Marcus Müller on Nostr: You'll need some space; for small beamwidths, the horizontal length of the antenna ...

You'll need some space; for small beamwidths, the horizontal length of the antenna system is roughly the wavelength divided by the 3dB beam width, so , with a pi/90 wide beam, and a 2m carrier, you need an antenna system 180/pi m ~= 60 m long, broadside to the directions you want to beamform to. (you can use the good ole rule of thumb above, or do the math where you realize that when you put emitters on a regular distance next to each other, the DFT links the …