I have a radio transmitter (for my quadcopter) and I wanted to improve its range. So for now I removed its integrated antenna and I soldered a male sma connector so I can plug in any antenna I want. I was thinking to add one more antenna. Keep in mind that the transmitter has only one antenna. So adding a second antenna will be something like this:
Basically the second antenna will be connected to the first one. I would like to know if adding the second antenna will be better, worse or simply the same.