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Design of Defective EBG Structures for Dual-Band Circular Patch MIMO Antenna Applications

机译：双频段圆形贴片MIMO天线应用中的不良EBG结构设计

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摘要

Usually, a reasonably designed electromagnetic band-gap (EBG) structure can reduce the surface wave of an antenna. However, it may take a long time to design. In this paper, a dual-band circular patch multiple-input multiple-output (MIMO) antenna on an EBG surface is proposed. Defects are simply introduced into rows and columns of the EBG cells. In this way, the band-gap bandwidth (BG-BW) of those cells can be as large as 29.2%, which enables the EBGs can cover two frequency bands with a large interval, and to generate over 25 dB isolation between the antenna elements, as well. The measured results show that the proposed antenna, incorporating defective EBGs, operates at 5.71-5.97 GHz and 6.31-6.54 GHz. The -10 dB impedance bandwidth of the antenna is extended by 28.9% and 27.8% at the low and high frequency band. In addition, its gain is enhanced by 5 dB and 6.9 dB, and its back radiation decreased by 15 dB and 10.3 dB at the resonant frequencies of 5.75 GHz and 6.44 GHz, respectively. The proposed design may have many applications in communication systems.
机译：通常，合理设计的电磁带隙（EBG）结构可以减少天线的表面波。但是，设计可能需要很长时间。本文提出了一种在EBG表面上的双频带圆形贴片多输入多输出（MIMO）天线。缺陷被简单地引入到EBG单元的行和列中。这样，这些小区的带隙带宽（BG-BW）可以高达29.2％，这使得EBG可以以较大的间隔覆盖两个频段，并在天线元件之间产生超过25 dB的隔离，以及。测量结果表明，所建议的天线结合了有缺陷的EBG，工作于5.71-5.97 GHz和6.31-6.54 GHz。天线的-10 dB阻抗带宽在低频段和高频段分别扩展了28.9％和27.8％。此外，在5.75 GHz和6.44 GHz的谐振频率下，其增益分别提高了5 dB和6.9 dB，并且其反向辐射分别降低了15 dB和10.3 dB。所提出的设计在通信系统中可能有许多应用。

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