Q: 17
What can cause excessive VSWR in RF cables used to connect a radio to an antenna?
Options
Discussion
D . Impedance mismatch is what actually causes high VSWR, not antenna gain or radio power. A and C trip people up but they're just about directionality, not reflections in the cable. Pretty sure D is the only right one, correct me if I missed something though.
D . Only impedance mismatch actually causes high VSWR in RF cables, not the antenna type or output power. Anyone disagree?
Anyone use the CWNA-109 official study guide for topics like this? I found it really clear on VSWR basics and causes.
D is the one. Excessive VSWR comes from an impedance mismatch between components, not antenna gain or radio output. Saw something like this in a practice set and the explanation was super clear for once!
Why not C? High gain dish doesn't cause VSWR, it's just about mismatched impedance, right?
Option C could be tempting since parabolic dish antennas are big on gain, but that doesn’t actually cause VSWR in the cable. Thought it was a trap-it’s really about impedance mismatch (D), but I can see how C gets picked sometimes.
Impedance mismatch for sure, so D. Antenna gain or radio power don't actually impact VSWR in the cable like that. Agree?
Yeah, definitely D
Feels like D right here. High gain antennas (A, C) trip people up but they don't actually cause VSWR issues, it's the impedance mismatch in D that does. Easy to mess up if you're not focused on matching impedance specs. Seen this catch people in practice sets too.
Had something like this in a mock in the official study guide, thought it was A for a second.
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