PIER
 
Progress In Electromagnetics Research
ISSN: 1070-4698, E-ISSN: 1559-8985
Home | Search | Notification | Authors | Submission | PIERS Home | EM Academy
Home > Vol. 57 > pp. 33-54

FIELD STRUCTURES OF WAVEGUIDE JUNCTION CIRCULATORS WITH IRREGULAR SHAPED FERRITE SIMULATED BASED ON EXACT TREATMENT

By H. C. Wu and W.-B. Dou

Full Article PDF (871 KB)

Abstract:
Field structures of waveguide Y-junction circulators containing irregular shaped ferrite material, such as Y-junction with partial-height cylinder/triangle ferrite posts and metal step impedance transformer, Y-junction with a ferrite sphere, and dual higher order modes circulator, which are classified as different junction resonance modes, are depicted to illustrate the circulating process. The analysis method used is a combination of the mode expansion method and finite element method, which is based on the weak form of Helmholtz equation. Calculated results (return loss, insertion loss and isolation) of these structures are shown and compared respectively to those in literatures. Consistencies have been observed.

Citation: (See works that cites this article)
H. C. Wu and W.-B. Dou, "Field Structures of Waveguide Junction Circulators with Irregular Shaped Ferrite Simulated Based on Exact Treatment," Progress In Electromagnetics Research, Vol. 57, 33-54, 2006.
doi:10.2528/PIER05071102
http://www.jpier.org/PIER/pier.php?paper=0507112

References:
1. EL-Shandwily, M. E., A. A. Kamal, and E. A. F. Abdallah, "General field theory treatment of H-plane waveguide junction circulators," IEEE Trans. Microwave Theory Tech., Vol. 21, No. 6, 392-403, 1973.
doi:10.1109/TMTT.1973.1128013

2. Dou, W. B. and Z. L. Sun, "Millimeter wave ferrite circulator and rotator," Int. J. Infrared & MMW, Vol. 17, No. 12, 2035-2131, 1996.
doi:10.1007/BF02069488

3. Akaiwa, Y., "Mode classification of a triangular ferrite post for Y-circulator operation," IEEE Trans. Microwave Theory Tech., Vol. 25, No. 1, 59-61, 1977.
doi:10.1109/TMTT.1977.1129032

4. Khilla, A. M. and I. Wolff, "Field theory treatment of H-plane waveguide junction with triangular ferrite post," IEEE Trans. Microwave Theory Tech., Vol. 26, No. 4, 279-287, 1978.
doi:10.1109/TMTT.1978.1129365

5. Okamoto, N., "Computer-aided design of H-plane waveguide junction with full-height ferrite of arbitrary shape," IEEE Trans. Microwave Theory Tech., Vol. 27, No. 4, 315-321, 1979.
doi:10.1109/TMTT.1979.1129622

6. Koshiba, M. and M. Suzuki, "Finite-element analysis of H-plane waveguide junction with arbitrarily shaped ferrite post," IEEE Trans. Microwave Theory Tech., Vol. 34, No. 1, 103-109, 1986.
doi:10.1109/TMTT.1986.1133286

7. Hu, S. X. and W. B. Dou, "FDTD analysis of several waveguide junction circulators with full-height ferrite of arbitrary shape," Int. J. RF and Microwave CAE, Vol. 14, No. 4, 153-165, 2004.
doi:10.1002/mmce.10131

8. Peterson, A. F. and S. P. Castillo, "A frequency-domain differential equation formulation for electromagnetic scattering from inhomogeneous cylinders," IEEE Trans. Antennas Propag., Vol. 37, No. 5, 601-607, 1989.
doi:10.1109/8.24188

9. Wu, H. and W. Dou, "Analysis of waveguide multi-ports discontinuities by the Helmholtz weak form and mode expansion," IEEE Proc. Microw. Antennas Propag., Vol. 151, No. 12, 530-536, 2004.
doi:10.1049/ip-map:20040895

10. Yung, E. K. N., R. S. Chen, K. Wu, and D. X. Wang, "Analysis and development of millimeter-wave waveguide-junction circulator with a ferrite sphere," IEEE Trans. Microwave Theory Tech., Vol. 46, No. 11, 1721-1734, 1998.
doi:10.1109/22.734570

11. Jin, J. M., The Finite Element Method of Electromagnetism, Xi'dian University Press, 2001.


© Copyright 2014 EMW Publishing. All Rights Reserved