Choosing this model
GL400F selection guide
Choose GL400F when higher listed gain and a narrower horizontal beam matter more than antenna length. Compared with GL401D, its gain rises from 13.8 to 15.7 dBi, while the horizontal beam narrows from 26° to 14°; allow for a more specific pointing requirement.
GL401D is the shorter option: 1.2 m versus 2.0 m. If installation length is the limiting factor, compare that model before choosing GL400F. Keep operating range and bandwidth separate when checking the required frequencies.
