This is a spacer for using Smiley antenna on TIDRADIO TD-H8. The spacer keeps the radio metal parts out of the element, provide more support when pressure is applied to the antenna to bend it. With this spacer, you don't need the rubber washer/gasket that comes with your Smiley antenna.
There are three designs included: spacer with no text and spacers with extruded and sunken text of "TD-H8" and "Smiley". If you don't want all three, just select and delete the objects you don't want on the plate.
This was test-printed on Bambu Lab X1 Carbon with textured PEI plate, 0.24 default layer height. Variable layer height is enabled. Support is enabled only for the base. Support for the extruded or sunken letters are not needed, if you choose to print with those.