1. Dahele, J. S., K. F. Lee, and D. P.Wong, "Dual-frequency stacked annular-ring microstrip antenna," IEEE Trans. Ant. Propagat., Vol. AP-35, No. 11, 1281-1285, Nov. 1987.
doi:10.1109/TAP.1987.1143997
2. Wang, J., R. Fralich, C. Wu, and J. Litva, "Multifunctional aperture coupled stacked antenna," Electron. Lett., Vol. 26, No. 25, 2067-2068, 1990.
doi:10.1049/el:19901333
3. Mirshekar-Syankal, D. and H. R. Hassani, "Characteristics of stacked rectangular and triangular patch antennas for dual band applications," IEE 8th ICAP, Edinburgh, March 1993.
4. Croq, F. and D. M. Pozar, "Multifrequency operation of microstrip antennas using aperture coupled parallel resonators," IEEE Trans. Ant. Propagat., Vol. AP-40, No. 11, 1367-1374, Nov. 1992.
doi:10.1109/8.202714
5. Richards, W. F., S. E. Davidson, and S. A. Long, "Dual-band reactively loaded microstrip antenna," IEEE Trans. Ant. Propagat., Vol. AP-33, No. 5, 556-560, May 1985.
doi:10.1109/TAP.1985.1143617
6. Davidson, S. E., S. A. Long, and W. F. Richards, "Dual-band microstrip antenna with monolithic reactive loading," Electron. Lett., Vol. 21, No. 21, 936-937, 1985.
doi:10.1049/el:19850662
7. Waterhouse, R. B. and N. V. Shuley, "Dual frequency microstrip rectangular patches," Electron. Lett., Vol. 28, No. 7, 606-607, 1992.
doi:10.1049/el:19920382
8. Zhong, S. S. and Y. T. Lo, "Single element rectangular microstrip antenna for dual frequency operation," Electron. Lett., Vol. 19, No. 8, 298-300, 1983.
doi:10.1049/el:19830208
9. Schaubert, D. H., F. G. Ferrar, A. Sindoris, and S. T. Hayes, "Microstrip antennas with frequency agility and polarization diversity," IEEE Trans. Ant. Propagat., Vol. AP-29, No. 1, 118-123, Jan. 1981.
doi:10.1109/TAP.1981.1142546
10. Maci, S., G. Biffi Gentili, P. Piazzesi, and C. Salvador, "Dualband slot-loaded patch antenna," IEE Proc. Microw. Antennas Propag., Vol. 142, No. 3, 225-232, June 1995.
doi:10.1049/ip-map:19951932
11. Piazzesi, P., S. Maci, and G. Biffi Gentili, "Dual-band, dualpolarized patch antennas," Int. J. MlMCAE, Vol. 5, No. 6, 375-384, 1995.
12. Wang, B. F. and Y. T. Lo, "Microstrip antenna for dual-frequency operation," IEEE Trans. Ant. Propagat., Vol. AP-32, No. 9, 938-943, Sept. 1984.
doi:10.1109/TAP.1984.1143459
13. Chen, J. S. and K. L. Wong, "single-layer dual-frequency rectangular microstrip patch antenna using a single probe feed," Microw. Opt. Technol. Lett., Vol. 11, 83-84, 1996.
doi:10.1002/(SICI)1098-2760(19960205)11:2<83::AID-MOP10>3.0.CO;2-8
14. Antar, Y. M. M., A. Ittipiboon, and A. K. Bhattacharyya, "A dual-frequency antenna using a single patch and an inclined slot," Microw. Opt. Technol. Lett., Vol. 8, 309-311, 1995.
doi:10.1002/mop.4650080613
15. Chen, W. S., "Single-feed dual-frequency rectangular microstrip antenna with square slot," Electron. Lett., Vol. 34, No. 3, 231-232, 1998.
doi:10.1049/el:19980140
16. Yee, K. S., "Numerical solution of initial boundary value problems involving Maxwell’s equations in isotropic media," IEEE Trans. Ant. Propagat., Vol. AP-14, No. 5, 302-307, May 1966.
17. Taflove, A. and M. E. Brodwin, "Numerical solution of steady state electromagnetic scattering problems using the time-dependent Maxwell’s equations," IEEE Trans. Microw. Theory Tech., Vol. MTT-23, No. 8, 623-630, Aug. 1975.
doi:10.1109/TMTT.1975.1128640
18. Reimeix, A. and B. Jecko, "Analysis of microstrip patch antennas using finite difference time domain method," IEEE Trans. Ant. Propagat., Vol. AP-37, No. 11, 1361-1369, Nov. 1989.
19. Sheen, D. M., S. M. Ali, M. D. Abowzahra, and J. A. Kong, "Application of the three- dimensional finite-difference time-domain method to the analysis of planar microstrip circuit," IEEE Trans. Microw. Theory Tech., Vol. MTT-38, No. 7, 849-857, July 1990.
doi:10.1109/22.55775
20. Zhang, X. and K. K. Mei, "Time-domain finite difference approach to the calculation of the frequency-dependent characteristics of microstrip discontinuities," IEEE Trans. Microw. Theory Tech., Vol. MTT-36, No. 12, 1775-1787, Dec. 1988.
doi:10.1109/22.17413
21. Liao, Z. P., H. L. Wong, G. P. Yang, and Y. F. Yuan, "A transmitting boundary for transient wave analysis," Scientia Sinica, Vol. 28, No. 10, 1063-1076, Oct. 1984.
22. Mei, K. K. and J. Fang, "Superabsorption --– A method to improve absorbing boundary conditions," IEEE Trans. Ant. Propagat., Vol. AP-40, No. 9, 1001-1010, Sept. 1992.
doi:10.1109/8.166524
23. Luebbers, R., L. Chen, T. Uno, and S. Adachi, "FDTD calculation of radiation patterns,impedance,and gain for a monopole antenna on a conducting box," IEEE Trans. Ant. Propagat., Vol. AP-40, No. 12, 1577-1583, Dec. 1992.
doi:10.1109/8.204752
24. Jensen, M. and Y. Rahmat-Samii, "Performance analysis of antennas for hand- held transceivers using FDTD," IEEE Trans. Ant. Propagat., Vol. AP-42, No. 8, 1106-1113, Aug. 1994.
doi:10.1109/8.310002
25. Wu, C., K. Wu, Z. Bi, and J. Litva, "Accurate characteristics of planar printed antenna using finite-difference time domain method," IEEE Trans. Ant. Propagat., Vol. AP-40, No. 5, 526-533, May 1992.
doi:10.1109/8.142627
26. Tirkas, P. A. and C. A. Balanis, "Finite difference time domain method for antenna radiation," IEEE Trans. Ant. Propagat., Vol. AP-40, No. 3, 334-340, Mar. 1992.
doi:10.1109/8.135478
27. Balanis, C. A., Antenna Theory: Analysis and Design, Wiley, New York, 1982.
28. James, J. R., P. S. Hall, and ed., Handbook of Microstrip Antennas, Peter Peregrinus, 1989.
29. Palanisamy, V. and R. Garg, "Analysis of arbitrarily shaped microstrip patch antennas using segmentation technique and cavity model," IEEE Trans. Ant. Propagat., Vol. AP-34, 1208-1213, 1986.
doi:10.1109/TAP.1986.1143737
30. Luebbers, R. J. and H. S. Langdon, "A simple feed model that reduces time steps needed for FDTD antenna and microstrip calculations," IEEE Trans. Ant. Propagat., Vol. AP-44, 1000-1005, 1996.
doi:10.1109/8.504308