A Miniaturized Circularly-Polarized Antenna for In-Body Wireless Communications
1
School of Electronics and Information, Guangdong Polytechnic Normal University, Guangzhou 510665, China
2
School of Electronic and Information Engineering, South China University of Technology, Guangzhou 510641, China
*
Author to whom correspondence should be addressed.
Micromachines 2019, 10(1), 70; https://doi.org/10.3390/mi10010070
Received: 5 December 2018
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Revised: 10 January 2019
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Accepted: 16 January 2019
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Published: 19 January 2019
(This article belongs to the Special Issue Implantable Microdevices)
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 × 9.2 mm × 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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MDPI and ACS Style
Fan, Y.; Liu, X.; Li, J.; Chang, T. A Miniaturized Circularly-Polarized Antenna for In-Body Wireless Communications. Micromachines 2019, 10, 70. https://doi.org/10.3390/mi10010070
AMA Style
Fan Y, Liu X, Li J, Chang T. A Miniaturized Circularly-Polarized Antenna for In-Body Wireless Communications. Micromachines. 2019; 10(1):70. https://doi.org/10.3390/mi10010070
Chicago/Turabian StyleFan, Yi, Xiongying Liu, Jiming Li, and Tianhai Chang. 2019. "A Miniaturized Circularly-Polarized Antenna for In-Body Wireless Communications" Micromachines 10, no. 1: 70. https://doi.org/10.3390/mi10010070
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