Hello, I was able to finish the software and experimental work required to fully characterize the errors of the reference antenna! Full details, including code, new graphs and exact reference antenna gain characteristics here: https://www.hamwan.org/t/tiki-index.php?page=Antenna+Analysis&structure=HamW... What this means is we have a properly calibrated field strength emission system and any antennas dropped into it and measured will result in ONLY their characteristics showing up in the readings! I've settled on the use of a high directivity antenna to minimize and ignore the impact of multipath effects. Now the next step is to drop the candidate antennas into the test setup and compare their behavior with respect to frequency. After that, I need to get busy on building the rotor rig to be able to measure radiation patterns, not just frequency response. Ever onward, --Bart