1. Bao, X. L. and M. J. Ammann, "Dual-frequency dual-sense circularly-polarized slot antenna fed by microstrip line," IEEE Trans. on Antennas and Propag., Vol. 34, No. 3, 645-649, 2008.
doi:10.1109/TAP.2008.916961 Google Scholar
2. Bao, X. L. and M. J. Ammann, "Monofilar spiral slot antenna for dual-frequency dual-sense circular polarization," IEEE Trans. on Antennas and Propag., Vol. 59, No. 8, 3061-3065, 2011.
doi:10.1109/TAP.2011.2158964 Google Scholar
3. Chen, Y. Y., Y. C. Jiao, G. Zhao, F. Zhang, Z. L. Liao, and Y. Tian, "Dual-band dual-sense circularly polarized slot antenna with a c-shaped grounded strip," IEEE Antennas Wirel. Propag. Lett., Vol. 10, 915-918, 2011.
doi:10.1109/LAWP.2011.2166750 Google Scholar
4. Dorsey, W. M. and A. I. Zaghloul, "Dual-band, dual-circularly polarised antenna element," IET Microw. Antennas Propag., Vol. 7, No. 4, 283-290, 2013.
doi:10.1049/iet-map.2012.0625 Google Scholar
5. Chen, C. H. and E. K. N. Yung, "Dual-band dual-sense circularly-polarized CPW-fed slot antenna with two spiral slots loaded," IEEE Trans. on Antennas and Propag., Vol. 57, No. 6, 1829-1833, 2009.
doi:10.1109/TAP.2009.2019990 Google Scholar
6. Shao, Y. and Z. Y. Chen, "A design of dual-frequency dual-sense circularly-polarized slot antenna," IEEE Trans. on Antennas and Propag., Vol. 60, No. 11, 4992-4997, 2012.
doi:10.1109/TAP.2012.2208444 Google Scholar
7. Lee, B., F. J. Harackiewicz, K. H. Kong, J. Byun, and S. H. Yang, "Dual-band dual-circularly-polarized sector antenna for GPS and DAB systems," Microw. Opt. Technol. Lett., Vol. 46, No. 1, 43-46, 2005.
doi:10.1002/mop.20896 Google Scholar
8. Rezaeieh, S. A., "Dual band dual sense circularly polarised monopole antenna for GPS and WLAN applications," Electron. Lett., Vol. 47, No. 22, 1212-1214, 2011.
doi:10.1049/el.2011.2252 Google Scholar
9. Zhang, Q. C. and W. Wu, "Compact dual-band circularly-polarised cavity-backed slot antenna," Electron. Lett., Vol. 47, No. 17, 947-948, 2011.
doi:10.1049/el.2011.1820 Google Scholar
10. Yu, T. B., C. Peng, H. B. Li, and P. C. Xu, "A new design of dual band dual circular-polarized micro-strip antenna array," 2011 IEEE International Conference on Microwave Technology & Computational Electromagnetics (ICMTCE), 203-205, 2011.
doi:10.1109/ICMTCE.2011.5915489 Google Scholar
11. Wong, K. L., C. C. Huang, and W. C. Chen, "Printed ring slot antenna for circular polarization," IEEE Trans. on Antennas and Propag., Vol. 50, No. 1, 75-77, 2002.
doi:10.1109/8.992564 Google Scholar
12. Huang, C. Y. and K. L. Wong, "Stripline-fed printed square spiral slot antenna for circular polarisation," Electron. Lett., Vol. 34, No. 24, 2290-2292, 1998.
doi:10.1049/el:19981644 Google Scholar
13. Row, J. S., "The design of a squarer-ring slot antenna for circular polarization," IEEE Trans. on Antennas and Propag., Vol. 53, No. 6, 1967-1972, 2005.
doi:10.1109/TAP.2005.848482 Google Scholar
14. Sze, J. Y. and S. P. Pan, "Design of broadband circularly polarized square slot antenna with a compact size," Progress In Electromagnetics Research, Vol. 120, 513-533, 2011. Google Scholar
15. Wu, G. L., W. Mu, G. Zhao, and Y. C. Jiao, "A novel design of dual circularly polarized antenna fed by L-strip," Progress In Electromagnetics Research, Vol. 79, 39-46, 2008.
doi:10.2528/PIER07092001 Google Scholar
16. Ding, Y. and K. W. Leung, "Dual-band circularly polarized dual-slot antenna with a dielectric cover," IEEE Trans. on Antennas and Propag., Vol. 57, No. 12, 3757-3764, 2009.
doi:10.1109/TAP.2009.2025787 Google Scholar
17. Rezaeieh, S. A. and M. Kartal, "A new triple band circularly polarized square slot antenna design with crooked T and F-shape strips for wireless applications," Progress In Electromagnetics Research, Vol. 92, 195-208, 2009. Google Scholar
18. Heidari, A. A., M. Heyrani, and M. Nakhkash, "A dual-band circularly polarized stub loaded microstrip patch antenna for GPS applications," Progress In Electromagnetics Research, Vol. 121, 1-18, 2011. Google Scholar
19. Wang, L., W. X. Guo, and W. X. Sheng, "A single-feed tri-band circularly polarized dual-annular slot antenna for wireless applications," Journal of Electromagnetic Waves and Applications, Vol. 26, No. 11-12, 1389-1396, 2012.
doi:10.1080/09205071.2012.700888 Google Scholar