A compact hybrid-mode antenna is proposed for sub-6 GHz communication. The proposed antenna is composed of a slotted rectangular patch, a feeding dipole, and a balun. Three modes are sequentially excited in a shared patch to achieve a compact size. A prototype antenna with a major size of 0.48 λ₀ × 0.31 λ₀ × 0.16 λ₀ (λ₀ is the wavelength in the free space at the center of the operating frequency band) is fabricated and measured. The measured results demonstrate an impedance bandwidth of 56.87% from 2.97 GHz to 5.33 GHz and an average gain of approximately 8.00 dBi with 1 dB variation in the operating frequency band of 3.0–5.0 GHz. The proposed antenna can be an element for microbase stations in sub-6 GHz communication.

中文翻译：

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用于6 GHz以下通信的紧凑型缝隙贴片混合模式天线

提出了用于6 GHz以下通信的紧凑型混合模式天线。拟议的天线由开缝的矩形贴片，馈电偶极子和不平衡变压器组成。在共享补丁中依次激励三种模式，以实现紧凑的尺寸。原型天线具有0.48的主要尺寸λ ₀  ×0.31 λ ₀  ×0.16 λ ₀（λ ₀是在工作频带中心的自由空间中的波长）。测量结果表明，在2.97 GHz至5.33 GHz范围内，阻抗带宽为56.87％，平均增益约为8.00 dBi，而在3.0–5.0 GHz的工作频带内变化为1 dB。所提出的天线可以是低于6 GHz通信中微基站的元件。