一种小型化双陷波可重构UWB天线设计

提出了一种小型化的双陷波可重构超宽带(ultra wide band, UWB)天线，通过在辐射贴片上刻蚀大、小两个C形槽，实现5G (3.3~4.4 GHz)/WiMAX (3.3~3.6 GHz)和WLAN (5.150~5.825 GHz)两个频段的陷波. 采用两个PIN二极管跨接在C形槽上，通过控制PIN二极管的通断状态，在两个频段上实现陷波可重构. 为了实现小型化，天线采用削顶圆形结构的辐射贴片，并将C形槽设计为嵌套结构，天线最终尺寸为18.0 mm×19.5 mm. 仿真与测量结果表明:天线可以在UWB、两种单陷波和双陷波共四种状态下工作，UWB频段为3.1~11.0 GHz，两个单陷波频段分别为3.2~4.9 GHz、5.2~6.0 GHz，双陷波频段为3.25~4.75 GHz和5.3~6.1 GHz. 天线的最大增益为2.8 dBi，具有良好的辐射特性.

A miniaturized UWB antenna with reconfigurable dual band notch characteristics

In this paper, a miniaturized ultrawideband (UWB) antenna with dual reconfigurable band notch characteristics is proposed. Band rejections at 5G (3.3?4.4 GHz)/WiMAX (3.3?3.6 GHz) and WLAN (5.150?5.825 GHz) are obtained by introducing two C-shaped slots on the radiating patch of the antenna. Reconfigurable dual band notch function is achieved by integrating two PIN diodes on the slots. By etching a nested structure of C-shaped slots, an efficient top-cut circular-shaped radiating patch is designed, which realizes a compact size of 18.0 mm×19.5 mm. The proposed antenna operates in 4 states in the case of common interference scenarios. The simulated and experimental results show that the bandwidths of notch bands in single band notch states are 3.2?4.9 GHz and 5.2?6.0 GHz respectively, while the bandwidths of notch bands in dual band notch state are 3.25?4.75 GHz and 5.3?6.1 GHz. The antenna also exhibits a good radiation pattern with a maximum peak gain value of 2.8 dBi. dBi.