A millimeter-wave (mmW) low-profile wideband magneto-electric (ME) monopole antenna with the vertically polarized endfire radiation is presented by combining a pair of the top-loaded electric monopoles with a thin open-ended substrate integrated waveguide (SIW) with the extended lower broad wall. The antenna has a profile of 0.19 wavelength at the center frequency of the operating band, a wide bandwidth of 60.7% (from 23.5 to 44 GHz) covering all the fifth-generation (5G) mmW bands in the Ka-band, a stable gain of around 7 dBi, and a tilted radiation pattern. Then a $1 \times 8$ ME-monopole array is designed to investigate the beam scanning properties and the effects of the metallic ground and the polycarbonate radome, which should be considered in practical applications. As a sample, a $1 \times 8$ array fed by an SIW feed network, assembled on a metallic ground plane, and covered by a polycarbonate radome is finally designed, fabricated, and measured. The prototype achieves promising radiation features with a gain up to 15.3 dBi. Owing to the compact low-profile structure with good performance, the proposed design would be valuable to the mmW applications.

中文翻译：

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适用于毫米波应用的具有 60% 带宽的薄型垂直极化磁电单极天线

通过将一对顶部加载的电单极子与薄开口衬底集成波导 (SIW) 相结合，提出了一种具有垂直极化端射辐射的毫米波 (mmW) 低剖面宽带磁电 (ME) 单极子天线与延长的下宽墙。该天线在工作频段的中心频率处具有 0.19 波长的轮廓，60.7% 的宽带宽（从 23.5 到 44 GHz）覆盖了所有第五代 (5G) mmW 频段K a-band、大约 7 dBi 的稳定增益和倾斜的辐射模式。然后一个 $1 \times 8$ ME-单极子阵列旨在研究光束扫描特性以及金属地面和聚碳酸酯天线罩的影响，在实际应用中应予以考虑。作为样本，一个 $1 \times 8$ 由 SIW 馈电网络馈电、组装在金属接地平面上并由聚碳酸酯天线罩覆盖的阵列最终被设计、制造和测量。该原型实现了有前途的辐射特性，增益高达 15.3 dBi。由于紧凑的低剖面结构具有良好的性能，所提出的设计对毫米波应用很有价值。