1. Egashira, S. and E. Nishiyama, "Stacked microstrip antenna with wide bandwidth and high gain," IEEE Trans. Antennas and Propagat., Vol. 44, 1533-1534, Nov. 1996.
doi:10.1109/8.542079
2. Araki, K., Araki, K., H. Ueda, and M. Takahashi, "Numerical analysis of circular disk microstrip antenna with parasitic elements," IEEE Trans. of Antennas and Propagat., Vol. 34, No. 12, 1390-1394, Dec. 1986.
doi:10.1109/TAP.1986.1143782
3. Fan, Z. and K. F. Lee, "Hankel transform domain analysis of dual-frequency stacked circular-disk and annular-ring microstrip antennas," IEEE Trans. of Antennas and Propagat., Vol. 39, No. 6, 867-870, June 1991.
doi:10.1109/8.86891
4. Tulintseff, A. N., S. M. Ali, and J. A. Kong, "Input impedance of a probe-fed stacked circular microstrip antenna," IEEE Trans. of Antennas and Propagat., Vol. 39, No. 3, 381-390, Mar. 1991.
doi:10.1109/8.76338
5. Croq, F. and Millimeter-wave design of wide-band, "Millimeter-wave design of wide-band aperture-coupled stacked microstrip antennas," IEEE Trans. of Antennas and Propagat., Vol. 39, No. 12, 1770-1776, Dec. 1991.
doi:10.1109/8.121599
6. Lee, R. Q. and Gain enhancement of microstrip, "Gain enhancement of microstrip antennas with overlaying parasitic directors," Electron. Lett., Vol. 24, No. 11, 656-658, May 1998.
doi:10.1049/el:19880444
7. Lee, R. Q. and K. F. Lee, "Experimental study of two-layer electromagnetically coupled rectangular patch antenna," IEEE Trans. of Antennas and Propagat., Vol. 38, No. 8, 1298-1302, Aug. 1990.
doi:10.1109/8.56971
8. Yee, K. S., "Numerical solutions of initial boundary value problems involving Maxewll's equations in isotropic media," IEEE Trans. Antennas and Propagat., Vol. 14, No. 3, 302-307, May 1966.
9. Berenger, J. P., "A perfectly matched layer for the absorption of electromagnetic waves," J. Compute. Phys., Vol. 114, 185-200, Oct. 1994.
doi:10.1006/jcph.1994.1159
10. Taflove, A., Computational Electrodynamics: The Finite-Difference Time-Domain Method (Chapter 8), Vol. 114, 185-200, Artech House, Inc.;J. Compute. Phys., Oct.1994 1995.