- 易迪拓培训,专注于微波、射频、天线设计工程师的培养
hfss中天线增益的定义问题
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小弟在学习hfss仿真微带天线时，遇到一个棘手问题:Gain和Realizedgain的区别。看了一下help文件还没弄明白，所以特请教高手关于这两个定义如何理解。先把HFSS中相关定义附下：
Gain is four pi times the ratio of an antenna’s radiation intensity in a given direction to the total power accepted by the antenna.
Realized gain is four pi times the ratio of an antenna’s radiation intensity in a given direction to the total power incident upon the antenna port(s)
Gain is four pi times the ratio of an antenna’s radiation intensity in a given direction to the total power accepted by the antenna.
Realized gain is four pi times the ratio of an antenna’s radiation intensity in a given direction to the total power incident upon the antenna port(s)
Gain 不考虑端口驻波影响
Realized gain考虑端口驻波影响
HFSS里面，对于GAIN，是用4*pi*U/Pacc，Pacc字面上理解就是端口从激励源接受的功率，而realized gain用的是Pincident，就是全部的入射功率，当端口共轭匹配的时候，Pacc就等于Pincident,实际不可能做到完全匹配，所以Pincident始终是大于Pacc的，所以，看方向图的时候，realized gain比gain小。
申明：网友回复良莠不齐，仅供参考。如需专业解答，请学习易迪拓培训专家讲授的HFSS视频培训教程。
