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Scattering properties of the ideal antenna in receive mode

An ideal antenna (IA) is defined as one whose directivity in transmit mode is the largest attainable for all possible excitations within the same physical structure, barring superdirectivity. Scattering properties of this antenna can then be derived. In particular, the IA delivers all the power incident upon its aperture into the load. It is emphasized that a scattering pattern can be characterized, however it signifies scattered pseudo-power with associated scattering pseudo-cross section whose properties are detailed below.