Design curves for self-resonant U- can be easily obtained
by setting the height and then iteratively tuning the
width to have the antenna at resonance. For example,
Fig. 2 shows the tuning curves for copper wire U-MLAs where
the method of moments [4] has been used for antenna modeling.
As expected, higher order antennas (N 1) have a smaller resonant
width since the wire is folded along a greater number of
turns within a small area. Moreover, the gain becomes lower for
increasing but approaches the gain of a straight dipole as the
height increases.