Antenna Parameters
Inner Radius. The inner radius. See the diagram above.
Track Width. The width of the copper track forming the antenna.
Trace Space. The space between copper rings. See the diagram above.
Rings. The number of complete rings.
Check the 
check box to use plated through holes for the pads. Uncheck to use SMT pads,
Check the 
check box is run the rings clockwise. Uncheck to run the rings in the opposite direction.
Clockwise
Anticlockwise
Check the 
check box to add an outer ring.
Antenna with outer ring