Hello,

I've taken some time tonight to improve the radiation pattern measurement software.  The algorithm for auto-centering the rotation of the pattern won't be fooled now by the presence of a non-centered peak lobe.  Full description of the software function and the software itself have both been published to the Antenna Analysis labs page.  The radiation pattern for the Laid sector has been updated and you can see the wonky alignment is now gone!

Since neither of these antennas are thrilling performers in the HamWAN Labs tests, a couple more candidates have been added to the Sector Antenna - 120deg component engineering page.  A HamWAN community member who wishes to remain anonymous has generously purchased sample antennas of the Teletronics and RF Elements brands for lab testing.  They should arrive some time next week.

In the meantime, I've had a thought about how to improve F/B ratios in these sector antennas.  Using a sheet of aluminum and my sheet metal brake, I should be able to manufacture traditional RF shields, like this:



but without fancy holes or adjustable features.  It might be enough to keep that nasty high power adjacent RF out.

--Bart