Abstract In this paper, a novel compact UWB antenna with variable notched band characteristics for UWB applications is presented. The designed antenna primarily consists of an adjusted elliptical shaped metallic patch and a partial ground plane. The proposed antenna has a compact size of only 17 × 17 mm2. The suggested antenna covers the frequency range from 3.1 GHz to 12 GHz. A single notched band has been achieved at 7.4 GHz with the aid of integrating a novel closed loop resonator at the back plane of the antenna. This notched band can be utilized to alleviate the interference impact with the downlink X-band applications. Besides, a square slot was cut in the loop in order to obtain a variable notched band. With the absence and the existence of this slot, the notched band can be varied to mitigate interference of the upper WLAN band (5.72–5.82 GHz) and X-band (7.25–7.75 GHz) with UWB applications. A good agreement between measurement and simulation results was achieved, which affirms the appropriateness of this antenna for UWB applications.

中文翻译：

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基于闭环谐振器的紧凑型 UWB 天线，具有在 WLAN 和 X 波段之间变化的单陷波频段，适用于 UWB 应用

摘要 在本文中，提出了一种用于 UWB 应用的具有可变陷波频带特性的新型紧凑型 UWB 天线。设计的天线主要由调整后的椭圆形金属贴片和部分接地平面组成。建议的天线尺寸紧凑，仅为 17 × 17 mm2。建议的天线覆盖 3.1 GHz 至 12 GHz 的频率范围。借助在天线背板上集成新型闭环谐振器，在 7.4 GHz 处实现了单个陷波频段。该陷波频带可用于减轻对下行链路 X 频带应用的干扰影响。此外，在环中切出一个方形槽以获得可变的缺口带。随着该时隙的存在和不存在，可以改变陷波频带以减轻上层 WLAN 频带 (5.72–5. 82 GHz) 和 X 波段 (7.25–7.75 GHz) 与 UWB 应用。测量和仿真结果之间取得了很好的一致性，这证实了该天线适用于 UWB 应用。