[PSDR] Sector antenna frequency response curves published!

[Bart Kus]

Hello,

After way too many side-quests, I've finally managed to measure the 
frequency response curves of the 2 top sector antenna candidates. The 
measurements were made using a higher precision technique than 
originally published for antenna frequency response measurement. The 
software to help the measurements has also been updated.  The improved 
precision technique is in the last section of the Antenna Analysis page:

https://www.hamwan.org/t/tiki-index.php?page=Antenna+Analysis&structure=HamWAN

The ARC ARC-VS5818SD1 sector antenna FR curve is linked at the top of 
the above page, but can be directly viewed here:

https://www.hamwan.org/t/tiki-index.php?page=ARC+ARC-VS5818SD1&structure=HamWAN

The Laird SAH58-120-16-WB sector antenna FR curve is also linked at the 
top of the Antenna Analysis page, but here you go:

https://www.hamwan.org/t/tiki-index.php?page=Laird+SAH58-120-16-WB&structure=HamWAN

The figure of merit in these tests is low variability.  A constant gain 
across the whole spectrum is ideal.

Next up, I need to build an antenna rotor system and do radiation 
pattern measurements.  This is gonna be tough.  Anybody wanna donate an 
AZ/EL rotor?  Or any decent computer-controlled rotor?

--Bart