1. Tulintseff, A. N. and R. M. Sorbello, "Current and radiation fields of electromagnetically coupled microstrip antennas," IEEE AP-S, Vol. 2, 928-931, 1987.
2. Fan, Z. and K. F. Lee, "Hankel transform domain analysis of a dual frequency stacked circular disk and annular ring microstrip antennas," IEEE Trans. Antennas Propag., Vol. 39, 867-870, 1991.
doi:10.1109/8.86891
3. Cock, R. T. and C. G. Christodoulou, "Design of a twolayer capacitively coupled, microstrip patch antenna element for broadband applications," IEEE Antennas Propag. Soc. Int. Symp. Dig., Vol. 2, 936-939, 1987.
4. Shen, Z. and R. H. MacPbie, "Waveguide model analysis of single and stacked probe-fed microstrip antenna with circular geometries," IEEE Antennas Propag Symposium, Vol. 2, 598-601, 1998.
5. Nishiyama, E. and M. Aikawa, "Wide band and high gain microstrip antenna with thick parasitic patch substrate," IEEE Antennas Propag Society International Symposium, Vol. 1, 273-276, 2004.
6. Nishiyama, E., M. Aikawa, and Egashira, "FDTD analysis of stacked microstrip antenna with high gain," Progress In Electromagnetics Research, Vol. 33, 29-43, 2001.
doi:10.2528/PIER00091501
7. Tagle, J. G. and C. G. Christodoulou, "Extended cavity model analysis of stacked microstrip ring antenna," IEEE Trans. Antennas Propag., Vol. 45, No. 11, 1628-1637, 1997.
doi:10.1109/8.650074
8. Anguera, J., C. Puente, C. Borja, N. Delbene, and J. Soler, "Dual frequency broad band stacked microstrip patch antenna," IEEE Antenna and Wireless Letters, Vol. 3, 36-39, 2003.
doi:10.1109/LAWP.2003.811325
9. Chakravarty, T., S. M. Roy, S. K. Sanyal, and A. De, "A novel microstrip patch antenna with large impedance bandwidth in VHF/UHF range," Progress In Electromagnetics Research PIER 54, Vol. '' Progress In Electromagnetics Research 54, 83-93, 2005.
doi:10.2528/PIER04102101
10. Gao, S., L. W. Li, and A. Sambell, "FDTD analysis of dual frequency microstrip patch antenna," Progress In Electromagnetics Research, Vol. 54, 155-178, 2005.
doi:10.2528/PIER04120102
11. De, A., "Studies on rectangular and circular patch radiators," Ph.D. Thesis, 1985.
12. Shen, L. C., "Analysis of the circular-disk printed-circuit antenna," IEEE Proc. Microw. Antennas Propag., Vol. 126, 1220-1222, 1979.
13. Yano, S. and AIshimaru, "A theoretical study of the input impedance of a circular microstrip disk antenna," IEEE Trans. Antennas Propag., Vol. AP-29, 77-83, 1981.
doi:10.1109/TAP.1981.1142535
14. Collin, R. E. and F. J. Zucker, Antenna Theory, Part I, 1969.
15. Harrington, R. F., Time Harmonic Electromagnetic Fields, McGraw-Hill, 1961.
16. Yano, S. and A. Ishimaru, "A theoretical study of the input impedance of a circular microstrip disk antenna," IEEE Trans. Antennas Propag., Vol. AP-29, 77-83, 1981.
doi:10.1109/TAP.1981.1142535
17. Balanis, C. A., Antenna Theory: Analysis and Design, 2nd edition.
18. Bahl, I. J. and P. Bhartia., Microstrip Antennas, Artech House, 1980.
19. Damiano, J. P. and A. Papiernik, "Survey of analytical and numerical models for probe-fed microstrip antennas," IEEE Proc. Microwave Antennas Propag., Vol. 141, No. 1, 15-21, 1994.
20. Zheng, J. X. and D. C. Chang, "End-correction network of a coaxial probe for microstrip patch antennas," IEEE Trans. Antennas Propag., Vol. AP-39, No. 1, 115-118, 1991.
doi:10.1109/8.64446
21. Guha, D., "Resonant frequency of circular microstrip antenna with or without air gaps," IEEE Trans. Antennas Propag., Vol. AP-49, No. 1, 55-59, 2001.
doi:10.1109/8.910530