Originally Posted by jsncrso
I was thinking of each antenna having it's own band filter then running into a multicoupler. Is this the best way to do that?
Yes. That would be the best way to do it. If you need to over come the loss of the splitter/combiner, the right way of doing it would require two preamps, one after each filter, and before the splitter/combiner. Since you want both UHF and VHF on the discone, a low pass filter with a cutoff of 470 MHz (or 520 if you want T-Band) and a bandpass filter for 800 would work.
A "multicoupler", btw, is generally understood to be a single input (antenn system) and multiple outputs to more than one receiver. What you want is a "splitter/combiner" which is passive and bi-direction, depending on how it's hooked up.
A multicoupler with gain is useless. The the degradation of noise figure from the filters and the splitter cannot be recovered. Putting preamps between the filters and the splitter/combiner is most effective way of eliminating losses.