¿ªÔÆÌåÓý

ctrl + shift + ? for shortcuts
© 2025 Groups.io

Re: At which point do we take the value of impedance to tune an antenna?


 

Time is well spent learning a bit about the Smith Chart.

You can plot a complex impedance and then draw a circle that intersects the point and get the SWR. You can also measure the distance and get the reflection coefficient and gamma.

A picture is worth a thousand words so here is a plot on a Smith Chart of several complex impedances that all result in a SWR of 2 and a reflection coefficient of 0.333 ( a Reflection Loss of 9.54 dB). The 40 + j30 from the earlier discussion is one of these.

Roger

Join [email protected] to automatically receive all group messages.