Ultra-wideband Planar Magic-T using Interlayer Coupling 3 dB Directional Coupler and Branch-loaded Phase Shifter

Authors

  • Yanzhen Shi Shanghai Collaborative Innovation Center of Intelligent Sensing Chip Technology School of Communication and Information Engineering, Shanghai University, Shanghai 200444, China
  • Dapeng Chu Shanghai Collaborative Innovation Center of Intelligent Sensing Chip Technology School of Communication and Information Engineering, Shanghai University, Shanghai 200444, China
  • Yongjin Zhou 1) Shanghai Collaborative Innovation Center of Intelligent Sensing Chip Technology School of Communication and Information Engineering, Shanghai University, Shanghai 200444, China 2) State Key Laboratory of Millimeter Waves, School of Information Science and Engineering Southeast University, Nanjing 210096, China 3) Shaanxi Key Laboratory of Artificially-Structured Functional Materials and Devices Air Force Engineering University, Xi’an 710051, China

DOI:

https://doi.org/10.13052/2024.ACES.J.390803

Keywords:

Coupler, magic-T, phase shifter, ultra-wideband

Abstract

In this paper, we propose an ultra-wideband magic-T operating in the frequency band from 1.2 to 4 GHz with a relative bandwidth of 108%, which is based on an interlayer coupling 3 dB directional coupler and a branch-loaded 90∘ phase shifter. Compared to traditional magic-T structures, it can operate within an ultra-wideband range and has the advantages of a simple structure and easy processing. Simulation and experimental results demonstrate excellent amplitude and phase stability. When the input is at the sum port, the phase error at each output port is less than 2.8∘. For the difference port input, the phase error at each output port is less than 7.6∘. Furthermore, the overall amplitude imbalance is less than 2.1 dB, the transmission coefficient is below −7.4 dB, and the isolation is greater than 11 dB. It can be used in ultra-wideband phased array systems to generate sum-and-difference beams for direction finding.

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Author Biographies

Yanzhen Shi, Shanghai Collaborative Innovation Center of Intelligent Sensing Chip Technology School of Communication and Information Engineering, Shanghai University, Shanghai 200444, China

Yanzhen Shi received bachelor’s degree in communication engineering from Shanghai Normal University, Shanghai, China, in 2021. She is currently pursuing the master’s degree in communication and information system at Shanghai University. Her research interests include phased array antenna, direction of arrival estimation and radar detection.

Dapeng Chu, Shanghai Collaborative Innovation Center of Intelligent Sensing Chip Technology School of Communication and Information Engineering, Shanghai University, Shanghai 200444, China

Dapeng Chu was born in Qufu, Shandong, China, in 1997. He received the master’s degree of communication and information system in Shanghai University, Shanghai 200444, China, in 2023. His research interests include phased array antenna, beaming scanning antenna and metamaterials.

Yongjin Zhou, 1) Shanghai Collaborative Innovation Center of Intelligent Sensing Chip Technology School of Communication and Information Engineering, Shanghai University, Shanghai 200444, China 2) State Key Laboratory of Millimeter Waves, School of Information Science and Engineering Southeast University, Nanjing 210096, China 3) Shaanxi Key Laboratory of Artificially-Structured Functional Materials and Devices Air Force Engineering University, Xi’an 710051, China

Yongjin Zhou received the B.S. degree in communication engineering from Shandong University, Jinan, China, in 2006, and Ph.D. degree in electromagnetic field and microwave technology from Southeast University, Nanjing, China, in 2011, respectively. From 2009 to 2010, he was a visiting scholar of University of Houston. From 2011 to 2012, he was a software engineer with EEBU of Marvell Technology (Shanghai) Ltd. From 2012 to 2015, he was an Assistant Professor with School of Communication & Information Engineering, Shanghai University, Shanghai, China. From 2015, he was an Associate Professor with School of Communication & Information Engineering, Shanghai University, Shanghai, China. From 2020, he was a Professor with School of Communication & Information Engineering, Shanghai University, Shanghai, China. His current research interests include plasmonic metamaterials, millimeter wave and THz functional devices, wireless energy transmission, computational electromagnetism. He has served as ACES Journal guest editor and is serving as a Youth Editorial Board Member Journal of Electronics & Information Technology. He is serving as a Reviewer for over 20 peer-reviewed journals, such as Nature Electronics, Photonic Research, Optics Letter, Optics Express, Appl. Phys. Express, IEEE Access, IEEE MTT, and IEEE MWCL. He has served as a session chair for several international symposiums.

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Published

2024-08-31

How to Cite

[1]
Y. . Shi, D. . Chu, and Y. . Zhou, “Ultra-wideband Planar Magic-T using Interlayer Coupling 3 dB Directional Coupler and Branch-loaded Phase Shifter”, ACES Journal, vol. 39, no. 08, pp. 683–690, Aug. 2024.

Issue

2024: Vol 39 Iss 8

Section

Metamaterials and Metadevices for Integrated Sensing, Imaging, and Communication