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J. Electromagn. Eng. Sci > Volume 24(5); 2024 > Article
Journal of Electromagnetic Engineering and Science 2024;24(5):541-543.
DOI: https://doi.org/10.26866/jees.2024.5.l.23    Published online September 30, 2024.
Wideband and Low-Profile Array of Tightly Coupled Dipole Subarrays
Seongjung Kim  , Sangwook Nam 
School of Electrical and Computer Engineering, Seoul National University, Seoul, Korea
Correspondence:  Sangwook Nam,Email: snam@snu.ac.kr
Received: 15 October 2023   • Revised: 31 December 2023   • Accepted: 16 January 2024
Abstract
This letter introduces a novel wideband, low profile, tightly coupled dipole subarray for wireless communication systems. The proposed subarray, composed of 3 × 3 unit elements, offers a planar structure with high aperture efficiency. The unit element is a bow-tie-shaped tightly coupled dipole antenna covered by a frequency-selective surface for wideband operation. Using power dividers with quarter-wave transformers, the proposed subarray achieved an impressive impedance-matching bandwidth of 28.6–41.6 GHz (37.8%). This wideband performance was maintained in a 4 × 4 array configuration as well. The antenna’s low-profile design (0.08λc) and high aperture efficiency (77.2%) set it apart from existing wideband patch array antennas, making it a promising candidate for future wireless communication applications.
Key words: Low-Profile Antenna, Tightly Coupled Dipole Subarray, Wideband Antenna

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