A Fast Analysis Method for Large Finite Array Based on Near-Field Huygens Surface Data

A fast analysis method for large finite arrays is proposed, which directly employs the near-field Huygens surface data of an isolated element instead of its full structural model. By combining the equivalence principle with the reciprocity theorem, both the port current and the far-field radiation pattern of array elements can be efficiently computed from the near-field data. Since the actual geometry does not need to be discretized, the method eliminates the heavy computational burden of mesh generation and matrix solving, resulting in significantly reduced time consumption and memory usage. Numerical results demonstrate that the proposed method achieves high accuracy and efficiency in analyzing large finite antenna arrays.