volume | PIER Journals

Abstract

This paper presents the investigations of nonreciprocal devices employing a novel ferrite coupled line junction. The structure is designed using coplanar line technology with the ground half-planes reduced to the strips. The investigated junction is composed of one ferrite section placed in between of two dielectric sections. In the ferrite section the longitudinally magnetized ferrite slab is located at the top or the bottom of the strips and is covered with the dielectric layers. In the dielectric sections the ports of the junctions are located. The wave parameters and field distributions of the modes propagated in the dielectric and ferrite sections are obtained from spectral domain approach. In order to determine the scattering matrix of the junction the mode matching method is utilized. The investigation of the circulator and isolator designed based on the S-matrix of the junction are presented. The obtained results are verified by comparing them with HFSS simulations and own measurements of the fabricated devices. In both cases a very good agreement is observed.

1. Mazur, J. and M. Mrozowski, "On the mode coupling in longitudinally magnetized waveguiding structures," IEEE Transactions on Microwave Theory and Techniques, Vol. 37, No. 1, 159-164, January 1989.
doi:10.1109/22.20034

2. Cao, M., R. Pietig, H. C. Wu, and R. G. Gossink, "Perturbation theory approach to the ferrite coupled stripline," 2004 IEEE MTT-S International Microwave Symposium Digest, Vol. 3, 1903-1906, May 2004.

3. Queck, C. K. and L. E. Davis, "Microstrip and stripline ferrite-coupled-lines (FCL) circulators," IEEE Transactions on Microwave Theory and Techniques, Vol. 50, No. 12, 291-2917, December 2002.

4. Queck, C. K. and L. E. Davis, "Novel folding technique for planar ferrite-coupled-line circulators," IEEE Transactions on Microwave Theory and Techniques, Vol. 52, No. 5, 1369-1374, May 2004.
doi:10.1109/TMTT.2004.827000

5. Queck, C. K. and L. E. Davis, "Broad-band three-port and four-port stripline ferrite coupled line circulators," IEEE Transactions on Microwave Theory and Techniques, Vol. 52, No. 2, 625-632, February 2004.
doi:10.1109/TMTT.2003.822024

6. Mazur, J., M. Solecka, R. Poltorak, and M. Mazur, "Theoretical and experimental treatment of a microstrip coupled ferrite line circulator," IEE Proceedings --- Microwaves, Antennas and Propagation, Vol. 151, No. 6, 477-480, December 2004.
doi:10.1049/ip-map:20041047

7. Cao, M. and R. Pietig, "Ferrite coupled-line circulator with reduced length," IEEE Transactions on Microwave Theory and Techniques, Vol. 53, No. 8, 2572-2579, August 2005.
doi:10.1109/TMTT.2005.852760

8. Marynowski, W., A. Kusiek, and J. Mazur, "Microstrip ferrite coupled line isolators," XVI International Microwaves, Radar and Wireless Communications Conference, Vol. 1, 342-345, Krakow, Poland, May 2006.

9. Yang, L.-Y. and K. Xie, "Design and measurement of nonuniform ferrite coupled line circulator," Journal of Electromagnetic Waves and Applications, Vol. 25, No. 1, 131-145, 2011.
doi:10.1163/156939311793898387

10. Marynowski, W., A. Kusiek, and J. Mazur, "Microstrip four-port circulator using a ferrite coupled line section," AEU --- International Journal of Electronics and Communications, Vol. 63, No. 9, 801-808, July 2008.
doi:10.1016/j.aeue.2008.06.008

11. Marynowski, W. and J. Mazur, "Treatment of the three strip coplanar lines on the ferrite," XVII International Microwaves, Radar and Wireless Communications Conference, Vol. 1, 135-138, Wroclaw, Poland, May 2008.

12. Michalski, J., M. Mazur, and J. Mazur, "Scattering in a section of ferrite coupled microstrip lines: Theory and application in nonreciprocal devices," IEE Proceedings --- Microwaves, Antennas and Propagation, Vol. 149, No. 5-6, 286-290, October-December 2002.
doi:10.1049/ip-map:20020571

13. Razavipour, H., R. Safian, G. Askari, F. Fesharaki, and H. Mirmohammad Sadeghi, "A new dual-band high power ferrite circulator," Progress In Electromagnetics Research C, Vol. 10, 15-24, 2009.
doi:10.2528/PIERC09050504

14. Sajin, G., S. Simion, F. Craciunoiu, A. A. Muller, and A. C. Bunea, "CRLH CPW antenna on magnetically biased ferrite substrate," Journal of Electromagnetic Waves and Applications, Vol. 24, No. 5-6, 803-814, 2010.
doi:10.1163/156939310791036232

15. Zahwe, O., B. Sauviac, B. Abdel Samad, J. P. Chatelon, and J. J. Rousseau, "Numerical study of a circulator using YIG thin film with a coplanar structure," Progress In Electromagnetics Research C, Vol. 6, 193-207, 2009.
doi:10.2528/PIERC09020302

16. Zahwe, O., B. Abdel Samad, B. Sauviac, J. P. Chatelon, M. F. Blanc Mignon, J. J. Rousseau, M. Le Berre, and D. Givord, "YIG thin film used to miniaturize a coplanar junction circulator," Journal of Electromagnetic Waves and Applications, Vol. 24, No. 1, 25-32, 2010.
doi:10.1163/156939310790322073

17. Kusiek, A., W. Marynowski, and J. Mazur, "Investigations of the circulation effects in the structure using ferrite coupled slot-line section," Microwave and Optical Technology Letters, Vol. 49, No. 3, 692-696, January 2007.
doi:10.1002/mop.22246

18. Abdalla, M. A. and Z. Hu, "Multi-band functional tunable LH impedance transformer," Journal of Electromagnetic Waves and Applications, Vol. 23, No. 1, 39-47, 2009.
doi:10.1163/156939309787604652

19. Bahri, R., A. Abdipour, and G. Moradi, "Analysis and design of new active quasi circulator and circulators," Progress In Electromagnetics Research, Vol. 96, 377-395, 2009.
doi:10.2528/PIER09072501

20. Marynowski, W. and J. Mazur, "Three-strip ferrite circulator design based on coupled mode method," 2009 International Symposium on Antennas and Propagation (ISAP 2009), 205-208, Bangkok, Thailand, October 2009.

21. Marynowski, W. and J. Mazur, "Investigations of the double isolator using three-strip ferrite coupled line," 15th Conference on Microwave Techniques, COMITE 2010, Brno, Czech Republic, April 2010.

Dr. Wojciech Marynowski

Dr. Jerzy Mazur