the array, with a set of known terminal voltages, can be synthesized by choosing the appropriate characteristic impedance and length of feed transmission-line sections and reactive loads at the terminals of each element. Two configurations, a series feed and a parallel feed, are described. As an example, this method is applied to the feed network design of a singly fed linear dipole array, but the method is general enough to be applied to any type of array which can be characterized by a multiport terminal admittance matrix. Some results are shown for the bandwidth of the radiation pattern and input impedance