DESIGN, SIMULATION AND REALIZATION OF A COMPACT DUAL BAND MEANDERED COUPLER
DOI:
https://doi.org/10.4314/jfas.v11i3.16Keywords:
meandered line; miniature size; dual-band; directional coupler; microstrip.Abstract
Telecommunication systems increasingly require the use of miniaturized passive microwave components. One of these is the directional coupler, a four-port component intended to distribute power to two output ports, the fourth port being isolated. This paper proposes a dual-band branch-line coupler (BLC) with an extremely compact microstrip structure. The application of meandering lines as the coupler’s central connector yields dual-band operation. HFSS is used to optimize the device and to verify its transmission characteristics. This yields a design of a coupler with a footprint is 23×34.6 mm², operating at 1.65 / 3.30 GHz, with ports that can be adapted to a load impedance of 50 Ohm. To validate the model, the coupler is fabricated using microstrip technology on a FR4 substrate. A good agreement between measurement and simulation results is obtained. The coupler achieves an excellent isolation of –42.41 dB and a transmission loss of only –2.29 dB at 3.30 GHz.
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References
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[8] Zhang H, Chen KJ. A stub tapped branch-line coupler for dual-band operations. IEEE Microwave Wireless Compon Lett., 2007, Feb, 17(2)
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[11] Collado C, Grau A, Flaviis FD. Dual-band planar quadrature hybrid with enhanced bandwidth response. IEEE Trans Microwave Theory Tech., 2006, 54, 180-188
[12] Monti G, Tarricone L. Dual-band articial transmission lines branch-line coupler. Inter Journal of RF and Microwave Computer-Aided Engineering. 2007
[13] Jizat N M, Rahim SKA, Rahman TA, Ka-marudin MR. Miniaturize size of dual band branch-line coupler by implementing reduced series arm of coupler with stub loaded. Microwave and Optical Technology Letters., 2011, 53 (4)
[14] Mongia RK, Bahl IJ, Bhartia P, Hong J. RF and Microwave Coupled-Line Circuits. 2nd ed. Norwood. MA 02062: Artech House., 2007, INC, pp. 111-200
[15] Samuel. Liao Y. Microwave Devices and Circuits. 3rd ed. Prentice Hall. Englewood Cliffs., USA, New Jersey 07632, 1990, pp. 150-160
[16] Liang Sun, Yin-Zeng Yin, Xu Lei, Vivian Wong. A novel miniaturized branch-line coupler with equivalent transmission lines. Progress In Electromagnetics Research Letters., 2001, 38, 35-44
[17] Kyo-Soon Choi, Ki-Cheol Yoon, Jae-Yeong Lee, Choul-Ki Lee, Seong-Cheol Kim, Ki-Byoung Kim, and Jong-Chul Lee. Compact branch-line coupler with harmonics supression using meander T-shaped line. Microwand optical tech let., 2014, 56 (6)
[18] Jianqiang Gong. Changhong Liang, Bian Wu ; Compact dual-band 90± couplers with CUS- tomizable power division ratios utilizing SCRLH transmission lines. Progress In Electromagnetics Research C., 2001, 36, 29-40
[19] Yu Cao, Jincai WenHui Hong, Jun Liu. Design of planar dual-band branch-line coupler with π-Shaped coupled lines. Progress In Electromagnetics Research Letters., 2001, 55, 113-120
[20] Maktoomi M. A, Mohammad S, Hashmi, Fadhel M, Ghannouchi. A Dual-Band Port-Extended Branch-Line Coupler and Mitigation of the Band-Ratio and Power Division Limitations. IEEE Trans on components, packaging and manuf tech., 2017, 7: 1313-1323
[2] Lippmann BA. Theory of directional couplers. MIT. Rad. Lab., 1945, Dec, Rep. 860
