volume | PIER Journals

Abstract

Two major objectives are concerned in this paper. On one hand, a multiplicity of typical methodologies available for achieving dual-frequency operation for microstrip patch antennas are summarized and classified into three categories, based on their intrinsic mechanisms. On the other hand, by employing the dual-frequency solutions, microstrip patch antennas are applied to the mobile handsets of the third-generation IMT-2000 system. Two novel microstrip patch antennas with broadband property and miniaturized size have been proposed and discussed theoretically and experimentally. Only a single simply-slotted patch, either semi-disc or square, is introduced in each of the two probe-fed antennas. Both antennas exhibit the impedance bandwidths (return loss · −10 dB) of 25.6% and 34.4% respectively, which would be suitable for the practical application of the IMT-2000 mobile handsets.

1. James, J. R. and P. S. Hall, Handbook of Microstrip Antennas, Peter Peregrinus, London, 1989.

2. Fujimoto, K. and J. R. James (eds.), Mobile Antenna Systems Handbook, Artech House, Norwood, MA, 1989.

3. Pozar, M. and D. H. Schauber, Microstrip Antennas, the Analysis and Design of Microstrip Antennas and Arrays, IEEE Press, 1995.

4. Fujimoto, K., A. Henderson, K. Hirasawa, and J. R. James, Small Antennas, Research Studies Press, United Kingdom, 1987.

5. Hirasawa, K. and M. Haneishi, Analysis, Design, and Measurement of Small and Low-Profile Antennas, Artech House, 1992.

6. Maci, S. and G. B. Gentili, "Dual-frequency patch antennas," IEEE APM, Vol. 39, No. 6, Dec. 1997. Google Scholar

7. Bahl, I. J. and P. Bhartia, Microstrip Antennas, Artech House, Norwood, MA, 1980.

8. James, J. R., P. S. Hall, and C. Wood, Microstrip Antennas Theory and Design, Peter Peregrinus, London, 1981.
doi:10.1049/PBEW012E

9. Gupta, K. C. and A. Benalla (eds.), Microstrip Antenna Design, Artech House, Norwood, MA, 1988.

10. Fujmoto, K. and J. R. James (eds.), Mobile Antenna Systems Handbook, Artech House, Norwood, MA, 1994.

11. Wang, Y. J., "Dual-frequency microstrip patch antennas and their application for IMT-2000 mobile handsets,", Thesis of M.Eng., 221 pages, School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore, 2000. Google Scholar

12. Setian, L., Practical Communication Antennas with Wireless Applications, Feher/Prentice Hall digital and wireless communication series, Prentice Hall PTR, Upper Saddle River, NJ, 1998.

13. Mistry, P. M., "Third generation cellular (3G): W-CDMA and TD-CDMA," Wescon Conference Record Proceedings of the 1998 WESCON Conference, 227-231, Anaheim, CA, USA, Sep. 15–17, 1998. Google Scholar

14. IMT-2000, Radio Communication Bureau, Vol. 1997, M series- Part 2, 2000.

15. Leite, F., R. Engelman, S. Kodama, H. Mennenga, and S. Towaij, "Regulatory considerations relating to IMT-2000," IEEE Personal Communications, 14-19, Aug. 1997.
doi:10.1109/98.612273 Google Scholar

16. Waterhouse, R. B. and S. D. Targonski, "Performance of microstrip patches incorporation a single shorting post," Proc. IEEE Antennas Propag. Symp., AP-S Digest, Vol. 1, 29–32, Baltimore, MD, Jul. 1996. Google Scholar

17. Wang, Y. J., C. K. Lee, W. J. Koh, and Y. B. Gan, "Design of small and broadband internal antennas for IMT-2000 mobile handsets," IEEE Transactions on MTT, Vol. 49, No. 8, 1398-1403, Aug. 2001.
doi:10.1109/22.939919 Google Scholar

18. Delaveaud, C., P. Leveque, and B. Jecko, "New kind of microstrip antenna: The monopolar wire-patch antenna," Electronics Letters, Vol. 30, 1-2, Jan. 1994.
doi:10.1049/el:19940057 Google Scholar

19. Chen, W. S., "Single-feed dual-frequency rectangular microstrip antenna with square slot," Electronics Letters, Vol. 34, No. 3, 231-232, Feb. 1998.
doi:10.1049/el:19980140 Google Scholar

20. Wang, Y. J. and C. K. Lee, "A semi-disc microstrip antenna using a foam substrate and its application for 3G IMT-2000 mobile hand-phones," to be published in Journal of INstitute of Engineers, Singapore. Google Scholar

Dr. Y. J. Wang

Dr. C. Lee