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Old August 1st 06, 12:22 AM posted to rec.radio.amateur.antenna
[email protected] jgboyles@aol.com is offline
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First recorded activity by RadioBanter: Jul 2006
Posts: 58
Default Reflection on Resistive loads


Bob Agnew wrote:
I haven't taught this subject at the University level for a few years now,
so my terminology is a little rusty. VSWR = (1 + abs(rho))/(1 - abs(rho))

When the reflection coefficient rho is +/- 1 the VSWR is infinite. When rho
= 0 the VSWR is 1:1. A VSWR of 1:1 corresponds to the unit circle at the
center of the Smith Chart.


Hi Bob, I have never taught at the University level myself, this is an
"Amateur" newsgroup. If you look at the Smith Chart, 1/2WL reflects
back the identical load impedance, no matter the transmission line
characteristic impedance (neglecting losses). If you have a 1/2WL 600
ohm line driving a 50 ohm load, then you have reflections (SWR), but at
the source end, you see 50 ohms (V and I in phase).
73 Gary N4AST