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A Wideband Triple-Mode Differentially-Fed Microstrip Patch Antenna

Liu, Xuekang, Hu, Wei, Gao, Steven, Wen, Lehu, Luo, Qi, Xu, Rui, Liu, Ying (2021) A Wideband Triple-Mode Differentially-Fed Microstrip Patch Antenna. IEEE Antennas and Wireless Propagation Letters, 20 (7). pp. 1160-1164. ISSN 1536-1225. (doi:10.1109/LAWP.2021.3074302) (KAR id:103053)


A wideband differentially-fed microstrip patch antenna (MPA) with tripe-resonant modes is presented in this letter. The proposed triple-mode MPA is realized by combining two dual-mode MPAs (MPA-I and MPA-II) with different resonant frequency ratios. Firstly, the TM0,1 mode and TM0,1/2 mode of dual-mode MPA-I can be concurrently excited by adding a pair of coupling shorted patches beside the strip MPA. The ratio of f0,1/2/f0,1 can be easily adjusted by moving the shorting pins between the strip MPA and shorted patches. Secondly, by properly designing the dimensions of a conventional MPA, the TM0,1 and TM2,1 modes of dual-mode MPA-II are simultaneously excited. To further reduce the ratio of f2,1/f0,1, four slots are elaborately etched on the conventional MPA. Finally, by combining the two dual-mode MPAs, a triple-mode MPA with the frequency ratio of f0,1/2:f2,1:f0,1 = 1.2:1.1:1 is realized. To verify the design concept, a prototype of triple-mode MPA was fabricated and measured. Experimental results show that the proposed microstrip antenna achieves a wide bandwidth of 26.5%, a low cross-polarization of -23 dB, and high harmonic suppression.

Item Type: Article
DOI/Identification number: 10.1109/LAWP.2021.3074302
Additional information: For the purpose of open access, the author has applied a CC BY public copyright licence to any Author Accepted Manuscript version arising from this submission.
Subjects: T Technology > TK Electrical engineering. Electronics. Nuclear engineering > TK5101 Telecommunications
Divisions: Divisions > Division of Computing, Engineering and Mathematical Sciences > School of Engineering and Digital Arts
Funders: Engineering and Physical Sciences Research Council (
Depositing User: Xuekang Liu
Date Deposited: 28 Sep 2023 12:45 UTC
Last Modified: 29 Sep 2023 08:54 UTC
Resource URI: (The current URI for this page, for reference purposes)

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