The proposed antenna presents a dual-band monopole antenna with a wide axial ratio bandwidth, by using the modified ground plane. The tilted inverted L-shaped strip with an angle of α is printed on the FR4-epoxy substrate and is excited by the microstrip feedline. The overall dimension of the proposed antenna is 0.408λ₀ × 0.326λ₀ × 0.013λ₀. The ground plane has been modified by introducing a Y-shaped strip, cutting a slot and connecting a stub for improving the characteristics of antenna performance. The design and simulation have been carried out by the EM simulator HFSS v.15 software. Once the antenna design is completed, the proposed antenna is fabricated and various characteristics are measured. The proposed antenna exhibits two distinct bands along with the percentage impedance bandwidths and axial ratio bandwidths of 75.32% (resonant at 2.35 GHz), 14.26% (resonant at 6.1 GHz) and 55.88% (center at 2.845 GHz), 15.96% (center at 6.075 GHz), respectively. The measured results are experimentally verified with simulated results and a good agreement is found between them. The measured impedance bandwidth, axial ratio and gain are good enough for commercial bands of wireless communication systems such as Bluetooth, Wi-Fi, WLAN, and WiMAX.

所提出的天线通过使用修改后的接地平面，呈现出具有宽轴比带宽的双频单极天线。角度为α的倾斜倒L形条带印刷在FR4-环氧树脂基板上，并由微带馈线激励。所提出天线的整体尺寸为 0.408 λ ₀  × 0.326 λ ₀  × 0.013 λ ₀。通过引入Y形带、切槽和连接短截线等方式对接地面进行了修改，以改善天线性能特性。设计和仿真是通过电磁模拟器 HFSS v.15 软件进行的。天线设计完成后，将制造所提出的天线并测量各种特性。所提出的天线具有两个不同的频带，以及百分比阻抗带宽和轴比带宽分别为 75.32%（在 2.35 GHz 谐振）、14.26%（在 6.1 GHz 谐振）和 55.88%（中心在 2.845 GHz）、15.96%（中心在 2.845 GHz）。 6.075 GHz），分别。测量结果与模拟结果进行了实验验证，两者吻合良好。测量的阻抗带宽，