[Repeater-Builder] 2 digis into 1 antenna

[asterios]

it is possible and if it is how can i use one dual band antenna vhf/uhf with 
two aprs digipeaters at the same time???   first aprs digipeater 1200bps 
144.800mhz second aprs digipeater 9600bps 438.100mhz!!   it is possible??? two 
tranceiver in differend band with one antenna dualband?? thanx