The GPS312 from INSTOCK Wireless Components is a GNSS Splitters with Frequency 1 to 2 GHz, Input Power Splitter: 15 to 30 W (In-Phase), 0.75 to 30 W (Out-of-Phase), Combiner: 3 X 10 W (In-Phase), 3 X 0.25 W (Out-of-Phase), Insertion Loss 0.6 dB, Isolation 22 to 30 dB. Tags: Module With Connectors, Wilkinson. More details for GPS312 can be seen below.