Micromanagement of the Backscattered Field

We are now going to show how we can pinpoint exactly any scattering anomalies in an array and how to alleviate it. To illustrate our approach, we are again going to consider a finite array of active dipoles backed by a finite FSS groundplane as shown in Fig. 5.4, top. It is being exposed to an incident plane wave at broadside. 

Calculate all element currents including all mutual impedances (rigorous and exact). 

Calculate all fields from each triad (see above figure) and plot in the complex plane see Fig. 5.6. 

We start by calculating aU column currents in the entire array configuration. Note that we take into account aU mutual impedances between all wire segments that is, the calculated currents are exact within the accuracy of the Method of Moments. 

Most readers would at this point be tempted to obtain the entire scattered field by simply adding the fields reradiated by each wire section. Although this would be technically correct, it is precisely what not to do. Rather, the scattered fields should be grouped together in a meaningful way. 

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