One thing I've done on occasion, and it seems to work fine, is to run the antenna along the base of the fuselage then cover it with matching covering. What I did was make a small hole in the fuselage just aft of the wing saddle, then make a strain relief to pass the antenna wire through. I pull the wire through this strain relief and anchor the antenna wire inside the fuselage somewhere that it will be out of the way of linkages and servo movements. Then I put a very slight dab of CA on the antenna wire right at this strain relief where the antenna passes through on the outside.

I cut a length of covering to match the bottom of the fuselage.. or you can use contrasting colors for appearances if you wish. I stretch the antenna wire straight, right down the center of the bottom of the fuselage then hold it down on the rear with a piece of tape, then iron the covering right over the antenna wire all the way back to the rear.

It hides the antenna, yet does not give any problems with any sort of blockage or that sort of thing. Looks neat too.

CGr.