I am looking for a formal proof for the spiral locus of an impedance when increasing the frequency.
Can anybody refer to somewhere it is proved?
Any book or formal suggestions will be great. I didn't find it in the basic microwave engineering books.
I know that some impedances show a rotation in s-plane, but not necessarily a spiral. Others have fixed coordinates or move linearly. So obviously you have to specify a class of impedances with the claimed behaviour.
I know that some impedances show a rotation in s-plane, but not necessarily a spiral. Others have fixed coordinates or move linearly. So obviously you have to specify a class of impedances with the claimed behaviour.
That's right. I was referring to a RL-series circuit connected through a transmission line. The "spirals" previously discussed in this threads are only possible with additional delay.