I have no idea how your second post in this thread relates to your
first one, but...

If you want any sort of sensitivity for 16 receivers tied to the same
antenna, especially in the UHF range (where even with a single
receiver, the receiver noise is likely going to dominate over the noise
the antenna picks up), you should put a decent preamp on the antenna.
The power from the antenna, best case, will divide among the receivers.
In the real world, you'll loose some additional power in the system
you use to split the power among the receivers. Just tying them all
together is about worst case. It would be reasonable to look for a
preamp with perhaps 15dB gain, and in fact you could find a
distribution preamp that will divide the signal for you and give you
more-or-less isolated outputs. One way they do it is to have an input
amplifier, say a 4-way splitter, and then another amplifier on each of
those splitter outputs, each of those driving another 4-way splitter.
That generally gives better performance with respect to distortion and
noise.

If you're only dealing with large signals, you could try just a simple
splitter arrangement, but don't expect good sensitivity in the
recievers.

Cheers,
Tom