A fast certified parametric near-field-to-far-field transformation technique for electrically large antenna arrays

This paper presents a fast certified numerical method for computing radiation patterns of electrically large antenna arrays over broad frequency bands and wide ranges of look angles. The suggested scheme combines finite-element analysis with empirical interpolation and employs a sub-domain approach on the Huygens surface to reduce computational costs in the offline part of the algorithm. To assure the reliability of the numerical results, an accurate and efficiently computable a posteriori error bound for the radiation patterns is proposed. A real-world example is presented to demonstrate the efficiency and accuracy of the suggested approach.