Shared Aperture Triangular Antenna Array for Ka-band LEO Satellite Communication

This paper presents a triangular antenna array design that allows an interlaced receive and transmit antenna array to be placed in the same array aperture on a single plane. This system is designed for Ku and Ka band LEO communication targeting the bandwidth of 18.8 - 20.2 GHz and transmit antennas at 27.5 - 30 GHz. This system is capable of reconfigurable circular polarisation for both RHCP and LHCP at both Rx and Tx bands. The array design can provide beam steering to
$\theta=\pm 40^{\circ}$
with only phase shifting applied. This system provides a very compact design that is easy to integrate with RFIC based feeding networks.