This paper presents a triple-band planar antenna with diverse radiation patterns. The proposed planar antenna is a modified swastika shape with three fingers and the ground plane is a circle with rectangular slots etched on four sides radially. The slotted ground plane is loaded with Four PIN diodes to realign the surface current. Pattern reconfigurability is achieved at the triple bands by changing the states of the diode. The antenna operates in triple bands centered at 2.2, 2.9 and 3.5 GHz. The antenna is printed on FR4 Epoxy substrate. The simulated reflection coefficient is well below −10dB at resonant frequencies. The measured patterns and return loss are in very close agreement with the simulated results. This antenna can find potential applications in 5G systems.

中文翻译：

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用于 5G 应用的三频模式可重构平面天线

本文提出了一种具有多种辐射模式的三频平面天线。所提出的平面天线是一个修改过的带有三个手指的卐字形，接地平面是一个圆形，在四个侧面径向蚀刻了矩形槽。开槽接地层装有四个 PIN 二极管以重新调整表面电流。通过改变二极管的状态，可以在三波段实现模式可重构性。该天线在以 2.2、2.9 和 3.5 GHz 为中心的三频段工作。天线印刷在 FR4 环氧树脂基板上。在谐振频率下，模拟的反射系数远低于 -10dB。测量的模式和回波损耗与模拟结果非常接近。这种天线可以在 5G 系统中找到潜在应用。