On 8/24/22 1:46 AM, F1AMM wrote:
M1 = Gunk * Gref1
M2 = Gref1 * Gref2
M3 = Gunk * Gref2
This assumes that Gunk Gref1 and Gref2 are constant during the three measurements. I do not see at all how one can fulfill this condition already because of the directionality of the antennas.
Or do you suppose that it is, for example, 3 yaggi that we reorient in the axis of each measure?
Yes, the antennas are mounted in the same positions, relative to each other, for all measurements. The reference antennas can be dipoles. There's no need for all 3 antennas to have the same (approximate) gain.
This was for a "nose to nose" gain measurement.
If you need to do a radiation pattern, it gets trickier. Essentially you calibrate the "probe" antenna with a duplicate at known range.
if you want to measure radiation patterns, then reflections and such becomes a bigger issue.
