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http://dx.doi.org/10.5515/KJKIEES.2009.20.10.1042

Optimization of a Broadband Waveguide Magic-T for X-Band Monopulse Tracking Radars  

Hwang, Keum-Cheol (Department of Electronics Engineering, Dongguk University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.20, no.10, 2009 , pp. 1042-1049 More about this Journal
Abstract
Design and optimization of a broadband waveguide magic-T was performed for X-Band tracking radars. A multi-stepped conducting cylinder was used to enhance the bandwidth performance of the conventional waveguide magic-Ts. Particles swarm optimization in conjunction with genetic algorithm was employed to obtain the optimized geometrical parameters. The optimized design exhibits low reflection coefficient below -20 dB at all waveguide ports with frequency bandwidth of 12%. The transmission loss and difference are within 0.2 dB and 0.1 dB, respectively. Measured results are also shown to be in good agreement with the simulated results. Finally, the bandwidth performances for five and seven-stepped conducting cylinders are also investigated.
Keywords
Waveguide Magic-T; Monopulse Comparator; Hybrid Particle Swarm Optimization;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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1 A. Gandelli, F. Grimaccia, M. Mussetta, P. Pirinoli, and R. E. Zich, "Genetical swarm optimization: an evolutionary algorithm for antenna design", Automatika., vol. 47, no. 3-4, pp. 105-112, Dec. 2006   ScienceOn
2 J. Ritter, F. Arndt, "Efficient FDTD/matrix pencil method for the full-wave scattering parameter analysis of waveguiding structures", IEEE Trans. Microw. Theory Tech., vol. 44, no. 12, pp. 2450-2456, Dec. 1996   DOI   ScienceOn
3 Z. Shen, C. L. Law, and C. Qian, "Hybrid finite- element-modal-expansion method for matched magic T-junction", IEEE Trans. Magn., vol. 38, no. 2, pp. 385-388, Mar. 2002   DOI   ScienceOn
4 A. A. San Blas, F. Mira, V. E. Boria, B. Gimeno, M. Bressan, and P. Arcioni, "On the fast and rigorous analysis of compensated waveguide junctions using off-centered partial-height metallic posts", IEEE Trans. Microw. Theory Tech., vol. 55, no. 1, pp. 168-175, Jan. 2007   DOI   ScienceOn
5 R. Beyer, U. Rosenberg, "CAD of magic tee with interior stepped post for high performance designs",IEEE-MTTs Int. Microw. Symp. Digest, vol. 2, pp. 1207-1210, Jun. 2003
6 황금철, "Hybrid Particle Swarm Optimization 기법을 적용한 X-대역 광대역 편파 변환기 설계", 한국전자파학회논문지, 20(4), pp. 390-395, 2009년 4월   과학기술학회마을   DOI   ScienceOn
7 S. M. Sherman, Monopulse Principles and Techniques, Artech House, ch. 1, 1984