  Satellite swarms have recently gained attention in the space industry due to
their ability to provide extremely narrow beamwidths at a lower cost than
single satellite systems. This paper proposes a concept for a satellite swarm
using a distributed subarray configuration based on a 2D normal probability
distribution. The swarm comprises multiple small satellites acting as subarrays
of a big aperture array limited by a radius of 20000 wavelengths working at a
central frequency of 19 GHz. The main advantage of this approach is that the
distributed subarrays can provide extremely directive beams and beamforming
capabilities that are not possible using a conventional antenna and satellite
design. The proposed swarm concept is analyzed, and the simulation results show
that the radiation pattern achieves a beamwidth as narrow as 0.0015-degrees
with a maximum side lobe level of 18.8 dB and a grating lobe level of 14.8 dB.
This concept can be used for high data rates applications or emergency systems.
