准八木微带天线是一种结构变形的平面八木微带天线,具有较好的性能,但其带宽性能还不能满足实际应用需要。为了实现天线的超宽带性能,采用能有效地展宽天线带宽性能的蝶形振子作为激励振子等设计方法,研究出了一种新型天线。使用电磁仿真软件Ansoft HFSS对该天线进行了优化设计、仿真实验,并制作了实物天线,进行了测试。实测结果表明,该天线在中心频率2. 4 GHz处具有39. 6%的相对带宽(VSWR<2)和较好的方向图性能。

The Quasi-Yagi microstrip antenna is a structure deformed planar Yagi microstrip antenna with good performance, but its broadband character still can’t satisfy in the application requirment. In order to get the UWB(Ulter Wide Band) antenna character, a new antenna is researched, that the bow-tie element is used as the driven element to broaden the bandwidth of the antenna.The new antenna is simulated and optimized by the EM simulation software Ansoft HFSS, and its practical object is fabricated,then it is tested by instrument. The measured results show that the antenna has better performance of relative bandwidth as great as 39. 6%(VSWR<2) at the operational frequency 2. 4 GHz, and the good patterns.

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