ANTENNAS

WA5VJB was unable to do this month’s column due to a family emergency. We turn the keyboard for this issue over to CP6CL, who offers us a new look at a nearly century-old antenna design, the Windom. – W2VU

A new Windom antenna design is presented here for use from 80-10 meters, including the 60-, 30-, and 15-meter bands, without using parallel antennas, coils, traps, or the devices. The solution is very simple, so it is very easy to try.

The Windom antenna was developed by Loren Windom, W8GZ, in 1929. It has since undergone many refinements and improvements. In the original version proposed by Loren, the feed point was at 66% of the total antenna length. So for a multiband antenna that has 80 meters as the lowest frequency, the voltage distribution of each band of even harmonics is superimposed at the 66% point, hence it is guaranteed that the impedance does not change on). It can be seen that for even bands higher in frequency than 80 meters, the waves coincide in the vicinity of 66%, even 17 meters, even though it is not an even harmonic. This has been a great gift.