Macro Basis Function interactions accelerated with the Inhomogeneous Plane Waves

This paper focuses on the direct computation of the interactions between the Macro Basis Functions (MBFs) defined on distinct sub-domains using their complex patterns. They are computed using a set of inhomogeneous plane waves, which can be viewed as an extension of the Fast Inhomogeneous Plane Wave Algorithm (FIPWA), using a new spectral-domain sampling. Examples of slot antennas and 3D frustum array are used to validate the proposed method.