Radio Link Budget
I am not a radio antenna designer.
Server-sats are covered with dipole antennas, in-plane with other conducting items like heat sinks and solar cells. It is likely that the antennas will act like separate uncoupled dipoles, but perhaps the other conductive areas can be shaped to link the antennas and maximize directionality. THIS NEEDS FURTHER STUDY.
Server satellites do not have dish antennas. While this would greatly enhance gain, dishes are not agile.
With clever design, a server-sat will behave as if the approximately 15 cm "central disk" inside the electrochromic thrusters acts as a phased emitter. The 37 GHz uplink/downlink wavelength is 8mm. The gain is $ G = ( \pi D / \lambda )^2 = 3500 $ and the beam width in degrees is approximately $ BW = 70 \lambda / D = 3.7 \degree "