Microstrip antennas integrated with electromagnetic band-gap (EBG) structures: A low mutual coupling design for array applications
Microstrip antennas integrated with electromagnetic band-gap (EBG) structures: A low mutual coupling design for array applications
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DOI：
10.1109/tap.2003.817983
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发表时间：
2003-10-01
影响因子：
5.7
通讯作者：
Rahmat-Samii, Y
中科院分区：
文献类型：
--
作者：
Yang, F;Rahmat-Samii, Y
电磁带隙（EBG）结构的利用在电磁和天线群落中变得有吸引力。在本文中，使用有限差分时间域（FDTD）方法分析了类似蘑菇的EBG结构。通过表现出电磁波的近场分布来证明其表面波抑制的带隙特征。参数研究了微带天线的相互耦合，包括E和H耦合方向，不同的底物厚度和各种介电常数。可以观察到，由于明显的表面波，厚且高介电常数底物上的E平面耦合的微带天线阵列具有很强的相互耦合。因此，在数组元素之间插入EBG结构，以减少相互耦合。 FDTD模拟和实验结果都证实了这一想法。结果，从测量值中发现了显着的8 dB相互耦合。
Utilization of electromagnetic band-gap (EBG) structures is becoming attractive in the electromagnetic and antenna community. In this paper, a mushroom-like EBG structure is analyzed using the finite-difference time-domain (FDTD) method. Its band-gap feature of surface-wave suppression is demonstrated by exhibiting the near field distributions of the electromagnetic waves. The mutual coupling of microstrip antennas is parametrically investigated, including both the E and H coupling directions, different substrate thickness, and various dielectric constants. It is observed that the E-plane coupled microstrip antenna array on a thick and high permittivity substrate has a strong mutual coupling due to the pronounced surface waves. Therefore, an EBG structure is inserted between array elements to reduce the mutual coupling. This idea has been verified by both the FDTD simulations and experimental results. As a result, a significant 8 dB mutual coupling reduction is noticed from the measurements.