[3] Pozar DM. Microwave engineering. 4rd ed, John Wiley & Sons., Inc, USA, Amherst. 2011, pp. 320-379
[4] Cheng KK M, Wong FL. A novel approach to the design and implementation of dual-band compact planar 90 branch-line coupler. IEEE Trans. Microw Theory Tech., 2004, 52 (11), 2458-2463
[5] Abdalla MA, Hu Z. On the study of left_handed coplanar waveguide coupler on ferrite substrate. Progress in Electromagnetics Research Lett., 2008, 1, 69-75
[6] Lin IH, DeVincentis M, Caloz, Itoh. Arbitrary dual-band components using composite right/left-handed transmission lines. IEEE Trans Microw Theory Tech., 2004, 52 (4), 1142-1149
[7] Park MJ, and Lee B. Dual-band, cross coupled branch line coupler. IEEE Microw Wireless Compon. Lett., 2005, 15(10), 655-657
[8] Zhang H, Chen KJ. A stub tapped branch-line coupler for dual-band operations. IEEE Microwave Wireless Compon Lett., 2007, Feb, 17(2)
[9] Leung Wong F, Cheng K-KM. A novel planar branch-line coupler design for dual-band applications. IEEE MTT-S Int Microwave Symp Dig, Fort Worth, TX., 2004, 2, 903-906
[10] Hsu CL, Kuo JT. Design of dual-band branch line couplers with circuit miniaturization. Asia Pacic Microwave Conference. 2008, 16(20)
[11] Collado C, Grau A, Flaviis FD. Dual-band planar quadrature hybrid with enhanced bandwidth response. IEEE Trans Microwave Theory Tech., 2006, 54, 180-188
[12] Monti G, Tarricone L. Dual-band articial transmission lines branch-line coupler. Inter Journal of RF and Microwave Computer-Aided Engineering. 2007
[13] Jizat N M, Rahim SKA, Rahman TA, Ka-marudin MR. Miniaturize size of dual band branch-line coupler by implementing reduced series arm of coupler with stub loaded. Microwave and Optical Technology Letters., 2011, 53 (4)
[14] Mongia RK, Bahl IJ, Bhartia P, Hong J. RF and Microwave Coupled-Line Circuits. 2nd ed. Norwood. MA 02062: Artech House., 2007, INC, pp. 111-200
[15] Samuel. Liao Y. Microwave Devices and Circuits. 3rd ed. Prentice Hall. Englewood Cliffs., USA, New Jersey 07632, 1990, pp. 150-160
[16] Liang Sun, Yin-Zeng Yin, Xu Lei, Vivian Wong. A novel miniaturized branch-line coupler with equivalent transmission lines. Progress In Electromagnetics Research Letters., 2001, 38, 35-44
[17] Kyo-Soon Choi, Ki-Cheol Yoon, Jae-Yeong Lee, Choul-Ki Lee, Seong-Cheol Kim, Ki-Byoung Kim, and Jong-Chul Lee. Compact branch-line coupler with harmonics supression using meander T-shaped line. Microwand optical tech let., 2014, 56 (6)
[18] Jianqiang Gong. Changhong Liang, Bian Wu ; Compact dual-band 90± couplers with CUS- tomizable power division ratios utilizing SCRLH transmission lines. Progress In Electromagnetics Research C., 2001, 36, 29-40
[19] Yu Cao, Jincai WenHui Hong, Jun Liu. Design of planar dual-band branch-line coupler with π-Shaped coupled lines. Progress In Electromagnetics Research Letters., 2001, 55, 113-120
[20] Maktoomi M. A, Mohammad S, Hashmi, Fadhel M, Ghannouchi. A Dual-Band Port-Extended Branch-Line Coupler and Mitigation of the Band-Ratio and Power Division Limitations. IEEE Trans on components, packaging and manuf tech., 2017, 7: 1313-1323
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Published
2019-07-26
How to Cite
EL BOUSLEMTI, R.; SALAH-BELKHODJA, F. DESIGN, SIMULATION AND REALIZATION OF A COMPACT DUAL BAND MEANDERED COUPLER. Journal of Fundamental and Applied Sciences, [S. l.], v. 11, n. 3, p. 1279–1291, 2019. DOI: 10.4314/jfas.v11i3.16. Disponível em: https://jfas.info/index.php/JFAS/article/view/200. Acesso em: 30 jan. 2025.
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