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Q&A What does it mean for a signal to have impedance?

What does it mean for signals to have impedance? To me, impedance is kinda like an "extended resistance" that also includes phase shift $$Z = R + jX $$It makes sense to me that components like cap...

3 answers  ·  posted 1y ago by Carl‭  ·  last activity 1y ago by TonyStewart‭

#1: Initial revision by user avatar Carl‭ · 2023-03-13T19:56:46Z (over 1 year ago)
What does it mean for a signal to have impedance?
What does it mean for signals to have impedance? To me, impedance is kinda like an "extended resistance" that also includes phase shift

$$Z = R + jX $$

It makes sense to me that components like capacitors ($Z_C = \frac{1}{j\omega C}$) and inductors ($Z_L = j\omega L$) have impedances because they **impact** signals, but what does it mean for a signal to have impedance?