缺陷地结构抑制微带阵列天线间互耦

Defected Ground Structure Suppressing Microstrip Antenna Array Mutual Coupling

本文提出一种新型的缺陷地结构(Defected Ground Structure,DGS),用于抑制微带阵列天线阵元间的互耦。在阵元间距为0.25λ_0(λ_0为自由空间波长)的阵列天线阵元间加载级联的该结构。研究结果表明,在谐振频率为5.8GHz附近,加载DGS后天线阵元间的耦合度降低了26.8dB,且抑制带宽较大。该结构可以很好地抑制天线表面波的传播,改善天线阵元间的互耦。

A novel defected ground structure （DGS） is proposed to suppress the mutual coupling in mi-crostrip antenna array. The cascaded structure is etched on the ground between two 0.25 ,λ0 （λ0 is the wavelength in free space） spaced array antennas. The results show that the coupling reduction between the antenna array is about 26.8 dB at the resonant frequency of 5.8 GHz, and there is a wider suppression bandwidth with the DGS. The structure can effectively suppress the surface wave of the antenna, and decrease the mutual coupling in the antenna array.