Available under a Creative Commons Attribution Non-Commercial Share Alike 4.0 International Licence
2.2 ELECTRICAL, ELECTRONIC, INFORMATION ENGINEERING
The 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°).
A. Narbudowicz, M. J. Ammann and D. Heberling, "Axial ratio correction for GNSS antennas in asymetrically coupled environments," 2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting, 2017, pp. 2621-2622, doi: 10.1109/APUSNCURSINRSM.2017.8073353.