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Abstract

Radiation from a superstrate loaded cylindrical-rectangular microstrip patch antenna with an air gap between the substrate and the superstrate, is analyzed using the full-wave approach and the electric surface current model. Results are presented in the form of normalized radiation patterns for various thicknesses of the air gap and also for superstrates made of lossy dielectric material, to show the effects of these on the radiation from the antenna. Both axialand azimuthal current elements are considered.

1. Luk, K. M., K. F. Lee, and J. S. Dahele, "Analysis of the cylindrical-rectangular patch antenna," IEEE Trans. Antennas Propagat., Vol. 37, No. 2, 143-147, 1989.
doi:10.1109/8.18699

2. Heckler, M. V. T.M. Bonadiman, R. Schildberg, L. Cividanes, and J. C. S. Lacava, "CAD package to design rectangular probefed microstrip antennas conformed on cylindrical structures," Proc. SBMO/IEEE MTT-S Int. Microwave and Optoelectronics Conf., Vol. 2, 747-752, 2003.

3. Ali, S. M., T. M. Habashy, J. F. Kiang, and J. A. Kong, "Resonance in cylindrical-rectangular and wraparound structures," IEEE Trans. Microwave TheoryT ech., Vol. 37, No. 11, 1773-1783, 1989.
doi:10.1109/22.41044

4. Habashy, T. M., S. M. Ali, and J. A. Kong, "Input impedance and radiation pattern of cylindrical-rectangular and wraparound microstrip antennas," IEEE Trans. Antennas Propagat., Vol. 38, No. 5, 722-731, 1990.
doi:10.1109/8.53500

5. Li, L. W., T. X. Zhao, M. S. Leong, and T. S. Yeo, "A spatial domain method of moments analysis of a cylindrical-rectangular chirostrip," Progress In Electromagnetics Research, Vol. 35, 165-182, 2002.
doi:10.2528/PIER01060503

6. Yin, W. and W. Wang, "Dyadic Green's function of cylindrical multilayered chiral media and its applications," J. Electromagn. Waves Applic., Vol. 7, No. 7, 1005-1027, 1993.

7. Li, L. W., P. S. Kooi, M. S. Leong, and T. S. Yeo, "Analytic representation of scattering dyadic Green's functions coefficients for cylindrically multilayered chiral media," J. Electromagn. Waves Applic., Vol. 9, No. 9, 1207-1221, 1995.

8. Silva, F. D. C., S. B. Fonseca, A. J. M. Soares, and A. J. Giarola, "Analysis of microstrip antennas on circular-cylindrical substrates with a dielectric overlay," IEEE Trans. Antennas Propagat., Vol. 39, No. 9, 1398-1404, 1991.
doi:10.1109/8.99050

9. Wong, K. L., Y. T. Cheng, and J. S. Row, "Resonance in a superstrate-loaded cylindrical-rectangular microstrip structure," IEEE Trans. Microwave TheoryT ech., Vol. 41, No. 5, 814-819, 1993.
doi:10.1109/22.234516

10. Ashkenazy, J., S. Shtrikman, and D. Treves, "Electric surface current model for the analysis of microstrip antennas on cylindrical bodies," IEEE Trans. Antennas Propagat., Vol. 33, No. 3, 295-300, 1985.
doi:10.1109/TAP.1985.1143573

11. Ashkenazy, J.S. Shtrikman, and D. Treves, "Radiation patterns of half-wavelength microstrip elements on cylindrical bodies," Proc. IEEE AP-S Int. Symp., Vol. 23, No. 1, 401-404, 1985.

12. Oliveira, F. S.K. C. Barbosa, and O. M. C. Pereira- Filho, "Analysis of superstrate loaded cylindrical-rectangular microstrip antennas using the electric surface current method," Proc. SBMO/IEEE MTT-S Int. Microwave and Optoelectronics Conf., 657-660, 2005.

13. Harrington, R. F., Time Harmonic Electromagnetic Fields, Mc- Graw-Hill, 1961.

14. Zhang, K. and D. Li, Electromagnetic Theoryfor Microwaves and Optoelectronics, Springer-Verlag, 1998.

15. Tai, C. T., Dyadic Green's Functions in Electromagnetic Theory, Intertext, 1971.

16. Schneider, M. V., "Microstrip dispersion," Proc. IEEE, Vol. 60, No. 1, 144-146, 1972.

17. Schneider, M. V., "Microstrip lines for microwave integrated circuits," Bell Syst. Tech. J., Vol. 48, 1421-1444, 1969.

Dr. Francis Cooray

Dr. John Kot