This antenna is made from two elements but the gain is about the same as the 3-element Yagi. At lower frequencies, where the elements are quite large, one can see that this antenna has the huge advantage in price, weight and wind resistance. The gain is approximately 6.5dBi. The only small drawback is the need for a capacitor for tuning the SWR.
Put the capacitor on a hot-wire lead.
- R – Reflector length,
- S – Length of the Radiating element,
- A – distance between R and S, center to center,
- RS – distance from the line of the symmetry of the antenna and the point where the phasing line is attached to the R,
- SS – distance from the line of the symmetry of the antenna (line that passes through the center of the boom) and the point where the phasing line is attached to the S,
- C – Approximate capacity for which the best SWR can be achieved. It is best to use variable capacitor to find the exact capacity, and then replace it with fixed capacitor.