QUOTE(deadravel @ Jun 24 2014, 03:52 PM)
my house is 3storey bangalow, my wifi modem on 2ndfloor, my unifi 20mb de.
i ady buy new asus wifi router with 9db antenna,
but my 1st, 3rd floor receive wifi signal only 1signal
and the speed only 2mb maximum. shitty signal
that wifi antenna 2400MHz omni-directional type can help?
when u have stock or any other place u recommend me to find this product?
the 9dbi wifi antenna bundled with asus router already omni type (precise term: omni-directional)
omni antenna coverage pattern is a donut shape, not a ball shape.
a low dbi omni antenna say 5dbi , its donut shape is horizontally shorten, vertically widen, like those dunkin donut. a high dbi omni antenna say 9dbi, its donuts shape becomes horizontally expanded, vertically flatten, quite become a like a pizza. so u should able to imagine that.
so put that scenario under multi-storey environment usage, the floor where the 9dbi antenna put on will get much wider horizontal coverage compared to 5dbi (same floor), but vertically (upper and lower floor) will be getting less coverage now.
so yup, as forumer recommneded to you, get a wifi repeater at weak spot or use powerline homeplug with wifi output.