The PT0S DXpedition will be using a yagi variation that I haven't seen before. It is for 20/15/10 and
looks like vertical elements with radials. ... Bob K6UJ
It's really a yagi-vertical array hybrid. It's called a GardenBeam: a tri-band vertically polarized parasitic array. It looks like a cross between a vertical array and a traditional Yagi beam, but is definitely vertically polarized. Vertically oriented Yagis do perform well from low heights (<5m), but at only higher freq (6M and greater). This antenna uses a set of vertical elements and a set of horizontal dipole elements, which are sized similarly to the elements of a Yagi. They say that near-optimum mounting occurs only 9 to 10 feet above ground!! Operation from an ocean side environment is the ideal setting for this antenna, not here in Winchester, VA.
The GardenBeam website says, "This results in a vertically polarized beam antenna that is well balanced and can be mounted at the center of its boom."
Could be something very interesting - even a break through in the use of rotatable vertical polarized antenna systems.
73, Rich, K3VAT