提高pifa天线带宽有哪些方法？

让汇入点的面积尽量大,接地点要和汇入点在平面接合时有一定的平面距离.天线在路径上不要绕太多的圈子.个人的一点看法.如有讲错请指正.

楼主,这个问题偶提过N次了!都没有人回答!一般的最可靠的方法增加线宽,增加天线与地的距离.

关键是要让表面电流尽量分布均匀!

就手机来说，PIFA的高度是影响带宽的关键因素，多增加一个接地点也可以增加带宽。

一种走线的频宽不理想的时候,改变走线也有可能改善频宽的

PIFA bandwidth can also be enhanced by changing the shape of ground plane, there is a small trick of clearing the groundplane below PIFA patch, it is done correctly, the bandwith will be increased due to the increase in electrical volume of the antenna.

合理使用匹配,合理使用发射体之间的耦合会有所帮助.

不同的Pattern，对应的地形状很难研究啊，可否指教一二，谢谢！

The groundplane shape is very much dependant on your PIFA patch shape, and also your feed and ground plate location, the main idea is to increase the electrical volume of the antenna body by allowing the field to travel a longer distance from the patch to the ground. So the area of clearance should not exceed a limit where the field path is weaken or distorted. As in how to find out the optimum clearance area, i think it is very much up to the engineer to either simulate or physically change the cutting of groundplane in order to acheive best result.

天线在路径上不要绕太多的圈子同意，我的理解是这样做不要将天线的能量集中起来，那样辐射不出去，而且带宽也很低。基于以上idea，98年有人提出用3D transmission feeding methon. This method could provide a 95% bandwidth. Recently, Prof. C. H. Chan proposed a feeding methond, folded patch. This could also can provide a broaden bandwidth. In this reply, my view is thatin addition to increasing the height of PIFA, changing the feeding method could also provide wide bandwidth.

以更改天线走线的方式搭配匹配，就比较能达到想要的频宽，通长是高频段的比较简单，因其高频的Smith所形成的圈最小，低频则反之。可如果低频的Smith的圈在第一像现则另当别论。

申明：网友回复良莠不齐，仅供参考。如需系统了解手机天线设计，可以学习业界专家讲授的手机天线设计培训教程。