1. Nasimuddin, Y., S. Anjani, and A. Alphones, "A wide-beam circularly polarized asymmetricmicrostrip antenna," IEEE Trans. Antennas Propag., Vol. 63, No. 8, 3764-3767, Aug. 2015.
doi:10.1109/TAP.2015.2438397
2. Nasimuddin, X. Qing, Z. N. Chen, "A compact circularly polarized slotted patch antenna for GNSS applications," IEEE Trans. Antennas Propag., Vol. 62, No. 12, 6506-6509, Dec. 2014.
doi:10.1109/TAP.2014.2360218
3. Yuan, J., J. Zheng, and Z. Chen, "A compact meandered ring antenna loaded with parasitic patches and a slotted ground for global navigation satellite systems," IEEE Trans. Antennas Propag., Vol. 66, No. 12, 6835-6843, Dec. 2018.
doi:10.1109/TAP.2018.2869209
4. Row, J. S., "Design of square-ring microstrip antenna for circular polarisation," Electron. Lett., Vol. 40, No. 2, Jan. 2004.
doi:10.1049/el:20040094
5. Li, Y., S. Sun, and F. Yang, "A miniaturized Yagi-Uda-oriented double-ring antenna with circular polarization and directional pattern," IEEE Antennas Wirel. Propag. Lett., Vol. 12, 945-948, Aug. 2013.
doi:10.1109/LAWP.2013.2274491
6. Ta, S. X. and I. Park, "Dual-band low-profile crossed asymmetric dipole antenna on dual-band AMC surface," IEEE Antennas Wireless Propag. Lett., Vol. 13, 587-590, 2014.
7. Liu, S., D. Yang, and J. Pan, "A low-profile circularly polarized metasurface antenna with wide axial-ratio beamwidth," IEEE Antennas Wireless Propag. Lett., Vol. 18, No. 7, 587-590, 2019.
8. Sumi, M., "A circularly polarized metasurface antenna comprising rectangular loops with gaps for GNSS receivers," 2019 International Workshop on Antenna Technology (iWAT), 133-134, Miami, USA, Mar. 3–6, 2019.