This is a ground plane antenna for 20 meters. Radiating element is 217.5 inches long. Bottom of the transmitting element is 60 inches off the ground. There are 8 ground radials each 145.7 inches long are all tied together 54 inches above the ground. The radiator is 1 inch aluminum pipe using 12 ga wire as the ground plane.

Here are the Far field plots for this antenna
Great for DX

SWR plot for 800 kHz bandwidth 14.0  14.4 MHz
SWR is less than 1.2 for the entire 20 Meter band

Current Field for 20 Meter Vertical Antenna

20 Meter Vertical Z plot form 14.0 through 14.4 MHz
Antenna is matched for 50 ohm feed line.
