The Spektrum RX's have 2 short antennae, about 3" long. The INSTRUCTION MANUAL says to mount the RX so one antenna is horizontal and one is vertical. That's how all of mine are installed, with the antennae held in place with a bit of blue tape. I have never had a problem with reception. And BTW, I install RX's and ESC's on a spot of Velcro, which makes it easy to remove them if necessary, and provides a little vibration damping.