No resistors

smithg1circle3

Of course, you are not going to add any resistors, I understand. For example, if I add a 25 [ohm] resistor in series to the antenna, moving from the red point to the pink point, the impedance becomes Z=50+j50 [ohm], or z=1+j1, and we are on a green circle, but that is not what you recommend to do.

No, there are two ways, but both does not use a resistor.