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Masoudinejad, S., Montaseri, N., Qaneh Qarehbagh, Y. (2019). Design and Optimization of a Three-Port Waveguide Circulator. Electronic and Cyber Defense, 10(3), 279-286.
Shayan Masoudinejad; Nasser Montaseri; Yaqob Qaneh Qarehbagh. "Design and Optimization of a Three-Port Waveguide Circulator". Electronic and Cyber Defense, 10, 3, 2019, 279-286.
Masoudinejad, S., Montaseri, N., Qaneh Qarehbagh, Y. (2019). 'Design and Optimization of a Three-Port Waveguide Circulator', Electronic and Cyber Defense, 10(3), pp. 279-286.
Masoudinejad, S., Montaseri, N., Qaneh Qarehbagh, Y. Design and Optimization of a Three-Port Waveguide Circulator. Electronic and Cyber Defense, 2019; 10(3): 279-286.

Design and Optimization of a Three-Port Waveguide Circulator

علوم و فناوریهای پدافند نوین
Article 8, Volume 10, Issue 3 - Serial Number 37, July 2019, Pages 279-286    PDF (1.39 M)
Document Type: -
Authors
Shayan Masoudinejad1; Nasser Montaseri* 2; Yaqob Qaneh Qarehbagh1
1Imam Hossein Comprehensive University
2Shahed University
Receive Date: 10 June 2018,  Revise Date: 22 October 2018,  Accept Date: 13 January 2019 
Abstract
In this paper, the design, simulation, and optimization of a three-port waveguide circulator for microwave applications in X-band frequency with low insertion and reflection losses are investigated. To operate this circulator in high power application, the design is based on the waveguide structure. The ferrite design and its location are outlined while designed and fabricated circulator has a wide band frequency range in comparison to the conventional structures. It should be noted that the design and optimization procedure are completely considered. The fabricated circulator has the input standard WR-90 flange at the center frequency of 9.4 GHz and the frequency band width, minimum isolation, and maximum insertion loss are about 4%, 20 dB, and 0.25 dB, respectively. Finally, the results of simulation and measurements are compared together and close accordance is observed between them.
Keywords
Three-port waveguide circulator; Ferrite
References

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[3]     Chait, H. N.; Curry, T. R. “A New Type Y-Circulator”; J. Appl. Phys. Suppl. 1959, 30, 1525 -1535.

 [4]     Davis, L. E.; Coleman, M. D.; Cotter, J. J. “Four-port Crossed Waveguide Junction Circulators”; IEEE Trans. Microw. Theory Techn. 1964, 12, 43 -47.   

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[8]     Fay, C. E.; Comstock, R. L. “Operation of the Ferrite Junction Circulator”; IEEE Trans. Microw. Theory Techn. 1965, 13, 15 -27.               

[9]     Tanaka, S.; Shimomura, N.; Ohtake, K. “Active Circulators: The Realization of Circulators Using Transistors”; Proc. IEEE 1965, 53, 260 -267.            

[10]  Estep, N. A.; Sounas, D. L.; Alu, A. “Magnetless Microwave Circulators Based on Spatiotemporally Modulated Rings of Coupled Resonators”; IEEE Trans. Microw. Theory Techn. 2016, 64, 502 -518.          

[11]  Davies, J. Β. “An Analysis of the M-port Symmetrical H-plane Waveguide Junction with Central Ferrite Post”; IEEE Trans. Microw. Theory Techn. 1962, 10, 596 -604.   

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[13]  Davis, L. E. “Theoretical Design of Static and Latching Ferrite 3-Port and 4-Port Symmetrical Waveguide Circulators”; Symposium on Microwave, Palo Alto, 1966, 281- 285.      

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