HB9PZK POTY Lenses for 10GHz QO-100 downlink

Willi HB9PZK modelled a Rexolite lens for a “POTY” dual-band patch antenna to use on the 10GHz downlink from the QO-100 amateur satellite. https://rfantennas.wordpress.com/author/hb9pzk/

The design is a joy to make when compared with the dual-taper versions. I have some one-inch Rexolite 1422 round bar, so I’ve been making a few of these lenses to replace the lossy Nylon versions that some folks are using. Rexolite is a cross-linked polystyrene, which machines rather like plexiglas. It has a tan-delta around 0.0004 and almost zero water absorption.

Willi’s design has a stepped transition to the read. This latest batch is to fit UK 22mm plumbing pipe with a nominal wall thickness of 0.9mm and an inside bore of 20.2mm instead of the standard 20.0 bore.

Two Rexolite HB9PZK-designed lenses for 20.2mm ID waveguide
One of the lenses fitted to a POTY

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