A Compact Broadband Antenna with Dual-Resonance for Implantable Devices

Rongqiang Li; Bo Li; Guohong Du; Xiaofeng Sun; Haoran Sun

doi:10.3390/mi10010059

A Compact Broadband Antenna with Dual-Resonance for Implantable Devices

Micromachines (Basel). 2019 Jan 16;10(1):59. doi: 10.3390/mi10010059.

Authors

Rongqiang Li¹, Bo Li², Guohong Du³, Xiaofeng Sun⁴, Haoran Sun⁵

Affiliations

¹ College of Electronic Engineering, Chengdu University of Information Technology, Chengdu 610225, China. liyq2011@cuit.edu.cn.
² College of Electronic Engineering, Chengdu University of Information Technology, Chengdu 610225, China. throbb@163.com.
³ College of Electronic Engineering, Chengdu University of Information Technology, Chengdu 610225, China. dghong@cuit.edu.cn.
⁴ College of Electronic Engineering, Chengdu University of Information Technology, Chengdu 610225, China. sunxf@cuit.edu.cn.
⁵ College of Electronic Engineering, Chengdu University of Information Technology, Chengdu 610225, China. sunhaoran@cuit.edu.cn.

Abstract

A compact broadband implantable patch antenna is designed for the field of biotelemetry and experimentally demonstrated using the Medical Device Radiocommunications Service (MedRadio) band (401⁻406 MHz). The proposed antenna can obtain a broad impedance bandwidth by exciting dual-resonant frequencies, and has a compact structure using bent metal radiating strips and a short strategy. The total volume of the proposed antenna, including substrate and superstrate, is about 479 mm³ (23 × 16.4 × 1.27 mm³). The measured bandwidth is 52 MHz (382⁻434 MHz) at a return loss of -10 dB. The resonance, radiation and specific absorption rate (SAR) performance of the antenna are examined and characterized.

Keywords: Medical Device Radiocommunications Service (MedRadio) band; biotelemetry; implantable antenna; patch antenna; specific absorption rate (SAR).