Glenn:
I reviewed the antenna that you linked to (WMO-18011) and I am pretty sure that it isn't compatible with the polarization switch that you linked to. The antenna has an unusual feed element that gives H and V output directly, without having to phase the driving elements to achieve H or V linear polarization. This polarization switch with this antenna will produce +45 degree, -45 degree, RHCP and LHCP.
