Next Article in Journal
A Novel Fabricating Process of Catalytic Gas Sensor Based on Droplet Generating Technology
Next Article in Special Issue
Single-Sided Near-Field Wireless Power Transfer by A Three-Dimensional Coil Array
Previous Article in Journal
Vibration Induced Transport of Enclosed Droplets
Previous Article in Special Issue
A Compact Broadband Antenna with Dual-Resonance for Implantable Devices
Open AccessArticle

A Miniaturized Circularly-Polarized Antenna for In-Body Wireless Communications

School of Electronics and Information, Guangdong Polytechnic Normal University, Guangzhou 510665, China
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;
Received: 5 December 2018 / Revised: 10 January 2019 / Accepted: 16 January 2019 / 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. View Full-Text
Keywords: circular polarization; implantable antenna; reactive loading; slow wave effect circular polarization; implantable antenna; reactive loading; slow wave effect
Show Figures

Figure 1

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.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

Search more from Scilit
Back to TopTop