The upcoming DXpedition to St. Peter & St. Paul Rocks PT0S (10-22 November) will be making use of a unique type of antenna on 10, 15 and 20 meters.
Necessitated by the rugged terrain – and very little of it – the Garden Beam came about through the experiences of HA7RY and AA7JV on Mellish Reef, Chesterfield Island and Willis Islet.
In other words, places surrounded by the beneficial RF ground made possible by saltwater.
Essentially it is a triband Yagi in which the entirety of the Yagi is the counterpoise for an array of vertical elements located 90 degrees from the traditional Yagi’s elements. Vertically polarized, derivatives of this antenna have
performed well in the above-mentioned locations.
Additionally, a tower is not needed as would be the case with a horizontally polarized antenna, further driving the decision for this design at PT0S since a tall support would be difficult on what are essentially rock outcroppings in the ocean.
More about the antenna and the DXpedition can be read here.