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Effective Analysis of Human Exposure Conditions with Body-worn Dosimeters in the 2.4 GHz Band
Published on: May 2, 2018
A Miniaturized Circularly-Polarized Antenna for In-Body Wireless Communications
Yi Fan1, Xiongying Liu2, Jiming Li3
1School of Electronics and Information, Guangdong Polytechnic Normal University, Guangzhou 510665, China. hnanfy@163.com.
Abstract:
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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