Narbudowicz, A.A.NarbudowiczAmmann, M.J.M.J.AmmannHeberling, D.D.Heberling2022-03-142022-03-142017https://publica.fraunhofer.de/handle/publica/40219910.1109/APUSNCURSINRSM.2017.8073353The paper demonstrates a technique to correct the axial ratio of dual-fed circularly-polarized antennas in the presence of strong coupling with surrounding components or asymmetrically reduced ground plane. It demonstrated - based on a standard GPS L1 patch antenna - that for certain situations a phase shift of up to 135° may be beneficial compared to the routinely used 90°, allowing for AR improvement from 7.8 dB (for 90°) to 2.1 dB (135°).en621conference paper