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Joint optimization of broadband decoupling and grating lobe suppression for log-periodic antenna fan-shaped array with wide scanning

Published online by Cambridge University Press:  22 October 2025

Hengfeng Wang Open the ORCID record for Hengfeng Wang [Opens in a new window] ,
Huaning Wu ,
Xuebao Wang ,
Jundi Wang ,
Zhi Huang  and
Jiahao Zhang
Hengfeng Wang
Affiliation:
National Key Laboratory of Electromagnetic Energy, Naval University of Engineering, Wuhan, China
Huaning Wu
Affiliation:
College of Electronic Engineering, Naval University of Engineering, Wuhan, China
Xuebao Wang
Affiliation:
National Key Laboratory of Electromagnetic Energy, Naval University of Engineering, Wuhan, China
Jundi Wang
Affiliation:
National Key Laboratory of Electromagnetic Energy, Naval University of Engineering, Wuhan, China
Zhi Huang*
Affiliation:
National Key Laboratory of Electromagnetic Energy, Naval University of Engineering, Wuhan, China
Jiahao Zhang
Affiliation:
National Key Laboratory of Electromagnetic Energy, Naval University of Engineering, Wuhan, China
*
Corresponding author: Zhi Huang; Email: hzpaperphd@nue.edu.cn
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Abstract

To improve the compactness, broadband, high gain and wide coverage performance of the shortwave antenna (array), this paper introduces the array technology from the LPDA unit antenna, establishes the compact optimization model of the 2×3 elements LPDA fan-shaped array, and proposes an optimization method applied to the broadband decoupling and grating lobe suppression for LPDA fan-shaped phased array, taking the broadband low coupling and non-grating lobe as constraints; By using phased array technology, the wide scanning characteristics of LPDA fan-shaped array are analysed, and the influence of antenna parameters on the mutual coupling is studied when LPDA phased array widely scan. Finally, the feasibility of the truss based 2×3 elements LPDA fan-shaped phased array with a scale of 1:60 is verified through tests. The fan-shaped phased array has a frequency coverage of 13~28 MHz, an average gain of 17.5 dBi in the band, an average beam width of ≥ 30 °, and a scanning range of ≥ 90 °. The proposed array has the characteristics of broadband, low coupling, high gain, wide scanning and compactness. The proposed joint optimization method provides a very promising technical means for the optimization design of complex multi-dimensional phased arrays.

Keywords

array optimizationbroadbanddecouplinggrating lobe suppressionLPDAphased arrayshortwave

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Type
Research Paper
Information
International Journal of Microwave and Wireless Technologies , First View , pp. 1 - 14
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Copyright
© The Author(s), 2025. Published by Cambridge University Press in association with The European Microwave Association.

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