High-Order Characteristic Modes Suppression for Cross-Band Decoupling in Shared-Aperture Antenna Array

LU Xiaochi; CHEN Yikai; SHEN Tongsheng; GUO Shaojun; ZOU Chunrong; YANG Shiwen

doi:10.1049/cje.2022.00.188

Volume 31 Issue 6

Nov. 2022

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Article Navigation > Chinese Journal of Electronics > 2022 > 31(6): 1121-1128

LU Xiaochi, CHEN Yikai, SHEN Tongsheng, et al., “High-Order Characteristic Modes Suppression for Cross-Band Decoupling in Shared-Aperture Antenna Array,” Chinese Journal of Electronics, vol. 31, no. 6, pp. 1121-1128, 2022, doi: 10.1049/cje.2022.00.188

Citation:

LU Xiaochi, CHEN Yikai, SHEN Tongsheng, et al., “High-Order Characteristic Modes Suppression for Cross-Band Decoupling in Shared-Aperture Antenna Array,” Chinese Journal of Electronics, vol. 31, no. 6, pp. 1121-1128, 2022, doi: 10.1049/cje.2022.00.188

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High-Order Characteristic Modes Suppression for Cross-Band Decoupling in Shared-Aperture Antenna Array

doi: 10.1049/cje.2022.00.188

1.
School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China
2.
National Innovation Institute of Defense Technology, Academy of Military Sciences PLA China, Beijing 100071, China

More Information

Author Bio:
Xiaochi LU was born in 1996. He is currently pursuing the Ph.D. degree in electronic science and technology from the University of Electronic Science and Technology of China, Chengdu, China. His current research interests include base station antennas, metasurfaces and fast algorithms

Yikai CHEN was born in 1984. He received the B.E. and Ph.D. degrees in electromagnetics and microwave technology from the University of Electronic Science and Technology of China (UESTC), Chengdu, China, in 2006 and 2011, respectively. From 2011 to 2015, he was a Research Scientist with the Temasek Laboratories, National University of Singapore, Singapore. In 2015, he joined UESTC, as a Full Professor. His current research interests include ultra-wideband phased antenna arrays, RCS reduction techniques, 5G base station antenna arrays, characteristic mode theory, and time modulation techniques for antenna array systems

Shaojun GUO (corresponding author) received the Ph.D. degree in signal and information processing from Navy Aeronautical University, Yantai, China, in 2017. He is currently an Engineer of National Innovation Institute of Defense Technology. His current research interests include intelligent design, preparation of metamaterials and metamaterial antennas. (Email: guoba2000@163.com)

Shiwen YANG was born in 1967. He received the B.S. degree in electronic science and technology from East China Normal University, Shanghai, China, in 1989, and the M.S. degree in electromagnetics and microwave technology and the Ph.D. degree in physical electronics from the University of Electronic Science and Technology of China, Chengdu, China, in 1992 and 1998, respectively. His current research interests include antennas, antennas arrays, optimization techniques, and computational electromagnetics
Received Date: 2022-06-30
Accepted Date: 2022-10-09

Available Online: 2022-11-12

Publish Date: 2022-11-05

Abstract

Abstract

In dual-band shared-aperture base station antennas, the secondary radiation (SR) field caused by cross-band couplings always leads to radiation pattern distortion. In this work, the SR field caused by the coupling is attributed to the excitation of the target high-order modes from the perspective of the characteristic mode. To effectively suppress the target modes, L-shaped slots are proposed to load the arms of the radiator and altering the current paths. As compared with conventional dipoles without L-shaped slots, the proposed antenna generates less SR field. Therefore, the radiation pattern of the high-band antennas keeps stable in a dual-band shared-aperture antenna array environment. Prototype of a dual-band antenna array consisting of the proposed low-band (LB) antenna and a 4 × 4 high-band (HB) antenna array is fabricated. Simulated and measured results show that the designed dual-band array operates at both 0.74–0.82 GHz and 3.30–3.80 GHz. The experimental results verify that the cross-band decoupling has been achieved with the high-order mode suppression.
- Characteristic modes (CMs),
- Base station antenna,
- Shared-aperture antenna,
- High-order modes suppression

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References(16)

References

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