ABSTRACT

In this paper, a low-profile, compact hexa-band pattern reconfigurable antenna is presented. The proposed antenna consists of a square patch fed by a microstrip line of 50 Ω and a ground plane. The ground is loaded with a pair of the split-ring resonators and two rectangular slots that offer multiband operation and pattern reconfigurability. On the top surface of the antenna, two diodes (D1 and D2) are introduced to control current distribution and to achieve pattern diversity. The antenna operates at 2.4 GHz, 3.8 GHz, 4.35 GHz, 4.7 GHz, 5.5 GHz, and 6.25 GHz, with impedance bandwidth in the range of 1.01% to 4.09%. Depending upon the state of operation, the gain of the proposed reconfigurable antenna varies from 1.90 dBi to 2.82 dBi and pattern tilt of ±10^° at 3.8 GHz, ±45^° at 4.35 GHz, ±25^° at 4.7 GHz, ±45^° at 5.5 GHz, and ±45^° at 6.25 GHz is observed. The prospective antenna is fabricated and practical inferences are compared with the simulated results. The experimental outcomes are found in good agreement with the simulated results, which validates the beam steering capability of the antenna.

摘要

在本文中，提出了一种低剖面、紧凑的六波段模式可重构天线。建议的天线由一个由 50 Ω 微带线馈电的方形贴片和一个接地平面组成。地面装有一对裂环谐振器和两个矩形槽，可提供多频段操作和模式可重构性。在天线的顶面上，引入了两个二极管（D1 和 D2）来控制电流分布并实现方向图多样性。天线工作频率为2.4 GHz、3.8 GHz、4.35 GHz、4.7 GHz、5.5 GHz和6.25 GHz，阻抗带宽范围为1.01%至4.09%。根据操作状态，建议的可重构天线的增益从 1.90 dBi 变化到 2.82 dBi，方向图倾斜在 3.8 GHz 时为 ±10 ^°，±45 ^°观察到在 4.35 GHz、±25 ^°在 4.7 GHz、±45 ^°在 5.5 GHz 和 ±45 ^°在 6.25 GHz。制作了预期天线，并将实际推论与模拟结果进行了比较。实验结果与模拟结果非常吻合，验证了天线的波束控制能力。