關(guān)于安捷倫datasheet中一處輸出阻抗匹配的疑惑～

                    Figure23

這是MGA83563的2.5GHz輸出阻抗匹配的　匹配過(guò)程及實(shí)現(xiàn)，是datasheet中提供的～但不包括紅色部分，紅色部分是自己畫(huà)上去的。原文如下：
　Avago’s Touchstone program was used to interpolate the s-parameter data and calculate a Γml of 0.14 ∠172° for 2.5 GHz.
   This Γml point is plotted on the Smith chart in Figure 23 as
Point C, along with an indication of the area of lower impedance
from this point. (The output impedance is expected to
decrease under large signal conditions.) A two-element matching network consisting of a shunt capacitor and series transmission line is chosen to match the output to 50 ohms.
    Referring to the Smith chart in Figure 23, the initial output match
for Γml was determined to be a 0.4 pF shunt capacitor followed by a 0.32-inch length of 50 Ω microstripline.

首先，把我的疑惑說(shuō)一下：
ａ，我認(rèn)為Ｂ點(diǎn)應(yīng)該在圖中的Ｂ＇點(diǎn)。（至少匹配時(shí)要與r=1圓相交）
ｂ，既然要做并聯(lián)電容匹配，就應(yīng)該做導(dǎo)納變換即Ｃ換到Ｃ＇
ｃ，而且對(duì)微帶和容抗的計(jì)算結(jié)果也有出入，
其次，如果圖中是按導(dǎo)納圓匹配的，也有問(wèn)題，既然是將輸出阻抗匹配到傳輸線，確定微帶線長(zhǎng)時(shí)，怎么逆時(shí)針旋轉(zhuǎn)反射系數(shù)到Ｂ點(diǎn)呢？應(yīng)該是順時(shí)針轉(zhuǎn)到Ｂ＇的、對(duì)應(yīng)的導(dǎo)納點(diǎn)阿。

以上是我對(duì)這個(gè)數(shù)據(jù)手冊(cè)的不解，請(qǐng)網(wǎng)站朋友的幫助。