Q: 2
Return Loss is the decrease of forward energy in a system when some of the power is being reflected back toward the transmitter. What will cause high return loss in an RF transmission system, including the radio, cables, connectors and antenna?
Options
Discussion
C here. Impedance mismatch (option C) is what actually causes signal reflections and high return loss in RF systems, not cable length or antenna gain. Pretty sure about this since it comes up in a lot of practice sets. Let me know if you see it differently though.
C . D is a trap since 1:1 VSWR means perfect match, not high return loss. I've seen similar questions and impedance mismatch is always the culprit.
Seen this in other practice exams. C is correct. Official guide or a good RF fundamentals book will cover impedance mismatch details.
If they instead asked for lowest return loss, wouldn't D be correct since 1:1 means basically no reflected power?
Option C makes sense because a big impedance mismatch in the RF chain bounces power back to the transmitter, causing that return loss. Matching everything to 50 ohms is key. Pretty sure that's right, but chime in if you think otherwise.
Impedance mismatch is classic for causing high return loss. C lines up with both official guides and practice tests I’ve tried. Pretty sure that’s the right call here, but always review the CWNP book if unsure.
Seen this on a similar exam, it's C. Impedance mismatch is what causes signal reflection and high return loss.
B or D. Seen a similar question on some official practice, and the guide talks a lot about VSWR and antenna gain. Could be off but those seem likely from what I remember.
C , D trips people up since VSWR 1:1 is actually good (no reflection). Seen similar on practice where mismatch is what causes the high return loss not the cable length or low-gain antenna.
Its C, VSWR 1:1 (D) is actually the perfect match so that's a distractor. Impedance mismatch always causes high return loss here.
Be respectful. No spam.