Hi, I am currently guessing if it makes sense to use one good antenna for two devices with a y-cable. I have a ogn/flarm receiver (RPI+rtlsdr) and a ttn indoor gateway with sma connector. While the ogn-receiver only receives packets the indoor gateway transmitts as well and I am afraid that the rtlsdr-stick will be damaged when the gateway transmitts. Both uses the same frequency and I don’t want to buy and install two antenna cables and antennas outside if one would be sufficient.
Hi Zodiac,
That is not easy. If you use an "Y"cable the transmitter of the gateway will destroy your flarm-receiver. Using a splitter, both devices can receive at the same time using the same antenna with a loss of about 3dB. But when transmitting, the receiver has to be protected against excessive power eg. by an antenna switch or a circulator (isolator).
Yes, that sounds reasonable. 3dB is quite a lot, maybe too much for me.
At least a splitter will cost more than a 2nd antenna…
That’s not the primary concern
At least a splitter will cost more than a 2nd antenna…
A splitter is very cheap. But a splitter won’t protect your other receiver from the gateway’s transmission.
Just buy two antenna’s. It can not be combined.