一种新型小尺寸三陷波超宽带天线设计

文中提出了一种新型小尺寸具有三陷波特性的UWB天线。所设计的天线基本几何结构由50 Ω馈电线、圆形辐射贴片、缺陷地和一对开口谐振环组成，通过在天线的圆形辐射贴片上内嵌一对Y型贴片、地板上蚀刻出U型贴片和一对开口谐振环实现三陷波特性，天线的尺寸为30 mm×30 mm×16 mm。仿真和测试结果表明，该天线29~107 GHz的频段内回波损耗＜-10 dB,在37~42 GHz、515~5825 GHz和79~84 GHz3个频段内具有陷波特性，分别有效抑制了C频段的卫星系统、WLAN系统和X频段卫星系统对超宽带系统的干扰。在除3个阻带频段外的其余UWB工作频段范围内，有着良好的辐射方向特性和稳定的增益。仿真结果和实验结果表现出了良好的一致性。

Design of a Novel and Small Size UWB Antenna With Triple-Band Notched Characteristic

A novel and small triple-band notched UWB antenna property is proposed. The proposed antenna that composed of a circular patch, a defected ground and a pair of split resonant rings fed by 50Ωmicrostrip. The triple rejection is achieved by etching an annular ring radiating patch with a pair of Y-shaped resonant elements that are embedded inside the patch, a U-shaped patch on the ground and a pair of split resonant rings. The fabricated antenna has a tiny size, only 30 mm×30 mm×1.6 mm. The experinental and measured results show that the proposed antenna exhibits an impedance bandwidth over an ultra-wideband frequency range from 2.9 to 10.7 GHz with return loss less than -10dB, except three stopbands at 3.7~4.2 GHz, 5.15~5.825 GHz and 7.9~8.4 GHz for filtering the C, WLAN and X band signals respetively. It also demonstrates a nearly omnidirectional radiation pattern and a stable gain. The simulated results are compared with the measured performance and show good agreements．