On 10/28/20 3:43 AM, Erik Kaashoek wrote:
Forgot the S11 plot of the bad coax
Yes, that's pretty typical for lossy coax - but you're not seeing the coax's impedance changing, you're seeing the terminal impedance changing as as the coax is different numbers of wavelengths long, reflecting back the unterminated far end.
And since the loss increases with frequency, the "mismatch" is attenuated more and more with frequency.
As they say, 100 feet of cheap coax in a bucket of water makes a fine dummy load at UHF.
