一种双阻带椭圆单极子UWB天线的设计

摘要

通过仿真与实际测试结合的方法，研究并设计了一种用于UWB通信的、具有双阻带特性的紧凑椭圆单板子天线。双阻带特性是通过在辐射单元上插入一个缝隙和在馈线上引入一共面波导谐振单元实现的。测试结果表明此天线在3．45．3．75GHz（覆盖了WIMAX频段）和5～6GHz（覆盖了5．15～5．85GHz的WLAN频段）分别有两个阻带，此外．驻波系数在3．1—10．6GHzUWB的范围内小于2。天线的辐射特性也近似于全向。天线的增益和传输函数也证实了天线能达到双阻带特性。%Using the combining with simulation and test, a novel compact elliptical monopole uhra-wideband antenna with dual notched bands for UWB communication is proposed and investigated.The dual-notched characteristic is realized by an elliptic arc-shaped slot ins-erted in the elliptical monopole and a compact coplanar waveguide resonant cell in the feed line. The measured results show that the frequency band of VSWR 〈2 covers 3.1 to 10.6 GHz UWB band, while the notched frequency bands are 3.45-3.75 GHz which covers 3.5 GHz WIMAX and 5-6 GHz which covers 5.15-5.85 GHz WLAN band, and the two notchedbands are separately achieved. The proposed antenna.has a monopole-like radiation patterns. Gain of the proposed antenna and transfer function study show that dual bandnotched characteristics achieved which conforms with the results of VSWR.