具有双带阻特性的超宽带缝隙天线

设计了一款微带馈电的超宽带缝隙天线,整体尺寸仅有30 mm×30 mm×1.6 mm,在3.08～11 GHz范围内驻波比小于2,可覆盖超宽带频段.为了实现对WiMAX和WLAN频段的陷波,分别在地板和馈线上蚀刻不同缝隙,仿真结果表明:在3.2～3.7 GHz,5 ～5.9 GHz驻波比大于2,增益显著下降,而在通带内仍然保持良好的全向辐射特性和稳定的增益.该天线结构简单、性能优良,能广泛应用于超宽带通信系统中.

UWB Slot Antenna with Dual Band-Notched Characteristic

A microstrip-fed UWB slot antenna is designed, whose overall size is as small as 30mm×30mm×1.6mm.The voltage standing wave ratio (VSWR) of slot antenna is less than 2 over the frequency range of 3.08~11GHz, covering the whole range of UWB. Two kinds of slots are embedded into the ground plane and feed line to achieve dual band-notched characteristic in the frequency band of WiMAX and WLAN. The results of simulation show that the VSWR is greater than 2 in the frequency range of 3.2~3.7GHz and 5~5.9GHz where the gain decrease sharply, meanwhile this proposed antenna demonstrates almost omnidirectional radiation patterns and stable gain across the whole operating bandwidth. The band-notched antenna has a simple configuration and good performance, so it can be used in UWB communication widely.