Park of Korea Scholar presented a novel structure called Defected Ground Structure (DGS), which has bandgap characteristics and slow-wave effect, just like photonic bandgap structure.

• Park等人提出了一种和光子带隙结构一样具有带隙特性和慢波特性的新颖结构,取名为“Defected Ground Structure”,俗称缺陷接地结构(DGS)。