Anomalous effects of phased array antennas due to mutual coupling and feeding network

The authors discuss the influence of both mutual coupling and the feeding network on anomalous effects of phased array antennas, such as pattern deformation and reflection coefficients mod Gamma mod >1, on array stacks. They demonstrate that these problems already occur for very simple systems. On the basis of simple configurations it is shown that the feeding network has a dominant overall effect on the far field pattern while the mutual coupling can cause distortions in detail. By showing that the effects of the feeding network can be dominant over the mutual coupling, especially for wideband systems, the array design is put on a new basis.<>