A dual-band high-gain linearly polarized antenna for wideband operation using a defective frequency selective surface (DFSS) is proposed and demonstrated experimentally. The designed antenna consists of radiating patch, truncated ground with a half-inverted L-shaped rectangular ring and frequency selective surface (FSS) with a defective ground plane. The dimensions are optimized to achieve dual band with a 10-dB impedance bandwidth of 7.72% from 2.37 to 2.56 GHz and 46.75% from 4.60 to 7.41 GHz. The antenna gain is enhanced by 8.8 dBi at lower band and 4.5 dBi at upper wideband. The maximum gain achieved using this technique is 8.8 dBi at 2.4 GHz. The measured and simulated results of the proposed antenna are well-matched in terms of gain, reflection coefficient (S11) and radiation patterns. The Proposed antenna is easy to implement, low cost, low profile and can be used in wireless services like Wi-Fi, Wi-MAX and C band applications.

提出并通过实验证明了一种用于宽带操作的双频带高增益线性极化天线，该天线使用有缺陷的频率选择表面 (DFSS)。设计的天线由辐射贴片、带有半倒 L 形矩形环的截断接地和带有缺陷接地平面的频率选择表面 (FSS) 组成。尺寸经过优化以实现双频带，10-dB 阻抗带宽从 2.37 到 2.56 GHz 为 7.72%，从 4.60 到 7.41 GHz 为 46.75%。天线增益在低频段提高 8.8 dBi，在高宽带提高 4.5 dBi。使用此技术实现的最大增益为 2.4 GHz 时的 8.8 dBi。建议天线的测量和仿真结果在增益、反射系数 (S11) 和辐射方向图方面非常匹配。建议的天线易于实施，成本低，