Discussion
What does a T match differ from a gamma match in?
Answer: B
A T match is the balanced version, tapping symmetrically either side of the centre, and it needs a balun where a gamma match does not. Both use series capacitors to cancel the tap inductance. Neither is restricted to a folded dipole, and neither gives a fixed transformation ratio, since the tap position sets it. Symmetric and asymmetric versions of the same idea recur throughout feed design, and the choice usually turns on whether a balun is wanted anyway.
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