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为了提高常规Vivaldi天线低频段前向辐射增益,避免超宽带天线对某些已有频段的影响,提出了一种覆盖1.2~14 GHz的具有陷波特性的高增益超宽带端射天线。该天线通过在辐射贴片两侧加载Y形缝隙,有利于天线表面电流向槽线汇聚,使天线的辐射特性明显提高。低频部分(1.2~7.5 GHz)的增益比原始天线提高最多2d B,通过使用CSRR结构,实现了对WLAN应用频段(5.125~5.825 GHz)的隔离,使该天线具有陷波特性。最终,对天线实物进行加工和测试,进一步验证了设计的可靠性。
In order to improve the low-band forward radiation gain of the conventional Vivaldi antenna and avoid the influence of the UWB antenna to some existing frequency bands, a high gain UWB antenna with a notch characteristic of 1.2-14 GHz is proposed. The antenna through the radiation patch on both sides of the load Y-shaped gap is conducive to the antenna surface current converges to the slot line, so that the antenna radiation characteristics significantly improved. The gain of the low frequency part (1.2 ~ 7.5 GHz) is increased by up to 2d B compared with that of the original antenna. By using the CSRR structure, the isolation of the WLAN frequency band (5.125-5.825 GHz) is implemented, so that the antenna has a notch characteristic. Finally, the actual processing and testing of the antenna further verify the reliability of the design.