An inexpensive low power VHF/UHF "Stelth" base antenna is the Comet CH-32 "Miricle Baby".
A very small HT antenna (1.5 inches in diameter at 1 3/4 inches high) rated at 8 watts with BNC connector, sells for $30 at DX Engineering.
With adapters I connect the CH-32 to my Icom DStar transciver set at 5 watts output.
I operate DStar, DMR, and YSF with my Shark Openspot 3 without any problems.
SWR at 5 watts DV is less than 1.5.
Perfect antennas for HRO, apartments, military base housing, camp sites, decks, back yards ect.