In this article, a novel design of dielectric resonator antenna (DRA) with a reconfigurable radiation pattern capability is presented. Reconfigurability in the azimuth plane is achieved by symmetrically placing six electromagnetic bandgap (EBG) sectors around the DRA. Each sector is composed of 26 circular-shaped mushroom-like EBG unit cell. In order to achieve 360° pattern reconfigurability with a minimum number of diodes, a network of metallic veins printed on a conductor-backed dielectric slab is used to group and connect the vias in each EBG sector. In addition, a switching p-i-n diode is integrated to the circuit to control the beam steering in the entire azimuth plane toward the respective desired sector by turning on and off the diode. Sixty GHz DRA prototype incorporating the EBG switching circuit is fabricated and tested. Results show 360° pattern reconfigurability in the azimuth plane, with a realized gain of 4.2 dBi, and less than −16 dB impedance matching level over the desired bandwidth are achieved.

中文翻译：

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用于毫米波 5G 应用的辐射方向图可重构天线系统的新设计

在本文中，介绍了一种具有可重构辐射图功能的介电谐振器天线 (DRA) 的新颖设计。通过在 DRA 周围对称放置六个电磁带隙 (EBG) 扇区来实现方位平面的可重构性。每个扇区由 26 个圆形蘑菇状 EBG 单元组成。为了使用最少数量的二极管实现 360° 图案可重构性，印刷在导体背衬电介质板上的金属静脉网络用于对每个 EBG 扇区中的通孔进行分组和连接。此外，电路中集成了一个开关 pin 二极管，通过打开和关闭二极管来控制整个方位平面中的波束转向，朝向相应的所需扇区。制造并测试了包含 EBG 开关电路的 60 GHz DRA 原型。