Design of Planar Directional Coupler using 2-Bit Fragment Structures

Authors

  • Yonghui Tao Department of Electronic and Information Engineering Jinling Institute of Technology, Nanjing, 211169, China
  • Wenjuan Zhang Department of Electronic Engineering and Information Science University of Science and Technology of China, Hefei, 230027, China Antenna Design University, City, State Code Zip Code, Country
  • Johan Sidén Department of Electronics Design Mid Sweden University, SE-851 70 Sundsvall, Sweden
  • Gang Wang Department of Electronic Engineering and Information Science University of Science and Technology of China, Hefei, 230027, China Antenna Design University, City, State Code Zip Code, Country

DOI:

https://doi.org/10.13052/2021.ACES.J.361213

Keywords:

Directional coupler, fragment-type, directivity, modeling, optimization

Abstract

Automatic design of planar directional coupler can be implemented by multi-objective optimization searching for the optimal planar fragment-type structure (FTS). The 2-bit FTS description scheme may include necessary fine structures in fragments to enhance the FTS design. By coding the coupler design space on PCB in 2-bit FTS, defining the FTS design matrix, and searching for the optimal structure, directional coupler can be designed without any structure presetting or artificial intervention. The scheme is demonstrated by designing 10-dB wideband directional coupler with 2-bit FTS scheme. The designed directional couplers are fabricated and tested to show maximum directivity of 58 dB with 36% operation bandwidth.

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Author Biographies

Yonghui Tao, Department of Electronic and Information Engineering Jinling Institute of Technology, Nanjing, 211169, China

Yonghui Tao received the Ph.D. degree from University of Science and Technology of China, Hefei, China, in 2014. From 2015 to 2017, she worked at University of Science and Technology of China as a Postdoctoral Research Fellow supported by the Chinese government.

She is currently an instructor with Jinling Institute of Technology. Her research interests involve radio-frequency identification, microwave hyperthermia, metamaterials and its applications in biomedical engineering.

Wenjuan Zhang, Department of Electronic Engineering and Information Science University of Science and Technology of China, Hefei, 230027, China Antenna Design University, City, State Code Zip Code, Country

Wenjuan Zhang received the B.S. degree from Xidian University, Xi’an, China, in 2016. She is currently pursuing the Ph.D. degree in electrical engineering with the University of Science and Technology of China, Hefei, China. Her research interests include microwave/RF circuit theory and design technique, RFID, and sensor design.

Johan Sidén, Department of Electronics Design Mid Sweden University, SE-851 70 Sundsvall, Sweden

Johan Sidén (M’00) received the M.Sc. degree in telecommunication, the Licentiate of Technology degree in electronics, and the Ph.D. degree in electronics from Mid Sweden University, Sundsvall, Sweden, in 2000, 2004, and 2007, respectively.

He is currently an Associate Professor with Mid Sweden University. His current research interests include radio-frequency identification technology, wireless sensor networks, antenna technology, printed passive electronic systems, and optical fiber installationsystems.

Gang Wang, Department of Electronic Engineering and Information Science University of Science and Technology of China, Hefei, 230027, China Antenna Design University, City, State Code Zip Code, Country

Gang Wang (M’98) received the B.S. degree from the University of Science and Technology of China, Hefei, China, in 1988, and the M.S. and Ph.D. degrees in electrical engineering from Xidian University, Xi’an, China, in 1991 and 1996, respectively.

From 1996 to 1998, he was with Xi’an Jiaotong University, as a Postdoctoral Research Fellow, supported by the Chinese Government. From 1998 to 2000, he was an Associate Professor with Xi’an Jiaotong University. In 2001, he was a Visiting Researcher with the Department of ITM, Mid-Sweden University. From 2002 to 2003, he was a Postdoctoral Research Associate with the Department of Electrical and Computer Engineering, University of Florida. From 2003 to 2010, he was with Jiangsu University, China, as a Chair Professor. He is currently a Full Professor with the University of Science and Technology of China. His current research interests include autonomous driving, RFID/sensor technology, and microwave circuit, and antennadesign.

References

M. K. Krage and G. I. Haddad, “Characteristics of coupled microstrip transmission lines-I: Coupled-mode formulation of inhomogeneous lines,” IEEE Trans. Microw. Theory Tech., vol. 18, no. 4, pp. 217-222, Apr. 1970.

C. Liu, T. Yang, K. Huang, and W. Menzel, “Compact capacitive compensated directional coupler using planar artificial transmission lines,” Electron. Lett., vol. 47, no. 24, pp. 1321-1323, Nov.2011.

J. Ha, W. Shin, and Y. Lee, “An inductive-loading method for directivity enhancement of microstrip coupled-line couplers,” IEEE Microwave and Wireless Components Letters., vol. 27, no. 4, pp. 356-358, Apr. 2017.

R. Phromloungsri, M. Chongcheawchamnan, and I. D. Robertson, “Inductively compensated parallel coupled microstrip lines and their applications,” IEEE Trans. Microw. Theory Techn., vol. 54, no. 9, pp. 3571-3582, Sep. 2006.

M. Akhtar M, M. Zakir, and H. Cheema, “Weakly coupled directional coupler with simultaneous wide bandwidth and high directivity,” Microw Opt Technol Lett., vol. 61, pp. 1259-1262, 2019.

D. Jaisson, “Multilayer microstrip directional coupler with discrete coupling,” IEEE Trans. Microw. Theory Techn., vol. 48, no. 9, pp. 1591-1595, Sep. 2000.

A. Pourzadi, A. R. Attari, and M. S. Majedi, “A directivity-enhanced directional coupler using epsilon negative transmission line,” IEEE Trans. Microw. Theory Techn., vol. 60, no. 11, pp. 3395-3402, 2012.

B. S. Yıldırım and K. Karayahşi, “Broadband UHF directional coupler with high directivity,” Fifth International Electromagnetic Compatibility Conference (EMC Turkiye), Sep. 2019.

A. Agharasuli, M. K. Mehr, O. Manoochehri, and D. Erricolo, “UWB stripline coupler with low loss and ripple,” Proc. International Conference on Electromagnetics in Advanced Applications (ICEAA), Sep. 2019.

P. Mondal and S. Parui, “Multi-mode resonator based asymmetric broadband 10db directional coupler,” 3rd International Conference on Microwave and Photonics (ICMAP), Feb. 2018.

J. Shi, X. Y. Zhang, K. W. Lau, J. X. Chen, and Q. Xue, “Directional coupler with high directivity using metallic cylinders on microstrip line,” Electron. Lett., vol. 45, no. 8, pp. 415-417, Apr.2009.

L. Wang, G. Wang, and J. Siden, “Design of high-directivity wideband microstrip directional coupler with fragment-type structure,” IEEE Trans. Microw. Theory Tech., vol. 63, no. 12, pp. 3962-3970, Oct. 2015.

W. Zhang and G. Wang, “Design of compact planar lowpass filters by using fragment-type structure with multi-bit scheme,” IEEE Access, vol. 9, pp. 74143-74154, 2021.

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Published

2022-03-10

How to Cite

[1]
Y. . Tao, W. . Zhang, J. . Sidén, and G. . Wang, “Design of Planar Directional Coupler using 2-Bit Fragment Structures”, ACES Journal, vol. 36, no. 12, pp. 1610–1615, Mar. 2022.

Issue

2021: Vol 36 Iss 12

Section

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