Model of an 80 / 40 M NVIS antenna, two dipoles at right angles to each other, both fed with one feed line. Center height 20', end wires at 8'. This showes a view of the antenna. Red lines show the X,Y and Z axis. With your mouse you can move the view of the antenna to any angle on any axis. The curved lines above the wires show relative current in the elements. The short wires are for 40 M. Very little current flows in the longer (80 m) wires when 40M is in use.