A return loss of 14.6 dB represents a VSWR of 1.46:1. It is the one place where the number sequence is the same, so it is a good mnemonic reference for relating VSWR to return loss. That's all.
Try it for your self on the VSWR <--> Return Loss Calculator
These items are an archive of past Topical Smorgasbord items that have appeared on the RF Cafe homepage. In keeping with the "cafe" genre, these tidbits of information are truly a smorgasbord of topics. They all pertain to topics that are related to the general engineering and science theme of RF Cafe. Note: There is also a huge collection of my 'Factoids' (aka 'Kirt's Cogitations') that might interest you as well.