Receiver design for the REACH global 21-cm signal experiment by Roque, ILV, Razavi-Ghods, N, Carey, SH, Ely, JA, Handley, W, Magro, A, Chiello, R, Huang, T, Alexander, P, Anstey, D, Bernardi, G, Bevins, HTJ, Cavillot, J, Croukamp, W, Cumner, J, de Lera Acedo, E, de Villiers, DIL, Fialkov, A, Gessey-Jones, T, Gueuning, Q, Josaitis, AT, Kulkarni, G, Leeney, SAK, Maiolino, R, Zarb-Adami, K