I'm currently of the opinion that swr is a (mildly) bad tag.
The reason is that it rarely describes what the question is actually about; rather, the asker has some other problem and a high SWR reading is evidence of the problem. It's like tagging an electronics question with "voltage" — it usually isn't specific enough.
Therefore, I — have already retagged a bunch of swr questions, and created two new tags:
- impedance-matching for questions like how to make a 3-way coax splitter, or in general impedance matching networks and the need for matching.
- We already have antenna-tuner for adjustable matching networks.
- swr-meter for questions like how a crossed-needle display works.
I'd like to eliminate the tag entirely (perhaps arrange so that we have swr-mismatch → impedance-matching for the benefit of tag completion) but I am less certain that this is a good idea, so speak up if you have a proposal or argument on the subject.