Antenna RCS and RCSR

The purpose of this chapter has been to present an overview of antenna RCS and its control. All investigators who deal with antenna RCS separate the signature into two components. One, the structural component, is that scattering which is independent of the fact that the object investigated is designed to be an antenna. The second component is the antenna mode scatter, whose character is directly related to the antenna pattern. However, there are a number of different definitions of what portion of the total return constitutes structural versus antenna mode scatter. Hansen has shown that the definitions are arbitrary, and because of its intuitive appeal, we have chosen to use one that defines the structural scatter as that seen when the antenna is terminated in a matched load.