volume | PIER Journals

Abstract

The moment method technique has been improved to investigate the scattering properties of high Tc Superconducting circular antennas with anisotropic substrate in multi-layered configuration. In this method, the electric field integral equation for a current element on a grounded dielectric slab of infinite extent was developed by basis functions involving Chebyshev polynomials. An improved analytical model is presented taking into account anisotropic substrate, superconducting material for the circular patch and multilayered structure. To validate the theoretical results, an experimental study has been performed for a perfectly conducting circular patch on a single layer, with and without air gap. Good agreements were obtained between our theory and measurements. Effects of temperature and thickness of a superconducting film are also reported and discussed. The performances of high Tc superconducting circular antennas were improved by the use of uniaxial anisotropy substrate and multilayer configuration.

1. Khamas, S. K., M. J. Mehler, T. S. M. Maclean, C. E. Gough, and N. M. Alford, "High-T_c superconducting short dipole antenna," Electronics Letters, Vol. 24, 460-461, 1988.
doi:10.1049/el:19880311 Google Scholar

2. Nisenoff, M. and J. Pond, "Superconductors and microwaves," Microwave Magazine, 10.1109/MMM.2009.932077, 2009. Google Scholar

3. Kumar, G., Broadband Microstrip Antennas, Artech House, Boston, London, 2003, ISBN: 1-58053-244-6.

4. Losada, V., R. R. Boix, and M. Horno, "Resonant modes of circular micristrip patches in multilayered substrates," IEEE Transactions on Microwave Theory and Techniques, Vol. 47, No. 10, 488-498, 2000. Google Scholar

5. Bouttout, F., F. Benabdelaziz, A. Benghalia, D. Khedrouche, and T. Fortaki, "Uniaxialy anisotropic substrate effects on resonance of rectangular microstrip patch antenna," Electronics Letters, Vol. 35, No. 4, 255-256, 1999.
doi:10.1049/el:19990026 Google Scholar

6. Barkat, O. and A. Benghalia, "Synthesis of superconducting circular antennas placed on circular array using a particle swarm optimisation and the full-wave method," Progress In Electromagnetics Research B, Vol. 22, 103-119, 2010.
doi:10.2528/PIERB10042404 Google Scholar

7. Pozar, D. M., "Considerations for millimeter wave printed antennas," IEEE Transactions on Antennas and Propagation, Vol. 31, 740-747, 1983.
doi:10.1109/TAP.1983.1143124 Google Scholar

8. Hansen, R. C., Electrically Small, Superdirective, and Superconducting Antennas, John Wiley & Sons, Inc., Hoboken, New Jersey, 2006.
doi:10.1002/0470041048

9. Chebbara, F., S. Benkouda, and T. Fortaki, "Fourier transform domain analysis of high T_c superconducting rectangular microstrip patch over ground plane with rectangular aperture," Journal of Infrared, Millimeter, and Terahertz Waves, Vol. 31, No. 881-832, Springer, 2010. Google Scholar

10. Benmeddour, F., F. Benabdelaziz, F. Bouttout, and N. Aouabdia, "Resonance characteristics of circular microstrip antennas using moment method and various current representations," First International Symposium on Control, Communications and Signal Processing, 10.1109/ISCCSP.2004.1296296, 339-342, 2004. Google Scholar

11. Chew, W. C. and J. A. Kong, "Resonance of non axial symmetric modes in circular micro strip disk," Mathematical Physics, Vol. 21, No. 10, 2590-2598, 1980.
doi:10.1063/1.524366 Google Scholar

12. Nghiem, D., J. T. Williams, and D. R. Jackson, "A general analysis of propagation along multiple-layer superconducting stripline and microstrip transmission lines," IEEE Transactions Microwave Theory and Techniques, Vol. 39, No. 9, 1553-1565, 1991.
doi:10.1109/22.83831 Google Scholar

13. Richard, M. A., K. B. Bhasin, and P. C. Claspy, "Superconducting microstrip antennas: An experimental comparison of two feeding methods," IEEE Transactions on Antennas and Propagation, Vol. 41, No. 7, 967-974, 1993.
doi:10.1109/8.237630 Google Scholar

14. How, H., R. G. Seed, C. Vittoria, D. B. Chrisey, J. S. Horwitz, C. Carosella, and V. Folen, "Microwave characteristics of high T_c superconducting coplanar waveguide resonator," IEEE Transactions on Microwave Theory and Techniques, Vol. 40, No. 8, 1668-1673, 1992.
doi:10.1109/22.149546 Google Scholar

15. Lee, K. F., K. Yho, and J. S. Dahel, "Circular-disk microstrip antenna with an air gap," IEEE Transactions on Antennas and Propagation, Vol. 32, No. 8, 1984. Google Scholar

16. Guha, D., "Resonant frequency of circular microstrip antennas with and without air gaps," IEEE Transactions on Antennas and Propagation, Vol. 49, No. 1, 2001.
doi:10.1109/8.910530 Google Scholar

17. Gürel, Ç. S., E. Aydın, and E. Yazgan, "Computation and optimisation of resonant frequency and input impedance of coax-fed circular patch microstrip antenna," Microwave and Optical Technology Letters, Vol. 49, No. 9, 2007. Google Scholar

18. Dahel, J. S. and K. F. Lee, "Theory and experiment on microstrip antenna with air-gap," IEEE Proceeding, Vol. 132, No. 7, 455-460, 1985. Google Scholar

19. Fortaki, T., S. Benkouda, M. Amir, and A. Benghalia, "Air gap tuning effect on the resonant frequency and half-power bandwidth of superconducting microstrip patch," PIERS Online, Vol. 5, No. 4, 350-354, 2009.
doi:10.2529/PIERS081011143520 Google Scholar

Dr. Fadila Benmeddour

Dr. Christophe Dumond

Dr. Fatiha Benabdelaziz

Dr. Farid Bouttout