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Slot loading effect on impedance and radiation performance of high‐gain patch antenna under TM 03 ‐mode operation
Author(s) -
Hong KaiDong,
Zhang Xiao,
Zhu Lei,
Bi XiaoKu,
Yuan Tao
Publication year - 2019
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.21967
Subject(s) - beamwidth , radiation pattern , radiation , electrical impedance , patch antenna , optics , acoustics , slot antenna , bandwidth (computing) , materials science , antenna gain , antenna (radio) , physics , antenna efficiency , electrical engineering , telecommunications , engineering
Based on antenna's impedance and radiation performance, the slot loading effect on the TM 03 ‐mode high‐gain square patch antenna is investigated in this paper. Three different slot configurations are loaded to the patch along the central line, which can reduce the sidelobe in the E ‐plane. However, it is found that the H ‐plane beamwidth, impedance bandwidth and radiation Q factor become significantly different in these cases. At first, broader H ‐plane beamwidth, lower Q factor and wider impedance bandwidth can be obtained when only single slot is loaded in the center of the patch. In contrast, when two open slots are etched at two nonradiative edges of the patch, it will result in narrower H ‐plane beamwidth, higher Q factor and narrower impedance bandwidth. Moreover, better balanced performance can be achieved by simultaneously loading the central and sided slots. For validation, three kinds of antenna prototypes are designed, fabricated, and measured. The measured and simulated results agree well with each other, which demonstrate that different impedance and radiation performance can be freely adjusted and achieved by using different slot configurations.