On JET the coupling resistance averaged over the four straps of the A2 antennas in the Mark II GB divertor configuration was analyzed with particular emphasis on the plasma shape dependence. The measured values were compared with models for the coupling resistance of different levels of sophistication with the ultimate goal of supplying recipes on how to improve the coupling. For a given frequency and given plasma mode (L, H, etc.) the midplane distance between the antenna and the last closed flux surface was found statistically to be the most important element. The shape dependence itself was not pronounced. However, the statistical nature of the analysis does not preclude that the loading in any given discharge can be improved by slightly modifying the shape. In first experiments CD 4 gas puffs showed a 12% increase in loading of those antennas with field line connection to the gas valve.