期刊
MICROMACHINES
卷 10, 期 1, 页码 -出版社
MDPI
DOI: 10.3390/mi10010070
关键词
circular polarization; implantable antenna; reactive loading; slow wave effect
类别
资金
- National Natural Science Foundation of China [61372008]
- Science and Technology Planning Project of Guangdong Province [2014A010103014, 2015B010101006]
- China Scholarship Council [201706155018]
A novel miniaturized single-fed circularly-polarized (CP) microstrip patch antenna operating in the Industrial, Scientific, Medical (ISM) band of 2.40-2.48 GHz, is comprehensively proposed for implantable wireless communications. By employing reactive loading in the arrow-shaped slotted patch to form slow wave effect and embedding V-shaped slots into patch to lengthen the current path, the proposed implantable antenna is minimized with the overall dimensions of 9.2 mm x 9.2 mm x 1.27 mm. The radiation patterns of the proposed antenna illustrate the performance of left-handed circular polarization. The simulated results show that an impedance bandwidth of 7.2% (2.39-2.57 GHz) and an axial ratio bandwidth of 3.7% (2.39-2.48 GHz) at the ISM band are achieved, respectively. Ex vivo measured results are in good agreement with the corresponding simulated ones.
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