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

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Wideband design of compact monopole-Like circular patch antenna using modal analysis. / Nie, Liying; Lau, Buon Kiong; Xiang, Shang; Aliakbari Abar, Hanieh; Wang, Bao; Lin, Xian Qi.

In: IEEE Antennas and Wireless Propagation Letters, Vol. 20, No. 6, 06.2021, p. 918-922.

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TY - JOUR

T1 - Wideband design of compact monopole-Like circular patch antenna using modal analysis

AU - Nie, Liying

AU - Lau, Buon Kiong

AU - Xiang, Shang

AU - Aliakbari Abar, Hanieh

AU - Wang, Bao

AU - Lin, Xian Qi

PY - 2021/6

Y1 - 2021/6

N2 - 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.

AB - 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.

KW - Compact antenna

KW - characteristic mode analysis

KW - patch antenna

KW - multimode antenna

U2 - 10.1109/LAWP.2021.3066985

DO - 10.1109/LAWP.2021.3066985

M3 - Article

VL - 20

SP - 918

EP - 922

JO - IEEE Antennas and Wireless Propagation Letters

JF - IEEE Antennas and Wireless Propagation Letters

SN - 1548-5757

IS - 6

ER -