Now we can draw some circles on Smith chart. Third, the normalized load impedance, which is also a complex number, can be expressed by the reflection coefficient.įourth, after rationalizing, the normalized load resistance z R and load reactance z I can be expressed by the following two circle equations.įinally, thanks to the author’s derivation, the equations of the two circle can be rewritten in a familiar format. And the load impedance is further normalized to the reference impedance z L=Z L/Z 0. It can be calculated based on a load impedance Z L (using a reference impedance Z 0). Second, this coefficient corresponds directly to a specific impedance as seen at the point it is measured. For details, please click the above link.įirst, the reflection coefficient is a complex number. I extract the main flow of derivations here. However, I am still confused about the exact size and position of the circles until I happen to find this derivation. After reading his slides, I kind of understand that Smith chart is trying to combine the impedance in Z plane with the reflection coefficient in Polar diagram. Enter Load and Characteristic impedances to calculate VSWR and Reflection Coeffecients. You can toggle between Impedance and Admittance charts. Delssperger and he also develops a handy software to help us with matching and etc. click anwhere inside the chart to see the corresponding circles. I can find lots of reference on Smith chart online, among which one of the most useful one is explained by Prof.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |