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Progress In Electromagnetics Research
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ON THE DESIGN OF PATCH ANTENNAS TUNED BY TRANSVERSELY MAGNETIZED LOSSY FERRITE INCLUDING A NOVEL RESONATING MODE

By A. A. Mavridis, G. A. Kyriacou, and J. N. Sahalos

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Abstract:
Circularly symmetric patch antennas tuned by transversely magnetized lossy ferrite are studied. The circular and ring patch geometries printed on ferrite substrate or tuned by ferrite post and ferrite toroid are studied. Both saturated and partially magnetized ferrite are considered. Strong effects on the dispersive properties of modes propagating under the patch and in turn on the antenna resonant frequency and input impedance are observed when the ferrite losses are taken into account. The patch antennas resonance at a novel mode propagating in the traditionally assumed switch-off frequency range of negative effective permeability constitutes an essential original contribution of this work. In all cases the dynamic control of the patch resonant frequency through the DC-biasing field is investigated. The "perfect magnetic walls approximation" was employed in the analysis since it offers a valuable physical insight as well as simplified closed form expressions for the resonant conditions. These are used as engineering design formulas for an initial antenna design, which is in turn fine tuned with the aid of a numerical simulation-optimization scheme. The validity of the present method was verified through comparisons with published experimental results and numerical simulations.

Citation: (See works that cites this article)
A. A. Mavridis, G. A. Kyriacou, and J. N. Sahalos, "On the Design of Patch Antennas Tuned by Transversely Magnetized Lossy Ferrite Including a Novel Resonating Mode," Progress In Electromagnetics Research, Vol. 62, 165-192, 2006.
doi:10.2528/PIER06041301
http://www.jpier.org/PIER/pier.php?paper=0604131

References:
1. Cadieu, F. J., "High coercive field and large remanent moment magnetic films with special anisotropies," J. Appl. Phys., Vol. 61, 4105-4110, 1987.
doi:10.1063/1.338544

2. Mavridis, A. A., G. A. Kyriacou, and J. N. Sahalos, "Analysis of circular patch antenna tuned by a ferrite post," Microwave & Optical Technology Letters, Vol. 46, No. 3, 234-237, 2005.
doi:10.1002/mop.20954

3. Pozar, D. M., "Radiation scattering characteristics of microstrip antennas on normally biased ferrite substrates," IEEE Trans. AP, Vol. 40, No. 9, 1084-1092, 1992.

4. Baccarelli, P., C. Di Nalo, F. Frezza, and P. Lampariello, "Anomalous propagation, loss and radiation effects in open waveguides with gyrotropic media," IEEE MTT-S Digest, Vol. 1, No. 6, 17-21, 1996.

5. Baden-Fuller, A. J., Ferrite at Microwave Frequencies, IEE Publishing, 1987.

6. Pozar, D. M., Microwave Engineering, Third Edition, Wiley, 2005.

7. Lewin, L., Theory of Waveguides, Newnes-Butterworths, 1975.

8. Kyriacou, G. A., A. A. Mavridis, and J. N. Sahalos, "Approximateresonant frequencies of certain antennas printed on magnetized ferrite," URSI Int. Symp. on Electromagnetic Theory, 13-21, 1999.

9. Waldron, R. A., Ferrites: An Introduction for Microwave Engineers, D. Van-Nostrand, 1961.

10. Batchelor, J. C., G. Classen, and R. J. Langley, Microstrip antennas on ferrites, 10th Int. Conference on Antennas and Propagation, No. 436, 1997.

11. Tsang, K. and R. J. Langley, "Annular ring microstrip antennas on biased ferrite substrates," Electronics Letters, Vol. 30, No. 16, 1257-1258, 1994.
doi:10.1049/el:19940869

12. Green, J. J. and F. Sandy, "Microwave characterization of partially magnetized ferrites," IEEE Trans. MTT, Vol. MTT-22, No. 6, 1974.

13. Mavridis, A. A., G. A. Kyriacou, S. Diamantis, and J. N. Sahalos, "On the design of dynamically controlled patch antennas printed on magnetized ferrite substrates for communication applications," COMCON8, 25-29, 2001.

14. Bahl, I. J. and P. Bhartia, Microstrip Antennas, Artech House, Ottawa, 1980.

15. Araki, K., D. I. Kim, and Y. Naito, "A study on circular disk resonators on a ferrite substrate," IEEE Trans MTT, Vol. MTT- 30, No. 2, 147-154, 1982.
doi:10.1109/TMTT.1982.1131040

16. Ansoft, HFSS version 8.0.21, Ansoft Corporation, 1984-2001, copyright 1984-2001., 1984.

17. Matthaei, G., E. M. T. Jones, and L. Young, Microwave Filters, Impedance-Matching Networks and Coupling Structures, Artech House, 1980.


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