After finding that my calibration on my nano vna was off, I must revisit this review.When properly calibrated, I find that the SWR on this antenna is quite reasonable. SWR is just less than 2 on the VHF side, but very low (less than 1.2 on 440) on the UHF side. Compared to a handful of other antennas, I find that it has the lowest SWR on UHF than any of them.It seems that this antenna does make a difference on the UHF side, at least on DMR. VHF doesn't seem to be quite as strong though.I will saSee full review