The elements are now folded somewhat more artistically for my 40m band dipole.
gnuplot> load "gnuplot1.txt" Freq [MHz]=7.026 V1=2.836 V2=2.544 Cursor 1=1.84e-008 Cursor 2=4.52e-008 vratio=0.89703808180536 phase1 [deg]=46.540224 phase2 [deg]=114.327072 abs(gamma)=0.755401024840705 swr=7.17664914048597 cz={9.18797000120047, 27.8663957175412}
This time Zant is estimated to be 14.025-49.337j [ohm].
Using the internal antenna tuner of ICOM IC-7410, the VSWR becomes close to 1.0 after tuning.