As pointed out earlier, you have to determine if the two GPS receivers
supply 5V to the antenna, and if the antenna requires 5V (active antenna).
After determining this, the divider must supply both the RF division and
pass through the 5V from one of the GPS (if the antenna is active and gets
its power from the coax)

This is not quite as simple as just hybrid or resistive RF power divider
because of the 5V for the LNA inside of many GPS antennae. More info is
needed on the receivers and the antenna.

Peace,
John Severyn EE
@KLVK


"Tauno Voipio" wrote in message
...
RST Engineering wrote:

Also, to keep impedances correct, the splitter will likely either have to
be lossy, or active.

google "Wilkinson" "hybrid power divider" and "IRE Transactions" before
saying stuff like this.

What's the matter?

To divide the antenna power to several receivers
always means some loss to a single receiver. In
an ideal case, a passive divider to two branches
will show a loss of 3 dB to both branches, and
this means no power loss in the divider.

An active divider can compensate for the losses
with an amplifier.

The division losses always exceed zero if the
impedances are not properly matched, which will
show more than 3 dB in divide to two.

--

Tauno Voipio, avionics engineer
tauno voipio (at) iki fi