DGS is a non-periodic structure which is extended from EBG structure. Some DGS can slow wave and have single pole and low pass characteristic, and high effective characteristic impedance.

• DGS(Defected Ground Structure)是由EBG结构发展而来的非周期性或周期单元很少的微波结构,某些DGS具有单极点低通特性、慢波特性、高等效特性阻抗特性。