In this article, we proposed a novel circularly polarized magnetoelectric (ME) dipole antenna with low profile, which is excited by substrate integrated waveguide aperture-coupled feeding structure with a butterfly-shaped slot. The ME dipole antenna is formed of a couple of oblong metallic patches with square corner cutting off and elliptic perturbation acting as electric dipole, and two couples of vertical metalized via holes working as magnetic dipole. The profile of the antenna is 0.122λ₀. The antenna achieves a fractional bandwidth of 32.6% for |S11| smaller than −10 dB from 22.6 to 31.3 GHz and the 3-dB axial-ratio bandwidth (BW) of 12.8% from 22.6 to 25.7 GHz. Moreover, the gain is maintained over 6 dB for a large portion of the operational BW. The measured boresight gain is 7.8 dB.

中文翻译：

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圆极化低剖面磁电偶极子天线

在本文中，我们提出了一种新型的低剖面圆极化磁电（ME）偶极子天线，该天线由具有蝴蝶形缝隙的基板集成波导孔径耦合馈电结构激发。ME偶极子天线由一对长方角截断和椭圆微扰作为电偶极子的长方形金属贴片和两对作为磁偶极子的垂直金属化通孔组成。天线的剖面是0.122λ ₀。天线为 |S11| 实现了 32.6% 的部分带宽 从 22.6 到 31.3 GHz 小于 -10 dB，从 22.6 到 25.7 GHz 的 3 dB 轴向比带宽 (BW) 为 12.8%。此外，对于大部分工作带宽，增益保持在 6 dB 以上。测得的视轴增益为 7.8 dB。