Air1220 1 antenna

[ddicky]

Can I use only 1 external antenna AIR-ant4941 on ap1220 to make it run?

[dave.reid]

Yes, you can. When doing so, you give up diversity reception, which MAY introduce problems due to multipath fade.

[thisisshanky]

Infact, the use of two antennas is to provide diversity so that multipath fading effects can be avoided. You will not get diversity with one antenna. Still it should work.