Wideband design of compact monopole-Like circular patch antenna using modal analysis

Research output: Contribution to journalArticle


In this paper, we present a systematic approach to design a compact dual-mode monopole-like patch antenna using characteristic mode analysis (CMA). The modal analysis of a slotted circular patch structure incorporating a new shorting pin loading technique is presented. To achieve a compact monopole-like antenna with wideband operation, it is demonstrated that the first two significant modes with monopole-like patterns are the most suitable ones for dual-mode excitation. Based on the analysis of the modal currents and electric fields, four groups of shorting pins and four slots are introduced to individually tune the two modes, which facilitates the optimization. The effects of these slots and shorting pins on the resonant frequencies of the two modes are analyzed in detail. Finally, a CPW T-junction power divider is applied to simultaneously excite these two modes and suppress the undesired modes. Apart from a more compact form factor and higher gain than existing work, it also features a competitive gain-bandwidth per volume ratio.


External organisations
  • University of Electronic Science and Technology of China
  • Hefei University of Technology
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Other Electrical Engineering, Electronic Engineering, Information Engineering


  • Compact antenna, characteristic mode analysis, patch antenna, multimode antenna
Original languageEnglish
Pages (from-to)918-922
Number of pages5
JournalIEEE Antennas and Wireless Propagation Letters
Issue number6
Publication statusPublished - 2021 Jun
Publication categoryResearch

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Related research output

Li Ying Nie, Xian Qi Lin & Buon Kiong Lau, 2019, 2019 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, APSURSI 2019 - Proceedings. Institute of Electrical and Electronics Engineers Inc., p. 409-410 2 p. 8888574. (2019 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, APSURSI 2019 - Proceedings).

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceeding

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Related projects

Shang Xiang & Buon Kiong Lau

European Commission - Horizon 2020


Project: ResearchIndividual research project

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