hi everybody

i want to deply omni anteena with 433 router .
so can i configure the omni as access point.
is there any compaibility problem,what omni should i use with 411 or 433 board (in 2.4)

You do not need any antenna compatibility.
Remember RB411 is CPE device and it supports mode=bridge not mode=ap-bridge.
Make sure wireless card used frequency is within the range of used antenna active frequencies.