The adjacent graph is a VSWR plot of the 80 Meter portion of my fan dipole, for 80 & 40 Meters.
The 2:1 VSWR Bandwith of the 80 Meter antenna is approximately 125 KHz. The antenna was trimmed for the Amateur Extra segment and the tuner in my TS-2000 successfully tunes the entire band.
The adjacent graph is a VSWR plot of the 40 Meter portion of my fan dipole, for 80 & 40 Meters.