It Still Doesn't Work

I re-measured and cut new wire and added a ground grid (a four-foot square of chicken wire) and it still doesn't work. The way that it appears to not work is interesting, so I'm recording it. The feedpoint impedance is very small. I was expecting about 100 ohms, and it's less than 20 ohms from 24.682 MHz to around 30.508 MHz and at most of the frequencies in the range, it's less than 10 ohms. I also discovered that I needed to disconnect the resonator from the ground plane to get those numbers. The simulations all connected the resonator to the ground plane.

The results of the actual test:

Frequency (MHz) Rs (Ohms) Xs (*i Ohms) SWR (R0 = 9 ohms)
24.682000 2.000000 51.000000 149.215521
24.992000 2.000000 48.000000 132.714687
25.504000 3.000000 42.000000 68.652100
25.996000 4.000000 36.000000 38.668584
26.505000 5.000000 30.000000 22.310734
27.007000 6.000000 24.000000 12.754932
27.506000 6.000000 17.000000 7.383074
27.994000 8.000000 10.000000 3.077879
28.507000 9.000000 3.000000 1.393487
29.000000 9.000000 13.000000 3.824981
29.501000 11.000000 24.000000 7.729206
30.009000 13.000000 39.000000 15.070397
30.508000 16.000000 56.000000 24.076521

I don't know what I'll try next. I think I'll consider my options.