Highly Miniaturized Self-Diplexed U-Shaped Slot Antenna Based on Shielded QMSIW

Rusan Barik; Sławomir Kozieł; Qingsha Cheng; Stanisław Szczepański

doi:10.1109/access.2021.3131174

Highly Miniaturized Self-Diplexed U-Shaped Slot Antenna Based on Shielded QMSIW

Abstract

This article presents an efficient yet simple design approach to highly miniaturized cavity-backed self-diplexing antenna (SDA) with high-isolation. The structure employs a shielded quarter-mode substrate integrated waveguide (QMSIW). Two U-shaped slots are engraved on the top conducting plane, which realize two frequency bands and significant size reduction. The slots are excited by two independent 50Ω orthogonal feed-lines to achieve high isolation while enabling radiation at 3.5 GHz and 5.4 GHz. The proposed design approach allows us to design the two frequency bands independently from each other. The SDA structure is verified using an equivalent circuit model, full-wave electromagnetic (EM) analysis, and experimental validation of the antenna prototype. Excellent consistency between simulated and measured responses has been demonstrated. According to the measurement, the SDA has peak gains of 5.26/5.60 dBi at 3.5/5.4 GHz, and the return loss better than 21.6 dB. The isolation between ports is greater than 40 dB, whereas excellent front-to-back-ratio and co-to-cross polarization are obtained for the proposed SDA. Furthermore, the total size of the SDA is only 0.129 λ2, with λ being the guided wavelength at 3.5 GHz.

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Authors (4)

Rusan Barik
Sławomir Kozieł prof. dr inż.
Qingsha Cheng
Stanisław Szczepański prof. dr hab. inż.

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DOI:: Digital Object Identifier (open in new tab) 10.1109/ACCESS.2021.3131174
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Keywords

SUBSTRATE-INTEGRATED WAVEGUIDE, QUARTER-MODE WAVEGUIDE, SHIELDING, ANTENNA, SELF-DIPLEXING

Details

Category:: Articles
Type:: artykuły w czasopismach
Published in:: IEEE Access no. 9, pages 158926 - 158935,
ISSN: 2169-3536
Language:: English
Publication year:: 2021
Bibliographic description:: Barik R., Kozieł S., Cheng Q., Szczepański S.: Highly Miniaturized Self-Diplexed U-Shaped Slot Antenna Based on Shielded QMSIW// IEEE Access -Vol. 9, (2021), s.158926-158935
DOI:: Digital Object Identifier (open in new tab) 10.1109/access.2021.3131174
Verified by:: Gdańsk University of Technology