Wideband Two-Section Branch-Line Coupler Using Microstrip Technique | ||
| Menoufia Journal of Electronic Engineering Research | ||
| Article 56, Volume 28, ICEEM2019-Special Issue, 2019, Pages 189-193 | ||
| Document Type: Original Article | ||
| DOI: 10.21608/mjeer.2019.77011 | ||
| Authors | ||
| Ramy Mohammad Khattab; Abdel-Aziz Taha Shalaby | ||
| dept. of electronics and communication engineering faculty of electronic engineering menofia university Menouf, Egypt | ||
| Abstract | ||
| This paper introduces a compact quadrature hybrid coupler for wideband applications. Using the conventional technique of cascading two sections in a quadrature hybrid we designed a broadband coupler at a central frequency of 1.8 GHz. To improve the performance of this coupler and to reduce its size we used the artificial transmission line concept, microstrip line loaded with shunt open ended stubs, and meandering lines. A size reduction of about 31% was achieved compared to the conventional one. The proposed design has a relative bandwidth of 33.3 %, and return loss and isolation loss are both better than 18 dB on the entire band. The proposed coupler has been simulated using the CST Studio suite, fabricated, and measured. A good agreement has been obtained between the simulated and measured results. | ||
| Keywords | ||
| Broadband coupler; CST Studio suite; open ended stubs; compact quadrature hybrid | ||
| References | ||
|
[1] D. M. Pozar, Microwave Engineering, 4th ed., New York: Wiley, 2012.
[2] Y.-H. Chun and J.-S. Hong, "Compact wideband branch-line hybrids", IEEE Trans. Microwave Theory Tech., 2006, vol. 54, no. 2, pp. 704 -709.
[3] C. W. Tang, M. G. Chen, Y. S. Lin, and J. W. Wu, "Broadband microstrip branch-line coupler with defected ground structure", Electron. Lett., 2006, vol. 42, no. 25, pp. 1458 -1460.
[4] F. Hassam and S. Boumaiza, "Microstrip line based compact wideband branch-line coupler - lumped distributed element transformation", in Canadian Conference on Electrical and Computer Engineering (CCECE), May 2008, pp. 1007 - 1010.
[5] T. Kawai, H. Taniguchi, I. Ohta, and A. Enokihara, "Broadband branch-line coupler with arbitrary power split ratio utilizing microstrip series stubs", in 40th Eur. Microwave. Conf. Dig., 2010, pp. 1170 -1173.
[6] W. A. Arriola, J. Y. Lee, and I. S. Kim, "Wideband 3 dB branch-line coupler based on λ/4 open circuited coupled lines", IEEE Microwave Wireless Comp. Lett., 2011, vol. 21, no. 9, pp. 486 -488.
[7] W. Arriola and I. Kim, "Wideband branch-line coupler with arbitrary coupling ratio", Microwave Conference Proceedings (APMC), 2011, pp. 1758 –1761. [8] S. Lee and Y. Lee, "Wideband branch-line couplers with single-section quarter-wave transformers for arbitrary coupling levels", IEEE Microwave. Wireless Comp. Lett., 2012, vol. 22, no. 1, pp. 19 -21.
[9] Q. Wu, Y. Yang, M. Lin, and X. Shi, "Miniaturized broadband branch-line coupler", Microwave Opt. Technol. Lett., 2014, vol. 56, no.3, pp. 740 -743.
[10] H. Yoon and B. Min, “Two Section Wideband 90° Hybrid Coupler Using Parallel-Coupled Three-Line,” IEEE Microwave and Wireless Components Letters, vol. 27, no. 6, pp. 548-550, June 2017.
[11] R. M. Khattab and A. T. Shalaby, “Compact wideband quadrature hybrid based on microstrip technique”, International Journal of Engineering Research and Technology (IJERT), vol. 5, issue 2, pp. 535-539, Feb. 2016.
[12] S. Kumar, C. Tannous, and T. Danshin, "A multisection broadband impedance transforming branch-line hybrid", IEEE Trans. Microwave Theory Tech., Nov.1995, vol. MTT-43, pp. 2517-2523.
[13] K. W. Eccleston and S. H. M. Ong, "Compact planar microstrip line branch-line and rat-race couplers", IEEE Trans. Microwave Theory Tech., Oct. 2003, vol. MTT-51, pp. 2119-2125. | ||
|
Statistics Article View: 498 |
||
