I looked through a bunch of permits and they use a variety of antennas over the years. The most common in recent years are the Commscope FFHH-65C-R3, Commscope SBNHH-1D65B, and Nokia AAFIA. Usually, the Comscope FFHH and Nokia AAFIA are used together. I included the ones I encountered in some quick searches below. I have also included links to pages or pdfs which show the antenna.
TMZXX-6516-A2M - 2 port: 1710-2155MHz (B2, B4, B66?) HBXX-6517DS-A2M - 4 port: 1710-2180MHz (B2, B4, B66?) SBNHH-1D65C - 6-port: 2x 698-896Mhz (B5, B12) and 1695-2360Mhz (B2, B4, B66) FFHH-65C-R3 - 8-port: 4x 617-806Mhz (B12, B71) and 4x 1695-2460Mhz (B2, B4, B66)
Nokia: AAFIA - 16T16R - B25 and B66
Are there distinct antennas for band 14 deployment? There's a new rack going up with new kinds of antennas here in Grand Forks. The antennas are approximately the same size as T-Mobile's 600MHz antennas but it's not those.
When they turn off the band 41 backhaul then Maybe I will hook it up to my home network. Meanwhile it will stay on it. Hopefully T-Mobile optimizes their network to pick the best connection instead of switching to T-Mobile when the Sprint network has no service as it does now.