So, I thought no had the concept of combining 2 different antennas pointed in opposite directions figured out, but I might have been wrong. I have tried to combine two of the same type antennas , with the same length of the exact same coax, but something odd happened. As soon as I counted the secod antenna to the splitter , the other signal became much lower. Why? Shouldn't it have been -4 dB before the second antenna was connected and then stayed that way? Why did the signal drop so much when the second antenna was connected? I ended up using a directional coupler , putting the strongest one on the -8 dB side to make up for the difference.