Anything will do:
- Wound balun (transformer). Has to be pretty small due to the wavelength = poor power handling (good for rx?). Provides any impedance match you want, too.
- 1/4 wave transformers (not transformers in the traditional (wound) sense): same thing, narrower bandwidth; requires some design to realize. Downside: you probably don't have exactly the right impedance transmission line to make one.
- Gamma match: the dipole is one continuous rod, with the shield grounded to the middle of it. Signal is tied to a short arm, which attaches to one side of the dipole, close to the middle. The loop made by this arm couples into the field of the full dipole. There may be some residual line current, because the system isn't perfectly symmetrical after all.
- Direct connection plus current choke: a current choke can never null the feedline current, so there will always be residual, and that should be shunted to a large ground plane before connecting to the transmitter. Radiation pattern will be skewed as a result. The direct connection gives poor matching, but can be tuned out (give or take feedline losses, mind -- coax is relatively bad at that, compared to twin lead, say), if you don't mind narrower bandwidth in the process.
- Not giving a shit: no impedance transformation or balancing; shield current is terminated to the nearest ground, and the radiation pattern and impedance mismatch is just whatever it is. Commonly seen in wifi patch antennas in consumer equipment.