The mean lifetime of my simple wire antennas is relatively short, and my folded weirdly antenna for the 40m band was no exception.
https://spinorlab.wordpress.com/2013/09/19/folded-weirdly/
Last weekend I re-installed the element with supposedly almost the same configuration, but this time with each leg of the element to be 10m long.
With the usual measurement it is observed that at 7026kHz CH1=2.943V, CH2=2.638V, and CH2-delay=+12.60nS.
gnuplot> load "gnuplot.txt" Freq [MHz]=7.026 V1=2.943 V2=2.638 Cursor 1=1.26e-08 Cursor 2=0.0 vratio=0.896364254162419 phase1 [deg]=31.869936 phase2 [deg]=0.0 abs(gamma)=0.530090794923996 swr=3.25614135325678 cz={20.4433917939881, 26.9131366419314}
With a Smith chart and a physical cable length of 20m (remember the velocity factor of 0.66), you start from a red point (Zdut=20.443+j26.913), rotate towards load (not towards generator!), and end with a green point (Zant=27.182-j40.050), which shows the radiation impedance of the antenna.