HFSS中如何顯示輸入阻抗的smith圓圖，以判斷天線圓極化特性

查看天線圓極化的常用方法是看遠場最大輻射方向的軸比AR，一般認為AR<=3dB就認為是圓極化，但是利用HFSS仿真Frequency-AR曲線輸出特別慢。
在《Broadband microstrip antennas》一書中看到可以利用查看天線的輸入阻抗圓圖來判斷其是否產(chǎn)生圓極化波，原文為：Another way to recognize whether the given dimensions are optimum for the best AR is to look at the impedance plot of the antenna. If there is a kink (extremely small loop) in the impedance plot corresponding to the excitation of the two orthogonal modes, it will yield the best AR at the kink frequency. Instead of a kink, a small loop or the absence of the loop in the impedance plot yields poor AR.

是畫s參數(shù)，不是z

以前沒有看smith 圖學習啦

學習啦！很有收獲！

學習中啦！很有收獲呢！