Design of Wideband High Out-of-Band Suppression Filtering Antenna Based on Multi-Lobe Dipole Structure

Authors

  • Jiangling Dou Yunnan Key Laboratory of Computer Technologies Application Kunming University of Science and Technology Kunming, 650500, Yunnan, China, School of Information Engineering and Automation Kunming University of Science and Technology Kunming, 650500, Yunnan, China
  • Yinsu Yuan School of Information Engineering and Automation Kunming University of Science and Technology Kunming, 650500, Yunnan, China
  • Tao Shen Yunnan Vocational College of Mechanical and Electrical Technology Kunming, 650500, Yunnan, China
  • Jian Song School of Information Engineering and Automation Kunming University of Science and Technology Kunming, 650500, Yunnan, China

DOI:

https://doi.org/10.13052/2026.ACES.J.410211

Keywords:

Dual-mode impedance matching structures, electromagnetic shielding isolation wall, filtering antenna, multi-lobe dipole

Abstract

A two-layer filtering antenna based on a multi-lobe dipole structure is presented in this paper. Parasitic substrates and vertical copper elements are incorporated between the upper and lower substrates, with impedance matching improved by overcoming the closed magnetic flux limitation. Filtering performance is achieved through interaction with semi-circular-rectangular dual-mode matching structures and vertical metal, the composite structure can generate reverse current distribution. As a result, high-roll-off radiation nulls are formed and frequency selectivity is enhanced. In order to simultaneously enhance out-of-band suppression, high-current etching technology is employed to reconstruct the current path, etching semi-circular-rectangular dual-shape composite matching structures on the radiation patch, thus a significant improvement in gain stability is achieved. Distributed current control technology is utilized to decompose the dipole into multiple lobes, ensuring uniform current distribution and reducing concentration effects. Etched rectangular holes in the surrounding electromagnetic shielding isolation walls help reduce cross-polarization by suppressing surface waves and edge diffraction. The design achieves an impedance bandwidth exceeding 36%, out-of-band suppression exceeding 32 dB, a peak gain of 8.9 dBi, with cross-polarization levels below -30dB and -26dB in the E- and H-planes, respectively.

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Author Biographies

Jiangling Dou, Yunnan Key Laboratory of Computer Technologies Application Kunming University of Science and Technology Kunming, 650500, Yunnan, China, School of Information Engineering and Automation Kunming University of Science and Technology Kunming, 650500, Yunnan, China

Jiangling Dou was born in 1985 in Jiangsu Province, China. She received her Ph.D. degree in Electromagnetic Fields and Microwave Technology from Southeast University in 2018. She is currently working at Kunming University of Science and Technology. Her research interests include electromagnetic field theory and applications.

Yinsu Yuan, School of Information Engineering and Automation Kunming University of Science and Technology Kunming, 650500, Yunnan, China

Yinsu Yuan was born in 1997 in Qujing, Yunnan, China. She is currently pursuing a master’s degree at Kunming University of Science and Technology, focusing on the design of miniaturized filtering antennas.

Tao Shen, Yunnan Vocational College of Mechanical and Electrical Technology Kunming, 650500, Yunnan, China

Tao Shen (Senior Member, IEEE) earned his Ph.D. from the Illinois Institute of Technology in Chicago, Illinois, USA, in 2013. Presently, he holds the position of President at Yunnan Vocational and Technical College of Mechanical and Electrical Engineering. Dr. Shen has contributed to over 20 publications in prestigious SCIE-indexed journals and leading international conferences within his research domains. His areas of expertise include image processing, artificial intelligence, and the Internet of Energy.

Jian Song, School of Information Engineering and Automation Kunming University of Science and Technology Kunming, 650500, Yunnan, China

Jian Song (Member, IEEE) obtained his Bachelor of Engineering degree in Electronics Information Engineering from Jiangxi University of Science and Technology in Ganzhou, China. He later earned his Ph.D. in Electromagnetic Fields and Microwave Technology from the University of Electronic Science and Technology of China in Chengdu in 2015. Between 2015 and 2019, he served as an Algorithm Engineer at Huawei Technology Co., Ltd. in Shenzhen, China.

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Published

2026-02-20

How to Cite

[1]
J. . Dou, Y. . Yuan, T. . Shen, and J. . Song, “Design of Wideband High Out-of-Band Suppression Filtering Antenna Based on Multi-Lobe Dipole Structure”, ACES Journal, vol. 41, no. 02, pp. 194–202, Feb. 2026.

Issue

2026: Vol 41 Iss 2

Section

Advances in Next-Generation Antenna Systems and Their Testing Methodologies