This work proposes a novel compact artificial magnetic conductor (AMC) surface backed microstrip antenna of dimension (0.29λ₀ × 0.17λ₀ × 0.015λ₀) for improving the antenna radiation characteristics. The microstrip antenna considered here for performance improvement has a defected ground plane; thus, giving rise to undesired back-lobe radiation. Thanks to the, in-phase reflection characteristics of the AMC surface, gain improvement of more than 3 dBi has been achieved with a front-to-back lobe ratio improvement of 12 dB. This structure resonates at 5.8 GHz with an impedance bandwidth improvement of 13%. The overall antenna dimensions are (0.67λ₀ × 0.8λ₀ × 0.13λ₀), where λ₀ is the free space wavelength. To prove the concept, a physical prototype of the proposed antenna structure has been fabricated and the return loss, radiation pattern and gain have been verified. The obtained results are satisfactory and matching with the estimated results.

中文翻译：

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使用人造磁导体表面的紧凑型 DGS 微带贴片天线的背瓣缓解

这项工作提出了一种尺寸为（0.29 λ ₀  × 0.17 λ ₀  × 0.015 λ ₀）的新型紧凑型人造磁导体（AMC）表面支持微带天线，用于改善天线辐射特性。此处考虑用于提高性能的微带天线有一个有缺陷的接地层；因此，会产生不需要的后瓣辐射。由于 AMC 表面的同相反射特性，增益提高了 3 dBi 以上，前后瓣比提高了 12 dB。这种结构在 5.8 GHz 谐振，阻抗带宽提高了 13%。整体天线尺寸为 (0.67 λ ₀  × 0.8 λ ₀ × 0.13 λ ₀ )，其中λ ₀是自由空间波长。为了证明这一概念，我们制作了所提议天线结构的物理原型，并验证了回波损耗、辐射方向图和增益。得到的结果是令人满意的并且与估计的结果相匹配。