“…However, the asymmetry of reflector structure itself leads to the deterioration of cross‐polarization (XP) and the value is generally about −25 dB, 4,5 which does not meet the high requirement in some special system. To improve the XP performance, the common scheme is (1) increasing the focal length to weaken the effect of the asymmetry on the XP performance 6,7 ; (2) reshaping the surface of the reflector to change the amplitude and phase distribution of surface field, then to improve the XP performance 8,9 ; (3) redesigning the feed to let it operate at the multimode state to improve the XP performance 10–12 ; (4) using dual‐reflector to suppress the XP performance 13 . However, increasing the focal length will be limited by the satellite structure, and the improvement effect is extremely limited.…”