1. Zhong, S., Antenna Theory and Techniques, 2nd edition, Publishing House of Electronic Industry, Beijing, 2015.
2. Kommalapati, A. C., C. Zhao, and S. Aditya, "A printed planar helix antenna," 9th European Conference on Antennas and Propagation (EuCAP), 2015.
3. Syrytsin, I., S. Zhang, and G. F. Pedersen, "Circularly polarized planar helix phased antenna array for 5G mobile terminals," International Conference on Electromagnetics in Advanced Applications (ICEAA), Verona, Italy, 2017.
4. Huang, J., Z. Xue, W. Ren, and W. Li, "The low-profile end-fire antenna with circular polarization at S band," IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting, San Diego, CA, USA, 2017.
5. Chen, Z. and Z. Shen, "Planar helical antenna of circular polarization," IEEE Transactions on Antennas and Propagation, Vol. 63, No. 10, 4315-4323, 2015.
doi:10.1109/TAP.2015.2463746
6. Zainud-Deen, S. H., H. A. El-Azem Malhat, N. A. A. S. El-Shalaby, and S. M. Gaber, "Circular polarization bandwidth reconfigurable high gain planar plasma helical antenna," IEEE Transactions on Plasma Science, Vol. 47, No. 9, 4274-4280, 2019.
doi:10.1109/TPS.2019.2931989
7. Naqvi, A. H., J.-H. Park, C.-W. Baek, and S. Lim, "V-band end-fire radiating planar micromachined helical antenna using through-glass silicon via (TGSV) technology," IEEE Access, No. 7, 87907-87915, 2019.
doi:10.1109/ACCESS.2019.2925073
8. Chen, Q., W. Wu, Y. Di, and Z. Hu, "A planar compact helical log-periodic array," IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting, Boston, MA, USA, 2018.
9. Kraus, J. D. and R. J. Marhefka, Antennas: For All Applications, 3rd edition, Publishing House of Electronic Industry, Beijing, 2008.
