Yes, a 2-Bay antenna can be fed from one end (HF Arrays do this all the time).
Note the need for a Feedline CROSS-OVER, presuming standard 2-Bay spacing,
without it there is a Big Gain Hole mid-band. [I edited a 4-Bay 4nec2 model.]
Compare to standard 2-Bay...End Fed with Cross-over had slightly higher Gain
and slightly better SWR < 2.2 vice < 3.0. Hmmm, but I used slightly different
Other than waving our arms about "phasing" lengths in the feedline (valid only
at one frequency!!!!), it is very difficult to adequately explain multi-element
antennas, since the mutual coupling between the elements is an important effect.
Which is why NEC modeling is essential to calculating actual broadband results....
Consider a Yagi antenna....it's Freaking Magic ("FM") to realize Gain by simply
placing (usually grounded) rods in front of the active dipole radiator......huh???
And to adjust SWR, place an additional rod close to the dipole...say what???
UHF_2-Bay_9.5x9_BowSwp=0.0in_NO_Refl_FeedSep=1.5in.nec.doc 28k . file
End-Fed-Xover_UHF_Super-2-Bay_9.5x9.0_NO_Refl.nec.doc 30k . file