一种新型的双陷波UWB天线研究与设计

Design of Novel Double Band-Notch Ultra-Wideband Antenna

为了有效地抑制窄带信号对超宽带系统的干扰,设计了一种新型双陷波平面超宽带天线,地板采用新型的缺陷地结构来扩展带宽,并通过在八边形天线的辐射贴片上加载互补开口谐振环、在馈线上开U形缝隙,使得天线在3.7～4.1GHz和5.1～5.9 GHz频段内实现双陷波特性。分析了实现天线陷波的原理,研究了天线的尺寸参数对陷波的影响,并对所设计的天线进行了实物加工和测试。结果显示,该天线能够有效地抑制卫星C波段和无线局域网系统的干扰,远场方向图和增益特性良好,在整个超宽带系统工作带宽内具有较好性能,是一种能广泛应用于超宽带系统的新型超宽带天线。

A novel type of planar ultra-wideband（UWB）antenna with double band-notched characteristics was de- signed to effectively minimize the interference of narrow band signals. The original work included： the new defected ground structure （DGS）is used to widen the bandwidth;the octagon radiating patch and the fed line are loaded with a complemen- tary split-ring resonator and a U-shaped slot, respectively, to achieve the double band-notched characteristics within the frequency range between 3.7 - 4.1 GHz and 5.1 - 5.9 GHz. The mechanism responsible for band-notched antenna was discussed, and the influence of antenna geometry on the notch band was evaluated. The newly-designed, prototyped anten- na was fabricated and tested. The test results show that the newly-developed antenna is capable of restraining the interfer- ence of both the C-band satellite communication and local wireless network. In-addition, the small sized antenna has good characteristics of radiation patterns and gain curve.