一种新型三角形宽带微带缝隙天线的设计

摘要

A new type of a wideband microstrip antenna is proposed. This design antenna consisted of a triangular-fed microstrip and a triangular-wide slot. The slot is opened at the GND board and the feed is on the other side of the substrate. In order to achieve wideband characteristic, this paper adjests the relatively position of the slot and feed. The triangular antenna size for design is length of 50 mm and height of 1 mm. By HFSS simulation software, the impedance bandwidth, radiation patterns are simulated. The results show that the work bandwidth are over 2. 3 GHz to 4. 3 GHz. Thus the design principles of wideband antenna can be realized.%提出了一种新型的宽带微带天线,其结构由正三角形馈电微带贴片与正三角形宽槽贴片组成.正三角形宽槽开在金属GND板上,而正三角形贴片则置于介质板的另一面并位于三角形宽槽孔的偏下方.通过调节宽槽与贴片的相对位置实现了小尺寸下的宽带性能.设计天线大小为边长50 mm的正三角形,厚度为1 mm.采用HFSS仿真软件分析了该天线的阻抗带宽以及辐射方向图,结果显示该天线的S11参数小于-10 dB的带宽为2.3 GHz～4.3 GHz,有很好的应用前景.