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Progress In Electromagnetics Research Letters
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DESIGN OF MINIATURIZED RAT-RACE COUPLERS WITH ARBITRARY POWER DIVISION RATIOS

By X. Yang, Z. Liao, and X.-C. Zhang

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Abstract:
A miniaturized rat-race coupler with arbitrary power division ratio is proposed in this paper. The design formulas of the rat-race coupler with arbitrary power division ratio are derived using the even-odd decomposition analysis. The proposed structure demonstrates miniaturized size and perfect isolation due to adding phase inverter to the branch. For demonstration, a 20 dB rat-race coupler operating at 1 GHz with 81.34% size reduction is designed and fabricated. There is good agreement between measured and simulated results.

Citation:
X. Yang, Z. Liao, and X.-C. Zhang, "Design of Miniaturized Rat-Race Couplers with Arbitrary Power Division Ratios," Progress In Electromagnetics Research Letters, Vol. 74, 83-89, 2018.
doi:10.2528/PIERL17110805

References:
1. Park, M. J. and B. Lee, "Design of ring couplers for arbitrary power division with 50Ω lines," IEEE Microw. Wireless Compon. Lett., Vol. 21, 185-187, 2011.
doi:10.1109/LMWC.2011.2112341

2. Chi, P. L., "Miniaturized ring coupler with arbitrary power divisions based on the composite right/left-handed transmission lines," IEEE Microw. Wireless Compon. Lett., Vol. 22, 170-172, 2012.
doi:10.1109/LMWC.2012.2189376

3. Ho, K. L. and P.-L. Chi, "Miniaturized and large-division-ratio ring coupler using novel transmission-line elements," IEEE Microw. Wireless Compon. Lett., Vol. 24, 35-37, 2014.
doi:10.1109/LMWC.2013.2288261

4. Xu, H.-X., G.-M. Wang, X. Chen, and T.-P. Li, "Broadband balun using fully artificial fractalshaped composite right/left handed transmission line," IEEE Microwave and Components Letters, Vol. 22, No. 1, 16-18, Jan. 2012.
doi:10.1109/LMWC.2011.2173929

5. Hsu, C. L., J. T. Kuo, and C. W. Chang, "Miniaturized dual-band hybrid couplers with arbitrary power division ratios," IEEE Trans. Microw. Theory Tech., Vol. 57, 149-156, 2009.
doi:10.1109/TMTT.2008.2009036

6. Pon, C. Y., "Hybrid-ring directional coupler for arbitrary power divisions," IEEE Trans. Microw. Theory Tech., Vol. 9, 529-535, 1961.
doi:10.1109/TMTT.1961.1125385

7. Zhang, X. C., T. Y. Wang, and Y. B. Xiang, "Wideband three-way out-of-phase microstrip power divider," Electronics Letters, Vol. 51, 404-405, 2015.
doi:10.1049/el.2014.3915

8. Zhang, X. C., C. H. Liang, and J. W. Xie, "Microstrip phase inverter using interdigital strip lines and defected ground," Progress In Electromagnetics Research Letters, Vol. 29, 167-173, 2012.
doi:10.2528/PIERL11121403

9. Liao, Z. H., X. C. Zhang, and T. Y. Wang, "A novel dual-frequency phase inverter," IEEE International Conference on Ubiquitous Wireless Broadband, 1-2, 2016.

10. Liao, Z. H. and X. C. Zhang, "Reconfigurable phase inverter with switchable frequency," Electronics Letters, Vol. 53, 353-354, 2017.
doi:10.1049/el.2016.2587


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