Defected Ground Structure (DGS) is a non-periodic microwave structure which is extended from PBG structure. It can prohibit the propagation of electromagnetic waves within a certain band of frequencies. Just like PBG structure, it also has bandstop.

• 缺陷接地结构DGS(Defected Ground Structure)是由PBG结构发展而来的非周期性或周期单元很少的微波结构,它与光子带隙结构一样,能够使得特定频段内的电磁波完全不能在其中传输,具有明显的禁带特性。