Near-field multi-antenna wireless communication has attracted growing research interest in recent years. Despite this development, most of the current literature on antennas and reflecting structures relies on simplified models, whose validity for real systems remains unclear. In this paper, we introduce a physically consistent near-field model, which we use to evaluate commonly used models. Our results indicate that common models are sufficient for basic beamfocusing, but fail to accurately predict the sidelobes and frequency dependence of reflecting structures.

翻译：近年来，近场多天线无线通信日益受到研究关注。尽管相关研究不断发展，当前大多数关于天线和反射结构的文献仍依赖于简化模型，这些模型在实际系统中的有效性尚不明确。本文提出了一种物理一致的近场模型，并以此评估常用模型的有效性。研究结果表明，常用模型对于基本波束聚焦是足够的，但无法准确预测反射结构的旁瓣特性与频率依赖性。