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设计了一种可展宽频带的U型切角天线。将U型贴片天线进行切角处理,改变天线的结构与电流路径,可以有效展宽天线频带,并使其具有良好的阻抗匹配特性。采用HFSS15.0软件对天线模型进行仿真分析,对切角的长度、宽度进行优化,给出了天线的反射系数S11与U型槽尺寸和切角尺寸间的关系。结果表明,优化后的U型切角天线覆盖了整个2.4~2.5 GHz频带范围,电压驻波比VSWR≤2的相对带宽为19%,天线增益达到7 dB,波束宽度为83o左右。
A U-shaped chamfered antenna with a wideband can be designed. Cutting the U-shaped patch antenna and changing the structure and the current path of the antenna can effectively broaden the antenna band and make it have good impedance matching characteristics. The HFSS15.0 software is used to simulate the antenna model and the length and width of the chamfer are optimized. The relationship between the reflection coefficient S11 of the antenna and the size of the U-shaped groove and the size of the chamfer is given. The results show that the optimized U-shaped corner antenna covers the entire 2.4-2.5 GHz band, the relative bandwidth of VSWR≤2 is 19%, the antenna gain is 7 dB and the beam width is about 83o.